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US 2010/0249293 A1Published application
Polyester blends
AssigneeEastman Chemical Company
InventorsMark Allan Treece, Gary Michael Stack, Daniel Henry Bolton
Life of this patent
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Abstract
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.
Claims44
A polyester blend comprising:
- (a) 5 to 95 weight percent of a polyester (A) comprising:
- (i) a dicarboxylic acid portion comprising residues of terephthalic acid, isophthalic acid, or both;
- and
- (ii) a glycol portion comprising 5 to 100 mole percent of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 0 to 95 mole percent of 1,4-cyclohexanedimethanol residues;
- and
- (b) 5 to 95 weight percent of a polyester (B) comprising a polyalkylene terephthalate;
- wherein for each of polyester (A) and 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.
6 more elements
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 terephthalic 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-cyclohexanedimethanol residues;
- (b) 20 to 85 weight percent of polyester (B) comprising a polyethylene terephthalate;
- (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 polyester (A) and 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.
8 more elements
Dependencies are inferred from the claim text.