Abstract: Compositions, stable in the absence of oxygen, are formed by mixing the following substantially in the absence of oxygen:(A) 100 parts by weight of at least one mercapto-functional organosiloxane containing at least two mercapto-functional substituents per molecule;(B) a catalytic amount of an iron carbonyl compound catalyst selected from the group consisting of Fe(CO).sub.5, Fe.sub.2 (CO).sub.9, Fe.sub.3 (CO).sub.12, dicyclopentadienyldiiron tetracarbonyl, butadieneiron tricarbonyl and cyclohexadieneiron tricarbonyl, preferably from 0.1 to 6 parts by weight of catalyst per 100 parts by weight of part (A);(C) optionally, at least one filler; and(D) 0.1 to 6 parts by weight per 100 parts by weight of a redox compound such as copper (II) sulfate or iron (III) oxide.The compositions polymerize or cure to form higher molecular weight products upon exposure to oxygen.

Abstract: Compositions which are stable in the absence of oxygen are obtained by mixing the following substantially in the absence of oxygen(A) 100 parts by weight of an ingredient selected from either (1) at least one mercapto-functional copolymer, said copolymer containing both silicon-free organic segments and organosiloxane segments or (2) a mixture of at least two different types of components selected from the following types (a) at least one copolymer as described in (A)(1) above, (b) at least one silicon-free mercapto-functional organic compound and (c) at least one mercapto-functional organosilane or organosiloxane;(B) 0 to 200 parts of at least one filler; and(C) a catalytic amount, preferably from 0.1 to 6 parts, of a metal carbonyl catalyst selected from the group consisting of Fe(CO).sub.5, Fe.sub.2 (CO).sub.9, Fe.sub.3 (CO).sub.12, dicyclopentadienyldiiron tetracarbonyl, butadieneiron tricarbonyl, cyclohexadieneiron tricarbonyl, Ni(CO).sub.4, dicyclopentadienyldinickel dicarbonyl, Mn.sub.2 (CO).sub.

Abstract: The complex formed between a pentavalent antimony halide and an organic phosphate ester has been found to be an effective catalyst for cationic polymerization reactions.

Abstract: Oxygen curable compositions are provided by mixing mercaptoorganopolysiloxane, aliphatically unsaturated polydiorganosiloxane and a metal salt of a carboxylic acid, where the metal is iron, manganese, or nickel.

Abstract: Epoxy functional diorganosiloxane fluids are combined with bis-aryl iodonium salts, particularly linear alkylate bis-dodecylphenyl iodonium salts to form a silicone coating composition effective for rendering surfaces non-adherent to other surfaces which would normally adhere thereto, and which will cure to a final non-adherent state upon brief exposure to ultraviolet radiation. Adhesion of the silicone coating to a substrate can be improved with the addition of .beta.-(3,4-epoxycyclohexyl)ethyltrimethoxy silane.

Abstract: The invention provides a novel class of organopolysiloxane compounds having at least one benzoin group represented by the general formula ##STR1## in which Ph is a phenyl group and R is a hydrogen atom or an alkyl group, bonded to the silicon atom in a molecule. The benzoin-bonded organopolysiloxane compounds can readily be prepared by the dehydrohalogenation, dehydrogenation, dehydration or dealkoholation condensation reaction between a corresponding organopolysiloxane having silicon-bonded halogen atoms, hydrogen atoms, hydroxy groups or alkoxy groups and an .alpha.-substituted or unsubstituted benzoin compound in the presence of a suitable reaction promotor or a condensation catalyst.

Abstract: Mixing mercaptoorganopolysiloxanes with a selected transition metal compound, an organic peroxide and optionally a filler, provides useful new compositions such as materials curable to elastomers at room temperature.

Abstract: Sulfur-containing organosiloxanes are prepared and can be used in the preparation of storage stable compositions curable to elastomers at room temperature. The organopolysiloxanes are alkoxy functional siloxane polymers characterized by a non-oxygen containing linkage between alkoxysilyl groups and the siloxane polymer chain. The non-oxygen linkage contains sulfur.

Abstract: Dry granular silicon acid, an organic polyol and a silicon tetrahalide are mixed simultaneously to produce an organic halosilicon acid resinous product.

Abstract: Aromatic onium salts, such as diaryliodonium salts, have been found to be effective thermal initiators for the polymerization of a variety of cationically polymerizable materials including epoxides, cyclic ethers, phenol formaldehyde resins, etc., when used in combination with various cocatalysts such as organic acids and copper salts.

Abstract: There is provided by the present invention a process for producing a solventless silicone resin having a viscosity at 100% varying from 200 to 5,000 centipoise at 25.degree. C., comprising adding a mixture of water and alcohol to the desired organochlorosilanes taking the silicone alkoxylate and washing it repeatedly with alcohol until the acid content is at least below 1000 parts per million, adding an alkali metal hydroxide to reduce the acidity of the silicone alkoxylate such that it does not exceed 100 parts per million, and then adding sufficient water such that the amount of water that is added is between 0.2 to 0.8 moles of water per mole of hydrocarbonoxy radicals in such silicone hydrolyxate. The excess alcohol and water is stripped off to give the solventless silicone resin of the instant invention having an organo to Si ratio varying from 1.1 to 1.9, having a silanol content varying from 1 to 4% by weight and a hydrocarbonoxy content that varies from 7 to 14% by weight.

Abstract: Abrasion resistant coatings derived from epoxy-terminated silanes are desirable when formed by curing in the presence of PF.sub.5, SbF.sub.5, or HSbF.sub.6.

Abstract: Onium catalysts of Group Va, VIa, and VIIa atoms have been found to be radiation activatable catalysts for the hydrolysis of silanes. Anhydrous compositions comprising silanes and the catalyst are storage stable.

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.