Particulate polyacetal carboxylate and methods for preparation t

Details Particulate polyacetal carboxylate and methods for preparation t Particulate polyacetal carboxylate and methods for preparation t

1988-02-08

1989-06-13

Welsh, Maurice J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

427220, 427221, 528230, 528238, 528239, C08L 5900

Patent

active

048394076

ABSTRACT:
A method for preparation of solid particulate polyacetal carboxylate. The method comprises agglomerating a solution comprising less than about 1% by weight methanol and between about 30% by weight and about 60% by weight polyacetal carboxylate onto a substrate to produce a free-flowing particulate solid. The solid comprises between about 30% by weight and about 55% by weight polyacetal carboxylate. The polyacetal carboxylate corresponds to the formula: ##STR1## where n is at least about 4 and represents the average chain length of the polyacetal carboxylate in the mixture, R.sub.1 and R.sub.2 are independently selected chemically stable groups that stabilize the polymer against rapid depolymerization in alkaline solution, and M is selected from the group consisting of alkali metals, ammonium, alkyl groups of 1 to about 4 carbon atoms, tetraalkyl ammonium groups, and alkanolamine groups having from 1 to about 4 carbon atoms in the alkyl chain.

REFERENCES:
patent: 4140676 (1979-02-01), Crutchfield et al.
patent: 4144226 (1979-03-01), Crutchfield et al.

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