Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1994-12-22
1997-09-23
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528335, 528340, 528347, 528348, 524443, 524444, 524606, 524607, 525432, C08G 6926, C08K 300, C08L 7700
Patent
active
056706081
ABSTRACT:
A polyamide (9-T polyamide) comprising (a) 60 to 100 mole of terephthalic acid and (b) a diamine component comprising 60 to 100 mole % of determined by measurement in concentrated sulfuric acid at 30.degree. C. of 0.6 to 2.0 dl/g and having at least 10% of terminal groups thereof blocked. Another polyamide (9M-T polyamide) comprises a dicarboxylic acid component (a) comprising 60 to 100 mole % of terephthalic acid and a diamine component (b) comprising 60 to 100 mole % of 1,9-nonanediamine and 2-methyl-1,8octanediamine, the molar ratio between said 1,9 nonanediamine and said 2-methyl-1,8-octanediamine being in a range of 60:40 to 99:1, measurement in concentrated sulfuric acid at 30.degree. C. of 0.4 to 3.0 dl/g. These polyamides have excellent moldability, as well as excellent hot water resistance, surface neatness, heat resistance, mechanical characteristics, low-water-absorption property and chemical resistance. Polyamide compositions comprising the 9-T polyamide or 9M-T polyamide and a filler are suitably used as engineering plastics.
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Hayashihara Hiroshi
Kashimura Tsugunori
Oka Hideaki
Yokota Shin-ichi
Hampton-Hightower P.
Kuraray Co. Ltd.
Seidleck James J.
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