KR20190059617A - Method of polyurethane resin compounds including polythiol and mobile device bezel adhesive tape using the same - Google Patents

Abstract

The present invention relates to a method for preparing a resin composition including polythiols for a display adhesive having excellent adhesion while maintaining high tensile strength, and to an adhesive tape for a mobile device including the same. The method of the present invention comprises the steps of: preparing a composition A; preparing a random copolymer composition C; preparing polyurethane acrylate oligomer; and preparing a polyurethane acrylate adhesive composition.

Description

TECHNICAL FIELD The present invention relates to a method for producing a resin composition comprising a polythiol for a display adhesive and an adhesive tape for a mobile device comprising the polythiol for a display adhesive.

The present invention relates to a process for producing a resin composition comprising a polythiol for a display adhesive and a resin composition containing the same, and more particularly, to a resin composition comprising a polythiol for a display adhesive having a high tensile strength, And a resin composition containing the same.

Recently, mobile devices such as smart phones and smart pads are capable of not only a simple function for a phone call but also multimedia contents such as photographing and movie shooting, furthermore, it is possible to play back stored music and movies, Various functions such as navigation service and exercise record can be used. In addition, it provides a variety of functions such as downloading or uploading multimedia contents by accessing a communication system in real time, thereby providing many convenience to the user. Therefore, many users are using mobile devices in various ways for their hobbies and leisure activities.

Typical mobile devices, however, are built with precise structures that contain a large number of electronic components inside. Therefore, if the user accidentally falls or is impacted by external factors, it can easily break. Particularly, when the outer case is bonded with two parts using an adhesive or an adhesive tape, since the bonding surface has the weakest strength, the outer case is split into two parts when an impact is applied from the outside, or when the display is bonded, It may break and cause the user to bear a lot of repair costs. Therefore, many manufacturers have introduced a unibody case-like structure to solve this problem, but this is not a way to solve the more fundamental problem.

In particular, when using a mobile device in an outdoor environment, various non-general external factors such as collision, falling, and shaking can be transmitted to the mobile device due to the active movement of the user, A strong impact is applied. It is necessary to devise a method of protecting mobile devices by dispersing them because mobile devices may be easily damaged due to such shocks. In order to allow users to easily use mobile devices in extreme environments, A method has been devised which improves the impact property and absorbs and disperses the impact applied from the outside. The most common method has been applied to a mobile device by designing an adhesive or adhesive tape for bonding a case or a display to a shock absorbing structure. A method of absorbing an amount of an impact applied to a mobile device has been provided.

In addition, when a user is exposed to a large amount of water in a water-humid environment, a water park, a swimming pool, a beach, or the like, It penetrates and breaks the device. Especially in places where there is a large amount of salt such as beaches, water parks, swimming pools, etc., where water and minerals are added forcibly, water penetrates more quickly by osmotic phenomenon, and at the same time, Can cause corrosion and erosion more quickly than ordinary tap water. In such a case, the general drying furnace can not reuse the electronic device again, and there is a fear that the entire mobile device must be replaced because the repair itself is impossible.

Therefore, many manufacturers have introduced a unibody case-like structure to solve this problem, but this is not a way to solve the more fundamental problem.

In particular, intense leisure activities at the waterfront such as water skiing and skin scuba

Are exposed to high water pressure due to the active movement of the user and high water pressure, and various non-general external factors such as collision, falling, and shaking can be transmitted to the mobile device, More stress is applied than normal use. These stresses can make mobile devices more susceptible to breakage, so there has been a need to devise ways to protect mobile devices in these environments and to make it easier for users to use mobile devices in extreme environments The structure of a waterproof mobile device has been devised.

Therefore, a more advanced method is needed to solve the above-mentioned problems, and it is desirable to design the structure of the mobile device to be waterproof and good in impact resistance. However, in the outer part such as the design becomes thick and the thickness becomes thick Problems can arise. Therefore, in order to improve the waterproof property and the impact resistance of the mobile device while maintaining the existing design, a joining method which is more rigid, waterproof and easy to absorb shock was required in the bezel portion connecting the case and the display, Various inventions have been carried out in advance.

Korean Patent Laid-Open No. 10-2013-0092112 The invention of a double-sided tape for a touch screen panel having excellent impact resistance is related to a double-sided tape for a touch screen panel having excellent impact resistance, and more particularly, A base layer formed by forming a foamed foam coating layer, an adhesive layer formed on the upper and lower surfaces of the base layer described above, and a release layer formed on the outer surface of the above-mentioned adhesive layer. The double-sided tape for a touch screen panel having excellent impact resistance described above is positioned between the touch screen panel module and the liquid crystal module and firmly adheres to the touch screen panel module and the liquid crystal module, and exhibits excellent heat resistance and impact resistance. However, the above-mentioned invention improves the impact resistance, but since it is made of an acrylic foamed foam, the structure is not dense and the thickness can be thickened.

In addition, Korean Patent Laid-Open No. 10-2009-0037966 discloses a curable epoxy resin-

The invention of an adhesive composition relates to a composition useful as an adhesive, more particularly to a process for preparing an epoxy-based adhesive composition having improved adhesion and / or improved impact resistance to an oiled metal substrate, The present invention proposes a composition capable of exhibiting excellent impact resistance while forming strong adhesion even on oils and contaminated metal surfaces, including rubber particles having a shell structure, polyurethane and a plate-like filler.

However, the above-mentioned invention suggests a structure capable of improving impact resistance, but does not provide any effect on water resistance.

Korean Patent No. 10-1625605 discloses a cushioning tape having a light-shielding and waterproof function and a cushioning tape having a light-shielding function. The cushioning tape is provided with a foamed foamed foam to form a primary waterproofing and buffering effect Cushioning film; A waterproof film provided with a waterproof polymer having a porosity of 1% to 50% and formed to have a secondary waterproof effect; And a light blocking layer printed on the waterproof film and disposed between the waterproof film and the cushioning film and having a colored material, wherein the light blocking layer is formed by extruding a mixture of a waterproof polymer, a colored pigment, and aluminum oxide (Al2O3) Or shock-absorbing tape having a light-shielding and waterproof function, which is produced by cast molding, and absorbs the impact applied to the object through the constitution of the foamed foamed foam. Thus, it is possible to prevent a considerable amount of breakdown of the object and a failure phenomenon caused by the impact. In addition, when the buffer tape having the function of preventing light leakage is attached to the window panel of the portable terminal, light leaking from the display panel of the portable terminal can be easily blocked through the structure of the light blocking film adhered to the buffer film, The finishing quality of the terminal can be further improved. Further, the fine clearance of the object can be firmly sealed through the constitution of the waterproof polymer, and the waterproof function can be provided to the object. However, the above-described invention is not preferable for application to an adhesive tape for a waterproof mobile device at a low price because the structure is very complicated since the layer constituting the tape must be composed of five or more layers. In addition, since a light blocking layer including a colored pigment and aluminum oxide is constituted, the whole color is colored, so that the bonding surface of a mobile device can be seen to be more intricate.

