Abstract: The present invention relates to a process for the production of diorganyloxyorganosilyl- or triorganyloxysilyl-terminated poly(di-organosiloxanes) by reaction of .alpha.,.omega.-dihydroxypoly(diorganosiloxanes) with alkoxysilanes in the presence of catalytically active strong alkali metal bases.

Abstract: Polysiloxane compositions which harden in the presence of moisture by elimination of alcohols, which have high stability in storage while unvulcanized in the absence of moisture, which exhibit good adhesion to substrates, and which are improved by the presence of stabilizing silyl derivations of N-methyl benzamide contain:(A) 100 parts by weight of a polydimethyl siloxane which contains terminal diorganyloxyorganosilyl or triorganyloxylsilyl groups and which has a viscosity of 0.1 to 100 Pas,(B) 0 to 100 parts by weight of an .alpha.,.omega.-bis(trimethylsiloxy)-polydimethyl siloxane which has a viscosity of from 0.04 to 10 Pas,(C) 0 to 5 parts by weight of an alkoxysilane having the formulaR.sup.1.sub.a Si(OR.sup.2).sub.4-a,in whichR.sup.1 is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl or C.sub.5 -C.sub.6 aryl;R.sup.2 is C.sub.1 -C.sub.6 alkyl, and a is 0 or 1,(D) 0.

Abstract: A method of minimizing the adherence of ice on substrates which comprises coating said substrates with a polysiloxane composition which changes into a rubbery elastic material in the presence of water or atmospheric moisture which comprises .alpha.,.omega.-dihydroxy-polydiorganosiloxane having a viscosity of about 500 to 2,000,000 centipoise at 20.degree. C. and a cross-linking agent with or without a hardening catalyst.

Abstract: A process for the preparation of triorganooxysilyl- or diorganooxyorganosilyl-terminated poly(diorganosiloxanes) or formulations containing such siloxanes comprising reacting .alpha.,.omega.-dihydroxypoly(diorganosiloxanes) with tetraorganyloxysilanes or triorganyloxyorganosilanes in the presence of an ammonium carbamate catalyst of the formula I ##STR1## wherein, R represents a hydrocarbon radical with 1-20 C atoms or an H atom, and where identical or different R radicals are in the molecule.The products produced by this process can be employed in the preparation of one-component silicone paste which harden into elastomers in the presence of moisture.

Abstract: In a polydiorganosilixane composition which is capable of storage in the absence of moisture and can be cured at ambient temperature under the action of water or moisture to give elastomers, the composition comprising a diorganosiloxane having reactive terminal groups, a diorganosilane having groups which are sensitive to hydrolysis, a cross-linking agent, and optionally fillers which have a thixotropic effect, condensation catalysts and/or other known auxiliaries, the improvement which comprises employing as the silane (a) a silane of the formulaRR.sup.1 Si(NR.sup.2 R.sup.3).sub.2plus (b) an organosilane of the formulaRSi (O--N.dbd.R.sup.4).sub.3in whichR, R.sup.1, R.sup.2 and R.sup.3 each independently is alkyl, aryl, aralkyl and vinyl groups, orR.sup.2 and R.sup.3 together can be an alkanediyl radical having up to 8 C atoms or hydrogen, andR.sup.4 is an R.sup.2 R.sup.3 C group having up to 8 C atoms.

Abstract: In a polysiloxane molding composition which in the presence of water crosslinks to an elastomer and which comprises(A) an .alpha.,.omega.-dihydroxyorganopolysiloxane with a viscosity of about 500 to 2,000,000 cP,(B) a crosslinking agent, and(C) a reinforcing filler,the improvement which comprises including therein in about 0.1 to 10% by weight a silicon compound containing at least 3 alkoxy groups and preferably of the formulaR.sub.n Si(Alkoxy).sub.4-nin whichR is alkyl with 1 to 10 carbon atoms,Alkoxy has 1 to 4 carbon atoms, andn is 0 or 1,whereby the elastomer ultimately produced exhibits improved direct adhesion to various substrates.

Abstract: The present invention relates organopolysiloxane molding compositions which are capable of storage in the absence of moisture and which crosslink to give elastomers after the admission of water or steam, and are based on .alpha.,.omega.-dihydroxyorganopolysiloxanes and substances which produce crosslinking, a short-chain siloxane of the general formula ##STR1## being added, in addition to customary additives.