KR101651316B1 - Resin blend - Google Patents

Abstract

The present invention relates to a resin mixture, a pellet, a method for producing a resin molded article using the same, and a resin molded article. An exemplary resin mixture of the present application can provide a resin molded article whose surface has improved mechanical properties and surface hardness. In addition, when the resin mixture is used, the additional surface coating step can be omitted on the surface of the resin molded article, and the above-mentioned effect can be exhibited, so that the production time and cost can be reduced and the productivity can be increased.

Description

Resin mixture {RESIN BLEND}

The present invention relates to a resin mixture, a pellet, a method for producing a resin molded article using the same, and a resin molded article.

Plastic resins are easy to process, have excellent properties such as tensile strength, elastic modulus and heat resistance, and are used for various purposes such as automobile parts, helmets, electric device parts, spinning machine parts, toys and pipes.

In particular, resins used for household appliances, automobile parts and toys should have excellent surface hardness (Patent Documents 1 to 4).
(Patent Document 1) KR10-2010-0076154 A
(Patent Document 2) KR10-2011-0029515 A
(Patent Document 3) KR10-2011-0078783 A
(Patent Document 4) KR10-2012-0015030A

The present application provides resin mixtures and pellets.

One embodiment of the present application relates to a composition comprising a first resin; And a second resin that is an acrylic polymer having a siloxane unit and a difference in surface energy, melt viscosity, or solubility parameter with the first resin.

Another embodiment of the present application includes a core formed of a first resin; And a cell formed of a second resin that is an acrylic polymer having siloxane units that differ in surface energy, melt viscosity or solubility parameter from the first resin.

Yet another embodiment of the present application

0.1 to 50 parts by weight of a monomer represented by the following formula (1);

R ₃ 5 to 99 parts by weight of a monomer represented by the following Formula 3, which is hydrogen;

R ₃ 0.5 to 90 parts by weight of a monomer represented by the following formula (3), which is an alkyl group having 1 to 4 carbon atoms; And

And 0.01 to 5 parts by weight of a crosslinkable monomer.

[Chemical Formula 1]

Wherein R < ₁ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,

R ₂ Represents a substituent of the following formula (2)

(2)

Wherein R ₅ Represents an alkylene group having 1 to 8 carbon atoms,

R ₆ and R ₇ each independently represent an alkyl group having 1 to 8 carbon atoms,

n is an integer of 1 to 100,

 (3)

Wherein R < ₃ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,

R ₄ Represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, or an alicyclic ring group having 5 to 40 carbon atoms.

Another embodiment of the present application is a method for producing a molten mixture comprising: melting the resin mixture to form a molten mixture; And a step of processing the molten mixture to form a layered structure.

Another embodiment of the present application is a process for producing a molten mixture comprising: melting the pellet to form a molten mixture; And a step of processing the molten mixture to form a layered structure.

Another embodiment of the present application includes a first resin layer; A second resin layer formed on the first resin layer; And an interfacial layer formed between the first resin layer and the second resin layer, wherein the second resin comprises an acrylic polymer having a siloxane unit, wherein the second resin comprises a first resin and a second resin, .

Hereinafter, a resin mixture, a pellet, a method for producing a resin molded article using the resin mixture, and a resin molded product according to a specific embodiment will be described in detail.

As used herein, a "mixture" may be a mixture of two or more different resins. The type of the mixture is not particularly limited, but may include a case where two or more resins are mixed in one matrix, or a case where two or more kinds of pellets are mixed. The resins may each have different physical properties, for example, the physical properties may be surface energy, melt viscosity or solubility parameter.

"Melt processing" means the process of melting a resin mixture at a temperature above the melting temperature (Tm) to form a melt blend and forming the desired molded article using the melt mixture, Molding, extrusion molding, blow molding, transfer molding, film blowing, fiber spinning, car-rendering thermoforming or foam molding.

The term "resin molded product" means a product or a pellet formed from a resin mixture. The resin molded product is not particularly limited, and examples thereof include automobile parts, electronic device parts, machine parts, functional films, have.

"Layer separation" may mean that the layer formed by substantially one resin is located or arranged on a layer formed by substantially different resins. A layer formed by substantially one resin may mean that one kind of resin does not form a sea-island structure but exists continuously over one layer. This solution structure means that the phase separated resin is partially distributed in the whole resin mixture. In addition, "substantially formed" may mean that there is only one resin in one layer or that one resin is rich.

In one example, the resin mixture can be layered by melt processing. Thus, it is possible to produce a resin molded article whose surface has a specific function, for example, a high hardness function, without a separate process such as coating and plating. Therefore, the resin molded article can have improved mechanical properties and surface characteristics, and when the resin mixture is used, the production cost and time of the resin molded article can be reduced.

The layer separation of the resin mixture may be caused by a difference in physical properties between the first resin and the second resin and / or a molecular weight distribution of the second resin. Here, the physical properties may be, for example, surface energy, melt viscosity or solubility parameter. Although a mixture of resins containing two kinds of resins is described in this specification, it will be apparent to those skilled in the art that three or more kinds of resins having different physical properties may be mixed and subjected to melt processing.

According to one embodiment, the resin mixture may comprise a first resin and a second resin having a surface energy difference from 0.1 to 35 mN / m at 25 占 폚 with said first resin.

The surface energy difference between the first resin and the second resin is 0.1 to 35 mN / m, 0.1 to 30 mN / m, 0.1 to 20 mN / m, 0.1 to 15 mN / m, 0.1 to 7 mN / , 1 to 35 mN / m, 1 to 30 mN / m, 2 to 20 mN / m, and 3 to 15 mN / m. When the first and second resins having a surface energy difference in this range are used, the first resin and the second resin can not easily peel off, and the second resin can easily move to the surface, and the layer separation phenomenon can easily occur.

The resin mixture of the first resin and the second resin having a surface energy difference of 0.1 to 35 mN / m at 25 DEG C can be layered by melt processing. As an example, when the resin mixture of the first resin and the second resin is melt-processed and exposed to the air, the first resin and the second resin can be separated by a difference in hydrophobicity. In particular, since the second resin having a lower surface energy than the first resin has a high hydrophobicity, it can move in contact with air to form a second resin layer positioned on the air side. In addition, the first resin can be placed on the opposite side of the air while contacting the second resin. Thus, layer separation occurs between the first resin and the second resin of the resin mixture.

