Polyester blends

摘要

Polyester blends comprising (1) polyesters prepared from terephthalic acid, 100 to 5 mol % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and 0 to 95 mol % 1,4-cyclohexanedimethanol and (b) polyesters prepared from terephthalic acid and alkylene glycol. The blends may also contain an impact modifier and a phosphorous stabilizer. These blends can have a combination of thermal stability and toughness—making the materials useful in engineering molding plastics, packaging, films, and fibers.

主权项

1. A polyester blend comprising:
(a) 15 to 80 weight percent of a polyester (A) comprising:
(i) a dicarboxylic acid portion comprising 90 to 100 mole percent of residues of tetephthalic acid, isophthalic acid, or both; and(ii) a glycol portion comprising 5 to 50 mole percent of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 50 to 95 mole percent of 1,4-cyclohexenedimethanol residues: (b) 20 to 85 weight percent of a polyester (B) comprising a polyethylene terephthaiate; (c) 2 to 10 weight percent of an impact modifier; and (d) 0 to 1 weight percent of a phosphorus stabilizer; wherein for each of the polyester (A) and the polyester (B), the total mole % of the dicarboxylic acid portion is 100 mole %, and the total mole % of the glycol portion is 100 mole %; and wherein the total weight percentage of the blend equals 100 weight percent.