Degussa Aktiengesellschaft

Other

Ewe-Hong Tan

Siegfried Wolff

Peter K Kleinschmit

Ulrich Deschler

Peter Panster

A method of preparing pure 3-butenyl triorgano oxysilanes, the intermediate products 3,4-dichlorobutyl triorgano oxysilanes and the use of the final products in rubber mixtures reinforced with silicic acid and vulcanizable with peroxides. 3,4-dichlorobutene-1 and trichlorosilane are used as initial products.

Method of preparing pure 3-butenyl triorganooxysilanes, the intermediate

The invention is directed to silylalkyl and silylaralkyl substituted cyclopentadienes which have a hydrolyzable group attached to the silicone atom, a process for their production and peroxide cross-linkable synthetic resin and rubber mixtures containing them.

Silyl substituted cyclopentadiene, process for its production and

The invention is directed to silyl alkyl and silylaralkyl substituted cyclopentadienes which have a hydrolyzable group attached to the silicon atom, a process for their production and peroxide cross-linkable synthetic resin and rubber mixtures containing them.

Mouldable and vulcanisable rubber mixtures are made containing a rubber (A) which still contains double bonds and which is cross-linkable by means of sulphur and a vulcanization accelerator or a mixture of rubber (A) with a different rubber (B), 0.2 to 10 parts of sulphur, 0.2 to 10 parts of a vulcanization accelerator and 1.0 to 10 parts of a bis-(alkoxysilylalkyl)polysulfide. There can also be present a silicate filler and/or a carbon black filler of rubber. The rubber mixtures have the silane, vulcanization accelerator and sulphur, calculated as S.sub.8 present in a molar ratio which causes the rubber mixture to have a reversion R=O (.+-.5%) resulting from the cross-linking isotherm at the vulcanization temperature where the reversion R is calculated according to Formula II ##EQU1## in which D.sub.max is the maximum vulcameter moment of rotation

Rubber mixtures giving reversion-free vulcanizates and process of

There is prepared a vulcanizable rubber mixture of a vulcanizable halogen free rubber or a mixture of a halogen free rubber with a maximum of 80% based on the weight of the total rubber of a halogen containing rubber, additionally a silicate filler in an amount of 1 to 250 parts by weight, an oxide of the metal zinc, magnesium or lead in an amount of 0 to 15 parts by weight, a monobasic fatty acid having 12 to 24 carbon atoms in the alkyl chain, benzoic acid or salicylic acid in an amount of 0 to 10 parts by weight, optionally sulphur and/or sulphur donor in an amount of 0.1 to 15 parts by weight, a vulcanization accelerator in an amount of 0.1 to 10 parts by weight, a plasticizer in an amount of 0 to 100 parts by weight, a stabilizer from the group of antiagers, fatigue inhibitors, antioxidants, light protective agents and ozone protective agents in an amount of 0 to 10 parts by weight of each, carbon black in an amount of 0 to 150 parts by weight, optionally additional customary rubber assistants in customary amounts and at least one organosilane in an amount of 0.1 to 20 parts by weight, the silane corresponding to the formula

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Wesseling, Germany

Ewe-Hong Tan