Abstract: Diorganopolysiloxane homo- and copolymers having a viscosity from 50 to 200,000,000 centipoise at 25.degree. C, are produced by (a) reacting a composition of (i) a first cyclic siloxane having 3 to 6 units alone or admixed with (ii) a second cyclic siloxane having 3 to 6 units, (i) being present in an amount of 30 to 100 mol % of the composition, at a temperature in the range of 90.degree. to 150.degree. C and in the presence of 5 to 500 parts per million, as alkali metal hydroxide of a catalyst comprising alkali metal hydroxide or a silanolate of an alkali metal hydroxide complexed with a low molecular weight polymer of ethylene oxide (polyethylene glycol) soluble in the cyclic siloxanes. Especially useful products of the process are homopolymers and copolymers including siloxane chain units of the formula R R.sup.1 SiO wherein R.sup.1 is alkyl, halogenated alkyl or cycloalkyl, and preferably, perfluoroalkyl, and R is the same as R.sup.1 and, in addition, vinyl or phenyl.

Abstract: A novel process for polymerization or copolymerization of monomers is described, according to which the reaction is carried out in the presence of an anionic initiator and a macroheterocyclic complexing agent of formula ##STR1## in which: EACH R.sub.1 is a hydrogen atom, a hydrocarbon group or an alkoxycarbonyl group, or the two R.sub.1 together can form a group of the general formula: ##STR2## THAT IS TO SAY FORMING A THIRD BRIDGE BETWEEN THE TWO NITROGEN ATOMS IN THE MOLECULE, A is a hydrocarbon group,D is an oxygen or sulfur atom or a hydrocarbon group, with the proviso that at least two of the groups D are oxygen or sulfur atoms and that, if each R.sub.1 is hydrogen, a hydrocarbon group or an alkoxycarbonyl group, one of these two groups D is oxygen or sulfur and the other is oxygen,n and p are integers ranging from 1 to 3, andm is 2 or 3.

Abstract: Alpha-alkoxy-omega-siloxanols, R'O(R.sub.2 SiO).sub.x H, are produced by contacting cyclic siloxanes with alcohols under mild conditions. For example, hexamethylcyclotrisiloxane heated at reflux in methanol for four hours gives 5-methyoxyhexamethyltrisiloxan-1-ol in high yield. The reaction proceeds more rapidly in the presence of weak acids or bases. The products are useful as coupling agents, as antistructure agents and filler-treating agents for silicone elastomers.

Abstract: A fine granular oxidated silicon compound will react chemically with organic monohydroxy compounds in the presence of an alkali catalyst to produce organic silicate compounds.

Abstract: Self-bonding, low modulus, one-package room temperature vulcanizing silicone compositions, curable in the presence of moisture, comprise (a) a silanol chain-stopped polydiorganopolysiloxane; (b) a cross-linking silane; and (c) a silanol reactive organometallic ester compound of a metal, the compound having radicals attached to the metal atom, at least one of the radicals being a substituted or unsubstituted hydrocarbonoxy radical, attachment being through M--O--C linkages, where M is the metal, and any remaining valences of M are satisfied by other organo radicals attached to M through such linkages, or an --OH, --O-- or M--O--M linkage, the weight ratio of components (c) to (b) always being at least 0.5 to 1. Such compositions have unusually high adhesion to a variety of difficulty bondable substrates.