Abstract: A method of forming a composite article may generally comprise forming a mixture of (i) a reactant gas stream comprising hydrogen and methyltrichlorosilane and (ii) solid silicon carbide particles; heating a carbon substrate in the reactor; heating the mixture of the reactant gas stream and solid silicon carbide particles to decompose the methyltrichlorosilane to produce silicon carbide material without causing the solid silicon carbide particles to react and injecting the heated mixture into the reactor; co-depositing the silicon carbide material and the solid silicon carbide particles onto the heated carbon substrate in the reactor to produce a CVD matrix comprising the silicon carbide material and the solid silicon carbide particles by chemical vapor deposition on the heated carbon substrate; post-treating the carbon substrate having the CVD matrix coating in a furnace; and cooling and removing the carbon substrate from the CVD matrix to form the transparent composite article.

Abstract: A method of forming a composite article may generally comprise forming a mixture of (i) a reactant gas stream comprising hydrogen and methyltrichlorosilane and (ii) solid silicon carbide particles; heating a carbon substrate in the reactor; heating the mixture of the reactant gas stream and solid silicon carbide particles to decompose the methyltrichlorosilane to produce silicon carbide material without causing the solid silicon carbide particles to react and injecting the heated mixture into the reactor; co-depositing the silicon carbide material and the solid silicon carbide particles onto the heated carbon substrate in the reactor to produce a CVD matrix comprising the silicon carbide material and the solid silicon carbide particles by chemical vapor deposition on the heated carbon substrate; post-treating the carbon substrate having the CVD matrix coating in a furnace; and cooling and removing the carbon substrate from the CVD matrix to form the transparent composite article.

Abstract: A method of forming a composite article may generally comprise forming a mixture of (i) a reactant gas stream comprising hydrogen and methyltrichlorosilane and (ii) solid silicon carbide particles; heating a carbon substrate in the reactor; heating the mixture of the reactant gas stream and solid silicon carbide particles to decompose the methyltrichlorosilane to produce silicon carbide material without causing the solid silicon carbide particles to react and injecting the heated mixture into the reactor; co-depositing the silicon carbide material and the solid silicon carbide particles onto the heated carbon substrate in the reactor to produce a CVD matrix comprising the silicon carbide material and the solid silicon carbide particles by chemical vapor deposition on the heated carbon substrate; post-treating the carbon substrate having the CVD matrix coating in a furnace; and cooling and removing the carbon substrate from the CVD matrix to form the transparent composite article.

Abstract: An impact resistant transparent laminate that includes as one ply a special urethane-modified acrylic sheet containing a vinyl-functional polyurethane elastomer that is a polymerization product of an aliphatic diisocyanate, one or more hydroxyl-functional polyether or polyester prepolymers, and a hydroxyl or amine-functional vinyl monomer. In a three-ply embodiment of the invention, the urethane modified acrylic sheet serves as the back ply, a hard plastic sheet formed of a material like cast acrylic serves as the front ply, and a thin sheet having high elongation such as polyurethane serves as an intermediate ply. In a five-ply embodiment of the invention, the laminate further includes a second thin sheet having high elongation disposed immediately behind the urethane-modified acrylic ply and a ductile plastic sheet formed of a material like polycarbonate to serve as its back ply.

Abstract: A plastic transparency for particular use as an airplane window, including a transparent sheet member and a thin resinous coating overlying the peripheral edge surface of the sheet member. The sheet member is formed of a multi-axially oriented plastic material that is absorptive of moisture, the volume of the member varying in accordance with the amount of moisture absorbed. The edge coating has a moisture permeation rate substantially less than that of the underlying sheet member, so when the window is exposed to an environment of high or variable humidity, any moisture gradient adjacent the peripheral edge surface is reduced, and the resultant tensile stress and incidence of cracking in the window are correspondingly reduced.

Abstract: A weatherable coating composition, especially for imparting abrasion resistance to thermoplastic substrates, comprising about 30-50 parts by weight of a colloidal silica and about 50 to 70 parts by weight of a mixture of (i) dialkyldialkoxysilane and (ii) alkyl trialkoxysilane wherein the weight ratio of (i) to (ii) is about 1:19 to about 1:4. A method of applying the coating composition to a substrate and coated articles are also disclosed.

Abstract: A weatherable coating composition, especially for imparting abrasion resistance to thermoplastic substrates, comprising about 30-50 parts by weight of a colloidal silica and about 50 to 70 parts by weight of a mixture of (i) dialkyldialkoxysilane and (ii) alkyl trialkoxysilane wherein the weight ratio of (i) to (ii) is about 1:19 to about 1:4. A method of applying the coating composition to a substrate and coated articles are also disclosed.