Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1981-03-25
1982-12-07
Warren, Charles F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
528374, 523109, 523200, B01J 3102, B01J 3126
Patent
active
043626491
ABSTRACT:
An elastomeric dental impression catalyst composition for mouth temperature curing of liquid polythiopolymercaptan polymers comprised of propionic acid-treated, submicron zinc oxide and purified benzothiazyl disulfide (2,2.sup.1 -dithiobis-(benzothiazole)) is disclosed. The composition contains at least 20 parts by weight of the propionic acid-treated, submicron zinc oxide and less than 20 parts by weight of substantially pure benzothiazyl disulfide, with the amount of each of the zinc oxide and the benzothiazyl disulfide being based upon 100 parts by weight of the polymer. The final cured composition is also disclosed.
REFERENCES:
patent: 3362927 (1968-01-01), Lochridge
patent: 3637612 (1972-01-01), Bertozzi
patent: 3923754 (1975-12-01), Pellico
patent: 4082693 (1978-04-01), Kessler et al.
Covington Raymond
Marjama Owen D.
Roessel Theodore B.
Sybron Corporation
Warren Charles F.
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