Lightweight thermoplastic polyester molding compositions, method

Details Lightweight thermoplastic polyester molding compositions, method Lightweight thermoplastic polyester molding compositions, method

1993-07-01

1994-09-20

Short, Patricia A.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525 64, 525167, 525173, 525174, 525177, C08L 2302, C08L 6702

Patent

active

053490070

ABSTRACT:
Lightweight polyester resin molding compositions include a melt-blend of (A) between 97 to 20 parts by weight, based on 100 parts by weight of the total composition weight, of a polyester base resin, (B) between 3 to 80 parts by weight, based on 100 parts by weight of the total composition weight, of a polyolefin resin, (C) between 0.1 to 15 parts by weight, based on 100 parts by weight of the total composition weight, of a compatibilizing compound having a carbon-carbon double bond and an epoxy group in its molecule, (D) between 0.1 to 20% by weight, based on the weight of the compatibilizing compound, of a free radical initiator, and optionally, (E) up to 120 parts by weight, based on 100 parts by weight of the total composition, of a filler material. The free radical initiator is at least one compound having a one-minute half-life temperature of 130.degree. C. or greater, and is preferably pre-blended in solution form with the compatibilizing compound prior to being added to a melt of the polyester base resin and polyolefin resin. The resulting compositions may be molded to form relatively lightweight articles having minimal (if any) propensity to surface peel.

REFERENCES:
patent: 4594388 (1986-06-01), Arai
patent: 5026776 (1991-06-01), Pratt
Database STN vol. 113, No. 24, Dec. 10, 1990, abstract No. 213335b; & JP-A-02167361 (Copolymer Rubber and Chemical Corp.) Jun. 27, 1990.
Patent Abstracts of Japan, vol. 10, No. 226 (C-364)(2282), Aug. 7, 1986; & JP-A-61160744 (Sumitomo Chem. Co. Ltd.) Aug. 31, 1984.

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