Abstract: A pattern forming material contains a siloxane polymer having the general formula: ##STR1## [wherein R, R' and R" are the same or different and are respectively one member selected from hydrogen, an alkyl group or a phenyl group; X is one member selected from fluorine, chlorine, bromine, iodine and a --CH.sub.2 Y group (wherein Y is one member selected from chlorine, fluorine, bromine, iodine, an acryloyloxy group, a methacryloyloxy group, and a cinnamoyloxy group); and l, m and n are respectively 0 or a positive integer, l and m not being simultaneously 0]. The material has a high sensitivity to high-energy radiation, a high contrast, and an excellent resistance to reactive ion etching under oxygen gas. The material is conveniently used as a negative resist for forming a submicron pattern having a high aspect ratio.

Abstract: This invention relates to fluoroalkyloxyalkyl diorganopolysiloxanes having the general formula ##STR1## where R.sup.1 represents fluoroalkyloxyalkyl groups of the general formula--(CH.sub.2).sub.a --O--C.sub.b R.sub.2b Hin which the hydrogen atom is in the beta position to the ether oxygen, a is 2, 3 or 4; b is an integer having a value of from 1 to 6; R.sup.2 represents an alkyl group having from 1 to 8 carbon atoms whose terminal units may also contain an amino or a thiol group, or an alkenyl group having 2 or 3 carbon atoms, or an aryl group having from 6 to 8 carbon atoms or hydrogen; R.sup.3 represents the group having the formula--(CH.sub.2).sub.c --C.sub.d F.sub.(2d-e+l) Hal.sub.e ,in which Hal represents a terminal chlorine, bromine or iodine atom, c is 2, 3 or 4; d is an integer having a value of from 1 to 18; e is 0 or 1; R.sup.4, R.sup.5 and R.sup.6 are the same as R.sup.

Abstract: A prosthesis for subcutaneous implantation in a patient comprising a flexible sac and a silicone gel contained within the sac. The wall of the sac is comprised of at least one continuous layer of silicone elastomer which substantially impedes the migration of said silicone gel from the sac.

Abstract: Fiber-treating compositions are described which durably provide water repellency and oil repellency for the treated fiber. These compositions comprise a siloxane component bearing fluorinated hydrocarbon radicals, unsubstituted hydrocarbon radicals and silicon-hydride atoms, and a dehydrogenation condensation catalyst. Curing of the compositions occurs by a dehydrogenation condensation reaction between the silicon-hydride atoms and/or between the silicon-hydride atoms and the hydroxyl radical of an optionally added hydroxyl-endblocked organopolysiloxanes.

Abstract: A process for preparing organopolysiloxanes having SiC-bonded organofunctional groups, which comprises reacting an organopolysiloxane containing SiC-bonded hydroxyl and/or alkoxy groups and having an average of about 0.85 to 1.8 SiC-bonded monovalent hydrocarbon radicals or halogenated monovalent hydrocarbon radicals for each Si atom, with an organosilicon compound containing alkoxy groups and/or siloxane oxygen groups and at least one SiC-bonded organofunctional radical per molecule in the presence of an organic solvent and a basic catalyst.The resultant organopolysiloxanes having SiC-bonded organofunctional groups may, for example, be used for preparing modified polymers by copolymerizing the organopolysiloxanes with a monomer containing an aliphatic double bond, such as styrene or hydroxyethyl methacrylate, or by reacting the organopolysiloxanes with an additional polymer such as an epoxy resin.

Abstract: Thermally stable electrically insulating polymers are obtained from aromatic silanes by low power, radio frequency glow discharge polymerization at elevated temperature and low vapor pressure.

Abstract: The invention provides a novel diorganopolysiloxane compound composed of dimethysiloxane units, methyl (2-perfluoroalkylethyl)siloxane units and methyl acyloxyalkylsiloxane units. The novel diorganopolysiloxane compounds of the invention have excellent lubricating properties so that they are useful as an additive ingredient in various materials such as coating compositions, magnetic layer of recording tapes and the like where lubricity or mold releasability is essential.

Abstract: A fluorosilicone polydimethylsiloxane equilibration chainstopper and process for making same are disclosed. The chainstopper has a fluorosilicone content in the range of 30 mole percent to 60 mole percent and is a preferred chainstopper in equilibration reactions in the production of vinyl-stopped fluorosilicone polydimethylsiloxane copolymers.

