Modified pet polymers and copolymers suitable for extrusion...

Details Modified pet polymers and copolymers suitable for extrusion... Modified pet polymers and copolymers suitable for extrusion...

C - Chemistry, Metallurgy

08

G

402/187

C08G 63/20 (2006.01)

Patent

CA 1265292

ABSTRACT There is disclosed an improved modified polymer suitable for use in making hollow containers by conventional extrusion blow molding. It is a specific type of end-capped and branched polyethylene terephthalate polymer or copolymer. In the improvement, (a) the end-cap comprises the reacted component of a monofunctional acid having a normal boiling point or sublimation point less than above about 200°C; and (b) the monofunctional acid is an aromatic monocarboxylic acid having the formula: Image wherein: R3 and/or R5 is an alkoxy group containing from 1 to 10 carbon atoms; and, the remaining R's are hydrogen. The preferred monocarboxylic acid is m-anisic acid. The product typically contains few large gels having diameters greater than 0.1mm.

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