Abstract: A composition curable to a silicone elastomer is prepared by mixing a triorganosiloxy endblocked polydimethylsiloxane fluid where the triorganosiloxy is dimethylvinylsiloxy or methylphenylvinylsiloxy, a reinforcing silica having a surface treated organosiloxane groups which contain 0.05 to 0.32 percent by weight vinyl, a fluid organohydrogensiloxane, a platinum catalyst and optionally a platinum catalyst inhibitor. The polydimethylsiloxane fluid has a major peak molecular weight of 68,000 to 135,000, a dispersity index greater than 3.8, the lowest molecular weight species between 854 and 3146 and the highest molecular weight species between 174,000 and 370,000. These compositions are readily extrudable under low pressure and cure to high strength elastomers with a high durometer.

Abstract: Vinyl and allyl containing bis(polydimethylsiloxanyl)amine compounds are useful as a treating agent for pinely divided silica when used in conjunction with conventional silazanes. The in situ filler treatment using the amine compounds and silazanes allows the production of easily extrudable compositions which cure to silicone elastomers with unique property profiles.

Abstract: An improved treatment for reinforcing silica uses both a silazane represented by the formula (RR'R"Si).sub.2 NH and bis-Si-(1-methyl-1-silacyclopentenyl) amine as filler treatment. The filler treatment may be done either in situ during the manufacture of curable silicone elastomer compositions or as a separate operation. The treatment allows production of an easily extrudable composition with improved durometer and tear strength.

Abstract: Organosilicon compositions comprising at least one silicon-bonded alkenyloxy radical, such as vinyldimethylcarbonoxy, are disclosed. These unsaturated organosilicon compositions are useful as partial or complete replacements for the analogous organosilicon compositions bearing the well-known silicon-bonded vinyl radical. In particular, vinyldimethylcarbinoxy-endblocked polydimethylsiloxane is useful as a component in an elastomeric composition which is cured with an organosilicon hydride.

Abstract: Mixing mercaptoorganopolysiloxanes, organic hydroperoxide, a nitrogen compound, such as cyclohexylamine, piperidine or triethylamine and optionally a filler provides a composition which cures to an elastomer at room temperature. The elastomers have tack free surfaces and are useful as sealants and rubber articles.

Abstract: Mixing mercaptoorganopolysiloxanes, organic peroxide and optionally a filler provides a composition which cures to an elastomer either at room temperature or by heating. The elastomers have tack free surfaces and are useful as sealants and rubber articles.

Abstract: Mixing a polydimethylsiloxane having terminal vinyl groups or silacyclopentenyl groups, a mercaptoorganopolysiloxane and an organic peroxide provides a composition which cures to an elastomer at room temperature or by heating. The elastomers are useful as sealants and rubber articles.

Abstract: Mixing a polydimethylsiloxane having from 15 to 30 mol percent methylvinylsiloxane units, a mercaptoorganopolysiloxane, an organic peroxide and optionally a filler provides a composition which cures to an elastomer at room temperature or by heating. The elastomers are useful as sealants and rubber articles.

Abstract: Mixing a low molecular weight polydimethylsiloxane either linear or cyclic, a mercaptoorganopolysiloxane, an organic peroxide and optionally a filler provides a composition which cures to an elastomer at room temperature or by heating. The elastomers are useful as sealants and rubber articles.

Abstract: Organopolysiloxane compositions suitable for use in a liquid injection molding process of elastomeric articles are produced by mixing a vinyl-endblocked polydiorganosiloxane fluid copolymer containing dimethylsiloxane units and methyl-3,3,3-trifluoropropylsiloxane units, a treated, reinforcing silica filler, a platinum-containing catalyst, a curing agent comprising dimethylhydrogensiloxane units as the only source of silicon-bonded hydrogen atoms and, as an inhibitor for the platinum-containing catalyst, certain olefinic siloxanes and/or acetylenic siloxanes. These compositions are especially suited for liquid injection molding because they can be stored at room temperature for days and can be injected into a hot mold with pressures less than 352 kg./sq.cm. (5,000 psi) whereon they cure rapidly to an elastomeric article having a tensile strength greater than 42 kg./sq.cm., and elongation at break greater than 300 percent and a tear strength greater than 7 kg./cm.

Abstract: Siloxane foams which are activated and cured by heating can be prepared by mixing an organohydrogensiloxane, a hydroxylated organosiloxane and a rhodium catalyst in amounts such that the ratio of silicon-bonded hydrogen atoms to silicon-bonded hydroxyl radicals is from 2.5 to 40 and thereafter heating the mixture above 90.degree. C. The rhodium catalyst provided a pot life of at least 8 hours when used in amounts of 0.0025 grams per 100 grams of hydroxylated organosiloxane. The siloxane foams can be made to have an increased fire retardant property by adding 0.01 to 2 parts by weight carbon black based on the weight of the total composition. Siloxane foams are also prepared from mixing an organohydrogensiloxane, a hydroxylated organosiloxane, a vinyl containing triorganosiloxy endblocked polydiorganosiloxane and a rhodium catalyst. These foams can be used for cushioning, in acoustical applications and protective filling or coating applications and especially applications wherein fire retarding is important.

Abstract: Mixing a fluorinated surfactant with a silicone foam composition decreases the density of the cured foam. Increasing the amount of fluorinated surfactant decreases the foam density. Silicone compositions comprising a hydroxylated organosiloxane, an organohydrogensiloxane, a platinum catalyst and a fluorinated surfactant cure to foams with lower densities than the same compositions without the fluorinated surfactant. The cured foams can be used in the same applications as other silicone foams.

