Patent · US Active

Polyester composition

US8754171B2 · kind B2 · utility

2Cited by

5References

14Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Masahiro Kurouchi · Utsunomiya, JP
Hiroyuki Sumi · Tokyo, JP

Key dates

Filing date	Mar 4, 2013
Grant date	Jun 17, 2014
Priority date	—
Expiry date	Mar 4, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E10/50
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Compositions comprising: (a) 30 to 65 weight percent of a polyester;(b) 7 to 25 weight percent of an ethylene copolymer toughener; (c) 5 to 25 weight percent of a copolyether ester elastomer having a shore D hardness of 20 to 50; optionally (d) 15 to 35 weight percent of a halogenated epoxy flame retardant; and (e) when (d) is present in the composition, optionally, 2 to 10 weight percent of a flame retardant synergist;wherein: the ratio of the combined weight of (b)+(c) relative to the weight of (a) ranges from 0.40 to 0.85; the ratio of the weight of (b) relative to that of (c) ranges from 0.3 to 2.5; and the Gardner impact of the composition, when molded, is at least 4.2 J, measured at −40° C. according to ASTM D5420. Methods of making articles by molding these melt-mixed compositions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.