Curable organopolysiloxane compositions
AssigneeToray Silicone Company, Ltd.
InventorToshio Suzuki
Life of this patent
Estimating the term…
Abstract
A room temperature-curable organopolysiloxane composition which bonds well to the substrate in contact with it during curing, without requiring a special adhesion promoter, comprises an organopolysiloxane having at least 2 hydroxy or hydrocarbonoxy groups bonded to silicon, optionally a silane of the formula (R.sup.2 O).sub.a SiR.sup.3.sub.4-a and from 0.01 to 20 weight percent parts silyl ester of phosphoric acid in which the --OH groups of phosphoric acid are replaced by --OSiR.sup.4.sub.3 groups or silyl ester of polyphosphoric acid in which the --OH groups of polyphosphoric acid are replaced by --OSiR.sup.4.sub.3 groups, where R.sup.4 is monovalent organic group.
Claims10
A curable organopolysiloxane composition comprising a composition of
- (i) 100 weight parts organopolysiloxane having at least 2 --OR.sup.1 groups bonded to silicon in each molecule where R.sup.1 is hydrogen atom or monovalent hydrocarbon group
- (ii) 0 to 50 weight parts silane with the formula
- (R.sup.2 O).sub.a SiR.sup.3.sub.4-a
- where R.sup.2 is alkyl, alkenyl or alkoxyalkyl group, R.sup.3 is monovalent organic group, a is from 2 to 4 inclusive, or its partial hydrolysis condensate, and
- (iii) 0.01 to 20 weight parts silyl ester of phosphoric acid in which the --OH groups of phosphoric acid are replaced by --OSiR.sup.4.sub.3 groups or silyl ester of polyphosphoric acid in which the --OH groups of polyphosphoric acid are replaced by --OSiR.sup.4.sub.3 groups, where R.sup.4 is monovalent organic group.
A curable organopolysiloxane composition comprising a composition of
- (i) 100 weight parts organopolysiloxane having at least 2 --OH groups bonded to silicon in each molecule,
- (ii) 1 to 50 weight parts silane with the formula
- (R.sup.2 O).sub.a SiR.sup.3.sub.4-a
- where R.sup.2 is alkyl, alkenyl or alkoxyalkyl group, R.sup.3 is monovalent organic group, a is from 2 to 4 inclusive, or its partial hydrolysis condensate, and
- (iii) 0.01 to 20 weight parts ester of phosphoric acid in which the --OH groups of phosphoric acid are replaced by --OSiR.sup.4.sub.3 groups or silyl ester of polyphosphoric acid in which the --OH groups of polyphosphoric acid are replaced by --OSiR.sup.4.sub.3 groups, where R.sup.4 is monovalent organic group.
A curable organopolysiloxane composition comprising a composition of
- (i) 100 weight parts organopolysiloxane having at least 2 hydrocarbonoxy groups bonded to silicone in each molecule,
- (ii) 0 to 5 weight parts silane with the formula
- (R.sup.2 O).sub.a SiR.sup.3.sub.4-a
- where R.sup.2 is alkyl, alkenyl or alkoxyalkyl group, R.sup.3 is monovalent organic group, a is from 2 to 4 inclusive, or its partial hydrolysis condensate, and
- (iii) 0.01 to 20 weight parts silyl ester of phosphoric acid in which the --OH groups of phosphoric acid are replaced by --OSiR.sup.4.sub.3 groups or silyl ester of polyphosphoric acid in which the --OH groups of polyphosphoric acid are replaced by --OSiR.sup.4.sub.3 groups, where R.sup.4 is monovalent organic group.
Dependencies are inferred from the claim text.