Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1980-08-25
1982-09-14
Morris, Theodore
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525296, 525419, 528292, 528318, C08G 6941, C08G 6342
Patent
active
043496610
ABSTRACT:
The process for preparing thermoplastic polyether amides or polyether ester amides from lactams, dicarboxylic acids and polyethers having hydroxyl end groups and amino end groups or polyethers having amine end groups is improved.
First, a mixture of lactams having at least 8 C atoms with dicarboxylic acids is melted in a molar ratio of 100/7 to 100/120 at temperatures of 230.degree. to 300.degree. C. while being mechanically mixed, in an inert gas atmosphere at ordinary pressure and in the absence of water, until the lactams have been reacted to at least 99%. Then, the polyether bearing the hydroxyl end groups and/or the amino end groups is added in a molar ratio of 1/0.95 to 1/1.05, based on the amount of dicarboxylic acid contained in the molten mixture. Homogenizing is then carried out with further mixing at 230.degree. to 290.degree. C. Lastly, a polycondensation is carried out to completion at 250.degree. to 290.degree. C.
REFERENCES:
patent: 2401607 (1946-06-01), Bruson
patent: 3428710 (1969-02-01), Daumiller et al.
patent: 3489816 (1970-01-01), Hornig et al.
patent: 3838076 (1974-09-01), Moss et al.
patent: 3847992 (1974-11-01), Moss
patent: 3944629 (1976-03-01), Hendrick
patent: 3993709 (1976-11-01), Hendrick et al.
patent: 4182843 (1980-01-01), Haupt et al.
patent: 4207410 (1980-06-01), Burzin et al.
patent: 4252920 (1981-02-01), Deleens et al.
"Encyclopedia of Chemical Technology" Kirk-Othmer 2nd Ed., vol. 16, pp. 88-105, 1969.
Chemische Werke Huls AG
Morris Theodore
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