High modulus silicone rubber

Details High modulus silicone rubber High modulus silicone rubber

1976-05-19

1977-10-04

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08L 8304

Patent

active

040523578

ABSTRACT:
A silicone rubber composition prepared from a mixture of 100 parts by weight polydiorganosiloxane gum, 25 to 75 parts by weight of a reinforcing silica filler, 5 to 20 parts by weight of a hydroxylated diorganosilicon compound having about two hydroxyl radicals per molecule and the organic radicals are 10 to 50 percent phenyl, 2 to 20 percent vinyl and the remainder methyl, fiberized blast furnace slag fibers in amounts of 20 to 80 parts by weight and 0 to 10 parts by weight of alkoxy silicon compound having at least 25 weight percent alkoxy radical provides a silicone rubber when cured which has a high modulus, improved tear strength and can be made oil resistant by adding magnesium oxide to the composition. This silicone rubber can be used for seals, gaskets and particularly where magnesium oxide is present the use can be in contact with oils.

REFERENCES:
patent: 3839266 (1974-10-01), Bargain
patent: 3867158 (1975-02-01), Hopkins
patent: 3919161 (1975-11-01), Glaister et al.

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