Polytrimethylene terephthalate resin

Details Polytrimethylene terephthalate resin Polytrimethylene terephthalate resin

2007-04-03

2007-04-03

Acquah, Samuel A. (Department: 1711)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

C528S308600, C528S491000, C528S503000, C525S437000, C428S357000, C264S177170, C264S210100, C264S211120

Reexamination Certificate

active

10512467

ABSTRACT:
A polytrimethylene terephthalate resin comprising: 90 to 100 mole % of trimethylene terephthalate recurring units, and 0 to 10 mole % of at least one monomer unit obtained from a comonomer other than the monomers used for forming the recurring units and copolymerizable with at least one of the monomers used for forming the recurring units, which resin has the following characteristics: (A) an intrinsic viscosity [η] of from 0.8 to 4.0 dl/g; (B) an Mw/Mn of from 2.0 to 2.7; (C) a psychometric lightness L-value (L-1) of from 70 to 100 and a psychometric chroma b*-value (b*-1) of from −5 to 25; and (D) a psychometric lightness L-value (L-2) of from 70 to 100 and a psychometric chroma b*-value (b*-2) of from −5 to 25 as measured after heating the resin at 180° C. for 24 hours in air.

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