Sheet of polyvinyl butyral and polyurethane

Details Sheet of polyvinyl butyral and polyurethane Sheet of polyvinyl butyral and polyurethane

1989-09-18

1991-07-02

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

4284255, 4284256, 525455, 525456, C08G 6348, C08G 6391, C08F28304, B32B 2740

Patent

active

050286587

ABSTRACT:
A sheet formed of a polyblend comprising, on a weight basis, a) 30 to 90% polyvinyl butyral containing about 11 to 30% hydroxyl groups and b) 70 to 10% thermoplastic polyurethane which is the reaction product of:

REFERENCES:
patent: 3431224 (1969-03-01), Goldblum
patent: 3458388 (1969-07-01), Moynihan
patent: 3620905 (1971-11-01), Ahramjian
patent: 3671370 (1972-06-01), Littell, Jr.
patent: 3979548 (1976-09-01), Schafer et al.
patent: 4937147 (1990-06-01), Cartier et al.

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