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US 4,788,091 AGranted
Flame retardant embossing film
AssigneeEmhart Enterprises Corp.
InventorsConrad Rossitto, Leon Pechinski
Life of this patent
Estimating the term…
Abstract
A flame retardant, curing adhesive film having improved OSU heat release properties is provided. The film contains decabromophenylene oxide and antimony trioxide as a flame retardant agent.
Claims13
A curing adhesive film which comprises:
- (a) an organic binder portion comprising a hydroxyl terminated polyurethane elastomer, a phenoxy resin, and a blocked aliphatic isocyanate prepolyer wherein the phenoxy and polyurethane are employed in a phenoxy to polyurethane weight ratio of about 1:3 to about 2:1;
- and
- (b) from about 50 to about 85% by weight of the total film composition of a fire retardant agent comprising:
- decabromophenylene oxide and antimony trioxide in a ratio of from about 3:2 to about 1:2 wherein said film has a total OSU heat release of from about 20 to about 40, adheres to polyvinylfluoride film, and is capable of preserving a pattern imparted to the polyvinylfluoride film in an embossing operation.
1 more element
A curing adhesive film which comprises:
- from about 5 to about 25 weight percent, based upon the total film composition, of a phenoxy resin;
- from about 5 to 20 weight percent hydroxyl terminated polyurethane elastomer;
- from about 2 to about 7 weight percent blocked aliphatic isocyanate prepolymer;
- from about 15 to 60 weight percent decabromophenylene oxide;
- from about 10 to about 25 weight percent antimony trioxide;
- and
- from about 20 to about 40 weight percent aluminum oxide trihydrate.
4 more elements
Dependencies are inferred from the claim text.