Transparent polymeric laminate
First Claim
1. A transparent polymeric laminate comprising a sheet of plasticized partial polyvinyl butyral containing about 17 to 25 weight percent hydroxyl groups chemically linked by urethane groups to a thermoset polyurethane layer formed as the reaction product of a cross-linkable mixture containing photoinitiator, cycloaliphatic diisocyanate having NCO groups chemically attached to secondary cycloaliphatic carbons and a polyether polyol containing primary or secondary hydroxyl groups having a molecular weight between about 250 to about 8000.
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Abstract
A transparent polymeric laminate of plasticized polyvinyl butyral sheet chemically linked by urethane groups to a thermoset polyurethane layer formed as the reaction product of a cross-linkable mixture containing diisocyanate and polyether polyol containing primary or secondary hydroxyl groups and having a molecular weight between about 250 to about 8000.
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Citations
9 Claims
- 1. A transparent polymeric laminate comprising a sheet of plasticized partial polyvinyl butyral containing about 17 to 25 weight percent hydroxyl groups chemically linked by urethane groups to a thermoset polyurethane layer formed as the reaction product of a cross-linkable mixture containing photoinitiator, cycloaliphatic diisocyanate having NCO groups chemically attached to secondary cycloaliphatic carbons and a polyether polyol containing primary or secondary hydroxyl groups having a molecular weight between about 250 to about 8000.
Specification