JP2007191500A - Adhesive composition for wall surface construction and method of construction of wall surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive composition for wall surface construction which is water-based and may be used with application on one side when used in bonding a building material on a wall surface, does not practically require open time, allows relocation after bonding and is easy to wipe off, and a method of fabrication of a wall surface. <P>SOLUTION: The adhesive composition for wall surface construction contains an emulsion of an acrylic resin with a glass transition temperature of ≤-20°C. The adhesive composition for wall surface construction may also contain 1-50 pts.wt. of the solid of an emulsion of a urethane-based resin to 100 pts.wt. of the solid of the acrylic resin emulsion. A method of construction of a wall surface using these adhesive compositions is presented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an adhesive composition for wall surface construction and a construction method that can be used when constructing a building material on a wall surface.

Conventionally, when a building material for wall surfaces such as a decorative plywood and a melamine resin decorative board is applied to a base, a rubber-based solvent-type adhesive, a modified silicone-based adhesive, or the like has been used. Since the rubber-based solvent-type adhesive has a strong contact property, it develops a strength that can withstand the weight of the wall surface building material itself immediately after bonding. Moreover, it is excellent in adherence suitability and can be used for a wide range of substrates and building materials. Since the modified silicone adhesive has elasticity, there is an advantage that the building material has a buffering action against deviation from the ground when it undergoes dimensional change due to moisture absorption / release or temperature change, or when warping occurs. .
JP 2004-323589 A

  However, rubber-based solvent-type adhesives use organic solvents, and need to be applied to both the base and building materials, which increases the number of work steps. There are problems such as a step of waiting until the contact property develops, that is, it is necessary to take an open time. In the modified silicone adhesive, the initial adhesive strength is not sufficient, and it is necessary to use double-sided tape for temporary fixing, which increases the number of work steps, and when the surface material is thin, the adhesive or double-sided tape applied with beads is used. There was an appearance problem that marks appeared on the surface. In both cases, if an adhesive is accidentally attached to the surface of the building material during construction, it is necessary to use an organic solvent for wiping. I couldn't. Further, once the bonding is performed, there is a problem that the construction is difficult because fine adjustment such as alignment cannot be performed.

  Therefore, the problem of the present invention is that when constructing a building material on a wall surface, it can be used even in single-sided application, and it is not necessary to take an open time substantially, positioning after bonding is possible, and wiping is easy. It is providing the wall surface construction method of an adhesive composition and building materials.

  The invention of claim 1 is an adhesive composition for wall construction comprising an acrylic resin emulsion having a glass transition temperature (Tg) of −20 ° C. or lower. Due to the tackiness of acrylic resin emulsions with a Tg of -20 ° C or less, water is absorbed into the substrate even after a short period of time after the adhesive is applied to the substrate with water absorption properties such as plywood and plasterboard. Since the initial adhesive force (tack) that can hold the building material is obtained by being volatilized in the air, the building material can be bonded without substantially taking an open time. When the temperature exceeds −20 ° C., the adhesive strength is inferior and sufficient initial adhesive strength cannot be obtained. Therefore, an open time is required or temporary fixing is required, and the problem of the present invention cannot be solved.

  The invention according to claim 2 is the adhesive composition for wall construction according to claim 1, comprising 1 to 50 parts by weight of the solid content of the urethane resin emulsion with respect to 100 parts by weight of the solid content of the acrylic resin emulsion. is there. By using 1 to 50 parts by weight of urethane resin emulsion, adhesion to various materials is improved, and heat is applied not only to materials such as wood, paper, metal, calcium, mortar, impregnated paper, and melamine resin decorative board, but also to the back surface. A hard-to-adhere building material that is formed by laminating and integrating plastic resin paper or thermoplastic coated paper can also be bonded. When the urethane resin emulsion exceeds 50 parts by weight, the initial adhesive strength is lowered, which is not preferable.

  Invention of Claim 3 is the adhesive composition for wall surface construction of Claim 1 or 2 which contains 50-500 weight part of fillers with respect to 100 weight part of solid content of acrylic resin emulsion. By containing 50 to 500 parts by weight of the filler, the cohesive force of the adhesive can be improved and the final strength can be improved.

