Cemcom Corporation

Research One Limited Partnership

F. P. C. Research, Inc.

Randall P Bright

Sean Wise

David D Double

Richard S Miller

Mark L MacKenzie

Richard D Vargo

Patricia M Dreyfuss

The temperatures at which the cementitious composite materials described in U.S. Pat. No. 4,482,385 can be used as tool or mold materials are extended by a treatment which comprises heating said composite materials to a temperature sufficient to expel free and adsorbed water from the concrete portion of the cementitious composite and thereafter refilling the resulting pores with an organic monomer or prepolymer and then crosslinking said impregnant to form an organic polymeric network in the inorganic composite material.

Cementitious composite material with vacuum integrity at elevated

Friction materials intended to be used as brake shoes, brake pads, and other brake components, comprising a composite in which one or more friction modifiers is embedded in a high strength cement matrix. The matrix material exhibits a flexural strength of at least 1,500 psi, a compressive strength of at least about 15,000 psi and a flexural modulus of about 1.times.10.sup.6 psi.

Cementitious composite friction compositions

An improvement over the cementitious composite material described in U.S. Pat. No. 4,482,385 consists in replacing the stainless steel particles with graded silicon carbide particles. The resulting material has a lower coefficient of thermal expansion, a greater thermal conductivity and an increased surface abrasion resistance as compared to the material described in the patent and is a lighter weight material. These properties enhance its applicability to certain uses.

Cementitious composite material with silicon carbide aggregate

A reinforcing material based on glass fibers and which is resistant to attack by the free alkali present in the cementitious matrix which is to be reinforced by said material is produced from ordinary glass scrim by coating said scrim with three successive rubber latex coatings by dipping the scrim into said latexes, and drying the coatings between dips.

Growing community of inventors

Bowie, MD, United States of America

Randall P Bright