Biodegradable absorbent material and method of manufacture
US8507607B2 · kind B2 · utility
5Cited by
2References
26Claims
0Family size
Inventor
Key dates
| Filing date | Jun 9, 2010 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Jul 3, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Biodegradable graft copolymers derived from a carbohydrate and at least one α,β-unsaturated carboxylic acid derivative having superabsorbent properties are disclosed in addition to the substantially adiabatic polymerization process by which the graft copolymers are made. The methods disclosed can be carried out in a variety of currently available continuous commercial reactors. Polymerizations carried out with starch have surprisingly produced substantially quantitative yields of graft copolymer free of residual monomer produced as a moist copolymer. Product work-up typically involves an optional neutralization and drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.