Personal care product including a derivatized polymer of maleic anhydride alkyl half-ester or full acid, maleamic acid and maleimide units
US5994385A · kind A · utility
3Cited by
5References
8Claims
0Family size
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Key dates
| Filing date | Nov 13, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for making derivatized polymers of maleic anhydride containing maleamic acid and its corresponding cyclic imide repeat units, in alcohol solution, at a temperature of about 60-160.degree. C., during a reaction period of about 1-25 hours. The product is a polymer having a predetermined ratio of the above repeat units. The polymers are included in personal care poducts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.