Block copolyetheramides flexible at low temperatures

Details Block copolyetheramides flexible at low temperatures Block copolyetheramides flexible at low temperatures

1985-12-11

1988-01-05

Ivy, C. Warren

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

Synthetic resins

From carboxylic acid or derivative thereof

528313, 528317, C08G 6914

Patent

active

047177632

ABSTRACT:
Homogeneous, flexible block copolyetheramides having a melting/softening point of at least 170.degree. C., a glass transition temperature, measured at ZHE, of at most -5.degree. C., and a melt viscosity of at least 500 poises, said block copolyetheramides comprising the oxyacid, or alkali or alkaline earth metal, such oxyacid salt catalyzed polycondensate of admixture of (i) a lactam having from 4 to 12 carbon atoms with (ii) a solution of (iii) a salt of a fatty acid dimer and a polyoxyalkylenediamine, or mixture thereof, with a triamine, in (iv) a solvent medium which comprises (1) a mixture of water and an aliphatic alcohol having less than 5 carbon atoms, (2) a water/alcohol/lactam mixture wherein the alcohol and lactam are as in (1), (3) a melt of said lactam, or (4) a mixture of water and a water-soluble such lactam, the stoichiometry of said salt (iii) having been carefully pre-adjusted such that the pH thereof is essentially that as exists at the equivalence point thereof, and said oxyacid comprising at least one acid function having a pKa of no greater than 4.

REFERENCES:
patent: 3240732 (1966-03-01), Ham
patent: 3397107 (1968-08-01), Kimura
patent: 4024116 (1977-05-01), Horn
patent: 4218351 (1980-08-01), Rasmussen
patent: 4356300 (1982-10-01), Isler
patent: 4581440 (1986-04-01), Coquard

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