As described above, the conventional adhesive composition having improved impact resistance or waterproofness and the tape using the same has a complicated structure. Since the process steps for producing the adhesive composition are very complicated, The cost burden can be improved for the user.

In recent years, there has been a growing demand for a thinner adhesive tape due to the slimness of mobile devices, but satisfactory results have not been obtained.

Accordingly, in the present invention, there is a need for an improved technique for an adhesive tape having a thin thickness and capable of improving the adhesive strength while maintaining impact resistance on one tape.

Korea Patent Publication No. 2013-0092112 Korea Patent Publication No. 2014-0105119 Korean Patent No. 1222195

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and the technical problems required from the past.

The inventors of the present application have conducted intensive studies and various experiments and have found that a method for producing a resin composition comprising a polythiol for a display adhesive having an extremely thin film thickness and a high adhesive strength while maintaining a high tensile strength And an adhesive tape for a mobile device comprising the adhesive tape.

In order to accomplish the above object, the present invention provides a method for producing a resin composition comprising a polythiol for a display adhesive,

A polythiol containing at least two functional groups, a polyol having a pair of hydroxyl groups (-OH), at least one selected from the group consisting of hydrogenated polybutadiene diol, polydimethylsiloxane diol, fluorine diol, polypropylene glycol and polyethylene glycol Preparing a composition A comprising at least two types;

Adding a compound B containing isocyanate to the composition A to prepare a random copolymer composition C containing a pair of isocyanate (NCO) functional groups; And

Preparing a polyurethane acrylate oligomer by adding a fluorine monol having one hydroxy group to the composition C; And

And mixing the waterproof polyurethane acrylate oligomer with at least one adhesion imparting agent to prepare a polyurethane acrylate adhesive composition.

In one preferred embodiment of the present invention, the step of producing the random copolymer composition C comprises:

Preparing 50 to 80 parts by weight of the composition A based on 100 parts by weight of the composition C;

Mixing the composition A in a stirrer at 50 to 100 rpm;

Adding 20 to 50 parts by weight of the compound B to the stirred composition A based on 100 parts by weight of the composition C; And

And adding a condensation polymerization catalyst to the composition A to which the compound B is added to effect polymerization in an environment of a stirring speed of 200 to 300 rpm and a temperature of 50 to 85. [

In one preferred embodiment of the present invention, the condensation polymerization catalyst is selected from the group consisting of 2-methyltriethylene diamide, 1,4-diazabicyclic [2,2,2] octane, bis (2-dimethylaminoethyl) Ethyl ethanolamine, N, N, N1, N1, N2-pentamethyldiethylenetriamine, N, N1-dimethylethanolamine, dimethylaminopropylamine, N-ethylmorpholine, N, N, N-dimethylcyclohexylamine, tertiary amines including 2-methyl-2-azanoborane, aprotic salts including quaternary ammonium and carboxylate salts of alkali metal and copper naphthenate, cobalt naphtho At least one selected from the group consisting of metal nitrate, zinc naphthate, n-dibutyl tin dilaurate, tristyl amine, dibutyl tin diacetate and dibutyl tin dim mercute.

In one preferred example of the present invention, the isocyanate compound is an isocyanate compound,

2,4-tolylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, Methylene-diphenylmethane diisocyanate, methylene diphenyl diisocyanate (MDI), 1,6-hexane diisocyanate, 1,3-xylene diisocyanate, diphenylmethane-4,4-diisocyanate, Selected from the group consisting of isocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane and 1,4-bis (isocyanatomethyl) cyclohexane And may include at least one kind or more.

In one preferred embodiment of the invention, the tackifier is selected from the group consisting of hydroxyethyl acrylate (HEA), hydroxypropyl acrylate (HPA), hydroxybutyl acrylate (HBA) and hydroxyethyl methacrylate (2- HEMA). ≪ / RTI >

In one preferred embodiment of the present invention,

3,5-di (trifluoromethyl) phenyl] methanol, 1,1,1,3-tetrafluorobenzyl alcohol, , 3,3-hexafluoro-2-propanol, 1,1,1,3,3,3-hexafluoro-2-methylisopropanol, hexafluoro-2- (p-tolyl) isopropanol, 4,5 , 5,6,6,6-hexafluoro-4- (trimethyl) -1-hexanol, 4,4,5,5,5-pentafluoropentanol, pentafluoropropionaldehyde, 1H, 1H , 5H-octafluoro-1-pentanol and

Pentafluorobutane-2-ol, and pentafluorobutane-2-ol.

In one preferred embodiment of the present invention, the step of preparing the polyurethane acrylate oligomer may be stirred at 200 to 500 rpm in an environment at a temperature of 60 to 90. [

In one preferred embodiment of the present invention, the step of producing the polyurethane acrylate adhesive composition comprises:

0.5 to 15 parts by weight of the adhesive agent to 100 parts by weight of the waterproof polyurethane acrylate oligomer; And

And stirring the resulting composition in an agitator at 200 to 500 rpm in an environment of 60 to 90 to proceed the polymerization reaction.

Meanwhile, the present invention provides an adhesive tape for a mobile device manufactured using the method for producing a polyurethane resin composition.

In one preferred example of the present invention, the adhesive composition for a mobile device may be applied to a substrate having a thickness of 20 to 70 mu m by 10 to 60 mu m.

In one preferred embodiment of the present invention, the adhesive tape for a mobile device may have an adhesive strength of 2 to 10 kgf / in, a shear adhesive strength of 5 to 15 kgf / cm ² or more, a holding strength of 7,000 to 15,000 min and a heat resistance of 120 to 200 ° C .

INDUSTRIAL APPLICABILITY As described above, the process for producing a resin composition comprising a polythiol for a display adhesive according to the present invention and the adhesive tape for a mobile device comprising the same have a very thin film thickness and an excellent adhesive strength while maintaining a high tensile strength .

1 is a schematic view of an adhesive tape for a mobile device according to an embodiment of the present invention;
2 is a process diagram illustrating a process of manufacturing an adhesive tape for a mobile device according to an embodiment of the present invention.

The following description of the invention refers to specific embodiments in which the invention may be practiced by way of illustration. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment.

The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained.

