JP6583024B2 - Urethane resin composition for paint - Google Patents

Description

  The present invention relates to a urethane resin composition for paints containing a polyisocyanate, a specific polyol, and a matting agent, and a touch-sensitive paint using the composition.

  Polyurethane resin is excellent in various physical properties such as wear resistance, flexibility, flexibility, flexibility, workability, adhesion, chemical resistance, etc., and is also suitable for various processing methods. It is widely used as a resin component for coating materials, inks, adhesives, paints, etc. for clothing, furniture / home appliances, household goods, architecture / civil engineering, and automobile parts, or as various molded articles such as films and sheets. Polyether polyols and polyester polyols have been used as the polyol component to be reacted with isocyanate. Furthermore, in recent years, it has been proposed to use polycarbonate diol due to high demands such as hydrolysis resistance, heat resistance, abrasion resistance, and chemical resistance (Patent Document 1). However, on the other hand, it is hard to respond to the demand for a tactile paint having a soft touch, and it is also proposed to use a polycarbonate diol having a specific structure in order to obtain durability and a soft touch ( Patent Document 2).

  However, it has been difficult to achieve both soft touch and durability against UV absorbers and insect repellents contained in cosmetics.

JP2007-238797 JP2009-280665A

  The present invention has been made in view of the background art as described above, and includes a urethane resin composition for paints and a composition for touch-sensitive paints that have both chemical resistance to ultraviolet absorbers, durability and a soft texture. Is to provide.

  As a result of intensive studies to solve the above problems, the present inventors have found that a polyol compound (A) and a polyisocyanate compound (B) containing at least a polyfunctional polyester polyol and having a number of hydroxyl functional groups within a specific range. It has been found that the above-mentioned problems can be solved by using a composition for touch-sensitive paint obtained by reaction, and the present invention has been completed.

  That is, the present invention includes the following embodiments.

  [1] A polyurethane resin composition comprising a polyol (A) containing a polycarbonate diol (a1) and a polyester polyol (a2) having 3 or more hydroxyl functional groups, a polyisocyanate (B), and a matting agent (C). (A) has an average hydroxyl functional group number of 2.3 to 3.5, a hydroxyl value of 70 to 285 mgKOH / g, and a mass ratio of (a1) to (a2) of (a1) / (a2) = 75 / A urethane resin composition for paint, which is 25 to 55/45.

  [2] Polyol (A) containing a polycarbonate diol (a1), a polyester polyol (a2) having 3 or more hydroxyl functional groups, and a polyester polyol (a3) having 2 or more and less than 3 hydroxyl functional groups, polyisocyanate (B) In the polyurethane resin composition containing the matting agent (C), the average hydroxyl functional group number of the polyol (A) is 2.3 to 3.5, the hydroxyl value is 70 to 285 mgKOH / g, and (a1) and ( (A2) + (a3)) The mass ratio of (a1) / ((a2) + (a3)) = 75/25 to 55/45 is a urethane resin composition for paints.

  [3] The urethane for coatings according to [1] or [2] above, wherein the polyester polyols (a2) and (a3) are polyester polyols obtained by ring-opening addition polymerization of a cyclic ester compound. Resin composition.

  [4] The urethane resin composition for paints according to any one of [1] to [3] above, wherein the polyisocyanate (B) contains a trimer of an aliphatic isocyanate.

  [5] The urethane resin composition for paint according to any one of [1] to [4], wherein the matting agent (C) contains at least one selected from the group consisting of inorganic fine powder and / or organic fine powder. object.

  [6] The urethane resin composition for paints according to any one of [1] to [4] above, wherein the matting agent (C) is silica.

  [7] A touch-sensitive paint including the urethane resin composition for paint according to any one of [1] to [6].

  The urethane resin composition for paints of the present invention can form a coating film that achieves both chemical resistance and soft touch.

  Hereinafter, the present invention will be described in detail.

  The present invention relates to a polyol (A) and a polyisocyanate (B) comprising a polycarbonate diol (a1), a polyester polyol (a2) having a hydroxyl functional group number of 3 or more, and a polyester polyol (a3) having a hydroxyl functional group number of 2 or more and less than 3. ) And a matting agent (C), the polyol (A) has an average hydroxyl functional group number of 2.3 to 3.5, an average hydroxyl value of 70 to 285 mgKOH / g, and (a1) And the mass ratio of (a2) is (a1) / (a2) = 75/25 to 55/45, or the mass ratio of (a1) and ((a2) + (a3)) is (a1) / ((a2) + (A3)) = 75/25 to 55/45.

