Phenolic resin based laminate materials and procedure for their preparation
AssigneeEveritube, c/o Saint-Gobain Recherche
InventorsFrancois Le Gac, Pierre Chevalier
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Abstract
A phenolic resin based laminate material which can be cross-linked by acid catalysis, endowed with a reinforcement, comprising at least two surfaces and having on at least one of its two surfaces at least one additional nonphenolic resin-based layer is disclosed. In accordance with the invention, the additional layer in contact with the phenolic resin is obtained from a formula comprising an unsaturated polyester resin, a cross-linking solvent of said resin, possibly one or several other additives, at least one of the main components having a formula comprising hydrophilic centers in a number at least equal to the number of non-saturation centers in the polymeric chain of the resin.
Claims12
A reinforced laminate material having several successive alternating layers of a reinforcement and of a phenolic resin which can be cross-linked by an acid catalyst, comprising at least two surfaces one of which has at least one additional layer which is non-phenolic resin based, wherein said additional layer in contact with said reinforced phenolic resin is obtained from a composition comprising an ethylenically unsaturated polyester resin and a cross-linking solvent of said resin, wherein at least one of the components of said composition bears hydrophilic sites in a number which is at least equal to the number of unsaturation sites of the polymeric chain of the polyester resin, said additional layer being formed by the gel-coat technique and said hydrophilic sites being hydroxyl or carboxyl groups carried on the main chain of at least one polyol or diacid reactant for the formation of the polyester resin.
Dependencies are inferred from the claim text.