Process for separating low molecular weight compounds from polyc

Details Process for separating low molecular weight compounds from polyc Process for separating low molecular weight compounds from polyc

1989-10-06

1990-10-16

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528323, 528499, 528500, C08G 6946

Patent

active

049636502

ABSTRACT:
A process for separating low molecular weight compounds from a crude polycaproamide melt comprises heat treating the melt in vacuo with superheated steam, in an extruder having a plurality of degassing zones, under precise conditions of temperature, pressure and configuration, such that the occurrence of side reactions and dehydration of the melt are substantially eliminated, the molecular weight of the polymer during the heat treatment in vacuo, during transport and subsequent processing remains substantially unchanged, a residual content of low molecular weight compounds of .ltoreq.1.8% is achieved, and the operating flexibility of the process is increased.

REFERENCES:
patent: 3361721 (1968-01-01), Markel et al.
patent: 4891420 (1990-01-01), Martin et al.

Affiliated with

Also associated with

Rating

Process for separating low molecular weight compounds from polyc 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 separating low molecular weight compounds from polyc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for separating low molecular weight compounds from polyc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-850564