Liquid-absorbent polymer and gelatinoid product
US5886124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1998 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | May 5, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F251/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are a liquid-absorbent polymer and a substantially clear gelatinoid product. The liquid absorbent polymer comprises a saponified graft copolymer of starch and a polynitrile species, such as polyacrylonitrile. In accordance with the disclosed invention, the liquid-absorbent polymer is prepared from a derivatized starch, the derivatized starch having a degree of substitution sufficient to substantially inhibit starch-starch interactions in the gelatinoid product formed upon mixing of the polymer with liquid. Preferred starches have a degree of substitution (DS) of at least about 0.01. Upon saponification of the liquid-absorbent polymer and placing of the polymer into absorbent contact with a liquid, a gelatinoid product will be formed. The gelatinoid product thus formed will have a substantially homogeneous index of refraction, and thus will be substantially clear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.