Manufacture of terephthalic acid/2-methylpentamethylene diamine/

Details Manufacture of terephthalic acid/2-methylpentamethylene diamine/ Manufacture of terephthalic acid/2-methylpentamethylene diamine/

1992-05-19

1994-04-12

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528335, 528338, 528339, 528340, 528347, C08G 6928

Patent

active

053026918

ABSTRACT:
A process for the copolymerization of (1) a carboxylic acid consisting of terephthalic acid and mixtures thereof with isophthalic acid with (2) a mixture of hexamethylene diamine and 2-methyl pentamethylene diamine. The combined amount of isophthalic acid and 2-methyl pentamethylene diamine is controlled 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.degree. C. Preferably, the combined amount of isophthalic acid and 2-methyl pentamethylene diamine is greater than 27.5%, molar basis, of the total amount of acid and diamine.

REFERENCES:
patent: 5109106 (1992-04-01), Lahary et al.

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