Abstract: A (meth)acrylic ester copolymer (A) has a reactive silicon group represented by the following formula (1): —SiR1cX3-c (1), wherein R1 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, X is a hydroxy group or a hydrolyzable group, and c is 0 or 1. A monomer component of the (meth)acrylic ester copolymer (A) includes a (meth)acrylic ester (a1), a polyoxyalkylene polymer (a2) having more than one (meth)acryloyl groups per molecule, and a chain transfer agent (a3) having a mercapto group. The molar ratio of the polyoxyalkylene polymer (a2) to the chain transfer agent (a3) is 0.06 or more. The monomer component further includes a monomer (a4) having a reactive silicon group and a polymerizable unsaturated group, and/or the chain transfer agent (a3) further has a reactive silicon group.

Abstract: Provided is a (meth)acrylic ester copolymer (B) having a reactive silicon group represented by the following formula (1): —SiR5cX3-c (1). R5 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, X is a hydroxy group or a hydrolyzable group, and c is 0 or 1. A monomer component of the copolymer includes a (meth)acrylic ester (b1), a (meth)acrylic ester polymer (b2) having more than one (meth)acryloyl groups per molecule, and a chain transfer agent (b3) having a mercapto group. The monomer component further includes a monomer (b4) having a reactive silicon group and a polymerizable unsaturated group, and/or the chain transfer agent (b3) having a mercapto group further has a reactive silicon group.

Abstract: A multi-part curable composition includes an A part including a polyoxyalkylene polymer (A) having a reactive silicon group, a (meth)acrylic ester polymer (B) having a reactive silicon group, an epoxy resin curing agent (D) having a tertiary amine moiety, an alicyclic structure-containing amine (E1), and a B part including an epoxy resin (C). Each of the reactive silicon groups of the polymer (A) and polymer (B) are represented by —SiR5cX3-c. R5 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, X is a hydroxy group or a hydrolyzable group, and c is 0 or 1. A multi-part curable composition includes an A part including the polymer (A), polymer(B), and an epoxy resin curing agent (D) having a tertiary amine moiety, and a B part including an epoxy resin (C), where either or both of the A and B parts include an amino alcohol compound (E2).

Abstract: A polymer blend including an organic polymer with a reactive silicon-containing group which gives cured objects excellent elongation property and stress relaxation, a composition including the polymer blend, a specific filler, and a curing catalyst, a sealant including the composition; and a sealant for tires, are provided. A polymer blend including an organic polymer with a bifunctional reactive silicon-containing group of a specific structure is mixed with polyoxyalkylene (A). Polyoxyalkylene (A) has an average molecular weight of 13,000 or higher and 100,000 or lower, a reactive-silicon-containing-group equivalent Eqa of 0.010 mmol/g or more and 0.29 mmol/g or less, and contains more than one silicon-containing group per molecule and polyoxyalkylene (B). Polyoxyalkylene (B) has an average molecular weight of 3,000 or higher and 25,000 or lower, a reactive-silicon-containing group only at one end, and a reactive-silicon-containing-group equivalent Eqb of 0.03 mmol/g or more and 0.58 mmol/g or less.

Abstract: A multi-part curable composition includes: an A part including a polyoxyalkylene polymer (A) having a reactive silicon group, a (meth)acrylic ester polymer (B) having a reactive silicon group, and an epoxy resin curing agent (D); and a B part including an epoxy resin (C) and a silanol condensation catalyst (E). The (meth)acrylic ester polymer (B) is a polymer containing constituent monomers including 40 to 70% by weight of an alkyl (meth)acrylate (b1) having an alkyl having 1 to 3 carbon atoms, a monomer (b2) having a reactive silicon group and a polymerizable unsaturated group, and a macromonomer (b3) that is a (meth)acrylic ester polymer having a polymerizable unsaturated group.

