Adhesives

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 293/00 (2006.01) C08L 53/00 (2006.01) C09J 153/00 (2006.01)

Patent

CA 2511433

There are disclosed star shaped thermoplastic elastomers made of acrylic block copolymers obtained by transition metal catalysed radical polymerisation. The elastomers comprise core arms obtained from monomers or mixture of monomers, whose Tg is from about -65~C to about -20~C, and of shell arms obtained from monomers or mixture of monomers, whose Tg is from about 70~C to about 160~C. The core copolymer has a polydispersity of 2 or higher and the final copolymer has a polydispersity of from 3 to 10.

L'invention concerne des élastomères adhésifs étoilés constitués de copolymères à séquence acrylique obtenus par polymérisation de radicaux catalysés d'un métal de transition. Lesdits élastomères sont constitués de bras de noyau obtenus à partir de monomères ou d'un mélange de monomères dont la température de transition vitreuse (T¿g?) est comprise entre environ -65 ·C et environ -20 ·C, et de bras d'enveloppe obtenus à partir de monomères ou d'un mélange de monomères dont la T¿g? est comprise entre environ 70 ·C et environ 160 ·C. Le copolymère noyau présente une polydispersité supérieure ou égale à 2 et le copolymère final présente une polydispersité comprise entre 3 et 10.

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