Abstract: Heat stable silicone fluids are prepared by adding to silicone fluids from 10 to 50 percent by weight of an aminofunctional silicone fluid based on the total weight of the composition. The resultant composition is stable at temperatures above 400.degree. F. for more than 300 hours.

Abstract: The invention relates to a process for preparing thiofunctional polysiloxane polymers which comprises equilibrating in the presence of an acid catalyst a mixutre containing (1) an organopolysiloxane having at least four silicon atoms per molecule and (2) a thiofunctional polysiloxane copolymer having at least one unit of the formula ##EQU1## and the other units are selected from the formulas R.sub.2 SiO, R.sub.3 SiO.sub.0.5, and RO.sub.0.5, wherein R is a monovalent hydrocarbon radical having from 1 to 18 carbon atoms, R' is a substituted or unsubstituted divalent, trivalent or tetravalent hydrocarbon radical free of aliphatic unsaturation having from 1 to 18 carbon atoms, hydrocarbon ether, hydrocarbon thioether, hydrocarbon ester and hydrocarbon thioester radicals, R" is a monovalent hydrocarbon radical or hydrogen, f is a number of from 1 to 3, g is a number of from 0 to 1 and the sum of f+g is from 1 to 3 and y is a number of from 1 to 3.

Abstract: The invention relates to novel epoxy-functional polysiloxane polymers having the general formula ##STR1## in which A is a radical containing at least one epoxy group, R is a monovalent hydrocarbon radical having up to 18 carbon atoms and a is a number of from 1 to 20,000. These novel polymers may be prepared by equilibrating silanes containing at least one epoxy group with an organopolysiloxane in the presence of a base catalyst.

Abstract: Chlorendimidosilicon compounds of the formula ##STR1## where R is a monovalent hydrocarbon radical or a substituted monovalent hydrocarbon radical, R' is a divalent hydrocarbon radical or a divalent hydrocarbonoxy radical in which the oxygen is in the form of an ether linkage, R" which may be the same or different is a monovalent hydrocarbon radical or a hydrocarbonoxy radical, x is a number of from 0 to 20,000, y is a number of from 0 to 3, and a process for preparing the same.

Abstract: Modified organopolysiloxane compositions containing in situ generated particulate matter and a method for preparing the same which comprises polymerizing organic monomers having aliphatic unsaturation in the presence of vinyl containing organopolysiloxanes and free radical initiators at an elevated temperature to form a composition in which one or more of the organopolysiloxane molecules have organic groups grafted thereto through a carbon-to-carbon linkage. The resultant composition may be cured to an elastomeric solid by combining the composition obtained from the polymerization with organosilicon compounds having an average of more than two hydrogen atoms per molecule and a catalyst which promotes the addition of SiH groups to vinyl groups.

Abstract: This invention relates to a composition containing (A) a bridging agent, (B) a hydrocarbon oil and (C) an organopolysiloxane fluid, in which the organopolysiloxane fluid (C) is immiscible with hydrocarbon oil (B) in the absence of bridging agent (A) and a process for treating organic fibers therewith. The bridging agent is obtained from the reaction of a hydrolyzate of a diorganodihalosilane with a primary, secondary or tertiary alcohol, in which the hydrocarbon group of the alcohol is a saturated or unsaturated branched chain or an unsaturated linear chain and contains from 12 to 28 carbon atoms.

Abstract: A method for accelerating the surface curing of a room temperature vulcanizable organopolysiloxane composition which comprises contacting the organopolysiloxane composition with carbon dioxide in excess of that present in the atmosphere.

Abstract: A modified organopolysiloxane composition containing in situ generated particulate matter and a method for preparing the same which comprises reacting an organohydrogenpolysiloxane with an organic monomer in the presence of a free radical initiator at an elevated temperature. The resultant composition may be combined with vinyl containing compounds having at least two vinyl groups per molecule and a catalyst which promotes addition of SiH groups to vinyl groups to form elastomers.

Abstract: Alkali metal terminated organic polymers are reacted with silicon containing compounds having aliphatic unsaturation to produce a new class of reactive silylated organic polymers. These silylated organic polymers can in turn be reacted with cyclic siloxanes to produce silylated organic-organopolysiloxane block copolymers which are useful as protective coatings, surfactants and as elastomers.

Abstract: Alkali metal terminated organic polymers are reacted with silicon containing compounds having aliphatic unsaturation to produce a new class of reactive silylated organic polymers. These silyated organic polymers can be in turn reacted with cyclic siloxanes to produce silylated organic-organopolysiloxane block copolymers which are useful as protective coatings, surfactants and as elastomers.

Abstract: Compositions that may be used as primers for bonding silicone elastomers to porous substrates which are obtained from the reaction of an acrylate and an acryloxyalkylakoxysilane in the presence of a free radical initiator and an organic solvent.

Abstract: Oil resistant modified organopolysiloxane compositions are prepared by polymerizing an acrylic ester and an acrylic nitrile in the presence of an organopolysiloxane and a free-radical initiator at an elevated temperature. These modified compositions may be thermally cyclized to impart improved oil resistance to these already oil resistant compositions. The resultant compositions may be cured to form oil resistant silicone elastomers.

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: An organopolysiloxane composition which is stable under anhydrous conditions, but when exposed to atmospheric moisture cures to an elastomeric solid comprising (1) a hydrocarbonoxy terminated linear organopolysiloxane having at least two hydrocarbonoxy groups per molecule, (2) an organosilicon compound or partial hydrolyzates thereof containing at least two hydrocarbonoxy groups and (3) a titanium ester or partial hydrolyzates thereof in which the hydrocarbonoxy groups linked to the organopolysiloxane, organosilicon compound and the titanium ester groups are the same.

Abstract: Aqueous coating composition for applying to rubber articles comprising a latex binder, an emulsifying agent, a filler, a thickening agent and a compound which imparts shear stability to the composition. The composition is applied to the surface of rubber articles prior to molding to impart release properties thereto, to improve the appearance and other characteristics such as weatherability.

Abstract: Alkali metal terminated organic polymers are reacted with silicon containing compounds having aliphatic unsaturation to produce a new class of reactive silylated organic polymers. These silylated organic polymers can in turn be reacted with cyclic siloxanes to produce silylated organic-organopolysiloxane block copolymers which are useful as protective coatings, surfactants and as elastomers.

Abstract: A release composition for bituminous materials comprising a mixture of an organopolysiloxane and an aminofunctional silicon fluid.

Abstract: Alpha,omega-siloxanediols are prepared from siloxanes by a two-step process. In the first step, the siloxane is converted to a linear alpha,omega-diacyloxysiloxane by heating with an acid anhydride and a carboxylic acid in the presence of acid clay. The diacyloxysiloxane is hydrolyzed to the siloxanediol by heating with an aqueous solution of a weak base.

Abstract: The invention relates to a process for preparing thiofunctional polysiloxane polymers which comprises reacting a disiloxane and/or a hydroxy or hydrocarbonoxy containing silane or siloxane with a cyclic trisiloxane in the presence of an acid catalyst wherein at least one of the above organosilicon compounds contain a thiol group. These thiofunctional polysiloxane polymers are useful as metal protectants and as release agents, especially on metal substrates.

Abstract: The invention relates to a cobalt-platinum catalyst for promoting the addition of .tbd.Si-H compounds to unsaturated organic compounds which comprises reacting platinum dichloride with dicobalt octacarbonyl in the presence of an inert solvent at a temperature up to about 52.degree. C.