  In the present invention, the polyol (A) includes a polycarbonate diol (a1) and a polyester polyol (a2), or a polycarbonate diol (a1), a polyester polyol (a2) and (a3).

  Polycarbonate diol (a1) is dialkyl carbonates such as dimethyl carbonate and diethyl carbonate, alkylene carbonates such as ethylene carbonate and propylene carbonate, diphenyl carbonate, dinaphthyl carbonate, dianthryl carbonate, diphenanthryl carbonate, diindanyl carbonate, It can be obtained by reaction of a carbonate such as a diaryl carbonate such as tetrahydronaphthyl carbonate with a glycol.

  Examples of the glycol include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1, 6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 3-methyl-1,5-pentanediol, 3,3-dimethylolheptane, diethylene glycol, dipropylene glycol, neopentyl glycol, diethylene glycol, Dipropylene glycol, cyclohexane-1,4-diol, cyclohexane-1,4-dimethanol, dimer acid diol, ethylene oxide or propylene oxide adduct of bisphenol A, bis (β-hydroxyethyl) benzene, xylylene glycol, Glycerin, trimethylolpropane, selected from low-molecular polyol groups such as pentaerythritol. These may be used alone or in combination of two or more.

  As the polycarbonate diol (a1) in the present invention, an alkylene carbonate is used as the carbonate, and a glycol is preferably reacted with 1,6-hexanediol from the viewpoint of availability and chemical resistance.

  The polyester polyol (a2) in the present invention is a polyfunctional one having 3 or more hydroxyl functional groups. In particular, a polyester polyol obtained from a polyol containing a polyhydric alcohol and a dicarboxylic acid component, or a lactone using a polyhydric alcohol as an initiator. Polyols obtained by ring-opening addition polymerization of cyclic ester compounds such as thiols are preferred.

  Examples of the polyhydric alcohol include trimethylolpropane, glycerin, pentaerythritol, sorbitol, and the like, ethylene glycol, diethylene glycol, propylene glycol, butanediol, neopentyl glycol, hexamethylene glycol, dipropylene glycol, trimethylene glycol, and the like. These bifunctional alcohols may be used in combination as long as the performance is not lowered. It is possible to use a polyester polyol prepared by a known condensation method between these alcohols and oxalic acid, malonic acid, maleic acid, adipic acid, tartaric acid, pimelic acid, sebacic acid, phthalic acid, terephthalic acid and the like. it can.

  Preferred lactones include β-propiolactone, β-butyrolactone, γ-butyrolactone, β-valerolactone, γ-valerolactone, δ-valerolactone, α-caprolactone, β-caprolactone, γ-caprolactone, δ- Examples include caprolactone, ε-caprolactone, α-methyl-ε-caprolactone, β-methyl-ε-caprolactone, 4-methylcaprolactone, γ-caprolactone, ε-caprolactone, ε-palmitolactone, and the like. One or two or more selected from the above can be mixed and used. Among them, a ring-opening addition polymer of ε-caprolactone using trimethylolpropane as an initiator is preferable from the viewpoint of stability during polymerization and economy.

  The polyester polyol (a3) in the present invention has a hydroxyl group functional group number of 2 or more and less than 3, especially a polyester polyol obtained from a glycol and a dicarboxylic acid component, or a cyclic ester compound such as a lactone using a glycol as an initiator. A polyol obtained by polymerization is preferred.

  Examples of the glycol include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, and 1,5-pentanediol. 1,6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 3-methyl-1,5-pentanediol, 3,3-dimethylolheptane, diethylene glycol, dipropylene glycol, neopentyl glycol , Cyclohexane-1,4-diol, cyclohexane-1,4-dimethanol, dimer acid diol, ethylene oxide or propylene oxide adduct of bisphenol A, bis (β-hydroxyethyl) benzene, xylylene glycol, and the like. Trimethylolpropane, Glycerin, pentaerythritol, sorbitol, and can be used in combination. It is possible to use a polyester polyol prepared by a known condensation method between these alcohols and oxalic acid, malonic acid, maleic acid, adipic acid, tartaric acid, pimelic acid, sebacic acid, phthalic acid, terephthalic acid and the like. it can.