Further, unless otherwise specified, "substituted" to "substituted" means that at least one hydrogen atom of the functional group of the present invention is substituted with a halogen atom (-F, -Cl, -Br or -I) A nitro group, a cyano group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group, an ester group, a ketone group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alicyclic hydrocarbon group, , A substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted heteroaryl group, and a substituted or unsubstituted heterocyclic group, , The substituents may be connected to each other to form a ring.

In the present invention, the term "substituted" as used herein means an aryl group substituted with a substituent such as a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, .

The above-mentioned "hydrocarbon group" means a linear, branched or cyclic saturated or unsaturated hydrocarbon group unless otherwise specified, and the alkyl group, alkenyl group, alkynyl group and the like may be linear, branched or cyclic.

Further, unless otherwise specified in the present specification, "alkyl group" means C1 to C30 alkyl group, and "aryl group" means C6 to C30 aryl group. In the present specification, the "heterocyclic group" refers to a group containing 1 to 3 hetero atoms selected from the group consisting of O, S, N, P, Si and combinations thereof in one ring. Examples thereof include pyridine, Thiophene, pyrazine, and the like, but is not limited thereto.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to which the present invention pertains.

As described above, conventionally, there has been a problem that the adhesive strength is reduced when excellent impact resistance is maintained.

In the present invention, the polythiol is introduced into the urethane acrylate chain in addition to the diol. Thus, even when the curing density is increased, the adhesive force can be greatly improved while maintaining the tensile strength, .

The polyurethane adhesive resin composition to which the polythiol is introduced according to the present invention comprises a polythiol containing at least two functional groups, a polyurethane resin comprising a pair of hydroxyl groups (-OH), a hydrogenated polybutadiene diol, a polydimethylsiloxane diol, a poly Preparing a composition A comprising at least two selected from the group consisting of propylene glycol and polyethylene glycol;

Adding a compound B containing isocyanate to the composition A to prepare a random copolymer composition C containing a pair of isocyanate (NCO) functional groups; And

Preparing a polyurethane acrylate oligomer by adding a fluorine monol having one hydroxy group to the composition C; And

And mixing the waterproof polyurethane acrylate oligomer with at least one adhesion imparting agent to prepare a polyurethane acrylate adhesive composition.

Since the polymerization reaction can be performed without imposing a precise basis weight, the process can be simplified and the manufacturing cost can be reduced, thereby enabling mass production at a higher speed Lt; / RTI > Further, since the composition A is composed of a random copolymer, a binary and a ternary copolymer may be respectively formed, or a binary and a ternary copolymer may be formed together.

As described above, the composition C is composed of a binary or tri-random copolymer (hereinafter referred to as a binary / tri-random copolymer). That is, the composition C is synthesized through compound B by selecting two or more kinds of compounds A in the composition A. In the two-member / three-way random copolymer, the different monomers repeatedly form covalent bonds to form a copolymer. Is referred to as a random copolymer. Therefore, since the random copolymer of the block copolymer or the graft copolymer has a more random chain structure than the block copolymer or the graft copolymer structure because the monomer C having random molecular weights is randomly bonded, And the effect of being able to absorb external impacts can be further improved.

The polythiol in the composition A may be used in combination with a plurality of polythiol compounds. The polythiol compound may be used alone or in combination of two or more.

In specific examples, mention may be made of bis (2-mercaptoethyl) sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 1,3-bis (mercaptomethyl) benzene, Methyl) benzene, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiandecane, 4,7-dimercaptomethyl-1,11-dimercapto- , 6,9-trithiandecane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 1,2-bis [ ) Thio] -3-mercaptopropane, 1,1,3,3-tetrakis (mercaptomethylthio) propane, pentaerythritol tetrakis mercaptopropionate, pentaerythritol tetrakisthioglycolate, trimethylolpropane tris Thioglycolate) and trimethylolpropane tris (mercaptopropionate), and more preferably bis (2-mercaptoethyl) sulfide, 2,5-bis (2-mercaptomethyl) , 1,3-bis (mercaptomethyl) benzene, pentaerythritol tetrakisme Mercaptopropionate, may be selected from the group consisting of 1,2-bis [(2-mercaptoethyl) thio] -3-mercapto-propane, pentaerythritol tetrakis thioglycolate.

The hydrogenated polybutadiene diol in the composition A is one of the structural units of the hydrogenated polyolefin, and includes 1,3-butadiene, 1,3-pentadiene, isoprene, 2,3-dimethyl-1,3-butadiene, Butadiene, 2-propyl-1,3-butadiene, 1,3-heptadiene, 6-methyl-1,3-heptadiene, 1,3-hexadiene, , A structural unit obtained by hydrogenating a polydiene structural unit obtained by polymerizing at least one diene selected from 4-hexadiene, 2,5-dimethyl-2,4-hexadiene and 1,3-octadiene have. Of these, preferred examples thereof include a structural unit obtained by hydrogenating a polybutadiene structural unit, a structural unit obtained by hydrogenating a polyisoprene structural unit, or a structural unit obtained by hydrogenating a poly (butadiene-isoprene) structural unit.

The hydrogenated polybutadiene diol of the composition A has two or more hydroxyl groups in one molecule, but preferably has 2 to 4 hydroxyl groups. The hydroxyl value of the hydrogenated polyolefin diol is preferably 10 to 80 mgKOH / g, more preferably 17 to 70 mgKOH / g, and particularly preferably 23 to 65 mgKOH / g. If the hydroxyl value of the hydrogenated polyolefin polyol compound is less than 10 mgKOH / g, the overall molecular weight and viscosity become excessively high, which makes handling difficult and may cause problems in synthesis afterwards. If the hydroxyl value of the hydrogenated polyolefin diol compound is larger than 80 mgKOH / g, the volume shrinkage ratio during synthesis becomes too high, the cohesive force of the polymer becomes too high, and the performance of the polymer can not be sufficiently exerted. In addition, the polybutadiene diol exhibits a low glass transition temperature, and because of its high stereoregularity, it has excellent tensile properties and mechanical properties such as 300% modulus. Therefore, when these compounds are provided as copolymerized monomers of urethane compounds, , The fluorine compound can be uniformly mixed and the mechanical properties such as the improvement of the adhesive strength can be improved when the adhesive for mobile devices is formed.

And the polydimethylsiloxane diol of the composition A contains a hydroxy group at the terminal of the polydimethylsiloxane (PDMS) and can be included in a composition aiming at waterproofing because of its excellent waterproofness and low humidity resistance.

