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US 12,636,858 B2Granted
In-mold composite surfacing film
AssigneeAkzo Nobel Coatings International B.V.
InventorsEric Orvis, Matthew Paul Amick
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Abstract
This disclosure relates to an in-mold surfacing film for structural composites, in the form of a thermally curable multi-layer film comprising: (a) a release carrier, (b) a surfacing film layer overlying the release carrier, wherein the surfacing film layer comprises an OH-functional polyurethane and a thermally activatable curing agent which can react with the OH groups at a temperature higher than 120° C., and (c) a release liner. Also disclosed is a method for preparing a composite article in-mold using a prepreg and the multi-layer film.
Claims11
A thermally curable multi-layer film comprising:
- (a) a release carrier,
- (b) a surfacing film layer overlying the release carrier, wherein the surfacing film layer comprises an OH-functional polyurethane, and a thermally activatable curing agent which can react with the OH groups at a temperature higher than 120° C., wherein the thermally activatable curing agent comprises a blocked isocyanate or an amino resin, and
- (c) a release liner.
Dependencies are inferred from the claim text.