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Coating composition
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A composition and coating technology, applied in polyurea/polyurethane coatings, coatings, devices for coating liquid on surfaces, etc., can solve problems such as deterioration of coating film appearance, achieve excellent sagging resistance, and excellent finished product appearance and the effect of water bleaching resistance
Active Publication Date: 2021-09-21
KANSAI PAINT CO LTD
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Problems solved by technology
[0003] However, when the object to be coated has a vertical plane, the wet coating film on the vertical plane sags, so that the appearance of the resulting coating film deteriorates
Method used
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[0040] Specific examples include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, (meth)acrylic acid Tert-butyl ester, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, isomyristyl (meth)acrylate, stearyl (meth)acrylate, isostearyl acrylate ( Trade name, manufactured by Osaka Organic Chemical Industry, Ltd.), lauryl (meth)acrylate, tridecyl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, cyclohexyl (meth)acrylate ester, isobornyl (meth)acrylate, etc.
[0041] (3) Aromatic vinyl monomer
[0042] Specific examples include styrene, α-methylstyrene, vinyltoluene, and the like.
[0043] When an aromatic vinyl monomer is used as a constituent, the glass transition temperature of the resulting resin increases, and a hydrophobic coating film having a high refractive index can be obtained. Thus, the effect of improving the appearance of the finished product due to the increase in the glossiness of the coating...
Embodiment
[0296] The present invention is described in more detail below with reference to Production Examples, Examples, and Comparative Examples. However, the present invention is not limited thereto. In each example, unless otherwise specified, parts and percentages are expressed on a mass basis, and the film thickness is that of a cured coating film.
[0297] Production of hydroxyl-containing acrylic resin (A1-1-1)
manufacture example 1
[0299] 27 parts of Swasol 1000 (trade name, manufactured by Cosmo Oil Co., Ltd., aromatic organic solvent) and 5 parts of propylene glycol monomethyl ether acetate were placed in an oven equipped with a thermometer, a thermostat, an agitator, a reflux condensing reactor, nitrogen inlet tube and dropping funnel in the reaction vessel. While blowing nitrogen gas into the reaction vessel, the mixture was stirred at 150°C. A monomer comprising 20 parts of styrene, 32.5 parts of 2-hydroxypropyl acrylate, 46.5 parts of isobutyl methacrylate, 1.0 parts of acrylic acid and 1.5 parts of di-tert-amyl peroxide (polymerization initiator) The mixture was added dropwise thereto at a constant rate over 4 hours. The resulting mixture was then aged at 150° C. for 1 hour, cooled, and further diluted by adding 34 parts of butyl acetate to obtain a hydroxyl-containing acrylic resin (A1-1-1) solution having a solid concentration of 60% by mass. The obtained hydroxyl group-containing acrylic resi...
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Abstract
Disclosed is a coating composition, which comprises (A) a binder ingredient, (B) a first viscosity modifier, and (C) a second viscosity modifier, wherein the first viscosity modifier (B) comprises a product of reaction among (b1) a polyisocyanate compound, (b2) a primary monoamine having a number-average molecular weight of 300 or less, and (b3) a polyetheramine having a number-average molecular weight higher than 300 but less than 6,000, the proportion of the polyetheramine (b3) having a number-average molecular weight higher than 300 but less than 6,000 being 0.5 mass% or higher but less than 10 mass% with respect to the sum of the ingredients (b1) to (b3), and the second viscosity modifier (C) comprises a product of reaction among (c1) a polyisocyanate compound, (c2) a primary monoamine having a number-average molecular weight of 300 or less, and (c3) a polyetheramine having two or more amino groups and having a number-average molecular weight of 1,000 or higher but less than 6,000, the proportion of the polyetheramine (c3) having two or more amino groups and having a number-average molecular weight of 1,000 or higher but less than 6,000 being in the range of 10-30 mass% with respect to the sum of the ingredients (c1) to (c3).
Description
technical field [0001] The present invention relates to coating compositions. Background technique [0002] In order to impart excellent appearance and performance to the object to be coated, a coating film is generally formed on the object to be coated by applying a coating composition to the object to form a wet coating film, and curing the wet coating film. [0003] However, when the object to be coated has a vertical plane, the wet coating film on the vertical plane sags, so that the appearance of the resulting coating film deteriorates. In order to solve this problem, research has been conducted on coating compositions containing rheology control agents (viscosity modifiers) having sag control capabilities. [0004] For example, PTL 1 discloses a coating composition comprising a binder component and a rheology control agent; and the rheology control agent used comprises: a polyisocyanate compound, a primary monoamine having a number-average molecular weight of 300 or l...
Claims
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Application Information
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