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US 10,947,322 B2Granted
Esterified cellulose ethers comprising phthalyl groups
AssigneeNutrition & Biosciences USA 1, LLC
InventorOliver Petermann
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Abstract
An esterified cellulose ether is provided wherein the ester groups are phthalyl groups, the degree of substitution of phthalyl groups is from 0.02 to 0.18, the degree of neutralization of phthalyl groups is not more than 0.75, and the esterified cellulose ether has a solubility in water of at least 2.0 weight percent at 2° C.
Claims20
A hydroxypropyl methyl cellulose phthalate, wherein
- the degree of substitution of phthalyl groups is from 0.02 to 0.18, the degree of neutralization of phthalyl groups is not more than 0.75, wherein the degree of neutralization=[—C(O)—C6H4—COO−]/[—C(O)—C6H4—COO−+—C(O)—C6H4—COOH], and
- the hydroxypropyl methyl cellulose phthalate has a solubility in water of at least 2.0 weight percent at 2° C.
Dependencies are inferred from the claim text.