Selectively controlling the hydrolytic stability of acetal carbo

Details Selectively controlling the hydrolytic stability of acetal carbo Selectively controlling the hydrolytic stability of acetal carbo

1980-06-05

1981-11-24

Phynes, Lucille M.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525400, 525403, 528232, 528239, 528243, 528245, 528270, C08G 600, G08L 6102

Patent

active

043025641

ABSTRACT:
The alkali metal, ammonium and alkanol amine salts of acetal carboxylate polymers are known to be stable detergent builders and chelating agents which depolymerize in acid media making the polymer fragments more readily biodegradable in waste streams. Now, according to the present invention, the hydrolytic stability of an acetal carboxylate polymer can be controlled by bringing together under polymerization conditions an ester of glyoxylic acid and a polymerization initiator and adding to the termini of the resulting polymer end groups having substituents which are selected to be more electron withdrawing as the desired hydrolytic stability increases.

REFERENCES:
patent: 4144226 (1979-03-01), Crutchfield et al.
patent: 4204052 (1980-05-01), Crutchfield et al.

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