Polyesters compositions which crystallize rapidly

Details Polyesters compositions which crystallize rapidly Polyesters compositions which crystallize rapidly

1979-05-18

1984-03-06

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

264239, 264176R, 524730, 528272, 528302, 5283082, 5283086, C08F28300, C08G 6376, C08L 6700

Patent

active

044355467

ABSTRACT:
Polyalkylene terephthalates containing 0.5-30% by weight of monomeric aliphatic carboxylic acid esters have a higher crystallization speed and thus allow lower mold temperatures and shorter injection cycles. The polyalkylene terephthalates generally have intrinsic viscosities in excess of about 0.4 dl/g in 1:1 phenol tetrachloroethane at 25.degree. C. and are at least about 90 mol % terephthalic acid based. The ester additive is based on aliphatic cycloaliphatic or araliphatic carboxylic acids, with sebacic and adipic being preferred, and aliphatic, cycloaliphatic or araliphatic alcohols.
Faster crystallization rates can be imparted to polyalkylene terephthalates by mixing them with the ester additive and melt homogenizing the mixture.

REFERENCES:
patent: 3134744 (1964-05-01), Starck et al.
patent: 3368995 (1968-02-01), Furukawa et al.
patent: 3372148 (1968-03-01), Wiener
patent: 3435093 (1969-03-01), Cope
patent: 3516957 (1970-06-01), Gray
patent: 3565852 (1971-02-01), Conix et al.
patent: 3576774 (1971-04-01), Myers et al.
patent: 3639527 (1972-02-01), Brinkmann
patent: 3644267 (1972-02-01), Jackson et al.
patent: 3673139 (1972-06-01), Hrach
patent: 3692744 (1972-09-01), Rich et al.
patent: 3707578 (1972-12-01), Vasta
patent: 3835089 (1974-09-01), Fox et al.
patent: 3843615 (1974-10-01), Herwig et al.
patent: 3892821 (1975-07-01), Koleske et al.
patent: 3907926 (1975-09-01), Brown et al.
patent: 3966671 (1976-06-01), Smith
patent: 4049611 (1977-09-01), Hirzy
patent: 4097421 (1978-06-01), Chang
patent: 4125572 (1978-11-01), Scott
patent: 4135009 (1979-01-01), Mercurio

Affiliated with

Also associated with

Rating

Polyesters compositions which crystallize rapidly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyesters compositions which crystallize rapidly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyesters compositions which crystallize rapidly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-742445