- Document Number:
20240262987
- Appl. No:
18/261177
- Application Filed:
February 24, 2022
- نبذة مختصرة :
A composition contains a silylated polysaccharide, where the silylated polysaccharide is characterized by: (a) having linked fructose, galactose, anhydrogalactose, or glucose saccharide units provided that glycosidic linkages of glucose are alpha linkages and that the silylated polysaccharide is other than a silylated starch; and (b) on average 1 to 100 mole-percent of the hydroxyl groups on the polysaccharide have been silylated with a silyl group having the structure —SiR3 linked to the polysaccharide through a C—O—Si bond where each R is independently selected from hydrocarbyl radicals having from one to 12 carbon atoms, provided that on average at least one R per polysaccharide has a terminally unsaturated carbon-carbon double bond.
- Claim:
1. A composition comprising a silylated polysaccharide, where the silylated polysaccharide is characterized by: a. comprising linked fructose, galactose, anhydrogalactose, or glucose saccharide units provided that glycosidic linkages of glucose are alpha linkages and that the silylated polysaccharide is other than a silylated starch; and b. on average 1 to 100 mole-percent of the hydroxyl groups on the polysaccharide have been silylated with a silyl group having the structure —SiR3 linked to the polysaccharide through a C—O—Si bond where each R is independently selected from hydrocarbyl radicals having from one to 12 carbon atoms, provided that on average at least one R per polysaccharide has a terminally unsaturated carbon-carbon double bond.
- Claim:
2. The composition of claim 1, wherein the silylated polysaccharide is selected from a group consisting of silylated beta-cyclodextrin, silylated maltodextrin, silylated pullulan, silylated dextran, silylated trehalose, silylated sucrose, silylated lactose, silylated maltose, silylated inulin, and silylated agarose.
- Claim:
3. The composition of claim 1, wherein the silylated polysaccharide comprises on average 2 to 2000 saccharide units per molecule.
- Claim:
4. The composition of claim 1, wherein at least two R groups per silylated polysaccharide has a terminally unsaturated carbon-carbon double bond.
- Claim:
5. The composition of claim 1, wherein each R is selected from methyl and vinyl groups.
- Claim:
6. A method for preparing the silylated polysaccharide of claim 1, the method comprising the steps: a. providing a polysaccharide comprising fructose, galactose, anhydrogalactose, or glucose linked saccharide units provided that glycosidic linkages of glucose are alpha linkages and that the silylated polysaccharide is other than a silylated starch; and b. silylating on average 1 to 100 mole-percent of the hydroxyl groups on the polysaccharide by substituting the hydrogen atom of the hydroxyl group with a group having the formula: —SiR3 where R is independently selected from hydrocarbyl radicals having from one to 12 carbon atoms, provided that on average at least one R per polysaccharide is a terminal alkenyl group.
- Claim:
7. The method of claim 6, wherein the polysaccharide has an average degree of polymerization that is less than or equal to 8 and wherein silylation occurs in an absence of polar aprotic solvent.
- Claim:
8. The method of claim 6, wherein the silylation occurs by reacting the polysaccharide with 1,1,3,3-tetraalkyl-1,3 divinyldisilazane and optionally hexaalkyldisilazane.
- Claim:
9. The method of claim 6, wherein the polysaccharide is selected from a group consisting of beta-cyclodextrin, maltodextrin, pullulan, dextran, trehalose, sucrose, lactose, maltose, inulin, and agarose.
- Claim:
10. The method of claim 6, where each R is selected from methyl and vinyl groups.
- Current International Class:
08; 07; 07; 08; 08; 08; 08; 08; 08; 08; 08; 08; 08; 08
- الرقم المعرف:
edspap.20240262987
Processing Request
No Comments.