Siloxane-containing pullulan and method for the preparation thereof
US5583244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1995 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Nov 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/42
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a novel organosilicon-containing derivative of pullulan of which an organopolysiloxane moiety having a silethylene linkage is bonded to the glucose residue of pullulan through a urethane linkage. Different from conventional organopolysiloxane-modified pullulans, the inventive derivative is stable against attack of water and exhibits unique properties as a combination of the properties inherent in pullulan and in silicones. The organosilicon-containing pullulan of the invention can be easily prepared under mild reaction conditions by reacting an isocyanato group-containing organopolysiloxane with the glucosic hydroxy groups of pullulan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.