Continuous process for the production of polyamides

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C528S335000, C528S332000, C528S340000, C528S348000, C528S349000

Reexamination Certificate

active

07009028

ABSTRACT:
In a two-step precondensate process for preparing polyamides diamines are reacted with dicarboxylic acid dihalides in a polar, non-basic, inert organic liquid medium under conditions such that a condensation product having a low degree of polymerization is formed. The resulting condensation then is contacted with an aqueous solution of a water-soluble acid acceptor by continuously feeding the components into a reactor system having a total residence time from about 2 seconds to about 2 minutes, and having a Peclet number greater than about 3.5 to form a polyamide product having a high degree of polymerization.

REFERENCES:
patent: 3006899 (1961-10-01), Hill, Jr. et al.
patent: 3063966 (1962-11-01), Kwolek et al.
patent: 3094511 (1963-06-01), Hill, Jr. et al.
patent: 3640970 (1972-02-01), Ozawa et al.
patent: 4009154 (1977-02-01), Noma et al.
patent: 4885356 (1989-12-01), Milligan et al.
patent: 5432255 (1995-07-01), Jung et al.
patent: 6169162 (2001-01-01), Bush et al.
patent: 117 967 (1976-02-01), None
patent: 26 06 878 (1977-09-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Continuous process for the production of polyamides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuous process for the production of polyamides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for the production of polyamides will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3588750

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.