Polyaspartic acid as a calcium carbonate and a calcium phosphate inhibitor
US5152902A · kind A · utility
54Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Mar 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C237/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
.beta.-Polyaspartic acid having a weight average molecular weight of 1000 to 5000 produced by hydrolysis of anhydropolyaspartic acid, exhibits a high degree of calcium carbonate and calcium phosphate inhibition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.