  Preferred lactones include β-propiolactone, β-butyrolactone, γ-butyrolactone, β-valerolactone, γ-valerolactone, δ-valerolactone, α-caprolactone, β-caprolactone, γ-caprolactone, δ- Examples include caprolactone, ε-caprolactone, α-methyl-ε-caprolactone, β-methyl-ε-caprolactone, 4-methylcaprolactone, γ-caprolactone, ε-caprolactone, ε-palmitolactone, and the like. One or two or more selected from the above can be mixed and used. Among them, a ring-opening addition polymer of ε-caprolactone using ethylene glycol as an initiator is preferable from the viewpoint of stability during polymerization and economy.

  The mass ratio of the polycarbonate diol (a1) and the polyester polyol (a2) or ((a2) + (a3)) is (a1) / (a2) = 75/25 to 55/45, (a1) / ((a2) + (A3)) = 75/25 to 55/45, more preferably (a1) / (a2) = 70/30 to 60/40, (a1) / ((a2) + (a3)) = 70/30 to 60/40. By making the mass ratio of (a1) / (a2) or ((a2) + (a3)) within this range, a soft tactile sensation is provided by the balance of the cohesive strength of polycarbonate diol, urethane group concentration, and polyester polyol content. The chemical resistance tends to be improved.

  The polycarbonate diol (a1) and the polyester polyols (a2) and (a3) may be used by simply mixing them, but by using a polyol obtained by a transesterification reaction, chemical resistance and soft hand In addition to improving the solubility in solvents.

  The average hydroxyl functional group number of the polyol (A) is 2.3 to 3.5, and a range of 2.5 to 3.0 is more preferable. By setting the average number of hydroxyl functional groups to 2.3 to 3.5, a soft tactile sensation is imparted by the balance between the crosslinked structure and the polyester polyol content, and chemical resistance tends to be improved.

  The average hydroxyl value of the polyol (A) is 75 to 285 mgKOH / g, more preferably 90 to 180 mgKOH / g. By setting the average hydroxyl value to 75 to 285 mgKOH / g, a soft tactile sensation is provided by the balance between the cohesive strength of the polycarbonate diol and the urethane group concentration, and chemical resistance tends to be improved.

  In the present invention, at least one selected from the group consisting of inorganic fine powders and organic fine powders having a particle size of 1 to 30 μm is used as the matting agent (C) for the expression of soft feel. As the inorganic fine powder, silica is preferably used, and salts such as glass, mica, zeolite, diatomaceous earth, graphite, clay, talc, calcium carbonate, metals, metal oxides, and the like are also used. As the organic fine powder, polyurethane beads are preferably used, and various resins such as acrylic resin and polyamide, silicone rubber, pulp, cellulose and the like can also be used. Two or more of these fine powders may be used in combination. The fine powder preferably has a spherical shape and preferably has a particle size of 1 to 30 [mu] m. A compounding quantity is 1-30 mass% of a polyurethane resin composition, Preferably it is 10-20 mass%.

  In the present invention, an organic solvent may be used as necessary.

  As the organic solvent, those which do not affect the reaction in the presence of the organic solvent are appropriately selected. Specific examples of the organic solvent include aliphatic hydrocarbons such as octane, alicyclic hydrocarbons such as cyclohexane and methylcyclohexane, ketones such as methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone, ethyl acetate, butyl acetate, and isobutyl acetate. Esters such as ethylene glycol ethyl ether acetate, propylene glycol monomethyl ether acetate, 3-methyl-3-methoxybutyl acetate, glycol ether esters such as ethyl-3-ethoxypropionate, ethers such as dioxane, iodination Polarized aprotic such as halogenated hydrocarbons such as methylene and monochlorobenzene, N-methylpyrrolidone, dimethylformamide, dimethylacetamide, dimethylsulfoxide, hexamethylphosphonylamide Such as the media, and the like. These solvents can be used alone or in combination of two or more.

  Specific examples of the polyisocyanate (B) that reacts with the polyol (A) include aromatic diisocyanates, aliphatic diisocyanates, alicyclic diisocyanates, araliphatic diisocyanates, and isocyanurate group-containing polysiloxanes obtained using these polyisocyanates as raw materials. Isocyanate, uretdione group-containing polyisocyanate, uretdione group and isocyanurate group-containing polyisocyanate, urethane group-containing polyisocyanate, allophanate group-containing polyisocyanate, burette group-containing polyisocyanate, uretonimine group-containing polyisocyanate, etc. A combination of the above can be used.

