Toughened cyanoacrylate adhesive composition containing...

C - Chemistry – Metallurgy – 09 – J

Patent

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C09J 4/06 (2006.01) C09J 4/04 (2006.01)

Patent

CA 2076623

A cyanoacrylate adhesive composition having improved toughness comprising a cyanoacrylate monomer and an effective toughening amount of a polyester polymer derived from a dibasic aliphatic or aromatic carboxylic acid and a glycol and having repeating units of the structure: (see fig. I) where R is the organic residue of the dibasic carboxylic acid and R1 is the organic residue of the glycol, the polyester having a weight average molecular weight of greater than 10,000 and a Tg of from about -40 to 30°C.

Une composition d'adhésif de cyanoacrylate ayant une ténacité améliorée comprenant un monomère de cyanoacrylate et une quantité efficace du point de vue de la ténacité d'un polymère de polyester dérivé d'un acide carboxylique aliphatique ou aromatique dibasique et d'un glycol et présentant les motifs de structure : (voir fig. I) où R est le résidu organique de l'acide carboxylique dibasique et R1 est le résidu organique du glycol, le polyester présentant un poids moléculaire moyen pondéral supérieur à 10 000 et une Tg variant d'environ -40 à 30 degrés C.

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