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: Films and coatings formed from a specified class of organosiloxane/urethane copolymers are unique by virtue of their high permeability to volatile ingredients in the form of aqueous compositions and their inertness to the ingredients of these compositions. Containers wherein at least a portion of the walls comprise films or coatings formed from these copolymers are used to achieve the controlled release of volatile fragrances and biologically active agents from aqueous compositions confined within the container into the adjacent atmosphere.

Abstract: In accordance with the present method a ketoximoaminoalkylsilane is prepared by reacting a ketoxime of the formula RR'C.dbd.NOH with a silane of the formula ##STR1## where R and R' represent monovalent hydrocarbon radicals, each of the two substituents represented by R" is, individually, a monovalent hydrocarbon radical, a monovalent fluorinated hydrocarbon radical or an alkoxy radical, R"" represents a monovalent hydrocarbon radical or a hydrogen atom, and R'" represents an alkylene radical containing from 3 to 6 carbon atoms.

Abstract: This invention pertains to novel silanes wherein the silicon atom is bonded to at least one ketoximo group and a carbon atom of a primary or secondary amino group. The remaining substituents on the silicon atom are alkoxy groups and/or monovalent hydrocarbon radicals.

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.

Abstract: New acrylofunctional silicones and a method for their synthesis are disclosed. The acrylofunctional silicones are the product of reacting aminoalkyl or diaminoalkyl silicones with isocyanatoacrylates. The acrylofunctional silicones are useful coating materials, and can be cured by ultraviolet radiation.

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.