  Although the urethanization reaction proceeds even without a catalyst, the reaction can be accelerated by using a known urethanization reaction catalyst. Specific examples of the catalyst that can be used in the urethanization reaction include organic metal compounds such as dibutyltin diacetate, dibutyltin dilaurate, and dioctyltin dilaurate, organic amines such as triethylenediamine and triethylamine, and salts thereof.

  In the present invention, surfactants, leveling agents, viscosity modifiers, anti-gelling agents, flame retardants, plasticizers, which are widely used as additives in order to enhance physical properties and add various physical properties, Antioxidants, UV absorbers, hydrolysis inhibitors, antibacterial agents, fillers, internal mold release agents, reinforcing materials, conductivity-imparting agents, charge control agents, antistatic agents, dispersants, lubricants, dyes, pigments, etc. Processing aids can be used.

  The urethane resin composition for paints of the present invention can be used as a soft feel paint for home appliances, OA products, mobile phones, automobile interior parts, leather surface treatments, etc., and soft touch and UV contained in cosmetics, etc. It is possible to achieve both durability against absorbents and insect repellents.

  Here, the ultraviolet absorber used as an index for evaluating the ultraviolet absorbent resistance mentioned in the effect of the present invention will be described. As ultraviolet absorbers, paraaminobenzoic acid type, cinnamic acid type, benzophenone type, salicylic acid type, benzoyltriazole type, other aromatic ultraviolet absorbers mainly contained in cosmetics, etc., and a mixture comprising one or more of these As these substances migrate to the polyurethane resin composition of the molded product or coating material, phenomena such as appearance deterioration and stickiness of the molded product surface are observed.

  Among these UV absorbers, 2-hydroxy-4-methoxybenzophenone, 2-ethylhexyl salicylate, 3,3,5-trimethylcyclohexyl salicylate, 4-tert-butylbenzoyl (4-methoxybenzoyl) methane, 3, 2-Ethylhexyl 3-diphenyl-2-cyanoacrylate can be a significant hindrance to the UV-absorbing property of molded articles and coating materials.

  N, N-diethyl-3-methylbenzamide (DEET) is often used as an insect repellent and has an excellent mosquito repellent effect, but is known to penetrate the skin and damage synthetic leather and plastic Yes.

  Examples of the present invention will be described below, but the present invention is not construed as being limited to these examples.

[Manufacture of polyol 1]
The mixing ratio of 1,6-hexanediol (hereinafter abbreviated as 1,6-HG) as a glycol to diethyl carbonate (hereinafter abbreviated as DEC) is added to a reaction apparatus including a stirrer, a thermometer, a heating device, and a distillation tower. In order to obtain a molar ratio of 1.08, 830 g of 1,6-HG and 771 g of DEC were charged, and 0.05 g of tetrabutyl titanate (hereinafter abbreviated as TBT) was further charged as a reaction catalyst under a nitrogen stream. The temperature was gradually raised to 190 ° C. When the distillation of ethanol slows down and the top temperature of the distillation column becomes 50 ° C. or lower, the pressure is gradually reduced to 1.3 kPa while maintaining the reaction temperature at 190 ° C., and further at a pressure of 1.3 kPa for 7 hours. Reacted. Further, the reaction was continued under a reduced pressure of 1.3 kPa or less at a reaction temperature of 190 ° C. until the hydroxyl value of the reaction product became 54 to 58 (mg-KOH / g) to obtain a polyol (Polyol-1). The obtained polyol had a hydroxyl value of 55.6 (mg-KOH / g).

[Manufacture of polyol 2]
645 g of the polyol (Polyol-1) obtained in Production 1 of the polyol compound, 350 g of polycaprolactone triol (PCL-305) and 4.85 g of 1,6-HG were charged, and the ester exchange reaction was carried out at 190 ° C. for 5 hours. The polyol was obtained (Polyol-2). The obtained polyol had a hydroxyl value of 150.8 (mg-KOH / g).

[Manufacture of polyol 3]
687 g of the polyol (Polyol-1) obtained in Production 1 of polyol, 300 g of polycaprolactone triol (PCL-305), 13.1 g of 1,6-HG were charged, and the ester exchange reaction was performed at 190 ° C. for 5 hours. A polyol was obtained (Polyol-3). The obtained polyol had a hydroxyl value of 143.2 (mg-KOH / g).

