Dimensionally stable impression compositions

Details Dimensionally stable impression compositions Dimensionally stable impression compositions

1989-04-12

1990-10-23

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523120, 524862, 528 31, 264 19, A61K 610

Patent

active

049652958

ABSTRACT:
In a silicone impression and duplicating composition which undergoes crosslinking at ambient temperature by an addition reaction, comprising
(a) an organopolysiloxane possessing two or more vinyl groups in the molecule,
(b) optionally an organopolysiloxane without reactive groups,
(c) an organopolysiloxane possessing two or more Si-H groups in the molecule,
(d) a catalyst,
(e) a filler and,
(f) optionally an auxiliary and/or colorant, the improvement wherein polysiloxane components (a)-(c) contain not more than about 1.5% by weight of volatile oligomers, whereby the dimensional stability of impressions is improved.

REFERENCES:
patent: 2709161 (1955-05-01), Kilbourne, Jr. et al.
patent: 4035453 (1977-07-01), Hittmair et al.
patent: 4222983 (1980-09-01), August et al.
patent: 4273902 (1981-06-01), Tomioka et al.
patent: 4356116 (1982-10-01), Beers
patent: 4356116 (1982-10-01), Beers
patent: 4430461 (1984-02-01), Deering et al.

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