  The invention according to claim 4 comprises 10 to 300 parts by weight of the solid content of the tackifier with respect to 100 parts by weight of the solid content of the acrylic resin emulsion. It is an adhesive composition. By containing 10 to 300 parts by weight of the tackifier, the cohesive force of the adhesive can be improved and the final strength can be improved.

  The invention according to claim 5 is the adhesive composition for wall construction according to any one of claims 1 to 4, wherein the TI value is 2 to 7. When the TI value is 2 to 7, the elongation at the time of applying the adhesive to the base is good, and since there is no problem of the dripping of the adhesive after the application, good application workability can be obtained. Further, after bonding the building materials, a holding force against stress such as weight and rebound of the building materials can be obtained, and as a result, the initial adhesive force can be improved. The TI value is a ratio of the viscosity under a low shearing force to the viscosity under a high shearing force, and the former can be regarded as a state after application of the adhesive, and the latter is a state during application of the adhesive. If the TI value is large, the viscosity is relatively high after application of the adhesive, so that it is difficult to sag.

  Invention of Claim 6 is 60-85% of solid content, It is an adhesive composition for wall surface construction in any one of Claims 1-4. When the solid content is 60 to 85%, the initial adhesive force can be developed more quickly after the adhesive is applied.

  Invention of Claim 7 is a method of constructing a building material on a wall surface using the adhesive composition for wall surface construction in any one of Claims 1-5. For example, one side is applied to the base side of a porous material such as plywood or plaster board, and the adhesive composition is applied using an applicator such as a squeeze iron, various rollers, or a brush. Next, building materials are pasted together without having to take open time. By this method, the building material can be easily applied to the wall surface without performing troublesome processes such as double-sided application of the adhesive, open time, and combined use of double-sided tape.

  Since the adhesive composition according to the present invention has excellent initial adhesive strength, it can be used in one-sided application with an aqueous system and one liquid, and it is not necessary to take an open time substantially, and alignment after bonding is possible. It is easy to wipe off. Moreover, the construction material using this adhesive can safely and easily construct a building material on a wall surface.

  Hereinafter, the present invention will be described in detail. The method for producing the acrylic resin emulsion used in the present invention is not particularly limited. For example, a method of emulsion polymerization of monomers in the presence of water or an emulsifier, a method of polymerizing monomers in an appropriate solvent, and then using an emulsifier to Examples thereof include a method of transferring to a phase, and emulsion polymerization is preferred. In emulsion polymerization, a method in which the entire amount of monomers is charged into a reaction vessel and polymerized in a batch, a method in which monomers are continuously or intermittently added to the reaction vessel, a method in which monomers are pre-emulsified with an emulsifier, etc. can be used. . In addition, a seed polymerization method in which polymerization is performed in the presence of the seed emulsion by polymerizing a part of the monomer to form seed particles or adding a seed emulsion separately prepared, or two or more monomer compositions. It is also possible to use a core-shell polymerization method in which a core-shell structure is formed by dividing into multiple stages.

  The Tg of the acrylic resin emulsion needs to be −20 ° C. or lower, and preferably −30 ° C. or lower. Moreover, it is preferable from the surface of superposition | polymerization stability and storage stability to make a carboxyl group-containing monomer into 0.1-10 parts in 100 parts of total amounts of a monomer.

  Examples of the urethane resin emulsion include a polyester urethane resin emulsion, a polyether urethane resin emulsion, and a polycarbonate urethane resin emulsion. Examples of polyester-based urethane resin emulsions include hydran HW-301, HW-310, HW-311, HW-333, HW-340, HW-350, HW-920, HW-940, HW-950, AP-20, AP-30, AP-40, AP-60LM, ECOS-3000 (manufactured by Dainippon Ink Industries, Ltd.), Uprene UXA-3004, UXA-3005 (manufactured by Sanyo Chemical Industries, Ltd.) and the like. Examples of the polyether-based urethane resin emulsion include Permarin UA-150, UA-200 (manufactured by Sanyo Chemical Industries, Ltd.), Yodosol RX-7, RD-6, RD-7 (manufactured by Nippon SC Co., Ltd.), and the like. Examples of the polycarbonate urethane resin emulsion include Permarin UA-300, UA-310 (manufactured by Sanyo Kasei Kogyo Co., Ltd.), and Yodosol RD-20 (manufactured by Nippon SC Co., Ltd.). The compounding amount of the urethane resin emulsion is preferably 1 to 50 parts by weight, more preferably 2 to 30 parts by weight based on 100 parts by weight of the acrylic resin emulsion based on the solid content.

