Abstract: Compositions which crosslink to form elastomers and are based on(A) hollow polymer bodies,(B) addition-crosslinkable organosilicon compounds, and(C) organic sulfur compounds.

Abstract: The present invention relates to compositions which crosslink to give elastomers, comprising;(A) a polyorganosiloxane (I) with at least two alkenyl groups per molecule and a metallic catalyst (IV) and(B) a polyorganosiloxane (II) with at least two silicon-bonded hydrogen atoms and an organic sulfur compound (III).

Abstract: A method for impregnating organic fibers which comprises applying a composition containing (1) an organopolysiloxane having silicon-bonded condensable groups and containing diorganosiloxane units in which the two SiC-bonded organic radicals are monovalent hydrocarbon radicals and also contains two monovalent SiC-bonded radicals having a basic nitrogen group; (2) an organopolysiloxane having at least 3 Si-bonded hydrogen atoms per molecule; and (3) a catalyst which promotes the condensation of the silicon-bonded condensable groups, in which the SiC-bonded radicals having a basic nitrogen group are present in the organopolysiloxane (1) as monoorganosiloxane units and as diorganosiloxane units.

Abstract: A process for preparing organofunctional organopolysiloxanes which comprises reacting a cyclic diorganopolysiloxane with a silane having a SiC-bonded monovalent organic radical with at least one functional group and at least one SiOC-bonded monovalent hydrocarbon radical which can be substituted by an ether oxygen atom, or with an oligomer of such a silane having a maximum of 10 silicon atoms per molecule, in the presence of a quaternary ammonium hydroxide.