[Manufacture of polyol 4]
503 g of the polycarbonate diol (Polyol-1) obtained in Polyol Production 1 and 215 g of polycaprolactone diol (PCL-220) were charged, and the ester exchange reaction was carried out at 190 ° C. for 5 hours to obtain a polyol (Polyol-4). . The obtained polyol had a hydroxyl value of 56.6 (mg-KOH / g).

[Manufacture of polyol 5]
In a reaction apparatus comprising a stirrer, a thermometer, a heating device, and a distillation tower, the mixing ratio of 1,6-HG as a glycol to diethyl carbonate (hereinafter abbreviated as DEC) is 1.16 in a molar ratio. , 6-HG 841 g and DEC 723 g were charged, and 0.05 g of tetrabutyl titanate (hereinafter abbreviated as TBT) was added as a reaction catalyst, and the temperature was gradually raised to 190 ° C. in a nitrogen stream. When the distillation of ethanol slows down and the top temperature of the distillation column becomes 50 ° C. or lower, the pressure is gradually reduced to 1.3 kPa while maintaining the reaction temperature at 190 ° C., and further at a pressure of 1.3 kPa for 7 hours. Reacted. Furthermore, the reaction was continued under a reduced pressure of 1.3 kPa or less at a reaction temperature of 190 ° C. until the hydroxyl value of the reaction product became 110 to 114 (mg-KOH / g) to obtain a polyol (Polyol-5). The obtained polyol had a hydroxyl value of 112.4 (mg-KOH / g).

[Manufacture of polyol 6]
854 g of the polyol (Polyol-1) obtained in the production 1 of polyol, 100 g of polycaprolactone triol (PCL-305), 46.2 g of 1,6-HG were charged, and transesterification was performed at 190 ° C. for 5 hours. A polyol was obtained (Polyol-6). The polyol obtained had a hydroxyl value of 122.4 (mg-KOH / g).

[Manufacture of polyol 7]
826 g of 1,6-HG, DEC so that the mixing ratio of 1,6-HG as a glycol to DEC is 1.05 in a molar ratio in a reaction apparatus including a stirrer, a thermometer, a heating device, and a distillation column. 187 g of tetrabutyl titanate (hereinafter abbreviated as TBT) was added as a reaction catalyst, and the temperature was gradually raised to 190 ° C. under a nitrogen stream. When the distillation of ethanol slows down and the top temperature of the distillation column becomes 50 ° C. or lower, the pressure is gradually reduced to 1.3 kPa while maintaining the reaction temperature at 190 ° C., and further at a pressure of 1.3 kPa for 7 hours. Reacted. Furthermore, the reaction was continued under a reduced pressure of 1.3 kPa or less at a reaction temperature of 190 ° C. until the hydroxyl value of the reaction product was 35 to 39 (mg-KOH / g), to obtain a polyol. The obtained polyol had a hydroxyl value of 37.6 (mg-KOH / g). Next, 575 g of the obtained polyol, 400 g of polycaprolactone triol (PCL-305) and 25 g of polycaprolactone diol (PCL-210) were charged, and a transesterification reaction was performed at 190 ° C. for 5 hours to obtain a polyol (Polyol). -7). The obtained polyol had a hydroxyl value of 145.3 (mg-KOH / g).

[Creation of evaluation coating film]
As shown in Example 1 of Table 1, the matting agent ACEMATT OK900 (silica, particle size 7.5 μm, manufactured by EVONIK) is 5 parts, and the leveling agent BYK-331 (Bicchemy Japan) is 0 with respect to 20 parts of polyol. .25 parts, 0.05 parts of catalyst DOTDL (Kishida Chemical) and 81.3 g of butyl acetate were added so that the solid content was 30% in consideration of the curing agent, followed by mixing to obtain a main agent. Next, 9.5 parts of the curing agent C-HXLV is mixed with the main agent so that the molar number of hydroxyl groups of the main agent and the molar number of isocyanate groups of the curing agent is 1/1 so that the dry film pressure on the base material (ABS resin) is 60 μm. A coating film was prepared by drying at 80 ° C./2 hours and further curing at 25 ° C./96 hours. The physical properties were evaluated using this coating film.
For Examples 2 to 5 and Comparative Examples 1 to 6, coating films were prepared in the same manner as in Example 1 and physical properties were evaluated.

