Degussa Aktiengesellschaft

Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Other

Degussa Gmbh

Federal Republic of Germany

Degussa Akiengesellscahft

Siegfried Wolff

Peter K Kleinschmit

Werner Schwarze

Ulrich Deschler

Udo Goerl

Ewe-Hong Tan

Lothar Rothbuhr

Karl Meier

Udo Gorl

Heinz Grewatta

Rudolf Schwarz

Gerhard Kuhner

Friedrich Thurn

Horst Lambertz

Christa Liedtke

Peter Panster

Dieter Kerner

Rudolf Michel

Wolfgang Buder

Hans Remmel

Alan Parkhouse

Johannes Pochert

Kurt Burmester

Georg Hellwig

Ewe H Tan

Hidenari Nakahama

Reinhard Stober

Gunter Turk

Hans Deusser

Alfons Kreher

Marinus Haddeman

Paul Golombeck

Rainer Panenka

Christoph Klatte

Erhard Klotzer

A rubber composition is disclosed containing an ethylene-propylene-nonconjugated diene copolymer rubber (or a blend of an ethylene-propylene-nonconjugated diene copolymer rubber and a diene rubber), a specific alkoxysilane compound, and amorphous silica powder having a specific surface area of 50 to 100 m /g (BET adsorption). The vulcanized rubber is prepared by vulcanizing such a rubber composition. The rubber composition is excellent in dynamic characteristics and also in mechanical characteristics, dynamic fatigue resistance and thermal aging resistance. It also can provide a vulcanized rubber having the above-mentioned effects.

Vulcanizable EPDM containing rubber composition

The invention relates to mixtures including resorcinol and silica which are used as adhesion promoters for improving the adhesion between textile or metal strength carriers and rubber or plastics. The mixtures in accordance with the invention exhibit a sharply limited sublimation behavior with regard to the resorcin.

Adhesion promoters for rubber and synthetic mixtures

A process for the production of plastic and rubber compositions filled with carbon black in which an organosilicon compound is used and is reacted in situ with the carbon black. The organosilicon compound is selected from the following formulae:

Process for the production of plastic and rubber compositions filled

Moulding materials vulcanizable by means of the action of heat which contain a thiocyanatopropyltrialkoxysilane and a method of their manufacture are disclosed.

Peroxide vulcanizable moulding materials and a method of their

Moulding materials are disclosed which are vulcanizable by means of the development of heat, and are provided with aluminum- and/or magnesium hydroxide in a flame-resistant manner and contain a thiocyantopropyltrialkoxy silane.

Heat vulcanizable moulding materials

Bis(2,4-organylthio-s-triazine-6-yl) polysulfides of the general Formula (I) ##STR1## prepared from compounds of the general formula (II) ##STR2## and from an ammonium or alkali polysulfide and the use of such compounds as accelerators in vulcanizable rubber mixtures.

Vulcanizable rubber mixtures containing

A granular material containing zinc oxide and precipitated silica which is readily dispersible in rubber mixtures.

Method of producing granulated material composed of zinc oxide and

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

Carbon black is reacted with at least one organosilicon compound of the General Formula

Carbon blacks modified with organosilicon compounds, method of their

A method of granulating resorcinol/silica mixtures which comprises transporting a mixture of resorcinol and precipitated silica by conveyor worms to two pressing rollers whose shafts are attached vertically above one another and whose contact pressure can be varied, compacting said mixture between said rollers, breaking up the compacted mixture with a cake breaker to obtain a granulate with minimum grain size and separating the remaining dusty portion of said mixture. The mixtures can be added to vulcanizable rubber to provide improved adhesion to rubber reinforcements.

Method of granulating resorcinol/silica mixtures, the granulates

A two-stage method for the surface modification of natural or synthetic, oxide or silicate fillers using organosilicon compounds of the formulas:

Method for the production of fillers modified with organosilicon

There is described the use of substituted N-trichloromethyl thiodicarboximides in combination with N,N'-substituted bis-(2,4-diamino-s-triazin-6-yl)-oligosulfides in vulcanizable rubber mixtures in order to improve the vulcanization characteristics and such rubber mixtures.

Substituted N-trichloromethyl thiodicarboximides and N,N-substituted

The invention relates to N,N'- and N,N',N'-substituted silyl ureas of the general formula ##STR1## and to their use as antidegradation agents which can not be washed out in polymers, especially rubber.

Use of N,N'- and N,N',N'-substituted silyl ureas as antidegradation

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Bornheim-Merten, Germany

Siegfried Wolff