Hardener for epoxy resin and epoxy resin composition

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 59/50 (2006.01) C08G 59/40 (2006.01) C08G 59/56 (2006.01) C08L 63/00 (2006.01) C09D 163/00 (2006.01)

Patent

CA 2355047

A curing agent for epoxy resins, the curing agent containing as an active ingredient a compound represented by the formula (1) or a salt thereof and an amine compound or a salt thereof, the curing agent being characterized in that at least one of the compound represented by the formula (1) and the amine compound is a salt of thiocyanic acid; and an epoxy resin composition having the curing agent incorporated therein: NH2N(R1) (R2) ~(1) wherein R1 and R2 are the same or different and each represents alkyl having 1 to 8 carbon atoms, aryl, a nitrogen-containing heterocyclic group or when taken together, represents alkylene having 2 to 11 carbon atoms or a group represented by -R3-R4-R5- wherein R3 and R5 are the same or different and each represents alkylene having 1 to 8 carbon atoms, and R4 is an oxygen atom, a sulfur atom or a group =NR.6 or =NNH2, wherein R6 is a hydrogen atom or alkyl having 1 to 8 carbon atoms.

La présente invention concerne un agent de durcissement pour résines époxy, comprenant comme substances actives: un composé représenté par la formule (1): NH2N(R<1>)(R<2>); ou l'un de ses sels, et un composé aminé ou l'un de ses sels, se caractérisant en ce qu'au moins le composé de formule (1) ou le composé aminé est un thiocyanate; et une composition de résine époxy contenant l'agent de durcissement. Dans la formule (1), R<1> et R<2> sont identiques ou différents et représentent chacun alkyle en C1-8, aryle, ou un groupe hétérocyclique azoté, ou R<1> et R<2> sont liés pour former alkylène en C2-11 ou un groupe représenté par R<3>-R<4>-R<5>- où R<3> et R<5> sont identiques ou différents et représentent chacun alkylène en C1-8, et R<4> représente oxygène, soufre, ou un groupe représenté par =NR<6> ou =NNH2, R<6> représentant hydrogène ou alkyle en C1-8.

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