Bayer Aktiengesellschaft

Heinz Goller

Josef Schmoll

Hans-Hermann Schulz

Raymond Audenaert

Bernhard Leusner

Alban Hennen

New glass fibers having an average length of about 100 to 400 &mgr;m and an apparent density of about 1 to 0.2 g/cm,are produced by spinning glass fibers, comprising spinning glass fibers into bundles, cooling with liquid to form wet bundles, directly cutting such bundles in the wet state, without previous drying, grinding said bundles to milled glass fibers in a high-efficiency mixer with the addition of a liquid, and then drying. The fibers are especially suited for filling polyurethanes by the PUR-RIM process.

Process for the manufacture of milled glass fibers

A pasty composition for the room temperature crosslinking and curing of a vulcanizable organopolysiloxane, comprising a crosslinking agent for an organopolysiloxane, a curing catalyst therefor, and about 3-40% by weight of the total amount of the pasty composition of active hydrophilic silica as a thickener. The pasty composition may additionally contain up to about 40% by weight of at least one inactive filler. Advantageously, the organopolysiloxane is in one tube and the pasty composition is in another; lengths of material are squeezed out in easily ascertained proportions and are mixed in the presence of water, e.g. water vapor in the atmosphere, the mixture setting to a silicone rubber.

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Odenthal-Osenau, Germany

Heinz Goller