Method of forming a foamed gasket

Details Method of forming a foamed gasket Method of forming a foamed gasket

1990-09-05

1992-08-18

Lusignan, Michael

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

521122, 525478, B29C 6700

Patent

active

051397153

ABSTRACT:
A method of forming a foamed gasket comprising the steps of separately introducing a composition of expandable polysiloxanes consisting of two liquids of a main agent and a curing agent into a mixing chamber having a special rotor secured in the inside thereof, mixing the two liquids in the mixing chamber by rotating the rotor, discharging the obtained mixture on the sealing part of an article to be coated such as waterproof case of a car and foaming and curing the mixture to form a foamed gasket.
The present invention is excellent in workability and may be applied to the on-line system, and the obtained foamed gasket is excellent in sealability.

REFERENCES:
patent: 3524825 (1970-08-01), Rill, Jr.
patent: 3923705 (1975-12-01), Smith
patent: 4801622 (1989-01-01), Inoue et al.
patent: 4892691 (1990-01-01), Kolossow
patent: 4960847 (1990-11-01), Arai et al.
patent: 4972001 (1990-11-01), Kimura et al.
"Textbook of Polymer Science", F. Billmeyer, Interscience Pub., New York (1962) pp. 495-496.

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