Abstract: A curable composition includes a (meth)acrylic acid ester polymer (A), wherein the (meth)acrylic acid ester polymer (A) includes a monomer and a macromonomer (a). The monomer includes a reactive silicon group represented by the general formula (1): —SiR1aX3-a (1) (in the formula, R1 represents a substituted or unsubstituted hydrocarbon group with 1 to 20 carbon atoms, X each independently represents a hydroxyl group or a hydrolyzable group, and a represents 0 or 1.) and a polymerizable unsaturated group. The macromonomer (a) is a (meth)acrylic acid ester polymer having a polymerizable unsaturated group.

Abstract: A curable composition includes organic polymer (A) having more than one reactive silicon group on average per molecule, represented by formula (1): —SiR1aX3-a (1), wherein R1 is a substituted or unsubstituted hydrocarbon group having 1-20 carbon atoms, each X is independently a hydroxy group or a hydrolyzable group, and a is 0 or 1, and (meth)acrylate-based polymer (B) having a reactive silicon group represented by formula (2): —SiX3 (2), wherein each X is as defined for the formula (1), polymer (B) has a reactive silicon group equivalent of not less than 0.30 mmol/g, and wherein a monomer (b1) is free of a reactive silicon group, a glass transition temperature of its homopolymer is not more than 80° C., and is contained as monomer(s) constituting polymer (B) in a proportion of not less than 40 wt % per 100 wt % of total monomer.

Abstract: A curable composition includes a (meth)acrylic acid ester polymer (A), wherein the (meth)acrylic acid ester polymer (A) includes a monomer and a macromonomer (a). The monomer includes a reactive silicon group represented by the general formula (1): —SiR1aX3-a (1) (in the formula, R1 represents a substituted or unsubstituted hydrocarbon group with 1 to 20 carbon atoms, X each independently represents a hydroxyl group or a hydrolyzable group, and a represents 0 or 1.) and a polymerizable unsaturated group. The macromonomer (a) is a (meth)acrylic acid ester polymer having a polymerizable unsaturated group.

Abstract: A curable composition iaciudes a polyoxyalkylene-based polymer (A); and a (meth)acrylate-based polymer (B), wherein the polyoxyalkylene-based polyer (A) has more than 1.0 reactive silicon group on average per one terminal portion, and the (meth)acrylate-based polymer (B) has more than or equal to 1.0 reactive silicon group on average per one molecule, wherein the (meth)acrylate-based polymer (B) is represented by the formula (1): —SiRX2 (1) wherein R is a hydrocarbon group having 1-20 carbon atoms or a hydrocarbon group having 1-20 carbon atoms substituted with a hetero atom-containing group or a halogen atom, and X is a hydroxyl group or a hydrolyzable group.

Abstract: Provided is a curable composition having low viscosity and good workability before curing, and affording a cured product having high strength. The above-mentioned problem can be solved by using a curable composition containing organic polymer (A) having a reactive silicon group and (meth)acrylate-based polymer (B) having a trifunctional reactive silicon group, and having a reactive silicon group equivalent of not less than 0.30 mmol/g, wherein monomer (b1) having a glass transition temperature of a homopolymer of not more than 80° C. is contained as a monomer constituting polymer (B) in a proportion of not less than 40 wt % per 100 wt % of the total monomer unit.

Abstract: The present invention aims to provide a curable composition that is usable in fast curing adhesives and the like and has excellent curability and excellent initial adhesion. The aim is accomplished by use of a curable composition that contains a polyoxyalkylene polymer (a1) having a reactive silyl group (e.g., trimethoxysilyl group) equivalent of 0.15 mmol/g to 1.5 mmol/g and a polyoxyalkylene polymer (a2) having a reactive silyl group equivalent of 0.010 to 0.14 mmol/g. Preferably, the polymers (a1) and (a2) both have a backbone with at least one branch.

Abstract: The present invention provides a curable composition containing oxyalkylene-based polymer (A) having more than one reactive silicon group represented by the formula (1): —SiR1aX3-a on average in one molecule, (meth)acrylate-based polymer (B) having a reactive silicon group represented by the formula (2): —SiX3 and a reactive silicon group equivalent of not less than 0.30 mmol/g, and high-molecular weight plasticizer (C) having 0-1 reactive silicon group on average in one molecule (the groups in the formulas (1) and (2) are as defined in the DESCRIPTION).

