Process for preparing polymeric acetal carboxylate salts

Details Process for preparing polymeric acetal carboxylate salts Process for preparing polymeric acetal carboxylate salts

1978-03-02

1979-02-20

Phynes, Lucille M.

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

Synthetic resins

From aldehyde or derivative thereof as reactant

528489, 528239, 528270, 562518, 562537, C08G 230

Patent

active

041406761

ABSTRACT:
Alkali metal salts of polymeric acetal carboxylate are stable detergent builders under laundry use conditions but depolymerize in acid media, making the polymer fragments more readily biodegradable in waste streams. According to the improved process of the present invention, an ester of a polymeric acetal carboxylate is brought together in a reaction zone with a sufficient amount of an alkali metal base having a normality of at least 5 normal, and preferably at least 10 normal, to saponify at least 50 percent of the ester groups. In the preferred embodiment, the ester is contacted with a solvent to remove color-producing impurities.

REFERENCES:
patent: 3214410 (1965-10-01), Koral
patent: 3215675 (1965-11-01), Koral
patent: 3704320 (1972-11-01), Lannert
patent: 3825498 (1974-07-01), Altenschopfer et al.
Achmatowicz et al., Chemii Ann. Soc. Chim. Polonorum, 42(1968) pp. 453 and 456.

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