Process for preparing polyester elastomers

Details Process for preparing polyester elastomers Process for preparing polyester elastomers

1975-09-29

1977-06-21

Briggs, Sr., Wilbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 75P, C08G 8100, C08G 6304

Patent

active

040311651

ABSTRACT:
In a process for preparing a block copolyester elastomer having a softening point of at least 120.degree. C. by reacting an aromatic polyester (I) having a reduced viscosity of at least 0.4 and derived from an aromatic dicarboxylic acid or its ester-forming derivative as a main acid component with an aliphatic polyester (II) having a reduced viscosity of at least 0.4 and derived from an aliphatic dicarboxylic acid or an aliphatic hydroxycarboxylic acid or an ester-forming derivative of each of these acids in the molten state; the improvement wherein

REFERENCES:
patent: 3446778 (1969-05-01), Waller et al.
patent: 3483157 (1969-12-01), Smith et al.
patent: 3835089 (1974-09-01), Fox et al.

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