Polyethylene terephthalates which crystallize rapidly and a proc

Details Polyethylene terephthalates which crystallize rapidly and a proc Polyethylene terephthalates which crystallize rapidly and a proc

1980-06-30

1982-02-09

Ziegler, J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 40P, 525444, C08L 6700

Patent

active

043149286

ABSTRACT:
The present invention relates to a polyethylene terephthalate copolyester which crystallizes rapidly and a process to synthesize such a polymer. The polymer is produced by melt homogenizing pure polyethylene terephthalate segments (with minimum intrinsic viscosities above about 0.2 dl/g) with certain specified C.sub.4-10 diols, allowing the mixture to solidify and subjecting the solid product to a solid phase post-condensation reaction. The copolyester has a minimum intrinsic viscosity of 0.4 dl/g and crystallizes more rapidly than either pure polyethylene terephthalate of equivalent molecular weight or copolyester from the same acid and diol units wherein the pure polyethylene terephthalate segments are not significantly prepolymerized before reaction with the co-diols. In a preferred embodiment about 0.23 to 9.1 parts of co-diol per 100 parts of polyethylene terephthalate segment are melt homogenized in an extruder and the extrudate is subject to solid state condensation by the application of elevated temperatures and reduced pressure.

REFERENCES:
patent: 3498952 (1970-03-01), Wiener
patent: 3592876 (1971-07-01), Brinkmann et al.
patent: 3678128 (1972-07-01), Riemhofer et al.
patent: 3714126 (1973-01-01), Reid
patent: 3789031 (1974-01-01), Buttner et al.
patent: 3926920 (1975-12-01), Georgoudis et al.
patent: 3948859 (1976-04-01), Sublett et al.
patent: 4069278 (1978-01-01), Borman
patent: 4086212 (1978-04-01), Bier et al.
patent: 4107149 (1978-08-01), Bier et al.
patent: 4136089 (1979-01-01), Bier et al.
patent: 4176224 (1979-11-01), Bier et al.
patent: 4223106 (1980-09-01), Bier et al.
Encyclopedia of Chemical Technology, Kirk-Othmer-vol. 13, pp. 844-845-New York, New York.
Die Angewandte Makromolekulare Chemie 65, (1977), 1-21, (NR 1005) English translation.

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