Polytrimethylene terephthalate resins with improved properties

Details Polytrimethylene terephthalate resins with improved properties Polytrimethylene terephthalate resins with improved properties

2006-04-18

2006-04-18

Acquah, Samuel A. (Department: 1711)

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C528S492000, C525S437000, C525S444000, C524S086000, C524S087000, C524S089000, C524S091000, C524S115000, C524S155000, C428S364000

Reexamination Certificate

active

07029748

ABSTRACT:
A composition comprising Polytrimethylene terephthalate (PTT) with a reduced emission of acrolein is obtained by contacting Polytrimethylene terephthalate (PTT) resin with an effective amount of a melt unstable, organic nitrogen-containing stabilizing compound. Such PTT resin has an acrolein formation rate at 280° C. of less than 15 ppm/minute. Preferably the residual acrolein content of the PTT resin is less than 5 ppm. Preferred additive compounds include amines, amino acids, amidines, urea and other N-compounds. The additive compounds are added to the polymer in molten state and/or to the resin, which is then processed to fibers, filaments, non-wovens, films and/or moldings.

REFERENCES:
patent: 6326456 (2001-12-01), Kelsey et al.
patent: 2002/0010310 (2002-01-01), Allen et al.
patent: 0 078 455 (1983-05-01), None
patent: 1 142 955 (2001-10-01), None
patent: WO 01/81447 (2001-11-01), None
patent: WO 01/81470 (2001-11-01), None

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