Abstract: A self-bonding silicone rubber composition comprising a vinyl-terminated polysiloxane polymer, a hydride siloxane cross-linking agent, a platinum catalyst and as the self-bonding additive, the partial hydrolysis product of an aliphatically unsaturated hydrolyzable alkoxy silane.

Abstract: Process for preparing platinum catalyzed SiH-olefin silicone compositions using hydroperoxy-containing inhibitors.

Abstract: A process for producing a fluorosilicone polymer comprising reacting a fluoro-substituted cyclic polysiloxane with a polymerization catalyst and as the novel ingredient a low molecular weight silanol terminated diorganopolysiloxane polymer and then after the polymer is formed, neutralizing the catalyst. In another embodiment of the present invention, there can be utilized in the polymerization reaction a high molecular weight aliphatic alcohol in place of the low molecular weight silanol terminated diorganopolysiloxane polymer.

Abstract: A self-bonding silicone rubber composition comprising a vinyl-terminated polysiloxane polymer, a hydride siloxane cross-linking agent, a platinum catalyst and as the self-bonding additive, the partial hydrolysis product of an aliphatically unsaturated hydrolyzable alkoxy silane.

Abstract: A method for producing triorganosilyl-end stopped diorganopolysiloxane fluids having a viscosity varying from 50 to 2,000,000 centipoise at 25.degree. C. comprising reacting a silanol end-stopped fluoro substituted polymer with a halogenated silane in the absence of base such that the silanol groups at the ends of the polymer are substituted by triorganosilyl groups. The advantage of the above process is that a high yield of the desired fluid is obtained.

Abstract: Novel room temperature curable organopolysiloxane compositions which are stable as ready mixed for a long period of time when kept in an air-tight container and readily curable at room temperature to form rubber-like elastomers when exposed to the moisture-containing air. The composition comprises a diorganopolysiloxane terminated at both chain ends with hydroxy groups, an organosilane having in a molecule 3 or 4 substituted or unsubstituted vinyloxy groups or a partial hydrolysis-condensation product thereof, and an organosilane or an organopolysiloxane having in a molecule at least one monovalent group expressed by the general formula of the type (R.sub.2 N).sub.2 C.dbd.N--, where R is a hydrogen atom or a monovalent hydrocarbon group. The compositions are free from toxicity and offensive odor as well as corrosiveness against various substrate surfaces, especially of metals.

Abstract: Bis(fluoroaliphaticsulfonyl)imides are used as catalysts for the ring-opening polymerization of organocyclosiloxanes to produce lubricants, coatings or rubber precursors.

Abstract: A process for the production of silicic acid heteropolycondensates, wherein at least one hydrolysable silicic acid derivative; at least one substituted silane; optionally at least one functional silane and/or optionally at least one substantially involatile oxide soluble in the reaction medium or at least one compound forming a substantially involatile oxide are condensed in the presence of at least the quantity of water stoichiometrically required for hydrolysis and optionally in the presence of a condensation catalyst and/or a solvent. The polycondensates are useful in the production of membranes and adsorbents.

Abstract: A composition containing diorganopolysiloxanes and copolymers prepared in the presence of these diorganopolysiloxanes in which the copolymers are derived from monomers consisting of at least ethylene and vinyl acetate. The resulting composition exhibits non-slump properties and does not migrate on vertical surfaces even in the absence of fillers.

Abstract: Monomeric polyparaffinsiloxanes end-capped with activated unsaturated groups and polymers and copolymers thereof are disclosed herein for use as contact lenses and biomedical devices with improved properties, such as, oxygen transportability, hydrolytic stability, biological inertness, transparency and improved strength without the use of fillers. The polymer composition comprises a poly(organoparaffinsiloxane) monomer .alpha.,.omega. terminally bonded through divalent hydrocarbon groups to polymerized free radical polymerizably activated unsaturated groups.

Abstract: Monomeric polysiloxanes end-capped with activated unsaturated groups and polymers and copolymers thereof are disclosed herein for use as contact lenses and biomedical devices with improved properties, such as, oxygen transportability, hydrolytic stability, biological inertness, transparency and improved strength without the use of fillers. The polymer composition comprises a poly(organosiloxane) monomer .alpha.,.omega. terminally bonded through divalent hydrocarbon groups to polymerized free radical polymerizably activated unsaturated groups. Contact lenses and biomedical devices i.e. shaped article for use in biomedical applications made therefrom can be "hard" or "soft". This hardness or softness is a function of the comonomer or the molecular weight of the monomers. Preferably the contact lenses and biomedical devices are "soft".The copolymer compositions of the instant invention comprise the polymerization product of the polysiloxane monomers and monomer or monomers containing an activated vinyl group.

