Abstract: The invention concerns polysiloxane compounds which contain the following components: 1. organopolysiloxane with at least two aliphatic double bonds in the molecule; 2 organopolysiloxane with at least two Si—H groups in the molecule; 3. noble metal catalyst; and 4. hydrophilic modifier of general formula (I) [H2C═CH—A1—(A2)m—X]nB (I), in which A1, A2, X, B, m and n have the meanings given in claim 1. The polysiloxane compounds are stable during storage and are used as dental casting compounds.

Abstract: The present invention relates to storage-stable polysiloxane compositions which give permanently water-wettable elastomers. The polysiloxane compositions of the present invention which vulcanize to yield elastomers are useful as dental impression compositions.

Abstract: Hydroxyl terminated diorganopolysiloxanes may be crosslinked with a mixture containing (1) a product obtained from the reaction of (a) silicic acid esters with (b) an organic tin compound of the formulaR.sub.2 Sn(OCOR.sup.1).sub.2 (I),where R represents a butyl or an octyl radical and R.sup.1 represents a monovalent hydrocarbon radical having from 1 to 15 carbon atoms, in which at most one of the valences of the carbon atom that is bonded to the carboxyl group is saturated by a carbon atom other than that of the carboxyl group, and (2) an organic tin compound of the formulaR.sub.2 Sn(OCOR.sup.2).sub.2 (II),where R is the same as above and R.sup.2 represents a monovalent aliphatic hydrocarbon radical having from 3 to 15 carbon atoms, in which at least two of the valences of the carbon atom that is bonded to the carboxyl group are saturated by two carbon atoms other than that of the carboxyl group.

Abstract: Hydroxyl terminated diorganopolysiloxanes may be crosslinked with a mixture containing (1) a product obtained from the reaction of (a) silicic acid esters with (b) an organic tin compound of the formulaR.sub.2 Sn(OCOR.sup.1).sub.2 (I),where R represents a butyl or an octyl radical and R.sup.1 represents a monovalent hydrocarbon radical having from 1 to 15 carbon atoms, in which at most one of the valences of the carbon atom that is bonded to the carboxyl group is saturated by a carbon atom other than that of the carboxyl group, and (2) an organic tin compound of the formulaR.sub.2 Sn(OCOR.sup.2).sub.2 (II),where R is the same as above and R.sup.2 represents a monovalent aliphatic hydrocarbon radical having from 3 to 15 carbon atoms, in which at least two of the valences of the carbon atom that is bonded to the carboxyl group are saturated by two carbon atoms other than that of the carboxyl group.