Thermoplastic polyester compositions having improved impact...

Details Thermoplastic polyester compositions having improved impact... Thermoplastic polyester compositions having improved impact...

Filed on

2006-10-10

Date issued

2006-10-10

Examiner

Zimmer, Marc S. (Department: 1712)

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

Mixing of two or more solid polymers; mixing of solid...

Other Related Categories

C525S064000, C525S065000, C525S070000, C525S080000, C525S902000

Type

Reexamination Certificate

Status

active

Patent number

07119152

Description

ABSTRACT:
The present invention relates to thermoplastic polyesters, which comprise, by weight:(i) a thermoplastic polyester;(ii) an impact modifier comprising:(a) a core-shell copolymer (A);(b) an ethylene copolymer (B) chosen from ethylene-unsaturated carboxylic acid anhydride copolymers (B1), ethylene-unsaturated epoxide copolymers (B2) and blends thereof;(iii) the (B)/(A) ratio being between 40/60 and 10/90 for proportions of impact modifier between 18 and 40% in 82 to 60% of polyester, respectively;(iv) the (B)/(A) ratio being between 40/60 and 25/75 for proportions of impact modifier between 2 and 18% in 98 to 82% of polyester, respectively. It is particularly useful for PET and PBT.

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