Moisture-curable composition and adhesive containing the composition

A moisture-curable composition, comprising:

• a silane-modified polymer (A) which is selected from α-silane-terminated polymers having the crosslinkable alkoxysilyl group bonded to an adjacent urethane unit via a methylene spacer and represented by the general formula (1)
• wherein Y is an x-valent polymer group bonded via said urethane unit to the group —[CH2—SiR1a(OR2)3-a]x,
• wherein R1 is a monovalent, optionally substituted SiC-bonded hydrocarbon group,
• wherein R2(s) may be the same as or different from each other and is a hydrogen atom or a monovalent, optionally substituted hydrocarbon group,
• wherein x is an integer of 1 to 10, and
• wherein a is 1;
• a (meth)acrylate polymer (B) containing a crosslinkable silyl group in the molecule;
• and
• an amine-based catalyst (C) having at least one alkoxy group.

A method of improving water-resistant adhesive properties by bonding a substrate and a cured product obtained by curing a moisture-curable composition, comprising:

• providing a moisture-curable composition, wherein the moisture-curable composition comprises a silane-modified polymer (A), a (meth)acrylate polymer (B) containing a crosslinkable silyl group in the molecule, and an amine-based catalyst (C) having at least one alkoxy group;
• wherein the silane-modified polymer (A) is selected from α-silane-terminated polymers having the crosslinkable alkoxysilyl group bonded to an adjacent urethane unit via a methylene spacer and represented by the general formula (1)
• wherein Y has a polymer chain which is a polyoxyalkylene, and is a group bonded to a group of —[CH2—SiR1a(OR2)3-a] via said urethane unit,
• wherein R1 is a monovalent, optionally substituted SiC-bonded hydrocarbon group,
• wherein R2(s) may be the same as or different from each other and is a hydrogen atom or a monovalent, optionally substituted hydrocarbon group,
• wherein R′ is a monovalent, optionally substituted SiC-bonded hydrocarbon group,
• wherein x is an integer of 1 to 10, and
• wherein a is 1;
• and
• using the moisture-curable composition that includes the component (B) that is a (meth)acrylate polymer containing a crosslinkable silyl group in the molecule to make a tensile adhesion strength between the substrate and the cured product after performing a water immersion test, in which the substrate and the cured product are immersed in water at 23° C. for 168 hours, 1.0 times or more of a tensile adhesion strength before performing the water immersion test.

An adhesive or a sealing material, comprising:

• wherein the adhesive or a sealing material comprises a moisture-curable composition comprising a silane-modified polymer (A), a (meth)acrylate polymer (B) containing a crosslinkable silyl group in the molecule, and an amine-based catalyst (C) having at least one alkoxy group;
• wherein the silane-modified polymer (A) is selected from α-silane-terminated polymers having the crosslinkable alkoxysilyl group bonded to an adjacent urethane unit via a methylene spacer and represented by the general formula (1)
• wherein Y is an x-valent polymer group bonded via said urethane unit to the group —[CH2—SiR1a(OR2)3-a]x,
• wherein R1 is a monovalent, optionally substituted SiC-bonded hydrocarbon group,
• wherein R2(s) may be the same as or different from each other and is a hydrogen atom or a monovalent, optionally substituted hydrocarbon group,
• wherein x is an integer of 1 to 10, and
• wherein a is 1.

A laminated body, comprising:

• a substrate;
• and
• a cured product, wherein the cured product is a moisture-curable composition comprises a silane-modified polymer (A), a (meth)acrylate polymer (B) containing a crosslinkable silyl group in the molecule, and an amine-based catalyst (C) having at least one alkoxy group;
• wherein the silane-modified polymer (A) is selected from α-silane-terminated polymers having the crosslinkable alkoxysilyl group bonded to an adjacent urethane unit via a methylene spacer and represented by the general formula (1)
• wherein Y is an x-valent polymer group bonded via said urethane unit to the group —[CH2—SiR1a(OR2)3-a]x,
• wherein R1 is a monovalent, optionally substituted SiC-bonded hydrocarbon group,
• wherein R2(s) may be the same as or different from each other and is a hydrogen atom or a monovalent, optionally substituted hydrocarbon group,
• wherein x is an integer of 1 to 10, and
• wherein a is 1.