Abstract: The present invention describes uncured fluorocarbon elastomer base compositions and cured fluorocarbon elastomer compositions comprising a fluorocarbon elastomer, an amorphous silicone resin, and optionally a polydiorganosiloxane gum or a hydrocarbon polymer elastomer. The cured fluorocarbon elastomers typically contain additional components such as an acid acceptor, a cure agent, and a filler. The cured compositions have high strength, low temperature flexibility, high solvent resistivity, and low fuel permeability.

Abstract: A process for preparing a cured, fiber-reinforced composite comprises (I) blending an aminofunctional silicone resin containing monophenyl siloxy units and aminofunctional siloxy units, an epoxy resin and a hardener for the epoxy resin such as an aromatic diamine, (II) impregnating reinforcing fibers with the blend, (III) laying up at least two layers of the impregnated fibers, and (IV) heating the layed-up laminate at a temperature and time sufficient to cure the epoxy resin.

Abstract: A cured, fiber-reinforced composite is prepared by blending an amino-functional silicone resin containing monophenyl siloxy units and amino-functional siloxy units, an epoxy resin, a hardener for the epoxy resin and an aromatic oligomer such as a polyether optionally with reactive primary amine groups, impregnating fibers into said blend, laying up at least two layers of the impregnated fibers, and heating the layed-up laminate at a temperature and time sufficient to cure the epoxy resin.

Abstract: A fiber-reinforced composite is prepared from fibers embedded in a composition comprising cured epoxy resin(s), an aromatic oligomer such as a polyether optionally with reactive primary amine groups, and an amino-functional silicone resin with monophenyl siloxy units and amino-functional siloxy units.

Abstract: This invention relates to fluorohydrocarbon polymers which are modified by the incorporation of substitiuents bearing a functional group such as vinyl, allyl, acrylate, alkoxysilane, amido, sulfonic acid salt, pyridine, carboxylic ester, and carboxylic salt. The functional groups may be further reacted to obtain branching, grafting, or crosslinking of the polymers. Copolymers of vinylidene fluoride and hexafluoropropene such as VITON A rubber and KYNAR FLEX 2801 plastomer, are typical of the class of fluorohydrocarbon polymers which are modified to obtain the new materials of this invention.

Abstract: A fiber-reinforced composite is prepared from fibers embedded in a cured epoxy resin(s) containing therein a amino-functional silicone resin with monophenyl siloxy units and amino-functional siloxy units.

Abstract: This invention relates to fluorohydrocarbon polymers which are modified by the incorporation of substitiuents bearing a functional group such as vinyl, allyl, acrylate, alkoxysilane, amido, sulfonic acid salt, pyridine, carboxylic ester, and carboxylic salt. The functional groups may be further reacted to obtain branching, grafting, or crosslinking of the polymers. Copolymers of vinylidene fluoride and hexafluoropropene such as VITON A rubber and KYNAR FLEX 2801 plastomer, are typical of the class of fluorohydrocarbon polymers which are modified to obtain the new materials of this invention.

Abstract: A composition useful in the fabrication of fiber-reinforced composites is prepared from a blend of an epoxy resin, a hardener for the epoxy resin, an aromatic oligomer and an aminofunctional silicone resin containing monophenyl siloxy units and aminofunctional siloxy units.

Abstract: This invention relates to an improved method of preparing the active telogen CF.sub.3 CFClI. The process comprises reacting chlorotrifluoroethylene, iodine, and iodine pentafluoride in the presence of an aluminum bromide catalyst at a temperature above about 25.degree. C.

Abstract: This invention relates to certain new high modulus silicones, toughened epoxy thermoset resin systems made from those silicones, and composites that are prepared from the new toughened epoxy resin systems. The silicone resins are specifically monophenyl-containing polysiloxanes.

Abstract: The present invention relates to a novel, catalyst-free method for preparing brominated telomers of chlorotrifluoroethylene. The process comprises reacting chlorotrifluoroethylene with a brominated telogen at a temperature in excess of 200.degree. C. for a time sufficient to produce the telomer.

Abstract: This invention relates to certain new high modulus silicones, toughened epoxy thermoset resin systems made from those silicones, and composites that are prepared from the new toughened epoxy resin systems. The silicone resins are specifically monophenyl-containing polysiloxanes.