The resin mixture may be separated into two or more layers. As one example, the resin mixture comprising the first resin and the second resin may have three layers, for example, a second resin layer and a second resin layer, when two opposing faces of the melt- / First resin layer / second resin layer. On the other hand, when only one side of the melt-processed resin mixture is exposed to air, the resin mixture can be layered into two layers, for example, a second resin layer / first resin layer. Further, when the resin mixture comprising the first resin, the second resin and the third resin having the difference in surface energy is melt-processed, the melt-processed resin mixture has five layers, for example, the third resin layer / 2 resin layer / first resin layer / second resin layer / third resin layer. Further, when all surfaces of the melt-processed resin mixture are exposed to air, the resin mixture may be layered in all directions to form a core-shell structure.

According to another embodiment, the resin mixture comprises a first resin; And a second resin having a melt viscosity difference of 0.1 to 3000 pa * s with the first resin at a shear rate of 100 to 1000 s < ^-1 > and a processing temperature of the resin mixture.

The difference between the melt viscosity of the first resin and the second resin is from 100 to 1000 s ^-1 shear rate and the processing temperature of the resin mixture of from 0.1 to 3000 pa * s, 1 to 2000 pa * s, 1 to 1000 pa * s, 1 to 500 pa * s, 50 to 500 pa * s, 100 to 500 pa * s, 200 to 500 pa * s, or 250 to 500 pa * s. In the case of using the first and second resins having a difference in melt viscosity in this range, the first resin and the second resin can not easily peel off, and the second resin can easily move to the surface and the layer separation phenomenon can easily occur.

The resin mixture of the first resin and the second resin having a melt viscosity difference of 0.1 to 3000 pa * s at a shear rate of 100 to 1000 s < ^-1 > and a processing temperature of the resin mixture is melt- Can be separated. As one example, when the resin mixture of the first resin and the second resin is melt-processed and exposed to the air, the first resin and the second resin can be separated by the fluidity difference. In particular, since the second resin having a lower melt viscosity than the first resin has high fluidity, it can move in contact with air to form a second resin layer located on the air side. In addition, the first resin can be placed on the opposite side of the air while contacting the second resin. Thus, layer separation occurs between the first resin and the second resin of the resin mixture.

The melt viscosity can be measured by capillary flow, which means the shear viscosity (pa * s) according to the specific processing temperature and shear rate (/ s).

The 'shear rate' refers to the shear rate applied when the resin mixture is processed, and the shear rate can be controlled between 100 and 1000 s ^-1 , depending on the processing method. Control of the shear rate according to the processing method will be apparent to those skilled in the art.

The 'processing temperature' means a temperature at which the resin mixture is processed. For example, when the resin mixture is used for melt processing such as extrusion or injection, it means a temperature applied to the melt processing step. The processing temperature can be controlled according to the resin used for melt processing such as extrusion or injection molding. For example, in the case of a resin mixture comprising a first resin of ABS resin and a second resin obtained from an acrylic monomer, the processing temperature may be 210 to 270 캜.

According to another embodiment of the present invention, there is provided a resin composition comprising: a first resin; And a second resin having a solubility parameter difference of 0.001 to 10.0 (J / cm ³ ) ^1/2 with the first resin at 25 ° C.

The first resin and the solubility parameter of the second resin (Solubility Parameter) is a difference in the 25 ℃ 0.001 to ^{10.0 (J / cm 3) 1/2} , 0.01 to ^{5.0 (J / cm 3) 1/2} , 0.01 to 3.0 ( J / cm ^{3) 1/2,} 0.01 to ^{2.0 (J / cm 3) 1/2} , 0.1 to ^{1.0 (J / cm 3) 1/2} , 0.1 to ^{10.0 (J / cm 3) 1/2} , 3.0 to 10.0 (J / cm ³⁾ may be ^one-half, from 5.0 to 10.0 (J / cm ^{3) 1/2,} or from 3.0 to ^{8.0 (J / cm 3) 1/2} . These solubility parameters are inherent characteristics of the resin showing the dissolution possibility according to the polarity of each resin molecule, and the solubility parameter for each resin is generally known. When the solubility parameter difference is ^less than 0.001 (J / cm ³ ) ^1/2 , the first resin and the second resin are easily miscible and the layer separation phenomenon is difficult to occur easily. When the solubility parameter difference is 10.0 (J / cm < ³ >) ^1/2 , the first resin and the second resin can not be bonded and can be peeled off.

The upper limit and / or lower limit of the solubility parameter difference may be any value within a range of 0.001 to 10.0 (J / cm < ³ &^gt;) ^1/2 and may depend on the physical properties of the first resin. In particular, when the first resin is used as a base resin and the second resin is used as a functional resin for improving the surface characteristics of the first resin, the second resin has a solubility parameter difference between the first resin and the second resin of 25 DEG C (J / cm < ³ >)< ^1/2 > As an example, the difference in solubility parameter can be selected in consideration of the miscibility of the second resin in the molten mixture of the first resin and the second resin.

At 25 캜, the resin mixture of the first resin and the second resin having a solubility parameter difference of 0.001 to 10.0 (J / cm ³ ) ^1/2 can be layered due to the difference in solubility parameter after melt processing. As one example, when the resin mixture of the first resin and the second resin is melt-processed and exposed to the air, the first resin and the second resin can be separated by the degree of miscibility. In particular, the second resin having a solubility parameter difference of from 0.001 to 10 (J / cm ³ ) ^1/2 at 25 ° C relative to the first resin may not be miscible with the first resin. Therefore, if the second resin additionally has a lower surface tension or lower melt viscosity than the first resin, the second resin can move to contact the air to form a second resin layer located on the air side. In addition, the first resin can be placed on the opposite side of the air while contacting the second resin. Thus, layer separation occurs between the first resin and the second resin of the resin mixture.

In the resin mixture, the first resin is a resin which mainly determines the physical properties of a desired molded article, and may be selected according to the type of the desired molded article and the process conditions to be used. As the first resin, a general synthetic resin can be used without any particular limitation.

