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Copolyetheramides IN CAPITAL STRUCTURE FOR TECHNICAL USE WITH GOOD FLEXIBILITY AT LOW TEMPERATURE AND WITH A VISCOSITY IN MOLTEN STATE OF AT LEAST 50 PA XS
Copolyetheramides IN CAPITAL STRUCTURE FOR TECHNICAL USE WITH GOOD FLEXIBILITY AT LOW TEMPERATURE AND WITH A VISCOSITY IN MOLTEN STATE OF AT LEAST 50 PA XS
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机译：技术用途的资本结构中的共聚醚酰胺，具有良好的低温柔韧性和至少50 PA XS的流动态粘度
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摘要
Novel block copolyetheramides which are homogeneous and flexible at low temperatures and have melting or softening points of at least 170 DEG C., glass transition temperatures of at most -5 DEG 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.
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