The fluorine diol of composition A may comprise a pair of hydroxy groups. The fluorodiols are hexafluoro-2,3-bis (trifluoromethyl) butane-2,3-diol, 2,2,3,3,4,4,5,5,6,6,7,7 -Dodecafluoro-1,8-octanediol or 3,3,4,4,5,5,6,6-octafluoro-1,6-hexanediol, preferably hexa Fluoro-2,3-bis (trifluoromethyl) butane-2,3-diol or 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoro -1, < / RTI > 8-octanediol. The fluorine diol preferably has a fluorine-substituted carbon number of 1 to 6 and a fluorine diol having a smaller number of carbon atoms than the perfluorocarbon having 8 or more carbon atoms, which is problematic in toxicity. Therefore, it is possible to produce a more eye-catching composition with less environmental load. In addition, due to the nature of the fluorine diol, it is a preferable compound that can improve the waterproofing effect in forming the waterproof polyurethane resin composition according to the embodiment of the present invention because the humidity resistance is low and the waterproofing performance is excellent.

The fluorine diol may further include a carbonate group as well as a hydroxyl group, and may preferably include a polyethylene carbonate diol. The fluorine compound further comprising a carbonate group exhibits an effect of significantly improving the water permeability and the oxygen permeability blocking effect in the production of the resin composition for an adhesive. In comparison with the urethane compound to which a fluorine compound not containing a carbonate group is applied, It is possible to further reinforce the effect of having excellent water repellency and adhesion even when the content of the fluorine compound is lower than that of the conventional fluorine compound. Therefore, the water repellent polyurethane resin composition can be more effectively constituted. In addition, by designing the molecular structure so that the fluorinated alkyl group and the carbonate group intersect, there is a characteristic that weather resistance, light resistance and the like are superior to those of conventional urethane compounds, and resistance to corrosion is strong. In producing a fluorinated polycarbonate diol, The reaction proceeds in-situ through the intermediates of the carbonate of the present invention.

Compound B may be composed of a compound containing an isocyanate. The isocyanate compound may be selected from the group consisting of toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate or naphthalene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,4-xylene diisocyanate, 1,5-naphthalene diisocyanate, 2,4-trilene diisocyanate, 2,6-trilene diisocyanate, 1,3-xylene diisocyanate, diphenylmethane- Diisocyanate, 3-methyl-diphenylmethane diisocyanate, methylene diphenyl diisocyanate (MDI), 1,6-hexane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, 1,3 - bis (isocyanatomethyl) cyclohexane and 1,4-bis (isocyanatomethyl) cyclohexane And it may be configured to include at least one or more selected from the group consisting of. If necessary, a further curing agent may be added. Isocyanate is characterized by hydrophobicity and waterproof property and lowers the moisture content of the composition and improves the waterproofing property. Therefore, it is a desirable compound to further include the waterproofing property of the polyurethane resin composition having impact resistance have.

Examples of the isocyanate-based curing agent include methylene diphenyl diisocyanate, hexamethylene diisocyanate, 4,4-dicyclohexylmethane, 4,4-dicyclohexylmethane diisocyanate and the like. Examples of the isocyanate- Diisocyanate, and toluene diisocyanate. Examples of the polyisocyanate compound include 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 4,4'-diisocyanatodiphenylmethane, xylene diisocyanate, Isophorone diisocyanate and the like, or a polyisocyanate compound composed of the above polyisocyanate compound and a polyisocyanate compound such as ethylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, polyoxyethylene glycol and long chain higher alcohol A low molecular weight active hydrogen compound or the like is reacted Include compounds having a plurality of isocyanate group terminals in the molecule. In addition, when the hardener is added to the isocyanate in an excessive amount, it is necessary to pay careful attention to the hardener since the hardener may be cured at an unexpected time or harder than the target.

The polythiol-introduced polyurethane resin composition according to the embodiment of the present invention may include at least one adhesive agent. Wherein the tackifier is selected from the group consisting of hydroxyethyl acrylate (HEA), hydroxypropyl acrylate (HPA), hydroxybutyl acrylate (HBA) and hydroxyethyl methacrylate (2-HEMA) Or more. The adhesive agent may have a number average molecular weight of 200 to 10000, preferably 200 to 3000, more preferably 300 to 1000. The adhesive agent may be added to the composition C obtained through the synthesis of the composition A and the compound B described above to give the adhesive performance or further strengthen the adhesion.

In addition, the polyurethane resin composition having high impact resistance according to the embodiment of the present invention may further include an acrylate-based adhesive composition for enhancing the adhesive strength. (Meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentadienyl (meth) acrylate, and combinations thereof, and acrylic acid-based adhesive compositions Based resins such as vinyl chloride, vinylidene chloride, vinylidene chloride, vinylidene chloride, and the like, such as polyolefins, polyesters, polyesters, polyesters, polyesters, polyesters, alkylester resins, styrene-butadiene copolymers, polyisoprene rubbers, polyoxybutylene rubbers, (Meth) acrylic resins including fluorine-containing alkyl acrylate polymer components, but are not limited thereto.

The polyurethane resin composition according to an embodiment of the present invention may further include a fluorine monol having one hydroxy group. In addition, the fluorine monools contained are located between the chain structures of random copolymers to further improve the waterproof performance, and since the fluorine monool itself has low surface energy, it exhibits hydrophobicity, so that the waterproof performance can be further improved.

When a polyol compound and a diisocyanate compound are subjected to a urethane reaction, fluorine monools do not enter the center of the urethane main chain, but substituent groups are inserted into the ends of the urethane compounds by an endcapping method. As a result, It can affect the fluoride exposure on the surface. The fluorine monool is composed of a monomer or a polymer containing CF 3 [CF 2] nOH and may include a hydroxyl group (-OH) at one end of its molecular structure.

The polyurethane adhesive resin composition containing rubber particles according to the embodiment of the present invention may comprise rubber particles composed of a core-shell structure. The rubber particles absorb the impact and improve the thickness capability of forming the thickness, and the effect of further improving the water resistance can be obtained. The rubber particles have an average particle size of from 100 to 1,000 nm and the core is selected from the group consisting of homopolymers of silicone, butadiene, isoprene, butadiene, isoprene, (meth) acrylonitrile, (meth) acrylate and polysiloxane elastomers, (meth) (Meth) acrylate, methyl methacrylate, styrene, acrylonitrile, acrylic acid, (meth) acrylate, and the like. Methacrylamide copolymers, and the like. The core of the rubber particles may be an inelastic polymer or a polymer with low elasticity. Therefore, it is preferable that the modulus of elasticity of the shell is higher than that of the core. The reason for this is that the number of rubber particles is large in absorbing the impact, so that the amount of impact can be sufficiently absorbed only by the thickness of the shell. If the core is not rigid, the shape of the particles may collapse and become non-spherical. Therefore, the elastic modulus of the core needs to be lower than that of the shell. In addition, the shell may further comprise an ionically crosslinked acid group through metal carboxylate formation for stronger bonding with the core. The core may be composed of 50 to 85% by weight based on 100% by weight of the total rubber particles, and the shell may be composed of 15 to 50% by weight.

