Curable resin and process for preparing the same
AssigneeKanegafuchi Kagaku Kogyo Kabushiki Kaisha
InventorsHisao Furukawa, Naotami Ando, Yasushi Kato
Life of this patent
Estimating the term…
Abstract
A curable resin comprising units of at least one prepolymer selected from the group consisting of a prepolymer (C) and a prepolymer (F); the prepolymer (C) having the formula (I): ##STR1## and the prepolymer (F) having the formula (III): ##STR2## The curable resin has the excellent flexibility, solvent resistance and adhesion to organic materials and the properties thereof can be controlled accordingly to desire, in addition to the excellent curability at ordinary temperature, adhesion to inorganic materials and weatherability.
Claims10
A curable resin having a number average molecular weight of 1,000 to 100,000 and comprising units of a prepolymer (C) having a number average molecular weight of 200 to 60,000 and units of a vinyl monomer (D) having a molecular weight of 53 or greater, said prepolymer (C) having the formula (I):
- ##STR16## wherein R.sup.1 is an alkyl, aryl or aralkyl group having 1 to 10 carbon atoms;
- R.sup.2 is a bivalent group having 1 to 10 carbon atoms selected from the group consisting of alkylene groups, arylene groups and aralkylene groups;
- R.sup.4 and R.sup.5 are the same or different and each is a hydrogen atoms or an alkyl group having 1 to 10 carbon atoms;
- X is a hydrolyzable group selected from the group consisting of a halogen atom, an alkoxy atom, an acyloxy group, a ketoxymate group, an amino group, an acid amide group, an aminooxy group, a mercapto group and an alkenyloxy group;
- Y is ##STR17## in which R.sup.3 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms;
- Z is a residue of an oligomer (A) having a number average molecular weight of 100 to 50,000 and having at least two groups selected from the group consisting of acryloyloxy groups and methacryloyloxy groups, p and q are an integer of one or more satisfying the equation 2.ltoreq.p+q.ltoreq.8;
- n is an integer of 1 to 3, and m is an integer of 1 to 10.
A process for preparing a curable resin having a number average molecular weight of 1,000 to 100,000, which comprises copolymerizing a prepolymer (C) having a number average molecular weight of 200 to 60,000 with a vinyl monomer (D) having a molecular weight of 53 or greater in a weight ratio of said vinyl monomer (D) to said prepolymer (C) of 100:0.1 to 10,000, said prepolymer having the formula (I):
- ##STR18## wherein R.sup.1 is an alkyl, aryl or aralkyl group having 1 to 10 carbon atoms;
- R.sup.2 is a bivalent group having 1 to 10 carbon atoms selected from the group consisting of alkylene groups, arylene groups and aralkylene groups;
- R.sup.4 and R.sup.5 are the same or different and each is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms;
- X is a hydrolyzable group selected from the group consisting of a halogen atom, an alkoxy group, an acyloxy group, a ketoxymate group, an amino group, an acid amide group, an aminooxy group, a mercapto group and an alkenyloxy group;
- Y is --S-- or ##STR19## in which R.sup.3 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms;
- Z is a residue of an oligomer (A) having at least two groups selected from the group consisting of acryloyl group and methacryloyl group and p and q are the same or different and each is an integer of one or more satisfying the equation 2.ltoreq.p+q.ltoreq.8;
- n is an integer of 1 to 3, and m is an integer of 1 to 10.
Dependencies are inferred from the claim text.