Polyformal resin and process for producing said resin

Details Polyformal resin and process for producing said resin Polyformal resin and process for producing said resin

1988-01-20

1989-01-31

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528397, C08G 6540

Patent

active

048016799

ABSTRACT:
Polyformal resins having a repeating unit represented by the general formula: ##STR1## wherein the symbols are as defined in the appended claims and an intrinsic viscosity at 20.degree. C. as a methylene chloride solution of at least 0.2 dl/g, and a process for efficiently producing the polyformal resins. The present polyformal resins are excellent in heat resistance and optical properties, and thus are useful as materials for production of optical instruments, for example.

REFERENCES:
patent: 4260733 (1981-04-01), Loucks et al.

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