Grafted polymers with controlled viscosity

Details Grafted polymers with controlled viscosity Grafted polymers with controlled viscosity

C - Chemistry, Metallurgy

08

F

400/2054

C08F 255/02 (2006.01) B32B 27/28 (2006.01) C08F 8/46 (2006.01) C08F 255/00 (2006.01) C08F 291/00 (2006.01) C08L 51/06 (2006.01)

Patent

CA 2216987

The invention relates to a process for preparing grafted thermoplastic polymers in which at least one thermoplastic polymer (A) is grafted with a functional monomer in the presence of a substance that inhibits or reduces cross-linking or depolymerization of (A) This substance can be a stable nitroxide radical. The grafted polymers are useful as compatibility agents in polymer blends and as coextrusion binding agents. The invention also concerns multi-layer structures comprising these binding agents.

L'invention concerne un procédé de préparation de polymères thermoplastiques greffés dans lequel on greffe au moins un polymère thermoplastique (A) par un monomère fonctionnel en présence d'une substance qui inhibe ou réduit la réticulation ou la dépolymérisation de (A). Cette substance peut être un radical nitroxyde stable. Les polymères greffés sont utiles comme compatibilisants dans les mélanges de polymères et comme liants de coextrusion. L'invention concerne aussi des structures multi-couches comprenant ces liants.

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