  The tackifying resin constituting the tackifier is not particularly limited, but gum rosin, tall rosin, wood rosin, disproportionated rosin, polymerized rosin, esters with these polyhydric alcohols or hydrogenated / dehydrogenated products thereof Such as rosin resins, terpene resins, hydrocarbon-modified terpene resins, terpene resins such as hydrogenated products, terpene phenolic resins, terpene phenolic resins such as hydrogenated products, petroleum resins, and hydrogenated products thereof Petroleum-based resins such as Among them, the polymerized rosin resin is suitably used as a resin having an excellent tackifying effect and good heat resistance and moist heat resistance.

  These tackifying resins are particularly preferably used as aqueous emulsions, and as a means to make aqueous resin emulsions, the emulsifier and soft water are added after dissolving the tackifier resin in a solvent such as benzene, toluene, etc. The method of removing the solvent under reduced pressure after emulsification using, or mixing a small amount of solvent such as benzene, toluene or the like so that the softening point of the resin is about 90 ° C. or less, followed by kneading the emulsifier, Add hot water gradually and emulsify the emulsion by phase inversion emulsification, then remove the solvent under reduced pressure or use it as it is, or knead the emulsifier by raising the temperature above the softening point of the resin in an autoclave. Hot water is gradually added, followed by phase inversion emulsification and emulsification, and any method may be used.

  These tackifier resins may be used alone or in combination of two or more. In addition, by using a tackifying resin emulsion having a softening point of around 100 ° C., the film strength after curing of the adhesive composition can be improved and the final adhesive strength can be improved. The compounding amount of the tackifier is preferably 10 to 300 parts by weight, more preferably 20 to 200 parts by weight, based on 100 parts by weight of the solid content of the acrylic resin emulsion. If it is less than 10 parts, the tackiness may be reduced, the initial adhesive force may be reduced, or the cohesive force may be reduced and the final strength may be reduced. If it exceeds 300 parts, the adhesive force is improved, but the adhesive may become brittle.

Examples of fillers that can be used include kaolin, clay, talc, calcium carbonate, silica, calcium sulfate, corn starch, tapioca starch, wheat flour, and eggplant powder. Of these, calcium carbonate is preferable, and calcium carbonate having a specific surface area of 2000 to 30000 cm ² / g is more preferable. If it is less than 2000 cm ² / g, the drying property is slow, it takes time to develop the initial strength, the cohesive strength is lowered, and the final strength and heat resistance may be lowered. When it exceeds 30000 cm < ² > / g, since a viscosity becomes high too much, workability | operativity may fall. The effect of using the filler includes adjusting the viscosity and structural viscosity of the adhesive composition to facilitate the application of the adhesive composition. In addition, the initial adhesive force can be increased by increasing the non-volatile content. As a compounding quantity, it is preferable to make a filler into 50-500 weight part with respect to 100 weight part of acrylic resin emulsion on the basis of solid content, and it is more preferable to set it as 80-400 weight part. If it is less than 50 parts, the solid content becomes low, so that the drying property is slow, and it takes time to develop the initial strength, or the cohesive strength is lowered and the final strength and heat resistance may be lowered. If it exceeds 500 parts, the viscosity becomes too high and workability may be reduced.

