Impact-resistant epoxide resin compositions

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 63/00 (2006.01) C08G 59/00 (2006.01) C08G 59/42 (2006.01) C08G 59/52 (2006.01) C09J 163/00 (2006.01)

Patent

CA 2346634

Condensation products comprised of carboxylic acid dianhydrides, diamines or polyamines, especially polyoxyalkylene amines and polyphenolene or aminophenolene are suited as structural constituents for epoxide resin compositions. In addition, these compositions contain conventional rubber- modified epoxide resins and liquid and/or solid polyepoxides and conventional hardeners and accelerators, and they optionally contain fillers and rheology auxiliary agents. The inventive compositions are suited as impact-resistant, impact-peel-resistant and peel-resistant adhesives used in vehicle manufacturing and in electronics. These adhesives exhibit very good impact- peel characteristics, especially at very low temperatures.

L'invention concerne des produits de condensation comprenant des dianhydrides d'acide carboxylique, des di- ou polyamines, notamment des amines de polyoxyalkylène et du polyphénolène ou de l'aminophénolène, qui s'utilisent comme constituants structuraux pour des compositions à base de résine époxyde. Ces compositions comprennent en outre des résines époxydes modifiées par caoutchouc classiques, ainsi que des polyépoxydes liquides et/ou solides, ainsi que des durcisseurs et des activateurs classiques et éventuellement des charges et des auxiliaires rhéologiques. Ce type de compositions s'utilisent comme adhésifs anti-chocs, anti-arrachement aux chocs et anti-arrachement dans le domaine de la construction automobile et dans le domaine de l'électronique. Ces adhésifs présentent de très bonnes propriétés anti-chocs, anti-arrachement, en particulier à très basses températures.

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