Homogeneous, flexible block copolyetheramide having oxyalkylene

Details Homogeneous, flexible block copolyetheramide having oxyalkylene Homogeneous, flexible block copolyetheramide having oxyalkylene

1986-03-28

1988-04-26

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

5254205, 525432, 528336, 528338, 528339, 528340, C08G 6934

Patent

active

047405821

ABSTRACT:
Novel, homogeneous and flexible block copolyetheramides, having a melting point of at least 150.degree. C., a glass transition temperature not exceeding -5.degree. C. and a melt viscosity of at least 100 poises, are preferably prepared by prepolymerizing a mixture of a salt of a short-chain aliphatic dicarboxylic acid and a short-chain aliphatic diamine with a fatty acid(s) dimer or amino derivative thereof, and then polycondensing the prepolymer in the presence of a strong organic or inorganic oxyacid, with a polyoxyalkylenediamine or a polyoxyalkylenedicarboxylic acid having a number-average molecular weight ranging from 300 to 1200.

REFERENCES:
patent: 3499853 (1970-03-01), Griebsch et al.
patent: 4062820 (1977-12-01), Mitchell, III et al.
patent: 4218351 (1980-08-01), Rasmussen
patent: 4356300 (1982-10-01), Isler et al.
patent: 4452974 (1984-06-01), Goletto et al.

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