High-temperature adhesive compositions

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 147/00 (2006.01) C08C 19/18 (2006.01) C09J 5/00 (2006.01) C09J 115/02 (2006.01) C09J 151/04 (2006.01) C09J 161/06 (2006.01)

Patent

CA 2107101

A one-coat adhesive composition which utilizes environmentally acceptable ingredients and which can withstand high temperature conditions such as those experienced during injection molding processes. The adhesive contains a Diels-Alder adduct of a perhalogenated cyclic conjugated diene and an olefinically unsaturated dienophile having a vinyl content in excess of 50 percent, a phenolic resin, an aromatic hydroxy compound, a formaldehyde donor, a heat-activated unsaturated elastomer crosslinker, a vulcanizing agent, and a metal oxide. An adhesive bond prepared with the adhesive is resistant to high temperature fluids and corrosive agents.

L'invention porte sur une composition adhésive monocouche, qui utilise des ingrédients de type écologique et peut résister à de hautes températures, comme celles que l'on trouve dans les procédés de moulage par injection. L'adhésif renferme un produit d'addition Diels-Alder d'une diène cyclique conjuguée perhalogénée et d'un composé diénophile avec insaturation oléfinique renfermant plus de 50 % de vinyle, une résine phénolique, un composé aromatique hydroxylé, un donneur de type formaldéhyde, un réticulant à base d'élastomère insaturé thermoactivé, un agent de vulcanisation, et enfin un oxyde métallique. Un lien d'adhérence obtenu à l'aide de l'adhésif résiste bien aux fluides à haute température et aux agents corrosifs.

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