Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1979-04-30
1980-12-30
Cannon, James C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
5230913, 5230914, 5230915, 52454, 52612, 156 39, 156 42, 156 44, 264171, 264258, 264309, 264337, 428246, 428268, 428272, 428284, 428285, 428286, 428287, 428302, 428414, 428415, 428417, 428431, 428432, 428482, 428483, 428500, 428521, B28B 132, B29C 502, B32B 1302, B32B 1312, B32B 1314, E04C 226
Patent
active
042424062
ABSTRACT:
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.
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El Bouhnini Larbi
Fitzpatrick Thomas J.
Harwick Donald M.
Hoffman Robert M.
Knoll Wayne M.
Cannon James C.
PPG Industries Inc.
United States Gypsum Company
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