In addition, a transparency promoter may be further added to enhance the transparency for improving the elongation at break and the aesthetic effect of the appearance. The epoxy ester (meth) acrylate is obtained by reacting phenylglycidyl ether with (meth) acrylic acid (Meth) acrylate, (t-butylphenyl) phenylglycidyl ether and (meth) acrylate obtained by reacting monofunctional epoxy ester (meth) acrylate, (methylphenyl) phenylglycidyl ether with (meth) (Meth) acrylate obtained by reacting (meth) acrylic acid with (meth) acrylic acid and a monofunctional epoxy ester (meth) acrylate obtained by reacting (ethylhexyl) glycidyl ether methyl (Meth) acrylate having an alkyl group of 1 to 30 carbon atoms, preferably phenylglycidyl ether and (meth) acrylic acid, (Meth) acrylate, (t-butylphenyl) phenylglycidyl ether and (meth) acrylate obtained by reacting (meth) acrylate, (meth) Aromatic epoxy ester (meth) acrylate of monofunctional epoxy ester (meth) acrylate reacted with acrylic acid is preferred. The addition of a transparency promoter together with an adhesion-imparting agent improves the elongation at the time of tensile fracture and increases the transparency. Further, it has the advantage of increasing the heat resistance of the surface, maximizing the antifouling property and water repellency, .

The organic solvent for constituting the polyurethane resin composition having high impact resistance according to the embodiment of the present invention may include all organic solvents which can be used for constituting the general adhesive composition and more specifically, acetone, methanol, ethanol, At least one selected from the group consisting of methyl ethyl ketone, toluene, ethyl acetate, butyl acetate, acetone, butyl carbitol, butyl carbitol acetate, butyl cellosolve, butyl cellosolve acetate and terpineol . The solvent is preferably contained in an amount of less than 30 parts by weight based on 100 parts by weight of the total composition. When the solvent is contained in an amount of 30 parts by weight or more, the viscosity of the solvent is lowered. Bubbles may form on the surface. In addition, when it is applied in an amount less than 30 parts by weight, the impact resistance of the touch panel can be improved and the printed steps of the surface can be absorbed. It is therefore important to add the amount of solvent excessively.

The polyurethane resin composition to which the polythiol is introduced according to the embodiment of the present invention may further contain additives in a proportion of 0.1 to 10 parts by weight based on 100 parts by weight of the total composition. The additives may include leveling agents, defoamers, stabilizers, oxidizing agents Surfactants, ultraviolet absorbers. A wetting agent, and an antirust agent. In this case, the stabilizer may be, for example, a diethylethanolamine, a tertiary amine such as trihexylamine, a hindered amine, an organic phosphate, a hindered phenol, gelatin, methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose , Water-soluble polymers such as carboxymethylcellulose, polyethylene glycol, polyoxyethylene-polyoxypropylene block copolymer, polyacrylamide, polyacrylic acid, polyacrylate, sodium alginate and polyvinyl alcohol partial saponification, tricalcium phosphate, titanium oxide , Calcium carbonate, and silicon dioxide, but is not limited thereto. In addition, the surfactant that can be added for stabilizing the dispersion may include at least one of sodium dodecylbenzenesulfonate, sodium dialkylsulfosuccinate, sodium lauryl sulfate or polyethylene glycol nonylphenyl ether as a specific example, It is not.

The polythiol-introduced polyurethane resin composition according to the embodiment of the present invention can be applied to the surface of a substrate to form an adhesive tape. The substrate may be selected from the group consisting of polyethersulfone, polyacrylate, polyether imide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulose triacetate and cellulose acetate propionate And at least one of the above-mentioned materials. The thickness of the substrate is preferably 50 to 70 mu m, and it is ductile and can be easily stored, handled and handled in a roll form. The tensile strength is preferably 0.3 to 1.5 Kgf / mm ² as a standard test standard of ASTM D638, ASTM D882, ISO527, and KS M3006. In particular, the thinner the substrate, the higher the tensile strength needs to be. The shear bond strength (adhesion) is measured by a test standard of ASTM D-1002, ASTM D3163, and KS M3734-2011, and the shear bond strength may be 4 to 7 Kgf / cm ² , more preferably 5 to 6 Kgf / cm < ² >.

A process for producing a polyurethane resin composition according to an embodiment of the present invention comprises the steps of preparing a composition A comprising a polythiol containing at least two functional groups and a pair of hydroxyl groups (-OH), a compound containing an isocyanate B, adding the compound B to the composition A and mixing the mixture at 200 to 300 rpm, adding a condensation polymerization catalyst to the mixture, maintaining the mixture at 50 to 85 for 2 to 3 hours, NCO) functional group; and a step of adding an adhesion imparting agent to the composition C to raise the temperature to 60 to 90 to form a waterproof polyurethane resin composition.

The method for preparing a polyurethane resin composition according to an embodiment of the present invention may include 0.5 to 15 parts by weight of an adhesion imparting agent to 100 parts by weight of a random copolymer composition C containing a pair of isocyanate (NCO) The composition C may be composed of 50 to 80 parts by weight of the composition A, 20 to 50 parts by weight of the compound B and 0.1 to 10 parts by weight of the condensation polymerization catalyst based on 100 parts by weight of the composition C. As described above, the composition A may include at least two kinds selected from the group consisting of hydrogenated polybutadiene diol, polydimethylsiloxane diol, fluorine diol, polypropylene glycol, and polyethylene glycol.

