C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/02 (2006.01) C08L 23/08 (2006.01) C08L 51/04 (2006.01) C08L 69/00 (2006.01)
Patent
CA 2392392
The invention concerns thermoplastic polyesters (such as PET or PBT) comprising, by weight, the total being 100 %: 60 to 99 % of thermoplastic polyester; 1 to 40 % of impact modifier comprising: (a) a core-shell copolymer (A), (b) an ethylene copolymer (B) selected among ethylene copolymers (B1) and an unsaturated carboxylic acid anhydride, ethylene copolymers (B2) and an unsaturated epoxy compound and mixtures thereof, (c) a copolymer (C) selected among ethylene copolymers (C1) and an alkyl (meth)acrylate, ethylene copolymers (C2) and (meth)acrylic acid optionally neutralised and mixtures thereof. The invention also concerns an impact modifying composition which can be added in thermoplastic polyesters to improve their shock-proof properties and comprising constituents (A), (B) and (C).
La présente invention concerne des polyesters thermoplastiques (par exemple, PET ou PBT) comprenant, en poids, le total étant 100 %: 60 à 99 % de polyester thermoplastique; 1 à 40 % de modifiant choc comprenant: (a) un copolymère (A) coeur-écorce, (b) un copolymère (B) de l'éthylène choisi parmi les copolymères (B1) de l'éthylène et d'un anhydride d'acide carboxylique insaturé, les copolymères (B2) de l'éthylène et d'un époxyde insaturé et leurs mélanges, (c) un copolymère (C) choisi parmi les copolymères (C1) de l'éthylène et d'un (méth)acrylate d'alkyle, les copolymères (C2) de l'éthylène et de l'acide (méth)acrylique éventuellement neutralisés et leurs mélanges. La présente invention concerne aussi une composition de mofifiants choc qu'on peut ajouter dans les polyesters thermoplastiques pour améliorer leurs propriétés choc et comprenant les constituants (A), (B) et (C).
Bouilloux Alain
Granel Claude
Lacroix Christophe
Tran Michael
Arkema
Atofina
Robic
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