High softening point copolymer, production process for the...

C - Chemistry – Metallurgy – 08 – F

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C08F 232/06 (2006.01) C08F 8/04 (2006.01) C08F 212/00 (2006.01) C08F 212/08 (2006.01) C08G 61/06 (2006.01)

Patent

CA 2490891

A copolymer having a softening point as high as 100 to 135~C which is obtained by thermally polymerizing cyclopentadiene and/or dicyclopentadiene with a vinylaromatic compound in the presence of a solvent in an amount of 0.1 to 0.5 times, excluding 0.5 times, by weight the amount of all monomers; and a copolymer obtained by hydrogenating the high-softening-point copolymer. The hydrogenated copolymer is suitable for use as a high-softening-point tackifier resin in hot-melt adhesives, etc.

Cette invention concerne un copolymère dont le point de ramollissement peut atteindre une température comprise entre 100 et 135 ·C, lequel copolymère est obtenu par polymérisation thermique de cyclopentadiène et/ou de dicyclopentadiène avec un composé vinylaromatique en présence d'un solvant en une quantité comprise entre 0,1 et 0,5 fois, hormis 0,5 fois, en poids la quantité de l'ensemble des monomères ; et un copolymère obtenu par hydrogénation du copolymère à point de ramollissement élevé. Ce copolymère hydrogéné peut être utilisé comme résine collante à point de ramollissement élevé, notamment dans des adhésifs thermofusibles.

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