Abstract: Novel room temperature curable organopolysiloxane compositions which are stable as ready mixed for a long period of time when kept in an air-tight container and readily curable at room temperature to form rubber-like elastomers when exposed to the moisture-containing air. The composition comprises a diorganopolysiloxane terminated at both chain ends with hydroxy groups, an organosilane having in a molecule 3 or 4 substituted or unsubstituted vinyloxy groups or a partial hydrolysis-condensation product thereof, and an organosilane or an organopolysiloxane having in a molecule at least one monovalent group expressed by the general formula of the type (R.sub.2 N).sub.2 C.dbd.N--, where R is a hydrogen atom or a monovalent hydrocarbon group. The compositions are free from toxicity and offensive odor as well as corrosiveness against various substrate surfaces, especially of metals.

Abstract: A composition of matter which is an aqueous dispersion of an organothiolsilsesquioxane and colloidal silica is used as an adhesion additive for siloxane resins which have a low degree of substitution.

Abstract: A sulfur containing abrasion resistant coating with excellent adhesion to gold and silver surfaces, without concomitant discoloration of the metal, is disclosed. Such coatings are useful for protecting gold and silver surfaces from damage due to weathering and/or mishandling.

Abstract: Heat-resistant, polyorganosiloxane elastomers are prepared by reacting a linear, difunctional polyorganosiloxane with a silicon-containing crosslinking agent and a stannous salt of a monoethylenically unsaturated monohydroxy monocarboxylic acid as the curing catalyst. A filler can optionally be included in the formulation. The present catalysts are unique in that they impart a relatively long working life to the uncured composition yet do not catalyze the depolymerization reaction at elevated temperatures as do conventional organotin catalysts such as dibutyltin dilaurate.

Abstract: Monomeric polysiloxanes end-capped with activated unsaturated groups and polymers and copolymers thereof are disclosed herein for use as contact lenses with improved properties, such as, oxygen transportability, hydrolytic stability, biological inertness, transparency and improved strength without the use of fillers. The polymer composition comprises a poly(organosiloxane) .alpha., .omega. terminally bonded through a divalent hydrocarbon group to a polymerized activated unsaturated group. Contact lenses made therefrom can be, as commonly referred to, "hard" or "soft". This hardness or softness is a function of the comonomer or the molecular weight of the monomers. Preferable the contact lenses are "soft".The copolymer compositions of the instant invention comprise the polymerization product of the polysiloxane monomers and monomer or monomers containing an activated vinyl group. These polymers are employed to make optical products, e.g. contact lenses, intraocular implants, etc.

Abstract: Mixtures obtained by reaction of an .alpha.-arylketone or of an arylaldehyde and the equivalent amount of a base metal in an inert aprotic solvent with a di-, tri- or tetrachlorosilane or a chlorinated polyorganosilane or -siloxane work as initiators for free radical-initiated polymerization reactions.

Abstract: A static dissipating heat curable silicone rubber composition comprising a diorganopolysiloxane polymer, a filler and a peroxide curing catalyst and as the static discharging agent a polyether-polysiloxane copolymer.

Abstract: Organopolysiloxanes are polymerized in the presence of an alkaline catalyst and a complex oxygen, sulfur or nitrogen heterocyclic compound.

Abstract: A silicone molding composition with improved thermal shock resistance having a plasticizing amount of a silicone resin comprising chemically combined RSiO.sub.3/2 units and R.sub.2 SiO units where the R to Si ratio may vary from 1.0 to 1.9 and the ratio of RSiO.sub.3/2 units to R.sub.2 SiO units may vary from 1:2.5 to 1:5.0 and containing less than 0.5 weight percent of silanol groups and preferably being substantially free of silanol groups where R is a monovalent hydrocarbon radical. There is also provided by the present invention a process for improving the thermal shock resistance of a silicone molding composition by having in said composition the aforesaid resin.

Abstract: Polysulfoneimides are provided and a method for making such materials. Aromatic bis(sulfoneanhydrides) are reacted with organic diamines to yield polymers which are useful in high temperature applications.

Abstract: .Iadd.A siloxane of the formula .Iadd. ##STR1## .Iaddend. WHICH CAN BE CURED BY MIXING WITH A CATALYST AND USED AS A SILOXANE RUBBER FOR A COATING, A SEALANT OR CAULK.