Examples of the first resin include styrene resins such as ABS (acrylonitrile butadiene styrene) resin, polystyrene resin, acrylonitrile styrene acrylate (ASA) resin and styrene-butadiene-styrene block copolymer; A polyolefin-based resin such as a high-density polyethylene-based resin, a low-density polyethylene-based resin, or a polypropylene-based resin; A thermoplastic elastomer such as an ester-based thermoplastic elastomer or an olefin-based thermoplastic elastomer; Polyoxyalkylene resins such as polyoxymethylene resins and polyoxyethylene resins; Polyester resins such as polyethylene terephthalate resin or polybutylene terephthalate resin; Polyvinyl chloride resins; Polycarbonate resin; Polyphenylene sulfide type resin; Vinyl alcohol type resin; Polyamide based resin; Acrylate resins; Engineering plastics; Copolymers thereof, and mixtures thereof. As the engineering plastics, plastics exhibiting excellent mechanical and thermal properties can be used. For example, polyether ketone, polysulfone, and polyimide may be used as engineering plastics. In one example, the first resin may be a copolymer obtained by polymerizing acrylonitrile, butadiene, styrene, and acrylic monomers.

The second resin in the resin mixture may be an acrylic polymer having siloxane units.

The term siloxane units as used herein refers to the following formula (4).

[Chemical Formula 4]

Wherein R represents alkyl having 1 to 24 carbon atoms, alkenyl having 2 to 24 carbon atoms, alkoxy having 1 to 24 carbon atoms, or aryl having 6 to 40 carbon atoms,

Specifically, R represents alkyl having 1 to 12 carbon atoms, alkenyl having 2 to 12 carbon atoms, alkoxy having 1 to 12 carbon atoms, or aryl having 6 to 24 carbon atoms.

In one example, the acrylic polymer is a polymer of a monomer mixture comprising a monomer of the formula (1) and a monomer of the formula (3)

[Chemical Formula 1]

Wherein R < ₁ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,

R ₂ Represents a substituent of the following formula (2)

(2)

Wherein R ₅ Represents an alkylene group having 1 to 8 carbon atoms,

R ₆ and R ₇ each independently represent an alkyl group having 1 to 8 carbon atoms,

n is an integer of 1 to 100,

(3)

Wherein R < ₃ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,

R ₄ Represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, or an alicyclic ring group having 5 to 40 carbon atoms.

In one embodiment, the monomer mixture may comprise from 0.1 to 50 parts by weight, such as from 1 to 30 parts by weight, from 2 to 45 parts by weight, and from 5 to 15 parts by weight, based on 100 parts by weight of the total monomers, .

The monomer of formula (1) may be added in an amount of 0.1 to 50 parts by weight, 1 to 40 parts by weight, 2 to 30 parts by weight, and 3 to 20 parts by weight, which functions to lower the surface energy of the second resin.

When the amount of the monomer represented by the formula (1) is less than 0.1 parts by weight, there is a problem that the layer separation efficiency decreases. When the amount exceeds 50 parts by weight, peeling between the first resin and the second resin occurs.

In an embodiment, the monomer of formula (1) is a compound of formula (5).

[Chemical Formula 5]

Wherein R is hydrogen, a methyl group, or an ethyl group, and n is an integer of 1 to 100.

The monomer of formula (3) may be a monomer forming the main polymerization unit of the acrylic polymer. The monomer of the above formula (3) may be used in combination of two or more monomers each of which is different from the substituent R ₃ and the substituent R ₄ .

In one embodiment, the alkyl (meth) acrylate wherein the substituent R ₄ is an alkyl group in the above formula (3) includes, for example, alkyl of 1 to 40 carbon atoms, alkyl of 1 to 30 carbon atoms, alkyl of 1 to 20 carbon atoms, Alkyl of 1 to 10 carbon atoms, alkyl of 1 to 5 carbon atoms, alkyl of 1 to 3 carbon atoms, or alkyl (meth) acrylate of 1 to 2 carbon atoms. For example, the content of the alkyl (meth) acrylate may be in the range of 50 to 97 parts by weight, 60 to 95 parts by weight, 65 to 90 parts by weight, 50 to 80 parts by weight, 50 to 80 parts by weight based on 100 parts by weight of the total monomers contained in the monomer mixture 50 to 70 parts by weight, 55 to 80 parts by weight, 60 to 80 parts by weight, 55 to 75 parts by weight or 60 to 70 parts by weight.

In one example, the monomer mixture for polymerizing the acrylic polymer may further comprise a monomer having a bulky functional group. A linear polymer formed from a monomer mixture comprising monomers having bulky functional groups may increase the hydrodynamic volume to provide a second resin having a lower melt viscosity.

In one example, the monomer having a bulky functional group may be an alkyl (meth) acrylate. The monomer mixture may thus be, for example, an alkyl (meth) acrylate forming the predominant polymerization unit of the acrylic polymer described above; And (meth) acrylates having a bulky alkyl group. Examples of the (meth) acrylate having a bulky alkyl group include a vinyl group having 3 to 20 carbon atoms, 3 to 12 carbon atoms, 3 to 6 carbon atoms, 5 to 20 carbon atoms, 7 to 20 carbon atoms, 10 to 20 carbon atoms, Alkyl (meth) acrylate of 20 to 20 carbon atoms; Or an alicyclic (meth) acrylate having 5 to 40 carbon atoms, 5 to 25 carbon atoms, 5 to 16 carbon atoms, 6 to 40 carbon atoms, 10 to 40 carbon atoms, 12 to 40 carbon atoms or 16 to 40 carbon atoms, And the like. Specific examples of the alkyl (meth) acrylate having 3 to 20 carbon atoms include isopropyl (meth) acrylate, isobutyl (meth) acrylate, tertiary butyl (meth) Examples of the alicyclic (meth) acrylate having 5 to 40 carbon atoms include cyclohexyl (meth) acrylate or isobornyl (meth) acrylate, And the like.

The content of (meth) acrylate having such a bulky alkyl group can be appropriately controlled in accordance with the melt viscosity and purpose of use of the second resin. For example, the content of the (meth) acrylate having a bulky alkyl group may be 10 to 40 parts by weight, 15 to 40 parts by weight, 20 to 40 parts by weight, 10 to 35 parts by weight based on 100 parts by weight of the total monomers contained in the monomer mixture, 10 to 30 parts by weight, 15 to 35 parts by weight or 20 to 30 parts by weight.

In another example, aromatic (meth) acrylate may be used as the monomer having a bulky functional group. Examples of the aromatic (meth) acrylate include aromatic (meth) acrylates having 6 to 40 carbon atoms, 6 to 25 carbon atoms, and 6 to 16 carbon atoms. Examples of the aromatic (meth) acrylate having 6 to 40 carbon atoms include naphthyl (meth) acrylate, phenyl (meth) acrylate, anthracenyl (meth) Acrylate or benzyl (meth) acrylate can be used.

