Vapor permeation curable coatings for surface-porous substrates
AssigneeAshland Oil, Inc.
InventorsJames R. Blegen, Helmut H. Zapfe, Eugene L. Bulgozdy
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Abstract
Disclosed is an improved method for coating a surface-porous substrate, e.g. an SMC substrate, with a film of curable coating composition and curing said film. The improvement comprises applying a film of the coating composition to the substrate wherein the coating composition comprises a phenol-functional compound and a multi-isocyanate curing agent therefor, and exposing the coated substrate to a vaporous tertiary amine catalyst to cure the applied film.
Claims22
In a method for coating a surface-porous substrate of a fibrous-reinforced molding compound with a film of a curable primer coating composition and curing said film, the improvement which comprises:
- (A) applying said film of said coating composition to said substrate, said coating composition comprising:
- (1) an aromatic-hydroxyl functional compound;
- and
- (2) a multi-isocyanate curing agent;
- and
- (B) exposing said coated substrate to a vaporous tertiary amine catalyst to rapidly cure said applied film at room temperature,
- said vaporous catalyst cured film being substantially free of surface imperfections.
In a method for coating a composite object manufactured from a surface-porous fibrous-reinforced molded compound part and from a non surface-porous part selected from metal, resinous material, and lignocellulosic material, with a film of a primer coating composition and curing said film, the improvement which comprises:
- (A) applying said film of said coating composition to both said surface porous part and to said non surface-porous part, said coating composition comprising:
- (1) an aromatic-hydroxyl functional compound;
- and
- (2) a multi-isocyanate curing agent;
- and
- (B) exposing said coated parts to a vaporous tertiary amine catalyst to rapidly cure said applied film at room temperature,
- said vaporous catalyst cured film on said surface-porous part being substantially free of surface imperfections.
Dependencies are inferred from the claim text.