Impression compositions and process for preparing impressions

Details Impression compositions and process for preparing impressions Impression compositions and process for preparing impressions

1978-07-27

1980-09-16

Jacobs, Lewis T.

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

260 37SB, 264222, 264227, 433228, B29C 102

Patent

active

042229839

ABSTRACT:
Impression compositions containing (a) an organopolysiloxane having at least two alkenyl groups and containing at least 20 mol percent of monoorganosiloxane units, (b) an organopolysiloxane having at least 3 Si-bonded hydrogen atoms per molecule, (c) a catalyst which promotes the addition of Si-bonded hydrogen atoms to alkenyl groups and (d) 30 to 90 percent by weight of a filler, based on the total weight of the composition. Impressions are obtained by applying a composition containing components (a), (b), (c) and (d) to a surface of which an impression is to be made, crosslinking said composition and thereafter removing the formed structure from the contacted surface.

REFERENCES:
patent: 3082527 (1963-03-01), Nitzsche et al.
patent: 3631220 (1971-12-01), Wojdac
patent: 3844992 (1974-10-01), Antonen
patent: 3948848 (1976-04-01), Mink
patent: 3950300 (1976-04-01), Hittmair et al.
patent: 3996195 (1976-12-01), Sato et al.

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