Copolymers of acetal carboxylates

Details Copolymers of acetal carboxylates Copolymers of acetal carboxylates

1978-11-20

1980-05-20

Nielsen, Earl A.

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

Synthetic resins

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

252 891, 2603457R, 2603458R, 528232, 528239, 528243, 528270, 560180, 560182, 562583, 525509, C08G 214, C08G 230, C08L 5902

Patent

active

042040523

ABSTRACT:
Copolymers of acetal carboxylates are provided which have the following empirical formula ##STR1## where Y is one or more comonomers randomly distributed in the copolymer; the product of n and q averages at least 4; p is at least 1; and M is selected from the group consisting of alkali metal, ammonium, alkyl groups having 1 to about 4 carbon atoms, and alkanol ammonium groups having 1 to about 4 carbon atoms in the alkyl chain. Such copolymers are useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations. The copolymers are stable under laundry use conditions, but depolymerize in acid media, making the fragments more readily biodegradable in waste streams.

REFERENCES:
patent: 3704320 (1972-11-01), Lannert
patent: 3706672 (1972-12-01), Martin et al.
patent: 3725290 (1973-04-01), Nelson et al.
patent: 3781349 (1973-12-01), Ramsey et al.
patent: 3970698 (1976-07-01), Lannert
patent: 4144226 (1979-03-01), Crutchfield et al.

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