Homogeneous block copolyetheramides flexible at low temperatures

Details Homogeneous block copolyetheramides flexible at low temperatures Homogeneous block copolyetheramides flexible at low temperatures

1984-06-28

1986-04-08

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528313, 528323, C08G 6914

Patent

active

045814406

ABSTRACT:
Novel block copolyetheramides which are homogeneous and flexible at low temperatures and have melting or softening points of at least 170.degree. C., glass transition temperatures of at most -5.degree. C. and viscosities in the molten state of at least 500 poises, are facilely prepared by copolymerizing (I) admixture of a lactam having from 4 to 12 carbon atoms with a solution of a salt of a fatty acid dimer and a polyoxyalkylenediamine in a solvent medium comprising (i) a mixture of water and an aliphatic alcohol having less than 5 carbon atoms, (ii) a water/alcohol/lactam mixture, (iii) a lactam in molten state or (iv) a water/lactam mixture wherein the lactam is water soluble, the stoichiometry of said salt being adjusted such that the pH thereof is within .+-.0.05 pH units of its equivalence point and (II) a minor amount of a strong inorganic oxyacid or a strong organic oxyacid other than a carboxylic acid.

REFERENCES:
patent: 4356300 (1982-10-01), Isler et al.

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