Concentrates for improving polyester compositions and method of

Details Concentrates for improving polyester compositions and method of Concentrates for improving polyester compositions and method of

1997-09-09

1998-09-01

Short, Patricia A.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521138, 525107, 264 54, 264211, C08L 6702

Patent

active

058012060

ABSTRACT:
Disclosed is a concentrate useful as an additive in a polyester composition comprising a polyolefin and a polyfunctional carboxylic acid or polyol branching agent. Also disclosed is a method of preparing a polyester composition having increased melt viscosity and melt strength, and improved impact strength which comprises the steps of
A) melt compounding a polyolefin and a polyfunctional carboxylic acid or polyol branching agent,
B) dry blending the melt compounded mixture formed in A) with a polyester, and
C) molding or extruding the dry blended mixture formed into B) to form an article.

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