In-mold coating compositions suitable as is for an end use application
First Claim
1. An in-mold coating composition, comprising;
- (a) a saturated aliphatic polyester urethane acrylate, said polyester portion being derived from at least a saturated carboxylic acid or an anhydride thereof and a saturated diol, said urethane portion being derived from an aliphatic saturated polyisocyanate;
(b) an aliphatic or cycloaliphatic (meth)acrylate wherein said aliphatic or said cycloaliphatic group is saturated and has from 1 to 50 carbon atoms;
(c) a hydroxyalkyl (meth) acrylate wherein said alkyl group has from 1 to 10 carbon atoms,(d) a vinyl substituted aromatic having from 8 to 12 carbon atoms, and,(e) a polyacrylate ester of an alkylene polyol wherein said alkylene group has from 2 to 30 carbon atoms.
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Accused Products
Abstract
An in-mold coating composition for a fiber reinforced plastic comprises an aliphatic resin such as a saturated aliphatic ester intermediate polyurethane having terminal acrylate end groups, a saturated (cyclo)aliphatic (meth)acrylate such as isobornyl acrylate, a hydroxyl alkyl (meth)acrylate, a polyacrylate ester of an alkylene polyol, and a vinyl substituted aromatic. The in-mold coating compositions have good end use weather-resistant properties so that there is no need for a subsequent paint coat thereon which heretofore has been required. The paint-free coating compositions can be either clear or pigmented and can contain various additives such as lubricants, adhesion aids, hardeners, and the like.
87 Citations
20 Claims
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1. An in-mold coating composition, comprising;
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(a) a saturated aliphatic polyester urethane acrylate, said polyester portion being derived from at least a saturated carboxylic acid or an anhydride thereof and a saturated diol, said urethane portion being derived from an aliphatic saturated polyisocyanate; (b) an aliphatic or cycloaliphatic (meth)acrylate wherein said aliphatic or said cycloaliphatic group is saturated and has from 1 to 50 carbon atoms; (c) a hydroxyalkyl (meth) acrylate wherein said alkyl group has from 1 to 10 carbon atoms, (d) a vinyl substituted aromatic having from 8 to 12 carbon atoms, and, (e) a polyacrylate ester of an alkylene polyol wherein said alkylene group has from 2 to 30 carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cured, in-mold coating composition, comprising;
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the reaction product of (a) a saturated aliphatic polyester urethane acrylate, said polyester portion derived from at least a saturated carboxylic acid or anhydride thereof and a saturated diol, (b) an aliphatic or cycloaliphatic (meth)acrylate wherein said aliphatic or said cycloaliphatic group is saturated and has from 1 to 50 carbon atoms, (c) a hydroxylalkyl (meth)acrylate, (d) a vinyl substituted aromatic having a total of from 8 to 12 carbon atoms, and (e) a polyacrylate ester of an alkylene polyol wherein said alkylene group has from 2 to 12 carbon, atoms in the presence of a peroxide initiator. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A process for molding an in-mold coating composition onto a fiber reinforced plastic substrate and forming a coating thereon of a predetermined thickness, comprising;
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molding said substrate between separable dies which coact in a first fully-closed position to define a mold cavity corresponding in size and shape to the substrate; allowing said substrate to harden in said cavity; separating one of said dies from said substrate to provide a first gap therebetween which is greater than said predetermined thickness of said coating; injecting a metered amount of in-mold coating composition into said first gap, said amount being sufficient to provide said predetermined thickness but insufficient to fill said first gap; applying molding pressure to said one die to reduce said first gap to a second gap which is commensurate with said predetermined thickness and to distribute said injected material substantially uniformly throughout said second gap and over said surface; maintaining said pressure while said material bonds to said surface and solidifies sufficiently to permit complete separation of said dies without disruption of the coating thus formed; and completely separating said dies and removing said coated substrate from said cavity; the improvement comprising an in-mold composition which includes the reaction product of (a) a saturated aliphatic polyester urethane acrylate, said polyester portion derived from at least a saturated carboxylic acid or an anhydride thereof and a saturated diol, (b) an aliphatic or cycloaliphatic (meth)acrylate, (c) a hydroxylalkyl (meth)acrylate, (d) a vinyl substituted aromatic having a total of from 8 to 12 carbon atoms, and (e) a polyacrylate ester of an alkylene polyol wherein said alkylene group has from 2 to 12 carbon atoms, in the presence of a peroxide initiator so that a cured in-mold coating composition is produced. - View Dependent Claims (18, 19, 20)
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Specification