Compositions having increased concentrations of carboxymethylcellulose
First Claim
Patent Images
1. A method for increasing the concentration of a CMC stock solution comprising:
- dissolving a CMC mixture in water to obtain an alkali solution of CMC, the CMC mixture comprising a dry-blend of a CMC, having a degree of substitution of less than about 0.9, and an alkali salt,wherein the alkali solution of CMC comprises the CMC in a concentration greater than about 9.8% by weight, and has a pH from about 7.5 to about 11, andwherein the alkali solution of CMC has a viscosity of less than about 5,000 mPa when measured at a temperature from about 50°
C. to about 60°
C.
2 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the present description provide methods for increasing the concentration of carboxymethylcellulose alkali solutions that are particularly suitable for use in a high solids paper coating, barrier materials, etc. Generally described, the method includes dissolving carboxymethylcellulose (CMC) and an alkali salt in water to obtain an alkali solution of CMC. The CMC desirably has a degree of substitution less than about 0.9. The alkali solution of CMC includes CMC in a concentration greater than about 9.8% by weight, has a pH from about 7.5 to about 11, and is characterized as having a viscosity of less than about 5,000 mPa.
-
Citations
20 Claims
-
1. A method for increasing the concentration of a CMC stock solution comprising:
-
dissolving a CMC mixture in water to obtain an alkali solution of CMC, the CMC mixture comprising a dry-blend of a CMC, having a degree of substitution of less than about 0.9, and an alkali salt, wherein the alkali solution of CMC comprises the CMC in a concentration greater than about 9.8% by weight, and has a pH from about 7.5 to about 11, and wherein the alkali solution of CMC has a viscosity of less than about 5,000 mPa when measured at a temperature from about 50°
C. to about 60°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification