Abstract: Silicone resin compositions useful as transfer molding resins are prepared by blending a siloxane resin, filler, and as a catalyst an alkali metal salt of a carboxylic acid, a combination of an alkali metal carbonate or bicarbonate and a carboxylic acid, or an alkali metal carbonate and an ammonium salt of a carboxylic acid.

Abstract: Touch position sensitive optical waveguides comprise a layer of optically transparent polyorganosiloxane elastomer exhibiting a hardness of up to 100 on the Shore 00 scale. The elastomer layer is the product of a hydrosilation reaction and at least one surface of the layer bears a dirt- and puncture-resistant coating formed from a polyurethane, a polyorganosiloxane or an organosiloxane/urethane copolymer. The compressability, compressive strength and resiliency of the waveguide are within specified limits.

Abstract: Bubble migration from a surface of a container or other substrate into a polyorganosiloxane gel that is in contact with the surface can be substantially eliminated by coating the surface with a liquid composition comprising an organohydrogensiloxane containing at least three silicon-bonded hydrogen atoms per molecule. The liquid composition is covered with a layer of uncured silicone rubber that is curable by hydrosilation reaction in addition to being compatible with and adherent to the polyorganosiloxane gel. The gel is then placed over the uncured silicone rubber, after which the rubber and gel are concurrently cured. The cured silicone rubber exhibits a durometer hardness value of at least 10 on the Shore A scale, and the layer of silicone rubber is at least 3 mm. thick.