Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1981-04-20
1982-05-04
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525425, 525444, 528291, 528292, C08G 6344
Patent
active
043283314
ABSTRACT:
Segmented thermoplastic polyester-amides are described which are prepared by reacting a polymeric diol (molecular weight in the range of 400 to 4000) with a carboxylic acid terminated prepolymer obtained by reacting an aliphatic ether diamine, optionally in admixture with a minor proportion (based on equivalents) of an alkylene diamine, with an excess of dicarboxylic acid (aromatic or aliphatic). The polyester-amides, which can be prepared preferably by the melt condensation method, have excellent physical properties and resistance to degradation by heat.
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Chen Augustin T.
Nelb, II Robert G.
Onder Kemal B.
Firth Denis A.
Kekich John
Phynes Lucille M.
The Upjohn Company
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