Crosslinking agent and curable composition

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/09 (2006.01) C08G 59/42 (2006.01) C08G 67/04 (2006.01) C08G 71/04 (2006.01) C08L 63/00 (2006.01) C08L 73/02 (2006.01) C09D 133/06 (2006.01)

Patent

CA 2091265

-46- The invention provides a crosslinking agent comprising a compound having at least two noncyclic acid anhydride groups and represented by the following formula Image wherein R is a monovalent hydrocarbon group having 2 to 50 carbon atoms, R' is a bivalent hydrocarbon group having 2 to 50 carbon atoms, the hydrocarbon groups R and R' containing or not containing an ether linkage, urethane linkage or ester linkage, and n is an integer of 1 to 500. The invention also provides a curable composition including (A) at least one resin selected from the group consisting of (i) a resin having at least one epoxy group and at least one hydroxyl group in the molecule, (ii) a resin mixture of a resin having at least two epoxy groups in the molecule and a resin having at least two hydroxyl groups in the molecule, and (iii) a resin having at least two epoxy groups in the molecule, and (B) the above-mentioned crosslinking agent.

L'invention présente un agent de réticulation à base d'un composé renfermant au moins deux groupes anhydride d'acide non cyclique et représenté par la formule Image (I), dans laquelle R est un groupe hydrocarboné monovalent de 2 à 50 atomes de carbone, R' est un groupe hydrocarboné bivalent de 2 à 50 atomes de carbone, les groupes R et R' renfermant ou non un lien éther-oxyde, uréthane ou ester, et n est un entier de 1 à 500. L'invention présente également une composition réticulable incluant (A) au moins une résine choisie parmi (i) une résine renfermant au moins un groupe hydroxyle dans la molécule, (ii) un mélange à base d'une résine portant au moins deux groupes époxy dans la molécule et d'une résine portant au moins deux groupes hydroxyles dans la molécule, et (iii) une résine portant au moins deux groupes époxy dans la molécule, et (B) l'agent de réticulation ci-dessus.

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