Making silicone rubber molds from reclaimed cured silicone rubbe

Details Making silicone rubber molds from reclaimed cured silicone rubbe Making silicone rubber molds from reclaimed cured silicone rubbe

1975-03-26

1977-02-01

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Orienting or aligning solid particles in fluent matrix material

264225, 264DIG69, B29C 102

Patent

active

040062074

ABSTRACT:
The cost of a silicone rubber mould is reduced by making it partly from uncured, liquid, castable, silicone rubber and partly from compatible, reclaimed silicone rubber particles. The latter are treated, e.g., with a swelling agent, to decrease their specific gravity below that of the liquid, silicone rubber. When the two rubbers are amalgamated in a mould having an exposed surface of a master to be reproduced, the particles float away from the surface of the master leaving the liquid, silicone rubber, which is permitted to cure, in contact therewith. After curing the resultant silicone rubber mould is stripped from the master.

REFERENCES:
patent: 2853742 (1958-09-01), Dasher
patent: 3093443 (1963-06-01), Levinson
patent: 3230284 (1966-01-01), Iverson
patent: 3527856 (1970-09-01), Olstowski
patent: 3539144 (1970-11-01), Krug
patent: 3882215 (1975-05-01), Dyke et al.

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