Wacker-chemie Gmbh

Manfred Heisler

Willi Kleine

Fridolin Stary

Ingo Haller

Ernst Spindler

Alois Schlierf

Frank Achenbach

Johann Schuster

Armin Fehn

Christof W&ouml;rner

Rudolf Ratka

A process for preparing organopolysiloxane compositions (A) having a viscosity measured at 25&#xb0; C. of at least 500 Pa&#xb7;s., wherein organopolysiloxanes (O) and fillers (F) are mixed and kneaded in a first process stage in a kneading cascade having at least two kneading chambers arranged in series adjacent one another, each containing kneading tools having parallel axes and capable of being driven in co-rotating or counter-rotating directions, the chambers connected to one another by means of openings through which material can pass in a direction transverse to the axes of the kneading tools, with the first kneading chamber having a feed opening and the last kneading chamber having a discharge opening, to give raw mixtures, and the raw mixtures are kneaded and degassed in a reciprocating kneader in a second process stage.

Process for the continuous preparation of high-viscosity silicone compositions

In a continuous process for producing filler-containing silicone compositions (P), a silicone composition (E) comprising filler (F1) is mixed with filler (F2).

Process for the continuous production of highly viscous filler-containing silicone compositions

Process for the continuous preparation of HTV silicone compositions

A matting agent for plastic compositions comprising either a high molecular weight, gel-containing vinyl chloride polymer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.2 cm.sup.3 /g, a maximum plasticizer absorption of 15%, a particle size parameter d' of 10 to 80 .mu.m and a coefficient of uniformity n greater than 3, or a high molecular weight, gel containing copolymer of vinyl chloride and 1 to 40% by weight of comonomer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.10 cm.sup.3 /g, a maximum plasticizer absorption of 10%, a particle size parameter d' of 10 to 80 .mu.m and a coefficient of uniformity n greater than 3, plastic articles containing said matting agent and a method of imparting a matt to the surface of plastic articles.

Novel matting agent and its use

Growing community of inventors

Emmerting, Germany

Manfred Heisler