Abstract: Siloxane foams can be prepared by mixing an organohydrogensiloxane, a hydroxylated organosiloxane and a platinum catalyst in amounts such that the ratio of silicon-bonded hydrogen atoms to silicon-bonded hydroxyl radicals is from 2.5 to 7 and thereafter allowing the mixture to foam. The amount of open-cell structure in the foam can be increased by having present in the mixture an organomonohydrogensiloxane such that the molar ratio of silicon-bonded hydrogen atoms from the organohydrogensiloxane to silicon-bonded hydrogen atoms from the organomonohydrogensiloxane is from 0.4 to 2. The siloxane foams can be made to have an increased fire retardant property by adding 0.01 to 2 parts by weight carbon black based on the weight of the total composition. Siloxane foams are also prepared from mixing an organohydrogensiloxane, an organomonohydrogensiloxane, a hydroxylated organosiloxane, a vinyl containing triorganosiloxy endblocked polydiorganosiloxane and a platinum catalyst.

Abstract: Polydiorganosiloxane gum base stocks which contain per 100 parts by weight of the stock, 15 to 60 parts by weight of an organosiloxane having an average of at least 2 silicon-bonded hydroxyl radicals per molecule, 3 to 25 parts by weight of an organosiloxane having an average of at least 2.5 silicon-bonded hydrogen atoms per molecule, 0.05 to 0.5 parts by weight acetylenic alcohol inhibitor and 1 to 200 p.p.m. platinum as a platinum catalyst, can be sponged by heating the composition above 125.degree. C. The sponged products are elastomeric, have flame retardant properties and can be used where applications see relatively high temperatures.

Abstract: Organosiloxane compositions which contain at least five weight percent of organic radicals selected from aryl radicals, chlorinated aliphatic hydrocarbon radicals, fluorinated aliphatic hydrocarbon radicals, hydrocarbon radicals having carbon-bonded mercapto groups, hydrocarbon radicals having carbinol groups and aliphatic hydrocarbon ether radicals and comprise an organosiloxane polymer and a heat accelerated curing mechanism can be cured into useful products such as elastomers and resins by exposing these compositions to a microwave source having frequencies of from 900 to 5,000 mega Hertz until the composition cures.

Abstract: Olefinic siloxanes which are inhibitors for platinum catalyst can be made by the reaction of secondary or tertiary acetylenic alcohols with siloxanes having silicon-bonded-hydrogen atoms. These olefinic siloxanes inhibit the platinum catalyst such that it will not catalyze the addition of SiH to aliphatic unsaturation at room temperature and does not inhibit the reaction at elevated temperatures. These olefinic siloxanes contain from 3 to 10 siloxane units with a total of at least three units from at least one RHSiO and/or R.sub.2 HSiO.sub.0..sub.5, at least one ##EQU1## and the remaining siloxane units being ##EQU2##R.sub.3 SiO.sub.0..sub.5, SiO.sub.2 or RSiO.sub.1..sub.5but no more than three units of any one of these siloxane units.

Abstract: Mixing a hydroxyl endblocked polydiorganosiloxane, an organohydrogensiloxane, a platinum catalyst and a platinum catalyst inhibitor where the inhibitor is present in an amount of 0.0001 to 0.001 moles of inhibitor per 100 grams of hydroxyl endblocked polydiorganosiloxane and thereafter allowing the resulting mixture to cure, provides an elastomer.

Abstract: Injecting a mixture of an acetylenic alcohol and a siloxane compound having at least three silicon-bonded hydrogen atoms into a gas liquid chromatographic (GLC) column through an injection port heated at 300.degree.C. to 375.degree.C. and coated with a layer of a platinum catalyst where the column is heated at 100.degree.C. to 375.degree.C. provides an olefinic siloxane compound which is, below 100.degree.C., an inhibitor for the reaction between the acetylenic alcohol and the siloxane compound having at least three silicon-bonded hydrogen atoms in the presence of a platinum catalyst. This method provides high purity products which do not need further distillation and which do not contain platinum.BACKGROUND OF THE INVENTION1. Field of the InventionThis invention relates to a method of preparing a siloxane compound having olefinic unsaturation by using a GLC column.2. Description of the Prior ArtThe reaction between compounds having aliphatically unsaturated carbon linkages such as C=C or C.tbd.

Abstract: A vaporized mixture of a platinum catalyst in the amount of 0.01 to 2 p.p.m. platinum, an acetylenic alcohol and a siloxane compound having at least three silicon-bonded hydrogen atoms per molecule is passed through a tube such as a stainless steel tube heated at 210.degree.C. to 450.degree.C. to produce an olefinic siloxane compound which is, below 100.degree.C., an inhibitor for the reaction between the acetylenic alcohol and the siloxane compound having at least three silicon-bonded hydrogen atoms in the presence of platinum.

Abstract: Continuously passing a mixture of an acetylenic alcohol and a siloxane compound having at least three silicon-bonded hydrogen atoms bonded to at least three different silicon atoms in the presence of a platinum catalyst through a heating means wherein the mixture is heated above 100.degree.C. and above the temperature at which the olefinic siloxane compound product is no longer an inhibitor for the reaction and wherein the reactants and products are maintained under sufficient pressure to keep the mixture in a liquid state at least until the mixture has passed through the heating means provides an olefinic siloxane compound which, below 100.degree.C, is an inhibitor for the reaction between the acetylenic alcohol, the siloxane compound having at least three silicon-bonded hydrogen atoms in the presence of platinum.