The content of the aromatic (meth) acrylate can be appropriately controlled in accordance with the intended use of the second resin such as (meth) acrylate having the above-mentioned bulky alkyl group. For example, the content of the aromatic (meth) acrylate may be 10 to 40 parts by weight, 15 to 40 parts by weight, 20 to 40 parts by weight, 10 to 35 parts by weight 10 to 10 parts by weight based on 100 parts by weight of the total monomers contained in the monomer mixture, 30 parts by weight, 15 to 35 parts by weight or 20 to 30 parts by weight.

Examples of the crosslinkable monomer include an acrylic monomer having a carboxyl group, an acrylic monomer having a hydroxyl group, an acrylic monomer having an amino group, or an acrylic monomer having an anhydride group.

Specific examples of the acrylic monomer having a reactive functional group include (meth) acrylic acid, 2- (meth) acryloyloxyacetic acid, 3- (meth) acryloyloxypropyl acid, 4- (meth) acryloyloxybutyl Acrylic monomers having a carboxyl group such as an acid, (meth) acrylic acid dimer, itaconic acid or maleic acid; (Meth) acrylamide or N-substituted (meth) acrylamide; Hydroxy-C _{1 - 14} alkyl (meth) acrylate monomer having a hydroxyl group such as acrylate; Or an acrylic monomer having an anhydride group such as maleic anhydride.

The content of the crosslinkable monomer may be controlled depending on the content of the reactive polyolefin to be introduced into the resin. For example, in order to apply the polyolefin resin to the surface layer of the resin molded article to exhibit excellent scratch resistance, the acrylic monomer having a reactive functional group is added in an amount of 3 to 50 parts by weight, preferably 5 to 50 parts by weight, based on 100 parts by weight of the total monomers contained in the monomer mixture, 40 parts by weight, and 10 parts by weight to 35 parts by weight.

In embodiments, the monomer mixture comprises

0.1 to 50 parts by weight of the monomer of Formula 1;

5 to 99 parts by weight of a monomer represented by the formula (3) wherein R ₃ is hydrogen;

R ₃ is an alkyl group having 1 to 4 carbon atoms, 0.5 to 90 parts by weight of a monomer of Formula 3; And

And 0.01 to 5 parts by weight of a crosslinkable monomer.

The monomer of Formula 3 wherein R ₃ is hydrogen gives a function of lowering the surface energy of the second resin and is contained in an amount of 0.1 to 50 parts by weight, 1 to 40 parts by weight, 2 to 30 parts by weight, and 3 to 20 parts by weight .

When the amount of the monomer represented by the formula (1) is less than 0.1 parts by weight, there is a problem that the layer separation efficiency decreases. When the amount exceeds 50 parts by weight, peeling occurs between the first resin and the second resin.

R ₃ is an alkyl group having 1 to 4 carbon atoms, and the monomer of the formula (3) functions to lower the surface energy of the second resin. The monomer is used in an amount of 0.1 to 50 parts by weight, 1 to 40 parts by weight, 2 to 30 parts by weight, By weight.

When the amount of the monomer represented by the formula (1) is less than 0.1 parts by weight, there is a problem that the layer separation efficiency decreases. When the amount exceeds 50 parts by weight, peeling occurs between the first resin and the second resin.

The monomer mixture comprising the above-described monomers can generally provide an acrylic polymer in a manner that produces a resin through polymerization of the monomers. For example, the monomer mixture may be polymerized by a method such as bulk polymerization, solution polymerization, suspension polymerization, or emulsion polymerization to provide a linear polymer.

In one example, a method of making an acrylic polymer includes dispersing a dispersant in a solvent; Dispersing the above-mentioned monomer mixture in the solvent; Adding an additive such as a chain transfer agent and / or an initiator to the solvent and mixing them; And a polymerization step of reacting at a temperature of 40 DEG C or higher. Herein, the order of each step can be changed arbitrarily, and it is also possible to carry out two or more steps to one step.

The solvent can be used without limitation as long as it is a medium known to be routinely usable for preparing polymers. As such a solvent, for example, methyl ethyl ketone, ethanol, methyl isobutyl ketone, or distilled water may be used, or two or more kinds thereof may be mixed and used.

Examples of the dispersing agent that can be added to the solvent include organic dispersing agents such as polyvinyl alcohol, polyolin-maleic acid or cellulose; Or an inorganic dispersant such as tricalcium phosphate.

Examples of the chain transfer agent include alkyl mercaptans such as n-butylmercaptan, n-dodecylmercaptan, tertiary dodecylmercaptan or isopropylmercaptan; Arylmercaptan such as phenylmercaptan, naphthylmercaptan or benzylmercaptan; Halogen compounds such as carbon tetrachloride; Alpha-methylstyrene dimer, and alpha-ethyl styrene dimer.

Examples of the initiator include peroxides such as octanoyl peroxide, decanoyl peroxide and lauroyl peroxide; azo compounds such as azobisisobutyronitrile and azobis- (2,4-dimethyl) -valeronitrile; Azo compounds and the like.

In addition, an additive conventionally used in the polymer industry may be used in the production of the acrylic polymer, and a conventionally performed process may be further performed.

The present application is also directed to a composition comprising 0.1 to 50 parts by weight of a monomer of Formula 1;

R ₃ 5 to 99 parts by weight of a monomer represented by the following Formula 3, which is hydrogen;

R ₃ 0.5 to 90 parts by weight of a monomer represented by the following formula (3), which is an alkyl group having 1 to 4 carbon atoms; And

And 0.01 to 5 parts by weight of a crosslinkable monomer.

[Chemical Formula 1]

Wherein R < ₁ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,

R ₂ Represents a substituent of the following formula (2)

(2)

Wherein R ₅ Represents an alkylene group having 1 to 8 carbon atoms,

R ₆ and R ₇ each independently represent an alkyl group having 1 to 8 carbon atoms,

n is an integer of 1 to 100,

 (3)

Wherein R < ₃ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,

R ₄ Represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, or an alicyclic ring group having 5 to 40 carbon atoms.

In one example, the weight average molecular weight (Mw) of the second resin can be from about 5,000 to about 200,000. In another example, the weight average molecular weight of the inorganic particle-containing resin is from 10,000 to 200,000, from 150,000 to 200,000, from 20,000 to 200,000, from 0.5 million to 180,000, from 0.5 million to 150,000, from 0.5 million to 120,000, From about 1 million to about 180,000, from about 150,000 to about 150,000, or from about 20,000 to about 120,000. When a second resin having a weight average molecular weight in this range is applied to, for example, a resin mixture for melt processing, the second resin has an appropriate fluidity so that layer separation can easily occur.

