04943472 is referenced by 38 patents and cites 27 patents.

An improved multifilamentary fibrous material is formed having solid particles of a matrix-forming thermosetting resin substantially uniformly dispersed among adjoining filaments in the absence of fusion bonding. The thermosetting resin 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 thermosetting resin 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 resin 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 thermosetting resin forms the matrix phase.

Title
Improved preimpregnated material comprising a particulate thermosetting resin suitable for use in the formation of a substantially void-free fiber-reinforced composite article
Application Number
928917
Publication Number
4943472
Application Date
October 25, 1989
Publication Date
July 24, 1990
Inventor
Edward D Western
Fort Mill
SC, US
Alan C Handermann
Matthews
NC, US
Joel A Dyksterhouse
Marathon
FL, US
Robert Dyksterhouse
Marathon
FL, US
Agent
Burns Doane Swecker & Mathis
Assignee
BASF Aktiengesellschaft
DE
IPC
B32B
B32B 27/06
B32B 5/26
B32B 5/08
View Original Source