Process for producing a formed silicone foam by injection moldin

Details Process for producing a formed silicone foam by injection moldin Process for producing a formed silicone foam by injection moldin

1993-10-25

1995-10-17

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264 453, 264 53, 2643286, 521 91, 521110, 521122, 521154, B29B 700

Patent

active

054591678

ABSTRACT:
To manufacture high quality, fine pored silicone foam parts by the injection molding process, two reaction components A and B are used. They both contain a silicone polymer and fumed silica. The component A also contains a complexed organo-platinum catalyst and a small portion of water, whereas the other component B contains as a crosslinker polydimethyl hydrogen siloxane.
At least one of the two components A and B of the mixture is pressurized with a gas, preferably air or nitrogen, in a pressure container so that the gas is dissolved into the component(s). The components A and B are mixed in the pressure process, injected into an injection mold, and heated so that the foaming process forms the silicone foam part.

REFERENCES:
patent: 4888217 (1989-12-01), Jones
patent: 5356940 (1994-10-01), Giesen

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