Further, in one example, the molecular weight distribution (PDI) of the second resin can be controlled in the range of 1 to 2.5, 1 to 2.2, 1.5 to 2.5, or 1.5 to 2.2. When the second resin having a molecular weight distribution in this range is applied to, for example, a resin mixture for melt processing, the content of the low molecular weight compound and / or the high molecular weight material which impedes the occurrence of layer separation in the second resin is reduced, Can happen.

In one example, the resin mixture may comprise 0.1 to 50 parts by weight of the second resin based on 100 parts by weight of the first resin. Further, in another example, the resin mixture may include 1 to 30 parts by weight, 1 to 20 parts by weight or 1 to 15 parts by weight based on 100 parts by weight of the first resin. When the first resin and the second resin are included in such a content, the layer separation phenomenon can be induced, and the content of the second resin, which is relatively high compared to the first resin, can be appropriately controlled to provide an economical resin mixture.

The resin mixture described above can be made into pellets by extrusion. In the pellet produced using the resin mixture, the first resin forms a core and the second resin separates from the first resin to form a shell.

According to one embodiment, the pellet comprises a core formed of a first resin; And a cell formed of a second resin that is an acrylic polymer having siloxane units that differ in surface energy, melt viscosity or solubility parameter from the first resin.

In addition, as described above, the first resin and the second resin may have different surface energy, melt viscosity, or solubility parameters. For example, the first resin and the second resin may have a surface energy difference of from 0.1 to 35 mN / m at 25 占 폚; Or a melt viscosity difference of from 0.1 to 3000 pa * s at a shear rate of from 100 to 1000 s < ^-1 > and a processing temperature of the pellet.

The types and physical properties of the first resin and the second resin have already been described in detail, and the detailed description thereof will be omitted.

On the other hand, the above-mentioned resin mixture or pellet can be melt-processed to provide a resin molded article having a layer separation structure.

According to one embodiment, there is provided a method for producing a melt blend, comprising: melting a resin mixture to form a melt blend; And a step of processing the molten mixture to form a layered structure.

As described above, due to the difference in physical properties between the first resin and the second resin, a layer separation phenomenon may occur during the melt-processing of the resin mixture. Due to such layer separation phenomenon, The effect of selectively coating the surface of the molded article can be obtained.

In particular, when an acrylic polymer having a siloxane unit as the second resin is used, an acrylic polymer having a siloxane unit having a relatively low surface energy or a melt viscosity in a melt processing step is placed on the surface of the resin molded article, This improved resin molded article can be provided.

The step of melt-working the resin mixture can be carried out under shear stress. For example, the step of melt-working can be carried out by an extrusion and / or an injection-molding method.

Further, in the step of melt-processing the resin mixture, the applied temperature may be different depending on the kind of the first resin and the second resin used. For example, when a styrene resin is used as the first resin and an acrylic resin is used as the second resin, the melt processing temperature can be controlled to about 210 to 270 캜.

The method may further include the step of curing the resulting product obtained by melt-processing the resin mixture, that is, the melt-processed product of the resin mixture. The curing may be, for example, thermal curing or UV curing. The resin molded article may further be subjected to chemical or physical treatment.

In one example, the manufacturing method of the resin molded article may further include the step of producing the second resin before the step of melting the resin mixture to form the molten mixture. The second resin can impart a specific function, for example, high hardness, to the surface layer of the resin molded article. The contents related to the production of the second resin have already been described, and a detailed description thereof will be omitted.

According to another embodiment, a method of manufacturing a resin molded article includes melting a pellet to form a molten mixture; And processing the molten mixture to form a layered structure.

In one example, the pellets may be prepared by melt-processing the above-mentioned resin mixture, such as extrusion. For example, when a resin mixture comprising the first resin and the second resin is extruded, a second resin having a higher hydrophobicity than the first resin moves to contact with the air to form a shell of the pellet, 1 < / RTI > resin may be located at the center of the pellet to form a core. The pellets thus produced can be made into a resin molded article by melt processing such as injection molding. However, the present invention is not limited thereto. In another example, the resin mixture may be directly molded into a resin molded product by melt processing such as injection molding or the like.

On the other hand, according to another embodiment, the resin molded article has a first resin layer, a second resin layer formed on the first resin layer, and an interface layer formed between the first resin layer and the second resin layer . ≪ / RTI > The interfacial layer may comprise first and second resins, and the second resin may comprise an acrylic polymer having siloxane units.

A resin molded product produced from a resin mixture comprising a specific first resin and the second resin having a difference in physical properties from the first resin is obtained by, for example, a method in which a first resin layer is located inside and a second resin layer is a resin Or may be a layered structure formed on the surface of the molded article.

Particularly, when an acrylic polymer having the above-mentioned acyloxane unit is used as the second resin, the molded article can further improve the surface hardness.

The 'first resin layer' mainly includes the first resin, determines the physical properties of the molded article, and can be located inside the resin molded article. The 'second resin layer' mainly contains the second resin, and can be positioned outside the resin molded product to give a certain function to the surface of the molded product.

The details of the first resin and the second resin have already been described above, and a description of the related contents will be omitted.

The resin molded article may include an interface layer formed between the first resin layer and the second resin layer and including a mixture of the first resin and the second resin. The interface layer may be formed between the layered first resin layer and the second resin layer to serve as an interface, and may include a mixture of the first resin and the second resin. The first resin and the second resin may be physically or chemically bonded to each other, and the first resin layer and the second resin layer may be bonded to each other through the mixture.

The resin molded article may be formed in such a structure that the first resin layer and the second resin layer are separated by the interface layer and the second resin layer is exposed to the outside. For example, the molded article may include the first resin layer; Interfacial layer; And the second resin layer may be sequentially stacked, and may be a structure in which the interface and the second resin are laminated on the upper and lower ends of the first resin. The resin molded article may include a structure in which the interface and the second resin layer sequentially surround a first resin layer having various shapes, for example, spherical, circular, polyhedral, sheet, or the like.

Layer separation phenomenon appearing in the resin molded article appears to be due to the production of resin molded articles by applying specific first and second resins having different physical properties. Examples of such different physical properties include surface energy or melt viscosity. The details of the difference in physical properties are as described above.

