Process for obtaining modified polyethylene terephthalate pillin

Details Process for obtaining modified polyethylene terephthalate pillin Process for obtaining modified polyethylene terephthalate pillin

1991-04-03

1994-04-05

Foelak, Morton

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

Synthetic resins

From carboxylic acid or derivative thereof

26421114, C08G 63695

Patent

active

053006267

ABSTRACT:
The present invention relates to a process for obtaining continuously polyethylene terephthalate modified by --SiO-- groups in a proportion of 300-700 ppm of Si during the direct esterification reaction between terephthalic acid and ethylene glycol, followed by polycondensation in a known manner by introducing methoxyethyl silicate or propyl silicate at a time when the prepolymer has a weight-average molecular mass of between 9,000 and 16,000, a polydispersity index of between 1.5 and 2, and when it is at a temperature of between 260.degree. and 290.degree. C. and at a pressure of between 1.5 and 2.5 bars, the silicate/prepolymer reaction time being at least 5 minutes.
The present invention also relates to pilling-free fibres originating from the modified polyethylene terephthalate and to a process for obtaining them.

REFERENCES:
patent: 3335211 (1967-08-01), Mead et al.
patent: 3475371 (1969-10-01), Stewart et al.
patent: 3917648 (1975-11-01), McLeod

Affiliated with

Also associated with

Rating

Process for obtaining modified polyethylene terephthalate pillin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for obtaining modified polyethylene terephthalate pillin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for obtaining modified polyethylene terephthalate pillin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-512164