Polyester synthesis using catalysts having low decomposition tem

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

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

528274, 528302, 528306, 528308, 5283086, 524714, C08G 6342

Patent

active

058802517

ABSTRACT:
An improved two-stage process for the preparation of polyester resins is provided which involves an initial reaction of a dicarboxylic acid such as isophthalic acid with an alkylene oxide such as ethylene or propylene oxide in the presence of a catalyst to form an oligoester reaction mixture, followed by a second stage reaction between the oligoester reaction mixture and a dibasic acid or anhydride; a first-stage catalyst is employed which has a thermal decomposition temperature substantially at or below the second-stage reaction temperature. The most preferred first-stage catalyst is benzyltriethylammonium chloride.

REFERENCES:
patent: 3252941 (1966-05-01), Mayer
patent: 3723390 (1973-03-01), Carpenter
patent: 3804884 (1974-04-01), Jeffrey et al.
patent: 3997511 (1976-12-01), Batzer et al.
patent: 4306056 (1981-12-01), Miyamoto et al.
patent: 4560788 (1985-12-01), Miyamoto et al.
patent: 4812553 (1989-03-01), Harris
patent: 4970333 (1990-11-01), Rabon, Jr. et al.
patent: 5354896 (1994-10-01), Pike et al.

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

Polyester synthesis using catalysts having low decomposition tem does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyester synthesis using catalysts having low decomposition tem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyester synthesis using catalysts having low decomposition tem will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1322370

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