Preparation of hexamethylenediamine/adipic acid/dimer acid copol

Details Preparation of hexamethylenediamine/adipic acid/dimer acid copol Preparation of hexamethylenediamine/adipic acid/dimer acid copol

1982-09-24

1984-06-05

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528336, 5283395, C08G 6934

Patent

active

044529740

ABSTRACT:
Flexible, homogeneous and transparent copolyamides comprise the polycondensation products of adipic acid, fatty acid dimer and hexamethylenediamine, the molar ratio of weight adipic acid to weight of total acid in each ranging from about 0.5 to 0.99, and that point obtained by plotting, along the abscissa, such molar fraction of adipic acid versus, along the ordinate, any individual copolyamide melting point, falling within that area A B C D outlined on the attached Figure of Drawing. The subject copolyamides are prepared either by polycondensing a homogenized prepolymer thereof, or by directly copolycondensing a homogeneous, inert solvent solution of monomers. The homogeneous and transparent copolyamides exhibit improved flexibility and high tenacity coupled with good resistance to hydrolysis and good heat resistance, with the copolyamides being useful for providing shaped articles such as moldings, films or filaments of marked uniformity via injection molding, extrusion or spinning.

REFERENCES:
patent: 2149286 (1939-03-01), Graves
patent: 3499853 (1970-03-01), Griebsch et al.
English Language Translation Japanese Patent Application Publication No. 520/1972.
English Language Translation Japanese Patent Application Public Disclosure No. 117,999/1977.

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