Hereinafter, exemplary embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are intended to aid understanding of the present invention, and the present invention is not limited by the following experimental examples.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

[Manufacturing Example]

Production Example 1. Preparation of Polythiol

2-mercaptoethanol (100 g, 1.28 mol) was added to a 2 L two-necked flask equipped with a condenser, and a sodium hydroxide 30% solution (170.63 g, 1.28 mol) was slowly added dropwise at room temperature. Thereafter, the mixture was stirred for 0.5 hour while maintaining the reaction temperature at room temperature, and the temperature was raised to 60 ° C. 1,2-Dichloroethane (53.71 g, 0.32 mol) dissolved in ethanol (100 g) was slowly added dropwise and stirred for 6 hours. After the reaction was completed, the solvent was removed under reduced pressure after filtration, followed by filtration under reduced pressure. Then, thiourea (121.78 g, 1.60 mol) and concentrated hydrochloric acid (35%, 200.20 g, 1.92 mol) were added to the reaction solution obtained above and refluxed at 110 ° C for 10 hours. After the reflux reaction was completed, the reaction mixture was cooled to room temperature, and toluene was added thereto. Then, ammonia water (168.81, 2.88 mol) was slowly added dropwise and hydrolyzed at 75 ° C for 1 hour. The product was cooled to room temperature and transferred to a separatory funnel for layer separation. At this time, the water layer was discarded, and the organic layer was washed once with concentrated hydrochloric acid, once with water, once with diluted ammonia water, and then twice with water. The obtained organic layer was dried with MgSO ₄ , filtered under reduced pressure, and the reaction product was concentrated under reduced pressure to obtain a polythiol compound.

Preparation Example 2. Preparation of a random copolymer composition comprising a pair of isocyanate (NCO) functional groups

50 to 500 parts by weight of a composition A, which is at least two selected from the group consisting of the polythiol, the hydrogenated polybutadiene diol, the polydimethylsiloxane diol, the polypropylene glycol and the polyethylene glycol, prepared in Preparation Example 1, are prepared. Composition A requires sufficient stirring before synthesis, and it is necessary to stir the mixture in an agitator at 50 to 100 rpm. Compound B is then added to Composition A. The compound B is preferably at least one compound selected from the group consisting of 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, 1,5-naphthalene diisocyanate, Diisocyanate, methylene-diphenylmethane diisocyanate, methylene diphenyl diisocyanate (MDI), 1,6-hexane diisocyanate, 1,6-hexane diisocyanate, (Isocyanatomethyl) cyclohexane and 1,3-bis (isocyanatomethyl) cyclohexane, and 1,4-bis (isocyanatomethyl) cyclohexane, which is preferably selected from the group consisting of hexane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, And at least one selected from the group consisting of

Here, the composition A is added to a stirrer capable of controlling the temperature, and then the compound B is added. The stirring speed is 200 to 300 rpm, and the temperature is maintained at 50 to 85 DEG C to carry out the polymerization reaction. At this time, a condensation polymerization catalyst may be further added to accelerate the reaction. When the condensation polymerization catalyst is added, the polymerization reaction time is 2 to 3 hours. Thereby forming a random copolymer composition C comprising a pair of isocyanate (NCO) functional groups.

Production Example 3. Preparation of polyurethane acrylate adhesive composition

Rubber particles were added to the composition obtained in Preparation Example 2 to prepare a waterproof polyurethane acrylate adhesive composition. The rubber particles are preferably contained in an amount of less than 40 parts by weight based on 100 parts by weight of the composition C. If the amount is 40 parts by weight or more, the process speed may be slowed in forming the tape thereafter, and the spray nozzle may be clogged. In addition, the thickness may be increased, which may cause problems in forming a thin tape. And because the cost can rise, the price burden can occur. In addition, a silane treatment may be carried out on the surface of the rubber particles before the rubber particles are introduced, thereby forming a stronger bond with the composition C by forming a plurality of silanol functional groups on the surface. The reaction of mixing the rubber particles proceeds with agitation at a temperature of 60 to 90 DEG C at 200 to 400 rpm.

Production Example 4. Preparation of polyurethane acrylate adhesive composition

An adhesive agent may be added to the composition obtained in Production Example 3 to prepare a waterproof polyurethane acrylate adhesive composition. And 0.5 to 15 parts by weight of the adhesion-imparting agent to 100 parts by weight of the composition C. Composition C and an adhesion-imparting agent are synthesized by stirring in a stirrer at 200 to 500 rpm, and polymerization is carried out at 60 to 90 ° C to prepare an oligomer. The tackifier is selected from the group consisting of hydroxyethyl acrylate (HEA), hydroxypropyl acrylate (HPA), hydroxybutyl acrylate (HBA), and hydroxyethyl methacrylate (2-HEMA) Or more. The surface energy of the waterproof polyurethane acrylate produced at this time may be 1 to 18 mN / m.

Preparation Example 5. Preparation of polyurethane acrylate oligomer

Other processes may be further included to better realize the structure of the random copolymer. The stainless steel high-pressure reactor is purged with nitrogen, purged again with carbon dioxide, and then mixed with 1 mol of the composition A and 1 mol of the compound B and mixed with the organic solvent. 0.5 mmol of di-t-butylal hydrate as a catalyst was added thereto, and carbon dioxide was pressurized to 5 atm. The reaction was continued for 4 hours while maintaining the reaction temperature at about 70 to 80 ° C. When the reaction is completed, the impurities are removed by water, and the remaining water is removed by magnesium anhydride to form a random copolymer composition C containing a pair of isocyanate (NCO) functional groups. In the remaining steps, a polyurethane acrylate adhesive composition is prepared in the same manner as in Production Examples 2 to 4.

Production Example 6. Production of adhesive tape for mobile devices containing polyurethane acrylate oligomer

The adhesive tape comprising the polyurethane acrylate adhesive composition obtained through Production Examples 1 to 5 is formed of a substrate and an adhesive layer comprising the above composition. The adhesive layer can be applied to one side or both sides of the substrate, and the structure thereof is not limited.

The substrate may be selected from the group consisting of polyethersulfone, polyacrylate, polyether imide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulose triacetate and cellulose acetate propionate And at least one of the above-mentioned materials. The base material preferably has a thickness of 50 to 130 占 퐉 and has ductility to facilitate storage, handling and handling in the form of a roll. The tensile strength is preferably 0.3 to 1.5 Kgf / mm ² , more preferably 0.4 to 1.0 Kgf / mm ² , according to ASTM D638, ASTM D882, ISO 527 and KS M3006 standard test standard. In particular, the thinner the substrate, the higher the tensile strength needs to be.

The order of producing the adhesive tape may include a step of preparing a substrate, a step of corona treating the surface of the substrate, a step of forming an adhesive layer on the surface of the substrate, and a step of winding the substrate on which the adhesive layer is formed in a roll form When the adhesive layer is formed on both sides of the base material, the release film may be further included on one side.

[Example]

Examples 1 to 3

In Examples 1 to 3, to verify the performance of the adhesive tape produced in Production Examples 1 to 6, a composition without rubber particles, which was omitted from Production Example 3, was constituted to constitute the thicknesses of the different adhesive layers. In Examples 1 to 3, a polyethylene terephthalate (PET) base having a tensile strength of 0.8 Kgf / mm ^{2 and} a thickness of 50 탆 was used, and the thicknesses of the adhesive layers were 10, 15 and 20 탆, respectively.

