Biodegradable compositions for controlled release of chemical agents
US5110868A · kind A · utility
9Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1991 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Jan 14, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3715
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.