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US 5,969,075 AGranted
Process for the production of room temperature curable organopolysiloxane compositions
AssigneesShin-Etsu Silicones of America, Shin-Etsu Chemical Co., Ltd.
InventorYoshifumi Inoue
Life of this patent
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Abstract
A room temperature curable organopolysiloxane composition comprising (A) an organopolysiloxane having at least two hydroxyl groups, (B) finely divided silica, (C) an amino-bearing silane, (D) an organic silicon compound, and (E) a curing catalyst is prepared by mixing components (A) and (B) with component (C) and thereafter, mixing components (D) and (E).
Claims3
A process for preparing a room temperature curable organopolysiloxane composition comprising as main components,
- (A) an organopolysiloxane bearing at least two hydroxyl groups each attached to a silicon atom in a molecule and having a viscosity of 100 to 500,000 centistokes at 25.degree. C.,
- (B) finely divided silica,
- (C) an amino-bearing silane and/or a partial hydrolyzate condensate thereof,
- (D) an organic silicon compound of the following formula:
- R.sub.a SiX.sub.4-a
- wherein R is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 10 carbon atoms, X is a ketoxime, alkoxy or 1-methylvinyloxy group, and letter a is equal to 0 , 1 or 2, and/or a partial hydrolyzate condensate thereof, and
- (E) a curing catalyst,
- said method comprising the steps of mixing components (A) and (B) with component (C) and thereafter, mixing components (D) and (E) therewith.
5 more elements
Dependencies are inferred from the claim text.