Abstract: A matrix for delivery of active substances such as fragrances and pheromones into the atmosphere is provided which matrix is active substance permeable (including to hydrophilic substances) and is formed of a copolymer which can be softened sufficiently at temperature between 45.degree. C. and 160.degree. C. to incorporate the substances therein without damage caused by heat or chemical reactions, the matrix being formed of a substantially linear block copolymer which is a reaction product of a polydiorganosiloxane which forms soft segments in said reaction product and a diisocyanate which forms hard segments, said copolymer having a glass transition temperature between 45.degree. C. and 160.degree. C. said soft segments comprising from 70 to 99 percent by weight, based on the weight of said copolymer, the average molecular weight of the copolymer being between 15,000 and 500,000.

Abstract: This invention provides novel liquid organosiloxane/graft-oxyalkylene copolymers that cure to yield solid materials. The copolymers can be cured by heating them in the presence of suitable curing agents, by exposure to ultraviolet radiation in the presence of a photoinitiator, or by exposure to an electron beam. The copolymers can be combined with solubilized, ionizable lithium salts to yield curable electroconductive compositions suitable for use as electrolytes in storage batteries.

Abstract: A transdermal drug delivery system, is provided which includes, in combination, an impermeable backing member, a release rate controlling membrane, and, a reservoir containing a medicinally active ingredient; the improvement in such system is based on the fact that said membrane is heat and pressure sealed to said backing without the use of a separate adhesive and is formed of a substantially linear block copolymer which is a reaction product of an amino functional polydiorganosiloxane which forms soft segments in said reaction product and a diisocyanate which forms "hard" segments, said copolymer having a glass transition temperature between 50.degree. C. and 200.degree. C. said soft segments comprising from 60 to 90 percent by weight, based on the weight of said copolymer.

Abstract: Polysiloxane-polyurea block copolymers are prepared from isocyanate and aminophenoxy functional polyorganosiloxane. These block copolymers are hydrolytically stable and exhibit improved thermal stability compared to aminoalkyl functional polyorganosiloxanes.

Abstract: A matrix for delivery of active substances such as fragrances and pheromones into the atmosphere is provided which matrix is active substance permeable (including to hydrophilic substances) and is formed of a copolymer which can be softened sufficiently at temperature between 45.degree. C. and 160.degree. C. to incorporate the substances therein without damage caused by heat or chemical reactions, the matrix being formed of a substantially linear block copolymer which is a reaction product of a polydiorganosiloxane which forms soft segments in said reaction product and a diisocyanate which forms hard segments, said copolymer having a glass transition temperature between 45.degree. C. and 160.degree. C. said soft segments comprising from 70 to 99 percent by weight, based on the weight of said copolymer, the average molecular weight of the copolymer being between 15,000 and 500,000.

Abstract: This invention provides novel liquid organosiloxane/graftoxyalkylene copolymers that cure to yield solid materials wherein at least a portion of the pendant oxyalkylene units are terminated with an acrylate group. The copolymers can be cured by heating them in the presence of suitable curing agents, by exposure to ultraviolet radiation in the presence of a photoinitiator, or by exposure to an electron beam. The copolymers can be combined with solubilized, ionizable lithium salts to yield curable electroconductive compositions suitable for use as electrolytes in storage batteries.

Abstract: A transdermal drug delivery system, is provided which includes, in combination, an impermeable backing member, a matrix containing a medicinally active ingredient, and a pressure sensitive adhesive for affixing the system to the skin of a patient; the improvement in such system is based on the fact that said matrix is drug permeable (including to hydrophilic drugs) and is formed of a copolymer which can be softened sufficiently at temperature between 45.degree. C. and 160.degree. C. to incorporate the drugs therein without damage caused by heat or chemical reactions, the matrix being formed of a substantially linear block copolymer which is a reaction product of a polydiorganosiloxane which forms "soft" segments in said reaction product and a diisocyanate which forms "hard" segments, said copolymer having a glass transition temperature between 45.degree. C. and 160.degree. C.

Abstract: The reduction in tensile strength exhibited in high humidity environments by "soft" polyurethanes prepared from aliphatic or cycloaliphatic diisocyanates can be substantially reduced if the molar ratio of diisocyanate and chain extender to isocyanate-reactive species other than said chain extender in the reaction mixtures from which said polyurethanes are prepared is at least 4.