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US 4,514,462 AGranted
Warp resistant laminates having a core impregnated with a mixture of phenolix resin and alkyl substituted phenol
AssigneeWestinghouse Electric Corp.
InventorLenon G. Brooker
Life of this patent
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Abstract
An impregnating composition for warp free laminates, is made from the diluted reaction mixture of: a phenolic component selected from at least one of phenol, resol, xylenol, resorcinol, naphthol; alkyl substituted phenol, where alkyl contains from 4 to 13 carbon atoms; and aldehyde.
Claims9
A sheet material, impregnated with a reaction mixture composition consisting essentially of:
- (1) a phenolic component selected from the group consisting of phenol, cresol, xylenol, resorcinol, naphthol, and mixtures thereof,
- (2) alkyl substituted phenol, where alkyl contains from 4 to 13 carbon atoms, and
- (3) aldehyde;
- where the mole ratio of phenolic component:alkyl substituted phenol is from about 1:0.0035 to 0.5, said composition being in the dried "B"-stage.
1 more element
A cured, bonded, unitary, warp resistant comprising:
- (1) a melamine resin impregnated sheet, and
- (2) at least one core sheet disposed next to the melamine impregnated sheet, said core sheet impregnated with a reaction mixture composition consisting essentially of:
- (1) a phenolic component selected from the group consisting of phenol, cresol, xylenol, resorcinol, naphthol, and mixtures thereof,
- (2) alkyl substituted phenol, where alkyl contains from 4 to 13 carbon atoms, and
- (3) aldehyde;
- where the mole ratio of phenolic component:alkyl substituted phenol is from about 1:0.0035 to 0.5,
- said melamine resin and reaction mixture composition being in the cured state.
4 more elements
Dependencies are inferred from the claim text.