In addition, the raw materials used in the present invention are shown below.
PCL-305 Polycaprolactone triol (molecular weight = 550, hydroxyl value = 305, number of functional groups = 3) PCL-312 manufactured by Daicel Corporation Polycaprolactone triol (molecular weight = 1250, hydroxyl value = 135, number of functional groups = 3) PCL- manufactured by Daicel Corporation 220 Polycaprolactone diol (molecular weight = 2000, hydroxyl value = 56.1, number of functional groups = 2) PCL-210 manufactured by Daicel Corporation Polycaprolactone diol (molecular weight = 1000, hydroxyl value = 112, number of functional groups = 2) C-made by Daicel Corporation HXLV polyisocyanate curing agent (NCO content = 23.2%) manufactured by Tosoh Corporation

  About the obtained coating film, the following items were evaluated and the results are shown in Table 1.

1. Using the friction tester KSE-SE (manufactured by Kato Tech Co., Ltd.) on the surface of the touch-sensitive coating film, the friction force (μ) that is an index of grip feeling at a load of 25 g of piano wire, and the friction force standard that is an index of roughness Deviation (μMD) was measured. Those satisfying 0.5 ≦ μ ≦ 1.0 and μMD ≦ 0.012 were evaluated as “◯”, and those not satisfying as “×”.

2-1. Chemical resistance <Ultraviolet absorber resistance>
Glycerol 3% solutions of the following compounds were prepared, one drop of each prepared solution was dropped on the coating film, and allowed to stand at 40 ° C. for 1 hour, and then the wiping appearance was visually evaluated.
<Compound>
(1) 2-hydroxy-4-methoxybenzophenone (2) 2-ethylhexyl salicylate (3) 3,3,5-trimethylcyclohexyl salicylate (4) 4-tert-butylbenzoyl (4-methoxybenzoyl) methane (5) 3 , 3-Diphenyl-2-cyanoacrylate 2-ethylhexyl <Evaluation criteria>
・ Swelling, wrinkling, and dissolution occurred in most of the coating film (Evaluation: x)
・ Most of the paint film has wrinkles (evaluation: △)
・ Slightly swollen to the extent that a drip mark remains on the coating film (Evaluation: ○)
・ No change in coating film (Evaluation: ◎)

<Insect repellent properties>
A 10% ethanol solution of DEET was prepared, one drop of the prepared solution was dropped on the coating film, and allowed to stand at 40 ° C. for 1 hour, and then the wiping appearance was visually evaluated.
<Evaluation criteria>
・ Swelling, wrinkling, and dissolution occurred in most of the coating film (Evaluation: x)
・ Most of the paint film has wrinkles (evaluation: △)
・ Slightly swollen to the extent that a drip mark remains on the coating film (Evaluation: ○)
・ No change in coating film (Evaluation: ◎)

Claims (7)

In a polyurethane resin composition containing a polyol (A) containing a polycarbonate diol (a1) and a polyester polyol (a2) having 3 or more hydroxyl functional groups, a polyisocyanate (B), and a matting agent (C), the polyol (A) Has an average hydroxyl functional group number of 2.3 to 3.5, a hydroxyl value of 70 to 285 mgKOH / g, and a mass ratio of (a1) to (a2) of (a1) / (a2) = 75/25 to 55 / 45 urethane resin composition for paints, characterized in that it is / 45. Polyol (A), Polyisocyanate (B), Matte containing Polycarbonate polyol (a2) having a polyester diol (a2) having 3 or more hydroxyl functional groups and Polyester polyol (a3) having 2 or more but less than 3 hydroxyl functional groups In the polyurethane resin composition containing the agent (C), the average hydroxyl functional group number of the polyol (A) is 2.3 to 3.5, the hydroxyl value is 70 to 285 mgKOH / g, and (a1) and ((a2) + (A3)) The mass ratio of (a1) / ((a2) + (a3)) = 75/25 to 55/45 is a urethane resin composition for paints. The urethane resin composition for paint according to claim 1 or 2, wherein the polyester polyols (a2) and (a3) are polyester polyols obtained by ring-opening addition polymerization of a cyclic ester compound. The urethane resin composition for paint according to any one of claims 1 to 3, wherein the polyisocyanate (B) contains a trimer of an aliphatic isocyanate. The urethane resin composition for paint according to any one of claims 1 to 4, wherein the matting agent (C) contains at least one selected from the group consisting of inorganic fine powder and / or organic fine powder. The urethane resin composition for paint according to any one of claims 1 to 4, wherein the matting agent (C) is silica. A tactile sensation paint comprising the urethane resin composition for paints according to any one of claims 1 to 6.