High pressure process for the manufacture of terephthalic...

C - Chemistry – Metallurgy – 08 – G

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C08G 69/28 (2006.01) C08G 69/26 (2006.01)

Patent

CA 2141821

A process for the copolymerization of (1) a carboxylic acid comprising terephthalic acid and mixtures thereof with isophthalic acid with (2) a mixture of hexamethylene diamine and 2-methyl pentamethylene diamine. The pressure in the polymerization process is maintained at at least about 2.15 MPa for a period of at least about 40 minutes so that the resultant copolyamide, when annealed, has less than 1% by weight based on the total weight of the copolyamide of fractions having melting points greater than 320 °C. Use of lower pressures and times tends to result in formation of a high melting fraction.

On décrit un procédé de copolymérisation 1) d'un acide carboxylique comprenant de l'acide téréphtalique et leurs mélanges avec de l'acide isophtalique avec 2) un mélange de diamine hexaméthylène et de diamine pentaméthylène 2-méthyle. Au cours du processus de polymérisation, on maintient la pression à 2,15 MPa au moins pendant au moins 40 minutes de façon que le copolyamide résultant, une fois recuit, comporte moins de 1 % en poids, par rapport au poids total du copolyamide, de fractions présentant des points de fusion supérieurs à 320 DEG C. Recourir à des pressions et des durées inférieures tend à favoriser la formation d'une fraction à point de fusion élevé.

LandOfFree

Say what you really think

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

Rating

High pressure process for the manufacture of terephthalic... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFCA-PAI-O-1856147

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