粘度が３０Ｐａ・ｓ未満の場合、又はＴＩ値が２未満の場合、接着剤組成物を下地に塗布したときに垂れやすくなる。粘度が３００Ｐａ・ｓを超える場合、又はＴＩ値が７を超える場合、接着剤を下地に塗布する作業性が低下する。 As for the properties of the adhesive composition, the viscosity at 2 rpm measured using a BH type rotational viscometer at 23 ° C. is preferably 30 to 300 Pa · s in accordance with JISK7117-1, and 50 to 250 Pa · s. It is more preferable that Moreover, it is preferable that it is TI value 2-7. The TI value is a ratio of the viscosity value of 2 rpm measured at 23 ° C. using a BH type rotational viscometer and the viscosity value of 20 rpm, and is calculated by the following equation. The TI value is a ratio of the viscosity under a low shearing force to the viscosity under a high shearing force, and the former can be regarded as a state after application of the adhesive, and the latter is a state during application of the adhesive.

When the viscosity is less than 30 Pa · s, or when the TI value is less than 2, the adhesive composition tends to sag when applied to the base. When the viscosity exceeds 300 Pa · s, or when the TI value exceeds 7, workability of applying the adhesive to the base is lowered.

  The nonvolatile content of the adhesive composition is preferably 60% to 85%, and more preferably 65% to 80%. If it is less than 60%, the adhesive force immediately after application of the adhesive composition is not sufficient, and it is necessary to take open time. When it exceeds 85%, the viscosity of the adhesive becomes too high, and the coating workability may deteriorate.

  In addition, various compounding materials can be added according to each use aspect. Such compounding materials include thickeners, dispersants, leveling agents, water-proofing agents, preservatives, antifoaming agents, surfactants, bactericides, plasticizers, pH adjusters, color pigments, rust inhibitors, and aging. Examples of the inhibitor, the flame retardant, and the crosslinking agent include isocyanate compounds, epoxy compounds, silane coupling agents, oxazoline compounds, and metal oxides.

  In particular, when a preferable viscosity and TI value cannot be obtained with the above composition, it is preferable to adjust the viscosity and TI value using a thickener. As the thickener, there are those that impart thixotropic properties at the time of blending and those that impart Newtonian properties, and can be appropriately selected according to the properties before thickening.

  The application surface of the adhesive composition according to the present invention is not limited to one side or both sides, but in particular, one side is applied to the base side of a porous material such as plywood or plaster board, and application such as kushimekote, various rollers, brushes, etc. Tools can be used.

The coating amount of the adhesive composition is preferably from 100 to 600 / ^{m 2,} more preferably 150~550g / ^{m 2,} more preferably 200-500 g / ^{m 2.} If it is less than 100 g / m ² , the coating amount is insufficient, and the adhesive strength is not sufficiently exhibited, which is not preferable. Moreover, even if it applies 600 g / m < ² > or more, since the improvement of adhesive force is not seen and there exists a problem that drying becomes slow, it is unpreferable.

  After applying the adhesive composition to the groundwork, the building material can be applied to the wall surface substantially without taking any open time because the initial adhesive force that can hold the building material is developed even in a short time until the building material is pasted together. it can. In addition, although the initial adhesive force that can support the building material is expressed immediately after construction, it is not completely dry, so if it is just after, it is possible to shift the building material while aligning it on the wall. .

  Furthermore, even when the adhesive composition is mistakenly adhered to the surface of the building material when constructing the building material, it can be easily removed by wiping with, for example, a waste cloth containing water.

Hereinafter, the present invention will be further described with reference to examples and comparative examples.
In addition, about a mixing | blending, a weight part is described as a part. Of course, the present invention is not limited to the examples.
Example of blending adhesive for wall surface construction As acrylic resin emulsion, ECX-100-13 (non-volatile content 58%, Tg-45 ° C., manufactured by Ganz Kasei Co., Ltd.), Ultrazol B-800 (non-volatile content 55%, Tg- 10 ° C., manufactured by Ganz Kasei Co., Ltd., trade name), urethane resin emulsion, Permarin UA-150 (non-volatile content 30%, Sanyo Kasei Kogyo Co., Ltd. trade name), and tackifier, KNS120 (polymerized rosin) Emulsion, non-volatile content 50%, softening point 120 ° C., Arakawa Chemical Co., Ltd., trade name), as a filler, Whiteon SB (calcium carbonate, specific surface area 10000 cm ² / g, Shiraishi Kogyo Co., trade name) As a thickener, Latecol D (trade name, manufactured by BASF Japan Ltd.), Accusol 880 (Rohm and Ha) Scan Japan KK, blended product name), Table 1, to obtain an adhesive composition described in Table 2.

