Modified polyesters

Details Modified polyesters Modified polyesters

C - Chemistry, Metallurgy

08

L

C08L 67/02 (2006.01)

Patent

CA 2275622

The invention concerns the use of a copolymer comprising (a) between 60 and 98 wt % methylmethacrylate, and (b) between 2 and 40 wt % styrene, and optionally (c) between 0 and 20 wt % maleic acid anhydride, as modifying agents for increasing the melt viscosity for partially crystalline, partially aromatic polyesters, with the exception of polybutylene terephthalate containing intensifier fillers.

L'invention concerne l'utilisation d'un copolymère comprenant: a) entre 60 et 98 % en poids de méthylméthacrylate et b) entre 2 et 40 % en poids de styrène et éventuellement c) entre 0 et 20 % d'anhydride d'acide maléique, comme agent de modification pour augmenter la viscosité à l'état fondu pour des polyesters partiellement cristallins, partiellement aromatiques, le térephtalate de polybutylène contenant une charge d'amplification étant exclu.

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