05128198 is referenced by 42 patents and cites 68 patents.

An improved multifilamentary fibrous material is formed having particles of a matrix-forming thermoplastic polymer substantially uniformly dispersed among adjoining filaments in the absence of fusion bonding. The polymer particles initially are dispersed in an aqueous medium containing an effective amount of a dissolved polymeric binding agent and the viscosity of the medium subsequently is substantially increased to at least 50,000 cps. to form a gelled impregnation bath having a plastic flow characteristic with shear-thinning behavior wherein the polymer particles are substantially uniformly suspended. The resulting impregnation bath is caused to flow between the adjoining filaments of the multifilamentary fibrous material with a concomitant viscosity reduction which aids in the incorporation of the polymer particles. The concentration of the aqueous medium in the product is controlled to yield a uniform, handleable, drapable, tacky, and highly stable product. Upon the application of heat and pressure the improved product can be transformed into a fiber-reinforced composite article wherein the solid particles form the matrix phase.

Title
Production of improved preimpregnated material comprising a particulate thermoplastic polymer suitable for use in the formation of a substantially void-free fiber-reinforced composite article
Application Number
928917
Publication Number
5128198
Application Date
October 25, 1989
Publication Date
July 7, 1992
Inventor
Joel A Dyksterhouse
Marathon
FL, US
Robert Dyksterhouse
Marathon
FL, US
Agent
Burns Doane Swecker & Mathis
Assignee
BASF Aktiengesellschaft
DE
IPC
R32B 27/12
R32B 27/06
R32B 5/26
R32B 5/08
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