In one example, the first resin layer, the interface layer and the second resin layer can be confirmed by SEM after etching the specimen using a THF vapor after the low-temperature impact test. To measure the thickness of each layer, the specimen is cut with a diamond knife using a microtoming machine to obtain a smooth cross-section, and then a smooth cross-section is etched using a solution that can selectively melt the second resin compared to the first resin. The cross-sectional area of the etched section differs depending on the content of the first resin and the second resin. When the cross section is observed at 45 degrees from the surface using SEM, the first resin layer, the second resin layer, The interface layer and the surface can be observed, and the thickness of each layer can be measured. In one example, a 1,2-dichloroethane solution (10 vol%, in EtOH) was used as a solution for selectively dissolving the second resin, but this is illustrative only and is not intended to limit the solubility of the second resin Solution is not particularly limited, and those skilled in the art can appropriately select and apply the solution according to the type and composition of the second resin.

The interfacial layer may comprise from 1 to 95%, from 10 to 95%, from 20 to 95%, from 30 to 95%, from 40 to 95%, from 50 to 95%, from 60 to 95% of the total thickness of the second resin layer and interfacial layer And may have a thickness of 60 to 90%. If the interface layer has a thickness of 0.01 to 95% of the total thickness of the second resin layer and the interface layer, the interfacial bonding force between the first resin layer and the second resin layer is excellent so that the peeling of both layers does not occur, Can be greatly improved. On the other hand, if the interface layer is too thin as compared with the second resin layer, the bonding force between the first resin layer and the second resin layer is low, so that peeling of both layers may occur. If the interface layer is too thick, The effect of improving the characteristics may be insignificant.

The second resin layer may have a thickness of 0.01 to 30%, 0.01 to 20%, 0.01 to 10%, 0.01 to 5%, 0.01 to 3%, 0.01 to 1%, or 0.01 to 0.1% . When the thickness of the second resin layer is too small, the surface properties of the molded article can be sufficiently improved. [0051] [52] If the thickness of the second resin layer is too large, the mechanical properties of the functional resin itself may be reflected in the resin molded article, and the mechanical properties of the first resin may be changed.

In the resin molded article having the above-described structure, the component of the first resin layer can be detected by the infrared ray spectroscope (IR) at the surface of the second resin layer.

In this case, the surface of the second resin layer means a surface exposed to the outside (for example, air) rather than to the first resin layer.

The details of the first resin, the second resin, and the difference in physical properties between the first resin and the second resin have already been described above, and a description of the relevant contents will be omitted. In this specification, a difference in physical properties between the first resin and the second resin may mean a difference in physical properties between the first resin and the second resin or a difference in physical properties between the first resin layer and the second resin layer.

In one example, the resin molded article can be used for providing automobile parts, helmets, electric appliance parts, spinning machine parts, toys, pipes, and the like.

An exemplary resin mixture of the present application can provide a resin molded article whose surface has improved mechanical properties and surface hardness. In addition, when the resin mixture is used, the additional surface coating step can be omitted on the surface of the resin molded article, and the above-mentioned effect can be exhibited, so that the production time and cost can be reduced and the productivity can be increased.

Fig. 1 is a SEM photograph showing a layered sectional shape of the resin molded article produced in Example 1. Fig.
Fig. 2 is a SEM photograph of a sectional shape of the resin molded article produced in Comparative Example 2. Fig.

Hereinafter, the resin mixture will be described in detail by way of examples and comparative examples, but the range of the resin mixture is not limited by the examples given below.

The physical properties in the following examples and comparative examples were evaluated in the following manner.

1. Molecular weight distribution ( PDI ) And a weight average molecular weight ( Mw )

The molecular weight distribution was measured using GPC (Gel Permeation Chromatography). The conditions were as follows.

- Appliance: 1200 series from Agilent Technologies

- Column: Using 2 PLgel mixed B from Polymer laboratories

- Solvent: THF

- Column temperature: 40 degrees

- Sample concentration: 1 mg / mL, 100 L injection

Standard: Polystyrene (Mp: 3900000, 723000, 316500, 52200, 31400, 7200, 3940, 485)

The analysis program was a ChemStation of Agilent Technologies. The weight average molecular weight (Mw) and the number average molecular weight (Mn) were determined by GPC and the molecular weight distribution (PDI) was calculated from the weight average molecular weight / number average molecular weight Respectively.

2. Measurement of surface energy

Based on the Owens-Wendt-Rabel-Kaelble method, the surface energy was measured using a Drop Shape Analyzer (DSA100 from KRUSS).

Specifically, the resin obtained in Example or Comparative Example was dissolved in methyl ethyl ketone solvent in an amount of 15% by weight, followed by bar coating on LCD glass. The coated LCD glass was preliminarily dried in an oven at 60 DEG C for 2 minutes and dried in an oven at 90 DEG C for 1 minute.

After the drying (or curing), deionized water and diiodomethane were dropped 10 times on the coated surface to obtain the average value of the contact angle, and the surface energy was obtained by substituting the values into the Owens-Wendt-Rabel-Kaelble method.

3. Measurement of melt viscosity

The melt viscosity was measured using a capillary rheometer (Capillary Rheometer 1501, Gottfert).

Specifically, a capillary die was attached to a barrel, and then the resin obtained in Example or Comparative Example was divided into three portions. Shear viscosity (pa * s) was measured at a processing temperature of 240 ° C according to a shear rate of 100 to 1000 s ^-1 .

4. Pencil hardness measurement experiment

The surface pencil hardness of the specimens obtained in Examples and Comparative Examples was measured under a constant load of 500 g using a pencil hardness tester (Chungbuk Tech). A standard pencil (manufactured by Mitsubishi) was changed from 6B to 9H while maintaining an angle of 45 degrees, and scratches were applied to observe the rate of change of the surface (ASTM 3363-74). The measurement result is the average value of the results of five repeated experiments.

5. Strength measurement experiment

The strengths of the specimens obtained in Examples and Comparative Examples were measured according to ASTM D256. Specifically, the energy (kg * cm / cm) required to break the V-shaped groove of the pendulum was measured by using an impact tester (Impact 104, Tinius Olsen). The 1/8 "and 1/4" specimens were each measured five times and the average value was determined.

6. Observing cross-sectional shape

After the low-temperature impact test of the specimens of Examples and Comparative Examples, the fractured surface was etched by using dichloroethane vapor (or plasma) and the layered cross-sectional shape was measured using SEM (Hitachi, model: S-4800) Were observed.

