The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1990
Filed:
Apr. 12, 1989
Peter Schwabe, Leverkusen, DE;
Ottfried Schlak, Leverkusen, DE;
Gottfried Knispel, Leverkusen, DE;
Reiner Voigt, Leverkusen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
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.