High molecular weight polyethersulfones

Details High molecular weight polyethersulfones High molecular weight polyethersulfones

1978-05-17

1979-05-22

Hoke, V. P.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C08G 7523

Patent

active

041560680

ABSTRACT:
High molecular weight polyether-sulfones are prepared by reacting a 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenyl with 4,4'-dihalodiphenyl sulfone and from about 0 to 30 percent stoichiometric excess of an alkali metal carbonate or bicarbonate compound in the presence of a dipolar aprotic solvent. The polyethersulfone polymers and products made therefrom possess low density and high glass transition temperatures while maintaining good solvent resistance and good tensile, flexural, and hardness properties.

REFERENCES:
patent: 4009149 (1977-02-01), King et al.
ACS Publication: Advances in Chemistry, Series 91, pp. 692 to 702 (1969), Schulze et al.
ACS Polymer Preprints 16, pp. 476 to 481 (1975), Robeson et al.
New Linear Polymers, Lee et al., pp. 101 to 127 (1967).

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