In order to measure the thicknesses of the layered first resin layer, the second resin layer and the interface layer, the specimens of the following examples and comparative examples were cut with a diamond knife using a microtoming machine (Leica EM FC6) at -120 ° C to obtain a smooth cross section Lt; / RTI > The section of the specimen containing the microtomed smooth section is immersed in a 1,2-dichloroethane solution (10 vol%, in EtOH), etched for 10 seconds, and washed with distilled water. The portion of the etched cross-section is different according to the content of the first resin and the second resin, and the degree of melting can be observed and can be observed using an SEM. That is, when the cross section is 45 degrees from the surface, the first resin layer, the second resin layer, and the interface layer can be observed due to the difference in shade, and the thicknesses of the first resin layer, the second resin layer, and the interface layer can be measured.

7. Infrared spectroscopy ( IR )

UMA-600 infrared microscope equipped with a Varian FTS-7000 spectrometer (Varian, USA) and MCT (mercury cadmium telluride) detector was used. Spectral measurement and data processing were performed using Win-IR PRO 3.4 software (Varian, USA) , Conditions are as follows.

- Germanium (Ge) ATR crystal with a refractive index of 4.0

- ATR (attenuated total reflection) IR spectra of this method by the scan from 4000cm ^-1 to spectral resolution and 16 scans of 8cm ^-1 to 600cm ^-1

- Internal reference band: Carbonyl group of acrylate (C = O str., ~ 1725 cm ^-1 )

- inherent component of the first resin: butadiene compound [C = C str. (~ 1630 cm ^-1 ) or = CH out-of-plane vib. (~ 970 cm ^-1 )

The peak intensity ratio [I _BD (C = C) / I _A (C = O)] and [I _BD (out-of-plane) / I _A Five runs were performed in different regions, and mean values and standard deviations were calculated.

Manufacturing example  - Preparation of the second resin

Manufacturing example  One

A reactor of a four-necked flask equipped with a stirrer, a thermometer, a nitrogen inlet, and a circulating condenser was prepared and 1476 g of deionized water (DDI water) was charged into a 3 L vessel. The inside temperature of the reactor was heated to 80 ° C. , 20 g of methyl methacrylate, 75 g of phenyl methacrylate, 15 g of methacryloxypropyl terminated polydimethylsiloxane (PDMS, MW 420), 6 g of allyl methacrylate and 60 g of 3% sodium lauryl sulfate were added to the reactor and stirred for 15 minutes Respectively. Thereafter, 200 g of a 3% potassium persulfate solution was added and stirred for 120 minutes. An emulsion of the polymer having an average particle size of 120 nm after the reaction was prepared, at which conversion rate was measured as 99%.

The emulsion was added dropwise to a 1% magnesium sulfate solution preheated to 80 캜 and stirred to prepare a powdery solid. The powder was filtered, washed with distilled water at 70 ° C three times, and dried in a vacuum oven at 80 ° C for 24 hours to prepare a functional resin.

Manufacturing example  2

A reactor of a four-necked flask equipped with a stirrer, a thermometer, a nitrogen inlet, and a circulating condenser was prepared and 1960 g of deionized water (DDI water) was charged into a 3 L vessel. The internal temperature of the reactor was heated to 80 , 204 g of methyl methacrylate, 75 g of phenyl methacrylate, 15 g of methacryloxypropyl terminated polydimethylsiloxane (PDMS, MW 420) and 6 g of allyl methacrylate were added to the reactor and stirred for 15 minutes. Thereafter, 300 g of a 3% potassium persulfate solution was added and stirred for 120 minutes. After the reaction, an emulsion of a polymer having an average particle size of 500 nm was prepared, at which conversion rate was measured to be 99%.

The emulsion was added dropwise to a 1% magnesium sulfate solution preheated to 80 캜 and stirred to prepare a powdery solid. The powder was filtered, washed with distilled water at 70 ° C three times, and dried in a vacuum oven at 80 ° C for 24 hours to prepare a functional resin.

Example  One

90 parts by weight of a first resin (a thermoplastic resin consisting of 60 parts by weight of methyl methacrylate, 7 parts by weight of acrylonitrile, 10 parts by weight of butadiene and 23 parts by weight of styrene) and 10 parts by weight of the second resin prepared in Preparation Example 1 And then extruded at a temperature of 240 DEG C in a twin-screw extruder (Leistritz) to obtain a pellet. These pellets were then injected by an EC100? 30 extruder (manufactured by ENGEL) at a temperature of 240 占 폚 to prepare specimen of molded resin articles having a thickness of 3200 占 퐉.

A cross-sectional SEM photograph of the specimen is shown in Fig.

In the molded product specimen, a layer separation phenomenon occurred which separated into the first resin layer, the second resin layer, and the interface layer having a thickness of 10 mu m between the first resin layer and the second resin layer.

The surface energy of the second resin layer was measured at 31 mN / m and the difference in surface energy between the first resin layer and the second resin layer was measured at 12 mN / m.

Further, the intensities of the 1/8 "and 1/4" specimens were measured respectively at 9, and the pencil hardness of the specimens was measured at 2H.

Example  2

A specimen was prepared in the same manner as in Example 1, except that 10 parts by weight of the second resin obtained in Preparation Example 2 was mixed with 90 parts by weight of the same first resin as used in Example 1.

In the molded product specimen, a layer separation phenomenon occurred in which the first resin layer, the second resin layer, and the interface layer having a thickness of 15 탆 between the first resin layer and the second resin layer were separated.

The surface energy of the second resin layer was measured at 29 mN / m and the difference in surface energy between the first resin layer and the second resin layer was measured at 14 mN / m.

Also, the intensities for the 1/8 "and 1/4" specimens were measured to be 6 and 4, respectively, and the pencil hardness of the specimens was measured to be 2H.

Comparative Example  One

100 parts by weight of the first resin used in Example 1 was dried in an oven and injected at a temperature of 240 DEG C in an EC100? 30 extruder (manufactured by ENGEL) to prepare a molded resin product specimen.

No layer separation phenomenon was observed in the specimen.

The surface energy of the first resin layer was measured to be 43 mN / m.

Further, the intensities for the 1/8 "and 1/4" specimens were measured as 10, respectively, and the pencil hardness of the specimens was measured as F. [

Comparative Example  2

A specimen was prepared in the same manner as in Example 1, except that 10 parts by weight of PMMA (LGMMA IF870) as the second resin was mixed with 90 parts by weight of the same first resin as used in Example 1.

