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US 10,308,834 B2Granted
UV curable coating compositions containing aliphatic urethane acrylate resins
AssigneeRed Spot Paint & Varnish Co., Inc.
InventorEileen M. Weber
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Abstract
Described in preferred embodiments are UV curable coating compositions including a unique blend of aliphatic urethane acrylate resins. Also described are coated articles and methods for their production involving the use of the coating compositions.
Claims4
A UV curable coating composition, comprising:
- (1) an inert solvent;
- (2) a first aliphatic urethane acrylate resin, which is a reaction product of a polyisocyanate component represented by formula I below with an alcohol component containing at least one monobasic, hydroxy-functional, linear or branched C1-C12 alkyl ester of (meth)acrylic acid:
- wherein R1, R2, and R3 of formula I are the same or different, and each comprise linear or branched, C4-C20 (cyclo)alkyl groups, wherein X is the same or different and comprises isocyanate groups and wherein R1, R2, and R3 of formula I are attached to a nitrogen atom;
- (3) a second aliphatic urethane acrylate resin comprising the structure of formula II:
- wherein A1, A2, and A3 are each a group comprising the structure of formula III:
- wherein R1, R2, and R3 of formula III are the same or different, and each comprise a linear aliphatic group having from 2 to 12 carbon atoms, or a cycloaliphatic group having from 4 to 12 carbon atoms, wherein the second urethane acrylate has an average molecular weight of 500 to 2,000, wherein the second urethane acrylate resin contains 6 polymerizable acrylate groups per molecule, and wherein the first aliphatic urethane acrylate resin and the second aliphatic urethane acrylate resin comprise a weight ratio of 1:3 to 3:1;
- (4) a first multifunctional acrylate, wherein the first multifunctional acrylate has an average molecular weight of 170 to 1,000, and wherein the first multifunctional acrylate comprises two polymerizable unsaturated groups per molecule;
- (5) a second multifunctional acrylate, wherein the second multifunctional acrylate is selected from at least one of pentaerythritol triacrylate and trimethylolpropane triacrylate;
- (6) a first photoinitiator and a second photoinitiator, wherein the first and second photoinitiators are selected from the group consisting of diphenylphosiphine oxides, pheylglyoxylates, α-hydoxyketones, difunctional α-hydoxyketones and combinations thereof;
- (7) a hindered amine light stabilizer;
- (8) a UV absorber comprising at least one of a benzotriazole and a benzotriazine;
- (9) an acrylated organic-inorganic hybrid material;
- (10) a phenolic based antioxidant;
- and
- (11) a flow additive.
12 more elements
A UV curable coating composition, comprising:
- (1) a solvent;
- (2) a first aliphatic urethane acrylate resin, which is a reaction product of a polyisocyanate component represented by formula I below with an alcohol component containing at least one monobasic, hydroxy-functional, linear or branched C1-C12 alkyl ester of (meth)acrylic acid:
- wherein R1, R2, and R3 of formula I are the same or different, and each comprise linear or branched, C4-C20 (cyclo)alkyl groups, wherein X is the same or different and comprises isocyanate groups and wherein R1, R2, and R3 of formula I are attached to a nitrogen atom;
- (3) a second aliphatic urethane acrylate resin comprising the structure of formula II:
- wherein A1, A2, and A3 are each a group comprising the structure of formula III:
- wherein R1, R2, and R3 of formula III are the same or different, and each comprise a linear aliphatic group having from 2 to 12 carbon atoms, or a cycloaliphatic group having from 4 to 12 carbon atoms, wherein the second urethane acrylate has an average molecular weight of 500 to 2,000, wherein the second urethane acrylate resin contains 6 polymerizable acrylate groups per molecule, and wherein the first aliphatic urethane acrylate resin and the second aliphatic urethane acrylate resin comprise a weight ratio of 1:3 to 3:1;
- (4) a first multifunctional acrylate, wherein the first multifunctional acrylate has an average molecular weight of 170 to 1,000, and wherein the first multifunctional acrylate comprises two polymerizable unsaturated groups per molecule;
- (5) a second multifunctional acrylate, wherein the second multifunctional acrylate is selected from at least one of pentaerythritol triacrylate and trimethylolpropane triacrylate;
- (6) a photoinitiator;
- (7) a hindered amine light stabilizer;
- and
- (8) a UV absorber.
9 more elements
Dependencies are inferred from the claim text.