Biodegradable compositions for controlled release of chemical ag

Details Biodegradable compositions for controlled release of chemical ag Biodegradable compositions for controlled release of chemical ag

1991-01-14

1992-05-05

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

25217424, 252174, 25217421, 25217422, 252DIG2, C11D 1700, C11D 348

Patent

active

051108682

ABSTRACT:
Solid compositions comprising water degradable oligomers of hydroxyacetic acid and lactic acid having molecular weights of 800-4000 and containing 40-60 mole percent hydroxyacetic acid. The compositions are useful as controlled release agents for chemicals, especially as a toilet bowl cleaning component. Optional ingredients include dyes, fragrances, filler materials, surfactants, algicides, pest control agents, quaternary ammonium salts, and mixtures thereof.

REFERENCES:
patent: 4269723 (1981-05-01), Barford et al.
patent: 4772802 (1988-02-01), Hutchings et al.
patent: 4986353 (1991-01-01), Clark et al.

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