Examples 4 to 6

Examples 4 to 6 constituted a composition including rubber particles to verify the performance of the adhesive tape produced through Production Examples 1 to 6, and the thicknesses of the different adhesive layers were configured. In Examples 4 to 6, a polyethylene terephthalate (PET) base having a tensile strength of 0.8 Kgf / mm ^{2 and} a thickness of 50 탆 was used, and the thicknesses of the adhesive layers were 10, 15 and 20 탆, respectively.

Comparative Examples 1 to 5

Comparative Example 1 was a double-sided tape having a thickness of 150 mu m of 3M Company, USA, Comparative Example 2 was a double-sided tape having a thickness of 250 mu m of US 3M Company, Comparative Example 1 was Comparative Example 1, Comparative Example 4 is a double-sided tape having a thickness of 300 mu m, Comparative Example 4 is a double-sided tape having a thickness of 220 mu m, and Comparative Example 5 is a double-sided tape having a thickness of 210 mu m. Respectively. Comparative Example 1 is the double-sided tape having the thinnest thickness with the best performance at present, and is commercially available at about twice the price of Comparative Examples 2 to 5.

Comparative Example 6

Comparative Example 6 was constructed in the same manner as Examples 4 to 6 except that a composition containing no polythiol was prepared.

[Experimental Example]

1. Impact resistance measurement

Examples 1 to 6 and Comparative Examples 1 to 5 are prepared and the window is placed on the printing surface in the assembly jig according to the Dupont test. Examples 1 to 6 and Comparative Examples 1 to 5 were attached to a polycarbonate adherend, and then the specimen was pressed using a compression jig. After pressing, the sample was allowed to stand at room temperature for 72 hours. The specimen was mounted horizontally on a DuPont tester test jig. The weight (mJ) of the sample dropped when the weight dropped was measured. The results are shown in Table 1 below.

2. Measurement of moisture permeability

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared, and the moisture permeability was measured according to ASTM D1653 standard in an environment of 90% humidity. The results are shown in Table 1 below. The unit of moisture permeability is g / m ² day.

3. Tensile strength measurement

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and prepared according to the method of ASTM D882 with a width of 1.0 mm and a length of 15 cm to measure a maximum force when the specimen was pulled up and down at a constant speed to measure the maximum force. The results are shown in Table 1 below.

4. Shear bond strength

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and adhered to a glass substrate. After 30 minutes, the specimen was cut to a length of 15 cm and a width of 1 cm x 1 cm, and the adhesive strength (peel strength) was measured according to ASTM D1002, The results are shown in Table 1 below.

5. Retention

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and the test piece was attached with a bonding area of 2.5 Cm x 2.5 Xm according to ASTM D-3654 standard. Then, the time taken until the tape was detached by applying a load was measured, Are shown in Table 1 below.

6. Heat resistance

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and the test pieces were attached with an adhesive area of 2.5 Cm x 2.5 Cm according to ASTM D4498 standard. Then, when the temperature was raised by applying a load, The results are shown in Table 1 below.

7. Adhesion

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and the test pieces were attached to SUS with a width of 2.5 Cm in accordance with ASTM D-3330 standard, and the force to be measured when forcibly peeled at 90 degrees using a UTM instrument was measured The results are shown in Table 1 below. The unit of force is force / width (Kgf / in).

8. Winding test

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and wound at a constant speed on a rod having a diameter of 2 Cm to inspect the ease of winding. The subjects were evaluated by five experts who performed tape winding for more than 5 years. Scoring was done with 1 being the easiest and 5 being the least.

Impact resistance
(mJ) Moisture permeability
(g / m ² day) The tensile strength
(Kgf / mm ² ) Shear bond strength
(Kgf / cm ² ) retention
(min) Heat resistance
(° C) Adhesion
(Kgf / in) Coiling
exam
(1 to 5) Example 1 1500 8 0.9 6 14000 160 2.6 One Example 2 1700 4 1.0 7 13000 160 2.7 One Example 3 1900 2 1.2 8 10000 160 2.5 3 Example 4 1700 5 1.0 7 14000 160 2.5 2 Example 5 2000 2 1.4 8 13000 160 2.6 2 Example 6 2200 One 1.5 9 10000 160 2.7 3 Comparative Example 1 1500 7 0.9 6 10000 130 2.1 2 Comparative Example 2 1200 6 1.3 6 10000 110 1.5 3 Comparative Example 3 1100 10 0.7 4 8000 110 1.8 2 Comparative Example 4 1000 9 0.8 3 7000 100 1.6 3 Comparative Example 5 1400 17 0.7 4 5000 110 1.9 2 Comparative Example 6 1000 19 0.5 3 4000 95 1.8 2

First, with respect to impact resistance, Examples 1 to 6 are superior to Comparative Examples 1 to 5 in the results of the other Examples than Example 1, compared with Comparative Examples 1 to 5. [ However, since the tape thickness of Example 1 is thinner than that of Comparative Example 1, it can be said that this is a satisfactory result. Further, the thicker the adhesive layer, the more the impact resistance can be improved. The reason for this is that the adhesive layer is composed of a polyurethane acrylate oligomer formed of a random copolymer. Therefore, as the thickness of the adhesive layer becomes thicker, the layer capable of absorbing the impact becomes thicker, so that the impact resistance is improved. Therefore, if the thickness of the substrate is made thinner for the construction of a thin tape, it can be understood that the thickness of the adhesive layer can be increased to compensate for this. The results of Examples 4 to 6, in which rubber particles were included, were better than those of Examples 1 to 3 in which rubber particles were not included. Therefore, it can be confirmed that the rubber particles including the rubber particles for improving the impact resistance effectively act on the present invention.

With respect to the water vapor permeability, it can be seen that the results of the other Examples except for Example 1 are superior to those of the Comparative Examples in comparison with Comparative Examples 1 to 5 in Examples 1 to 6. More specifically, since the thickness of Example 1 was thinner than that of other Examples, the moisture permeability was somewhat higher than that of Comparative Examples 3 to 5, but the waterproofing effect of the adhesive layer was sufficient can confirm. Also, it was confirmed that the thicker the overall thickness, the lower the moisture permeability and the waterproofing is easier to implement.

The tensile strength depends on the thickness of the substrate. Therefore, it can be confirmed that the tensile strength is slightly improved as the adhesive layer is thickened. However, in the case of Comparative Example 6 in which the polythiol is not contained, It was confirmed that the impact resistance is greatly reduced even if the thickness is large.

It is confirmed that the shear bond strength is proportional to the thickness of the adhesive layer and does not greatly affect the thickness of the substrate or the tensile strength of the substrate.

