Patent · US Expired

Organopolysiloxanes having retarded skin formation

US4399267A · kind A · utility

8Cited by

2References

12Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Erhard Bosch
Ingo Craubner · Munich, DE
Norman Dorsch · Burghausen, DE
August Schiller · Neuötting, DE
Oswin Sommer · Burghausen, DE

Key dates

Filing date	Jul 26, 1982
Grant date	Aug 16, 1983
Priority date	—
Expiry date	Jul 26, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S528/901
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to organopolysiloxane compositions which are stable when stored under anhydrous conditions, but when exposed to moisture cure to an elastomer containing (a) a diorganopolysiloxane having terminal condensable groups, (b) a silicon compound having 3 amino groups bonded to silicon via nitrogen and/or oxime groups bonded to silicon via oxygen per molecule and (c) a silicon compound having at least one thiol group selected from mercapto-functional silanes or siloxanes. The presence of the mercapto-functional silanes or siloxanes substantially retards the formation of skin but does not substantially extend the cure time of the organopolysiloxanes compositions. These compositions are useful in, for example, screen printing, where a long skin-over time is desired.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.