In the molded product specimen, layer separation did not occur.

The surface energy of the second resin layer was measured to be 43 mN / m, and there was no difference in surface energy between the first resin layer and the second resin layer.

Also, the intensities for the 1/8 "and 1/4" specimens were each measured at 5, and the pencil hardness of the specimens was measured as H.

Comparative Example  3

A specimen was prepared in the same manner as in Example 1, except that 10 parts by weight of PMMA (Sekisui XX-110BQ) as the second resin was mixed with 90 parts by weight of the same first resin as used in Example 1.

In the molded product specimen, layer separation did not occur.

The intensities for the 1/8 "and 1/4" specimens were also measured as 8 and 4, respectively, and the pencil hardness of the specimens was measured as HB.

Claims (20)

A first resin; And
A second resin that is an acrylic polymer having siloxane units and having a difference in surface energy, melt viscosity, or solubility parameter from the first resin,
Wherein the acrylic polymer is a polymer of a monomer mixture comprising a monomer of the formula (1) and a monomer of the formula (3)
[Chemical Formula 1]

Wherein R ₁ represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₂ represents a substituent of the following formula (2)
(2)

Wherein R ₅ represents an alkylene group having 1 to 8 carbon atoms,
R ₆ and R ₇ each independently represent an alkyl group having 1 to 8 carbon atoms,
n is an integer of 1 to 100,
(3)

Wherein R ₃ represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₄ represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, or an alicyclic ring group having 5 to 40 carbon atoms. The resin mixture according to claim 1, wherein the second resin has a surface energy difference of 0.1 to 35 mN / m with the first resin at 25 占 폚. The resin mixture according to claim 1, wherein the first resin which is an ABS resin and the second resin which is obtained from an acrylic monomer have a shear rate of 100 to 1000 s < ^-1 > and a difference in melt viscosity of 0.1 to 3000 pa * s at 210 to 270 DEG C. The resin mixture according to claim 1, wherein the second resin has a solubility parameter difference of 0.001 to 10.0 (J / cm ³ ) ^1/2 with the first resin at 25 ° C. The resin composition according to claim 1, wherein the first resin is selected from the group consisting of a styrene resin, a polyolefin resin, a thermoplastic elastomer, a polyoxyalkylene resin, a polyester resin, a polyvinyl chloride resin, a polycarbonate resin, Vinyl alcohol resin, polyamide resin, acrylate resin, copolymer thereof, or a mixture thereof. delete The resin mixture according to claim 1, wherein the monomer mixture comprises 0.1 to 50 parts by weight of the monomer of formula (1) based on 100 parts by weight of the total monomers. The composition of claim 1, wherein the monomer mixture comprises
0.1 to 50 parts by weight of a monomer of the formula (1);
5 to 99 parts by weight of a monomer of formula (3) wherein R ₃ is hydrogen;
R ₃ is an alkyl group having 1 to 4 carbon atoms, 0.5 to 90 parts by weight of a monomer of formula (3); And
0.01 to 5 parts by weight of a crosslinkable monomer. The resin mixture according to claim 1, wherein the second resin has a molecular weight distribution of 1 to 2.5. The resin mixture according to claim 1, wherein the second resin has a weight average molecular weight of 5,000 to 200,000. The resin mixture according to claim 1, comprising 0.1 to 50 parts by weight of a second resin based on 100 parts by weight of the first resin. 0.1 to 50 parts by weight of a monomer represented by the following formula (1);
R ₃ 5 to 99 parts by weight of a monomer represented by the following Formula 3, which is hydrogen;
R ₃ 0.5 to 90 parts by weight of a monomer represented by the following formula (3), which is an alkyl group having 1 to 4 carbon atoms; And
Acrylic polymer which is a polymer of a monomer mixture comprising 0.01 to 5 parts by weight of a crosslinkable monomer:
[Chemical Formula 1]

Wherein R < ₁ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₂ Represents a substituent of the following formula (2)
(2)

Wherein R ₅ Represents an alkylene group having 1 to 8 carbon atoms,
R ₆ and R ₇ each independently represent an alkyl group having 1 to 8 carbon atoms,
n is an integer of 1 to 100,
(3)

Wherein R < ₃ > Represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₄ Represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, or an alicyclic ring group having 5 to 40 carbon atoms. A core formed of a first resin; And a cell formed of a second resin that is an acrylic polymer having a siloxane unit with a difference in surface energy, melt viscosity or solubility parameter from the first resin,
Wherein the acrylic polymer is a polymer of a monomer mixture comprising a monomer of Formula 1 and a monomer of Formula 3:
[Chemical Formula 1]

Wherein R ₁ represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₂ represents a substituent of the following formula (2)
(2)

Wherein R ₅ represents an alkylene group having 1 to 8 carbon atoms,
R ₆ and R ₇ each independently represent an alkyl group having 1 to 8 carbon atoms,
n is an integer of 1 to 100,
(3)

Wherein R ₃ represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₄ represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, or an alicyclic ring group having 5 to 40 carbon atoms. Melting the resin mixture of claim 1 to form a molten mixture; And processing the molten mixture to form a layered structure. 15. The method according to claim 14, wherein the melting and processing is performed under shear stress. 15. The method of manufacturing a resin molded article according to claim 14, further comprising a step of curing the layered structure of the resin mixture. The method for producing a molded resin product according to claim 16, wherein the curing is thermosetting or UV curing. Melting the pellet of claim 13 to form a molten mixture; And processing the molten mixture to form a layered structure. A first resin layer comprising a first resin; A second resin layer formed on the first resin layer and including a second resin; And an interface layer formed between the first resin layer and the second resin layer, wherein the second resin is an acrylic polymer having a siloxane unit,
Wherein the acrylic polymer is a polymer of a mixture of monomers comprising a monomer of the following formula (1) and a monomer of the following formula (3):
[Chemical Formula 1]

Wherein R ₁ represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₂ represents a substituent of the following formula (2)
(2)

Wherein R ₅ represents an alkylene group having 1 to 8 carbon atoms,
R ₆ and R ₇ each independently represent an alkyl group having 1 to 8 carbon atoms,
n is an integer of 1 to 100,
(3)

Wherein R ₃ represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
R ₄ represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, or an alicyclic ring group having 5 to 40 carbon atoms. The resin molded article according to claim 19, wherein the first resin layer component is detected by an infrared spectroscope on the surface of the second resin layer.

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