Thermoplastic polyester polyurethanes

Details Thermoplastic polyester polyurethanes Thermoplastic polyester polyurethanes

1980-09-25

1981-12-15

Cockeram, H. S.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 51, 528 53, 528 55, 528 56, 528 58, 528 73, C08G 1877, C08G 1842

Patent

active

043060528

ABSTRACT:
Novel thermoplastic polyester polyurethanes are disclosed which are obtained by reacting a polyester diol, a difunctional extender, a methylenebis(phenyl isocyanate), and from about 0.0025 mole to about 0.03 mole per equivalent of isocyanate of a monocarbodiimide product derived from a methylenebis(phenyl isocyanate) or the corresponding uretidinedioneimine adduct thereof with said latter methylenebis(phenyl isocyanate).
The polyester polyurethanes are characterized by a combination of thermoplasticity, extremely good hydrolytic stability which cannot be diminished by solvent action, good physical properties, particularly tensile strength and elongation, and enhanced clarity of molded articles.

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