Preparation of Multilayer Structural Composites Prepared Using Consolidation Liners Of High Parting Force

摘要

Composite structures prepared by laying up a plurality of plies of thermoplastic or thermoset fiber reinforced prepregs are produced by adhering a high parting force consolidation liner on at least one surface of the layup prior to curing and consolidation. The surface coating on the release paper is preferably free of controlled release additives, adheres well to consolidated compositions, and can be removed to expose the composite surface.

主权项

1. In a process for preparing a cured, multi-layer composite structure by laying up a plurality of polymer resin-containing, fiber reinforced prepregs to form an uncured multi-layer composite, and consolidating the uncured composite at elevated temperature, the improvement comprising employing a consolidation liner on at least one side of the composite during consolidation, wherein the consolidation liner has a surface coating prepared by coating a consolidation liner substrate with an aqueous emulsion comprising (A) a vinyl addition polymer, (B) an organopolysiloxane polymer bearing at least two ethylenically unsaturated groups, (C) an organosilicon crosslinker bearing at least three silicon bonded hydrogen atoms, and (D) a hydrosilylation catalyst, wherein components (B) and (C) are present in an amount of from about 5% by weight to about 50% by weight relative to the sum of (A), (B), and (C).