Abstract: The present invention aims to provide a curable composition that is usable in fast curing adhesives and the like and has excellent curability and excellent initial adhesion. The aim is accomplished by use of a curable composition that contains a polyoxyalkylene polymer (a1) having a reactive silyl group (e.g., trimethoxysilyl group) equivalent of 0.15 mmol/g to 1.5 mmol/g and a polyoxyalkylene polymer (a2) having a reactive silyl group equivalent of 0.010 to 0.14 mmol/g. Preferably, the polymers (a1) and (a2) both have a backbone with at least one branch.

Abstract: An object of the present invention is to provide a curable composition that provides high hardness and can be used in adhesives and coating agents. This object can be achieved by a curable composition containing: 100 parts by weight of a reactive silyl group-containing organic polymer (A) that has a number average molecular weight of 2,000 to 6,000 and contains 1.3 to 5 reactive silyl groups per molecule; and 0 to 40 parts by weight of a plasticizer (C). This curable composition is suitable for flooring adhesives and tile adhesives, which require high hardness.

Abstract: An object of the present invention is to provide a curable composition that can be used as sealing materials, adhesives, and the like, has excellent curing properties, and gives a cured product excellent in elongation properties. The object can be attained by means of a curable composition comprising: a reactive silyl group-containing polyether polymer (A) that contains a reactive silyl group with high activity (e.g., (ClCH2)(CH3O)2Si—, (CH3OCH2)(CH3O)2Si—, or CH3(CH3O)2Si—CH2—NH—C(?O)—); and a reactive silyl group-containing polyether polymer (B) that contains a reactive silyl group (e.g., CH3(CH3O)2Si— or (CH3O)3Si—) different from that mentioned above and/or a (meth)acrylic polymer (C) containing a reactive silyl group that is not particularly limited.

Abstract: An object of the present invention is to provide a curable composition that provides high hardness and can be used in adhesives and coating agents. This object can be achieved by a curable composition containing: 100 parts by weight of a reactive silyl group-containing organic polymer (A) that has a number average molecular weight of 2,000 to 6,000 and contains 1.3 to 5 reactive silyl groups per molecule; and 0 to 40 parts by weight of a plasticizer (C). This curable composition is suitable for flooring adhesives and tile adhesives, which require high hardness.

Abstract: An object of the present invention is to provide a curable composition that can be used as sealing materials, adhesives, and the like, has excellent curing properties, and gives a cured product excellent in elongation properties. The object can be attained by means of a curable composition comprising: a reactive silyl group-containing polyether polymer (A) that contains a reactive silyl group with high activity (e.g., (ClCH2)(CH3O)2Si—, (CH3OCH2)(CH3O)2Si—, or CH3(CH3O)2Si—CH2—NH—C(?O)—); and a reactive silyl group-containing polyether polymer (B) that contains a reactive silyl group (e.g., CH3(CH3O)2Si— or (CH3O)3Si—) different from that mentioned above and/or a (meth)acrylic polymer (C) containing a reactive silyl group that is not particularly limited.

Abstract: An object of the present invention is to provide a curable composition that can be used as sealing materials, adhesives, and the like, has excellent curing properties, and gives a cured product excellent in elongation properties. The object can be attained by means of a curable composition comprising: a reactive silyl group-containing polyether polymer (A) that contains a reactive silyl group with high activity (e.g., (ClCH2)(CH3O)2Si—, (CH3OCH2)(CH3O)2Si—, or CH3(CH3O)2Si—CH2—NH—C(?O)—); and a reactive silyl group-containing polyether polymer (B) that contains a reactive silyl group (e.g., CH3(CH3O)2Si— or (CH3O)3Si—) different from that mentioned above and/or a (meth)acrylic polymer (C) containing a reactive silyl group that is not particularly limited.