Adhesive performance evaluation method Applying 300 g / m ^{2 of the} adhesive composition to a 12 mm lauan plywood using a cricket, and a melamine resin decorative board described in Japanese Patent Application No. 2005-273596 (thickness 0.8 mm, Aika Industry Co., Ltd., JQ -147) were bonded together and pressed by applying a hand roller twice. After curing in a 23 ° C. atmosphere for 1 day, it is cured in a 40 ° C. atmosphere for 3 days, and then in a 40 ° C., 90% RH atmosphere for 3 days. A plane tensile test was performed using a Kenken-type adhesive strength tester to measure the adhesive strength and observe the fracture state. An asterisk (*) is added when the fracture state is plywood breakage, and there is no mark when the fracture is cohesive.
300 g / m ^{2 of the} adhesive composition was applied to a dry plaster board (thickness 12 mm, manufactured by Yoshino Gypsum Co., Ltd.) using Kushimekote, and the time until drying was evaluated.
◎: Within 15 minutes ○: Over 15 minutes to within 25 minutes △: Over 25 minutes to within 40 minutes ×: Over 40 minutes Holding power (initial adhesive strength)
300 g / m ^{2 of the} adhesive composition was applied to a plaster board (thickness 12 mm, manufactured by Yoshino Gypsum Co., Ltd.) using a kushimekote, and a melamine resin decorative board described in Japanese Patent Application No. 2005-273596 (thickness 0.8 mm, Aika Industry) Co., Ltd., JQ-147) was bonded together at an open time of 0 minutes, and the state was observed by leaning vertically.
◎: No floating ○: Partially lifted but settled by pressing again after 5 minutes △: Partially lifted but settled by pressing again after 10 minutes ×: Partially lifted It does not fit even after pressing again after 10 minutes. Note that the float in this evaluation method is partial, and the entire building material can be held without falling off the vertical surface. In addition, since the floated portion can come into contact with air, the time until re-clamping is substantially open time, and the adhesive force of the floated portion is improved, so that it is settled by re-clamping.

About the adhesive composition of Examples 1-16, the intensity | strength of 0.46 N / mm < ² > or more was obtained in adhesive performance evaluation, and dryness and holding power were evaluation more than (triangle | delta).

In Comparative Example 1, the drying property, but retention was good, only obtained strength of 0.28 N / mm ² in the adhesion performance evaluation were below 0.4 N / mm ² as a reference.

  Since the adhesive composition according to the present invention is excellent in adhesive strength and cohesive strength, it can be used in single-sided application with an aqueous system and one liquid, and it is not necessary to take open time, and positioning after bonding is possible. Since wiping is easy, building materials can be safely and easily constructed on the wall.

Claims (7)

  An adhesive composition for wall construction comprising an acrylic resin emulsion having a glass transition temperature of -20 ° C or lower.   The adhesive composition for wall surface construction according to claim 1, comprising 1 to 50 parts by weight of the solid content of the urethane resin emulsion with respect to 100 parts by weight of the solid content of the acrylic resin emulsion.   The adhesive composition for wall surface construction according to claim 1 or 2, comprising 50 to 500 parts by weight of a filler with respect to 100 parts by weight of a solid content of the acrylic resin emulsion.   The adhesive composition for wall surface construction according to any one of claims 1 to 3, comprising 10 to 300 parts by weight of a solid content of a tackifier with respect to 100 parts by weight of a solid content of an acrylic resin emulsion.   TI value is 2-7, The adhesive composition for wall surface construction in any one of Claims 1-4.   Solid content is 60 to 85%, The adhesive composition for wall surface construction in any one of Claims 1-5.   A method for constructing a building material on a wall surface using the adhesive composition for wall surface construction according to claim 1.