Patent ID: 6444775
Filing Date: 2002-09-03
Classification: C08G,C08L,Y10S

Abstract:
A curable composition comprising (A) a reactive silicon group-containing polyether polymer and (B) dibutyltin diacetylacetonate as a silanol condensation catalyst,said (A) reactive silicon group-containing polyether polymer having a partial structure of the following general formula (1) per molecule: â€”Oâ€”R1â€”CH(CH3)â€”CH2â€”(Si(R22âˆ’b)(Xb)O)mSi(R33âˆ’a)Xaâ€ƒâ€ƒ(1) wherein R1 represents a divalent organic group containing 1 to 20 carbon atoms and one or more constituent atoms selected from the group consisting of hydrogen, oxygen and nitrogen; R2 and R3 may be the same or different and each represents an alkyl group containing 1 to 20 carbon atoms, an aryl group containing 6 to 20 carbon atoms, an aralkyl group containing 7 to 20 carbon atoms or a triorganosiloxy group of the formula (Râ€²)3SiOâ€”; when 2 or more R2 or R3 groups are present, they may be the same or different; Râ€² represents a monovalent hydrocarbon group containing 1 to 20 carbon atoms and three Râ€² groups may be the same or different; X represents a hydroxyl group or a hydrolyzable group and when two or more X groups are present, they may be the same or different; a represents 0, 1, 2 or 3; b represents 0, 1 or 2; b may be the same or different over m repeats of (Si(R22âˆ’b)(Xb)O); m represents an integer of 0 to 19: provided that the relation of a+&Sgr;b &gE;1 is satisfied, and wherein not less than 85% of the number of molecular chain terminals have the reactive silicon groups as determined by NMR analysis in said (A) reactive silicon group-containing polyether polymer.