Radiation-curable protective coating composition
First Claim
1. Normally solid, organic solvent-soluble, thermoplastic, polyethylenically-unsaturated, cellulosic polyurethane polymers comprising the polymerization product of a reaction mixture of (a) aliphatic or cycloaliphatic diol comprising sufficient ethylenically-unsaturated organic diol to permit crosslinking of the polymerization product to a solvent-insoluble state;
- (b) organic solvent-soluble cellulosic ether or ester having residual unreacted cellulosic hydroxyl groups; and
(c) organic diisocyanate.
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Abstract
Normally solid, organic solvent-soluble, thermoplastic, polyethylenically-unsaturated, cellulosic polyurethane polymers are provided. These cellulosic polyurethane polymers comprise one or more cellulose ether or ester segments, one or more alkylene moieties having at least two carbon atoms and which can be substituted or interrupted by ether oxygen atoms, ester groups, or phenylene groups, two or more residues of diisocyanates, the segments, moieties, and residues being linked together by linking groups with the proviso that said alkylene moieties contain sufficient ethylenic unsaturation that said polymer can be crosslinked to a solvent-insoluble state. The cellulosic polyurethane polymers can be obtained by the polymerization of a reaction mixture comprising (a) aliphatic or cycloaliphatic diol comprising sufficient ethylenically-unsaturated diol to permit crosslinking of the polymerization product to a solvent-insoluble state; (b) organic solvent-soluble cellulose ether or ester having residual unreacted cellulosic hydroxyl groups; and (c) organic diisocyanate. The reaction product may optionally also contain primary or secondary aliphatic or aromatic diamines or dithiols. Also provided are coating compositions and shaped articles and methods for preparing same.
176 Citations
45 Claims
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1. Normally solid, organic solvent-soluble, thermoplastic, polyethylenically-unsaturated, cellulosic polyurethane polymers comprising the polymerization product of a reaction mixture of (a) aliphatic or cycloaliphatic diol comprising sufficient ethylenically-unsaturated organic diol to permit crosslinking of the polymerization product to a solvent-insoluble state;
- (b) organic solvent-soluble cellulosic ether or ester having residual unreacted cellulosic hydroxyl groups; and
(c) organic diisocyanate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
- (b) organic solvent-soluble cellulosic ether or ester having residual unreacted cellulosic hydroxyl groups; and
- 28. A normally solid, organic solvent-soluble, thermoplastic, polyethylenically-unsaturated, cellulosic polyurethane polymer comprising one or more cellulose ether or ester segments, Rc, one or more alkylene moieties, Rd, having at least two carbon atoms and which can be substituted, or interrupted by ether oxygen atoms, ester groups, and phenylene groups, and two or more residues of diisocyanates, Ri, with the proviso that said alkylene moieties contain sufficient ethylenic unsaturation that said polymer can be crosslinked to a solvent insoluble state.
Specification