Then, the adhesive holding force is maintained longer as the thickness of the substrate is thinner, and it can be confirmed that the adhesive holding force is maintained longer as the thickness of the adhesive layer is thinner. This is inversely proportional to the weight of the tape, and if the adhesive layer is made thick, the adhesive layer itself is broken and the retention force is weakened. However, it can be seen that superiority is obtained when compared with other comparative examples. Then, the heat resistance was about 30 degrees higher than that of the comparative example.

Adhesion was shown to be non-uniform, but in the case of Examples, superiority to Comparative Example 6 was shown, and as the thickness of the adhesive layer was thicker, it was visually confirmed that the residue remained.

The winding test was confirmed to be influenced by the thickness of the adhesive layer, the thickness of the base material and the tensile strength of the base material, and Examples 4 to 6 in which the rubber particles were included were somewhat inconvenient for winding.

In summary of Examples 1 to 6, it is preferable that the adhesive layer has a thickness of 10 占 퐉 to 20 占 퐉. However, if the adhesive layer is made thicker than this, it is expected to improve the price of the residue at the time of winding and peeling, It is preferable to form an adhesive layer.

Since the adhesive tape for mobile devices according to the embodiment of the present invention can be configured to have a thickness of 80 μm or less in the construction of a double-sided tape, it is possible to provide an adhesive tape satisfying necessary requirements by constituting various thicknesses according to user's demand And it is possible to construct the adhesive layer on both sides or to have a cross section, and the shape of the adhesive layer is not limited.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Accordingly, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims are included in the scope of the present invention will be.

Claims (11)

A polythiol containing at least two functional groups, a polyol having a pair of hydroxyl groups (-OH), at least one selected from the group consisting of hydrogenated polybutadiene diol, polydimethylsiloxane diol, fluorine diol, polypropylene glycol and polyethylene glycol Preparing a composition A comprising at least two types;
Adding a compound B containing isocyanate to the composition A to prepare a random copolymer composition C containing a pair of isocyanate (NCO) functional groups; And
Preparing a polyurethane acrylate oligomer by adding a fluorine monol having one hydroxy group to the composition C; And
And a step of mixing a waterproof polyurethane acrylate oligomer with at least one adhesion imparting agent to prepare a polyurethane acrylate adhesive composition.
The method according to claim 1,
The step of producing the random copolymer composition C comprises:
Preparing 50 to 80 parts by weight of the composition A based on 100 parts by weight of the composition C;
Mixing the composition A in a stirrer at 50 to 100 rpm;
Adding 20 to 50 parts by weight of the compound B to the stirred composition A based on 100 parts by weight of the composition C; And
Adding a polycondensation catalyst to the composition A to which the compound B is added, and conducting a polymerization reaction in an environment of a stirring speed of 200 to 300 rpm and a temperature of 50 to 85; and a polyurethane- A method for producing a resin composition.
3. The method of claim 2,
Wherein the polycondensation catalyst is selected from the group consisting of 2-methyltetraethylenediamide, 1,4-diazabicyclic [2,2,2] octane, bis (2-dimethylaminoethyl) ether, trimethylaminoethylethanolamine, N, , N1, N2-pentamethyldiethylenetriamine, N, N1-dimethylethanolamine, dimethylaminopropylamine, N-ethylmorpholine, N, N-dimethylaminoethylmorpholine, N, N-dimethylcyclohexylamine, Tertiary amines including 2-methyl-2-azanobonate, aprotic salts including quaternary ammonium and carboxylic acid salts of alkali metal, and metal salts such as copper naphthenate, cobalt naphthenate, zinc naphthate, Wherein the polyurethane adhesive resin comprises at least one member selected from the group consisting of organotin compounds including butyltin dilaurate, tristylamine, dibutyltin diacetate, and dibutyltin dimercapto. Of the composition Gt;
The method according to claim 1,
The isocyanate compound,
2,4-tolylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, Methylene-diphenylmethane diisocyanate, methylene diphenyl diisocyanate (MDI), 1,6-hexane diisocyanate, 1,3-xylene diisocyanate, diphenylmethane-4,4-diisocyanate, Selected from the group consisting of isocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane and 1,4-bis (isocyanatomethyl) cyclohexane Wherein the polythiol-containing polyurethane resin is a polyurethane-based resin.
The method according to claim 1,
Wherein the tackifier is selected from the group consisting of hydroxyethyl acrylate (HEA), hydroxypropyl acrylate (HPA), hydroxybutyl acrylate (HBA) and hydroxyethyl methacrylate (2-HEMA) Wherein the polyurethane is at least one selected from the group consisting of polyurethane and polyurethane.
The method according to claim 1,
The fluorine diol may be,
3,5-di (trifluoromethyl) phenyl] methanol, 1,1,1,3-tetrafluorobenzyl alcohol, , 3,3-hexafluoro-2-propanol, 1,1,1,3,3,3-hexafluoro-2-methylisopropanol, hexafluoro-2- (p-tolyl) isopropanol, 4,5 , 5,6,6,6-hexafluoro-4- (trimethyl) -1-hexanol, 4,4,5,5,5-pentafluoropentanol, pentafluoropropionaldehyde, 1H, 1H , 5H-octafluoro-1-pentanol and
Polybutylene terephthalate, polytetrafluoroethylene, polytetrafluoroethylene, and pentafluorobutane-2-ol.
The method according to claim 1,
Wherein the step of preparing the polyurethane acrylate oligomer comprises stirring at 200 to 500 rpm in an environment of a temperature of 60 to 90. The polyurethane-
The method according to claim 1,
Wherein the step of preparing the polyurethane acrylate adhesive composition comprises:
0.5 to 15 parts by weight of the adhesive agent to 100 parts by weight of the waterproof polyurethane acrylate oligomer; And
Wherein the composition is stirred at 200 to 500 rpm in an environment of 60 to 90 by a stirrer to carry out a polymerization reaction.
An adhesive tape for a mobile device, which is produced by using the process for producing a polyurethane resin composition according to any one of claims 1 to 8.
An adhesive tape for a mobile device comprising the adhesive composition for a mobile device according to claim 9,
Wherein the adhesive composition for mobile devices is applied to a base material having a thickness of 20 to 70 mu m by 10 to 60 mu m.
11. The method of claim 10,
Wherein the adhesive tape for mobile devices has an adhesive strength of 2 to 10 kgf / in, a shear adhesive strength of 5 to 15 kgf / cm ² or more, a holding force of 7,000 to 15,000 min, and a heat resistance of 120 to 200 ° C.

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