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US 11,542,343 B2Granted
Water-soluble and/or water-swellable hybrid polymer
AssigneeClariant International Ltd.
InventorsDirk Fischer, Katharina Berz, Gundula Starkulla
Life of this patent
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Abstract
A water-soluble and/or water-swellable hybrid polymer comprising: (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer selected from the group consisting of xanthan gum, carrageenan, guar gum, chitosan, alginate and combinations thereof; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising up to 100 mol-% repeating units according to Formula (1a): wherein components (i) and (ii) are polymerized by radical precipitation polymerization in a polar solvent.
Claims20
A water-soluble and/or water-swellable hybrid polymer comprising:
- from 40 wt.-% to 90 wt.-%, based on the weight of the hybrid polymer, water-soluble and/or water-swellable polysaccharide polymer, wherein the water-soluble and/or water-swellable polysaccharide polymer is selected from the group consisting of xanthan gum, carrageenan, guar gum, chitosan, alginate and combinations thereof;
- (ii) grafted to the polysaccharide polymer, from 10 wt.-% to 60 wt.-%, based on the weight of the hybrid polymer, synthetic polymer comprising at least 99 mol-%, based on the total number of repeating units of the synthetic polymer wherein an amount of crosslinking or branching units in the synthetic polymer is up to 1 mol-%, repeating units according to Formula (1):
- wherein
- R1 and R2 are independently hydrogen, methyl or ethyl;
- A is a linear or branched C1-C12-alkyl;
- and
- Q+ is NH4+, or an organic ammonium ion [NHR5R6R7]+ wherein each R5, R6, and R7 independently of one another is hydrogen, a linear or branched alkyl group having 1 to 22 carbon atoms, a linear or branched, singularly or multiply unsaturated alkenyl group having 2 to 22 carbon atoms, a C6-C22 alkylamidopropyl group, a linear mono-hydroxyalkyl group having 2 to 10 carbon atoms or a linear or branched dihydroxyalkyl group having 3 to 15 carbon atoms, and where at least one of the radicals R5, R6, and R7 is not hydrogen, or Q+ is Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ⅓ Al+++, ¼ Zr++++ or combinations thereof;
- wherein graft polymerization of the synthetic polymer onto the polysaccharide polymer is performed by graft radical precipitation polymerization in a polar solvent.
5 more elements
A water-soluble and/or water-swellable hybrid polymer comprising:
- (i) from 40 wt.-% to 90 wt.-%, based on the weight of the hybrid polymer, water-soluble and/or water-swellable polysaccharide polymer, wherein the water-soluble and/or water-swellable polysaccharide polymer is selected from the group consisting of xanthan gum, carrageenan, guar gum, chitosan, alginate and combinations thereof;
- (ii) grafted to the polysaccharide polymer, from 10 wt.-% to 60 wt.-%, based on the weight of the hybrid polymer, synthetic polymer comprising repeating units according to Formula (1):
- wherein
- R1 and R2 are independently hydrogen, methyl or ethyl;
- A is a linear or branched C1-C12-alkyl;
- and
- Q+ is NH4+, or an organic ammonium ion [NHR5R6R7]+ wherein each R5, R6, and R7 independently of one another is hydrogen, a linear or branched alkyl group having 1 to 22 carbon atoms, a linear or branched, singularly or multiply unsaturated alkenyl group having 2 to 22 carbon atoms, a C6-C22 alkylamidopropyl group, a linear mono-hydroxyalkyl group having 2 to 10 carbon atoms or a linear or branched dihydroxyalkyl group having 3 to 15 carbon atoms, and where at least one of the radicals R5, R6, and R7 is not hydrogen, or Q+ is Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ⅓ Al+++, ¼ Zr++++ or combinations thereof;
- wherein graft polymerization of the synthetic polymer onto the polysaccharide polymer is performed by graft radical precipitation polymerization in a polar solvent, and wherein the synthetic polymer lacks crosslinking structural units.
5 more elements
Dependencies are inferred from the claim text.