Room-temperature vulcanizate

Room temperature precipitation heat treatment aluminum alloys, 2 332-333 Room-temperature vulcanizable silicone rubber, 25 129... 

Silicone rubber has both excellent low temperature and high temperature properties. It can withstand temperatures up to 315°C and workable at -65°C. Poor performance with low tear strength and abrasion resistance limit their use in most applications. Liquid silicone compounds LTV which are room temperature vulcanizable are useful for small repairs and sealing application and have been used for poured-in-place gaskets. 

Figure 4.18 A polysiloxane Room-Temperature Vulcanizate (RTV) being used to make a mold of an intricately carved surface. The photograph was generously provided by the Dow Coming Corporation of Midland, MI.

The reaction is also utilized for cross-linking between vinyl-substituted siloxanes and oligomeric hydrosilanes in the production of room-temperature vulcanizable sihcone rubber. Reaction can be carried out without solvents, but common solvents such as benzene, toluene, dichloromethane, THF, and acetonitrile can be employed as well. A wide variety of 1-alkenes are hydrosilated regiospecifically to give... 

JAP(K)69131)compositions, room temperature-vulcanizable organopoly-siloxane compositions (85USP4517337), potting compositions... 

Room Temperature Vulcanizable Single Component Silicone Rubbers... 

With room temperature vulcanizable two-component silicone rubbers, the polymer and the crosslinking component are mixed immediately before application. Two different crosslinking systems are used, one based on polycondensation and the other on polymer addition. 

W. Hechtl, Chemistry and Technology of Room-Temperature-Vulcanizable Silicone Rubber", in Silicones — Chemistry and Technology, (Eds. G. Koemer, M. Schulze, J. Weis), Vulkan Verlag, Essen, 1991, p. 45. 

Cold grades, that is, one-component room temperature vulcanizable elastomer grades (RTVs) dominate in the case of liquid silicone rubbers. In these cases, the rubbers are branched poly(dimethyl siloxanes) with silanol end groups that can be cross-linked with tetrabutyl titanate or methyl triacetoxy silane. The cross-linking starts on contact with the humidity in the air, whereby in the case of methyl triacetoxy silane, for example, acetic acid is liberated and the methyl trihydroxysilane produced reacts with the silanol groups of the polymer ... 

Room Temperature Vulcanizable (RTV) Silicones. One-component, moisture-curable, room-temperature vulcanizable (RTV) silicones represent one of the largest-volume and commercially most successful silicone technologies. When exposed to atmospheric moisture, RTV silicones undergo hydrolysis and... 

Room-temperature vulcanizable (RTV) Silicones Form-in-place seals, coatings, prototype parts -120 to 450 Many types differing mainly in hardness and mechanical properties... 

The condensation of silanols is also catalyzed by metal compounds such as cobalt naphthenate and stannous octoate. Such compounds are used in connection with room-temperature vulcanizable elastomers (Section 15.6.2.6) and resins (Section 15.6.3). Their mode of action does not appear to have been investigated in any detail. 

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