Abstract: Acetylenic maleates, fumarates and related derivative compounds are new compositions of matter having the formula:R.sub.1 O.sub.2 C--CH.dbd.CH--CO.sub.2 R.sub.2wherein R.sub.1 may be an organic moiety containing at least two carbon atoms triply bonded one to the other as:--C.tbd.C--and R.sub.2 may be hydrogen, an organic moiety, or R.sub.1 ; suitable for use as liquid injection molding inhibitors either singly or in combination with themselves or other liquid injection molding inhibitors when used for the process of liquid injection molding curable compositions enabling an increase in the size of articles manufactured therefrom, which new compositions of matter cure into the polymerizable or curable resins thereby creating new compositions of matter as cured resins from which said articles of manufacture are produced.

Abstract: The present invention relates to a method for making nitrosamine-free silicone articles by treating vinyl-containing organopolysiloxanes with an effective amount of an acid.

Abstract: Novel fluorosilicone hydrides are provided which are useful as intermediates in the preparation of epoxy-functional fluorosilicones having improved cure efficiency at low temperatures and improved resistance to solvents and fuels than analogous non-fluoro-functional epoxy-functional silicones prepared from non-fluoro-functional silicone hydrides.

Abstract: The present invention provides an improved heat curable silicone composition, having increased tear strength, oil resistance, and reduced compression set, comprising (A) a blend containing (1) a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend having a viscosity of about 5,000 to about 500,000 centipoise at 25.degree. C., and (2) a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend having a viscosity of about 8,000,000 to about 100,000,000 centipoise at 25.degree. C; (B) an organopolysiloxane resin copolymer; (C) an organic peroxide catalyst; (D) a filler; and (E) an organohydrogenpolysiloxane.

Abstract: There is provided an organopolysiloxane composition having low compression set as well as fuel and oil resistance in addition to high strength, good elongation, and tear comprising:(A) 100 parts of a first component comprising:(1) a vinyl-containing liquid organopolysiloxane or a blend of vinyl-containing liquid polysiloxanes;(2) optionally, filler; and(3) a catalyst; and(B) from 1 to 100 parts, based on 100 parts of (A), of a hydrogen silicone composition selected from the class consisting of hydrogen containing silanes and hydrogen containing polysiloxanes and mixtures of hydrogen containing polysiloxanes with fillers and high viscosity polysiloxanes;(C) optionally, magnesium oxide to impart oil resistance;(D) optionally, an MQ resin to impart fuel resistance; and(E) optionally, a cerium containing compound or, alternatively, tetramethyldivinyldisilazane to impart low compression set.

Abstract: An addition curing silicone composition with a low viscosity in the uncured state and high physical strength in the cured state comprising a vinyl-containing diorganopolysiloxane polymer, a platinum catalyst, a hydride cross-linking agent and a linear hydride coupler in which the viscosity of the linear hydride coupler varies from 1 to 1,000 centipoise at 25.degree. C.

Abstract: An organosiloxane gel is made by reacting (1) an organosiloxane having a viscosity of from 10 to 10,000 centistokes at 25.degree. C. and being a copolymer consisting essentially of units of the formula R.sub.2 ViSiO.sub.0.5, RViSiO, R.sub.2 SiO and MeR.sub.2 SiO.sub.0.5, where each R is individually selected from the group consisting of methyl and phenyl radicals, Vi represents a vinyl radical and Me represents a methyl radical, at least 0.50 molar percent of the units in said copolymer being R.sub.2 ViSiO.sub.0.5 units and RViSiO units where the terminal groups are at least 50 mole percent of R.sub.2 ViSiO.sub.0.5 units and may have as the rest of the total terminal units MeR.sub.2 SiO.sub.0.5 units, (2) a liquid hydrogen siloxane of the average general formula XRMeSIO(R.sub. 2 SiO).sub.n (RHSiO).sub.

Abstract: A solvent resistant silicone rubber room temperature vulcanizable silicone rubber composition is provided for by having a blend to a vinyl-containing polymer and a vinyl-containing silicone resin and as a cross-linking agent a hydride-containing resin or a hydrogen containing polysiloxane. The composition has therein, also, a platinum catalyst. There may also be present in the composition a filler which may be an extending filler or a reinforcing filler, treated or untreated as may be desired.

Abstract: A solvent resistant room temperature vulcanizable silicone rubber composition comprising a blend of vinyl-terminated polysiloxanes having from 2 to 98 mole percent of alkylperfluoroalkylalkylene siloxy units in the polymer chain, a hydride cross-linking agent selected from the class consisting of hydride-containing resins composed of mono-functional units and tetrafunctional units and hydride-containing polysiloxanes or a mixture of the above cross-linking agents which composition is cured in the presence of a platinum catalyst.The above composition cures to an elastomer at room temperature or elevated temperatures. Preferably, there is incorporated into the composition a treated filler which gives the cured elastomer physical strength properties.

Abstract: There is provided a new improved dampening medium for a shock dampening device. The dampening device comprises a closed chamber, a movable piston rod extending through the chamber and an enlarged piston head located on the piston rod. Located in the interior space of the closed chamber under pressure is a compressible solid, fragmented, particulate mass of cured unfilled silicone rubber composition for producing a damping effect on the piston rod and head. The damper device includes a threaded plug for varying the internal static pressure on the compressible mass within the chamber and apertures extending through the piston head or an annular space between the outer edge of the piston head and the interior of the chamber for bypassing the compressible mass.

Abstract: There is provided an organopolysiloxane composition combining high strength with exceptionally good elongation, which composition comprises a first component, a mixture of two vinyl-containing polysiloxanes or blends of vinyl-containing polysiloxanes, one of which is a high viscosity polysiloxane or a blend of high viscosity polysiloxanes, the other is a low viscosity polysiloxane or a blend of low viscosity vinyl-containing polysiloxanes, a filler and an effective amount of a platinum catalyst.The second component comprises a hydrogen-containing silane or polysiloxane. When it is desired to cure the composition into an elastomer the first component is mixed with the second component, that is, the hydrogen containing silane or polysiloxane and the mixture is allowed to cure either at room temperature or at elevated temperatures. Part of the total high viscosity vinyl-containing polymer can be mixed with the second component.