Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1980-06-24
1983-05-17
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528336, C08G 6926
Patent
active
043841112
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.
Coquard Jean
Goletto Jean
Anderson Harold D.
Rhone-Poulenc Industries
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