CURABLE COMPOSITION
First Claim
1. A non-organotin curable compositionwhich comprises:
- (A) an organic polymer containing a silyl group capable of crosslinking under siloxane bond formation, said silyl group being a group represented by the general formula (1);
—
SiR1X2
(1)(wherein R1 represents a group selected from among alkyl groups containing 1 to 20 carbon atoms, aryl groups containing 6 to 20 carbon atoms, aralkyl groups containing 7 to 20 carbon atoms and triorganosiloxy groups represented by (R′
)3SiO—
in which R′
is a hydrocarbon group containing 1 to 20 carbon atoms, the three R′
groups may be the same or different, and X represents a hydroxyl group or a hydrolyzable group and the two X groups may be the same or different);
(B) an amidine compound (B-1) as a silanol condensation catalyst; and
(C) a carboxylic acid,wherein the ratio between the number of moles (b) of all nitrogen atoms in the (B-1) component of the composition and the number of moles (c) of all carboxyl groups in the (C) component of the composition, namely the ratio (b)/(c), is higher than 2.
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Accused Products
Abstract
The present invention has its object to provide a curable composition which comprises an amidine compound as a non-organotin catalyst and shows good elongation, flexibility, surface curability, depth curability and adhesiveness; the above object can be achieved by a non-organotin curable composition which comprises: (A) an organic polymer containing a silyl group capable of crosslinking under siloxane bond formation, the silyl group being a group represented by the general formula (1): —SiR1X2; (B) an amidine compound (B-1) as a silanol condensation catalyst; and (C) a carboxylic acid, wherein the ratio between the number of moles (b) of all nitrogen atoms in the (B-1) component of the composition and the number of moles (c) of all carboxyl groups in the (C) component of the composition, namely the ratio (b)/(c), is higher than 2.
64 Citations
7 Claims
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1. A non-organotin curable composition
which comprises: -
(A) an organic polymer containing a silyl group capable of crosslinking under siloxane bond formation, said silyl group being a group represented by the general formula (1);
—
SiR1X2
(1)(wherein R1 represents a group selected from among alkyl groups containing 1 to 20 carbon atoms, aryl groups containing 6 to 20 carbon atoms, aralkyl groups containing 7 to 20 carbon atoms and triorganosiloxy groups represented by (R′
)3SiO—
in which R′
is a hydrocarbon group containing 1 to 20 carbon atoms, the three R′
groups may be the same or different, and X represents a hydroxyl group or a hydrolyzable group and the two X groups may be the same or different);(B) an amidine compound (B-1) as a silanol condensation catalyst; and (C) a carboxylic acid, wherein the ratio between the number of moles (b) of all nitrogen atoms in the (B-1) component of the composition and the number of moles (c) of all carboxyl groups in the (C) component of the composition, namely the ratio (b)/(c), is higher than 2. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification
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- Resources
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Current AssigneeKaneka Corporation
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Original AssigneeKaneka Corporation
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InventorsWakabayashi, Katsuyu, Okamoto, Toshihiko, Noro, Noriko
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Application NumberUS12/279,447Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current525/474CPC Class CodesC08G 65/336 containing siliconC08K 5/0016 PlasticisersC08K 5/31 Guanidine; Derivatives thereofC08L 101/10 containing hydrolysable sil...C08L 2666/22 Macromolecular compounds no...C08L 71/02 Polyalkylene oxidesC09D 201/10 containing hydrolysable sil...C09J 133/14 of esters containing haloge...C09K 3/1018 Macromolecular compounds ha...
