Patent ID: 6350345
Filing Date: 2002-02-26
Classification: C08L,C09J,Y10S

Abstract:
A curable resin compositionwhich comprises (I) a reactive silicon group-containing polyether oligomer, (II) a copolymer comprising a molecular chain substantially composed of one or more acrylate ester monomer units and/or methacrylate ester monomer units and (III) an accelerator, said reactive silicon group-containing polyether oligomer having, within the molecule thereof, a partial structure represented by the general formula (1): â€”Oâ€”R1â€”CH(R2)â€”CH2â€”(Si(R32âˆ’b)(Xb)O)mSi(R43âˆ’a)Xaâ€ƒâ€ƒ(1) wherein R1 represents a divalent organic group of 1 to 20 carbon atoms containing at least one constituent element selected from the group consisting of hydrogen, oxygen and nitrogen, R2 represents an alkyl group of 1 to 10 carbon atoms, R3 and R4 may be the same or different and each represents an alkyl group of 1 to 20 carbon atoms, an aryl group of 6 to 20 carbon atoms or an aralky) group of 7 to 20 carbon atoms or a triorganosiloxy group of the formula (Râ€²)3SiOâ€”, in which Râ€² is a monovalent hydrocarbon group of 1 to 20 carbon atoms and the three Râ€² groups may be the same or different, and where there are two or more R3 or R4 groups, they may be the same or different; X represents a hydroxyl group or hydrolyzable group and, where there are two or more X groups, they may be the same or different; a represents 0, 1, 2 or 3, b represents 0, 1 or 2, m represents an integer of 0 to 19, and the b's in the m â€”(Si(R32âˆ’b)(Xb)â€”O)â€” groups may be the same or different, provided that the condition a+&Sgr;b&gE;1 is satisfied; wherein said component (I) is obtained by reacting a polyether oligomer having an unsaturated bond introduced therein of the general formula (2): â€”Oâ€”R1â€”C(CH3)&boxH;CH2â€ƒâ€ƒ(2) wherein R1 is as defined above, with a reactive silicon group-containing compound represented by the general formula (3): Hâ€”(Si(R32âˆ’b)(Xb)â€”O)mSi(R43âˆ’a)Xaâ€ƒâ€ƒ(3) wherein R3, R4, a, b, m and X are as defined above, in an oxygen-containing atmosphere in the presence of a catalyst and elemental sulfur.