Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1995-10-04
1997-11-18
Dean, Karen A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523213, 524863, 524847, C08K 902
Patent
active
056888406
ABSTRACT:
A process for preparing a room temperature-curable organopolysiloxane composition comprising (A) (A-1) a specific organopolysiloxane or a mixture of (A-1) and (A-2) a specific silicone compound or a partial hydrolysis product thereof, (B) silica powder having a specific surface area of 20 to 800 m.sup.2 /g, (C) a curing catalyst, and (D) a silane coupling agent or an organopolysiloxane having a specific substituent, which comprises adding component (D) to component (A) prior to kneading or at the time of kneading components (A) and (B). The composition exhibits excellent physical characteristics, excellent workability in terms of flowability, adhesion, and extrudability, undergoes no change in viscosity with time and, in particular, suffers no impairment of these characteristics when stored for a long period of time.
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patent: 5061739 (1991-10-01), Shimizu
patent: 5087684 (1992-02-01), Perrin
patent: 5508360 (1996-04-01), Cifuentes et al.
Dean Karen A.
Toshiba Silicone Co. Ltd.
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