04242406 is referenced by 108 patents and cites 21 patents.

This invention relates to a structural laminate having a plastic surface finish coat laminated to a structural base which has exceptional bond strength between the structural base and the plastic layer with which it interfaces. The structural base comprises a glass reinforced gypsum layer. The plastic laminate portion comprises a plastic surface finish coat, preferably a polyester gel coat or an acrylic resin, bonded to a reinforcing layer of curable polyester or epoxy resin reinforced with glass fibers. The reinforcing layer is adhered to a bonding layer which comprises glass fibers protruding from the reinforcing layer and coated with a limited amount of organic resin such as polyester or epoxy resin. The glass reinforced gypsum layer is applied to the protruding fibers of the bonding layer to form an interface having a bond strength of at least about 150 psi as determined by ASTM C297-68.

Title
Fiber reinforced composite structural laminate composed of two layers tied to one another by embedded fibers bridging both layers
Application Number
6/34695
Publication Number
4242406
Application Date
April 30, 1979
Publication Date
December 30, 1980
Inventor
Wayne M Knoll
Wheaton
IL, US
Robert M Hoffman
Palos Heights
IL, US
Donald M Harwick
Pittsburgh
PA, US
Thomas J Fitzpatrick
Libertyville
IL, US
Larbi El Bouhnini
Hanover Park
IL, US
Agent
Jones Tullar & Cooper
Assignee
United States Gypsum Company
IL, US
PPG
PA, US
IPC
E04C 2/26
B32B 13/14
B32B 13/12
B32B 13/02
B29C 5/02
B28B 1/32
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