Stabilizer Composition of Microcrystalline Cellulose and Carboxymethylcellulose, Method for Making, and Uses
AssigneeFMC Corporation
InventorsZheng Tan, Maurice Gerard Lynch, Michael Sestrick, Nadia Yaranossian
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Abstract
The subject matter of this invention is a composition and method of making a water-dispersible, stabilizing colloidal microcrystalline cellulose:xarboxymethylcellulose composition. The method of making the composition does not require a salt solution as an anti-slip agent.
Claims17
A process for a making a stabilizer composition comprising:
- a) blending a microcrystalline cellulose wetcake with a first carboxymethyl cellulose having a DS of 0.45-0.85 in an amount of 5% to 25% by weight of the total composition;
- b) extruding the product of step a);
- c) either
- i) blending and subsequently extruding a second carboxymethyl cellulose having a DS of 0.9-1.5 in an amount of 2% to 20% by weight of the total composition, into the product of step b);
- or
- ii) preparing a water dispersion comprising the microcrystalline cellulose:carboxymethylcellulose extrudate of step b) and a second carboxymethyl cellulose having a DS of 0.9-1.5, wherein the second carboxymethyl cellulose is present in an amount of 2% to 20% by weight of the total composition;
- and
- d) drying the product of step c).
A stabilizer composition comprising
- a) microcrystalline cellulose, and
- b) a mixture of a first carboxymethyl cellulose having a DS of 0.45-0.85 in an amount of 5% to 25% by weight of the total composition and a second carboxymethyl cellulose having a DS of 0.9-1.5 in an amount of 2%-20% by weight of the total composition, wherein the stabilizer composition has an initial viscosity of at least 750 cps, a set-up viscosity of at least 3200 cps, and a set-up gel strength G′ of at least 20 Pa when dispersed in water at 2.6% solids concentration.
A stabilizer composition comprising
- a) microcrystalline cellulose;
- and
- b) a mixture of
- i. a first carboxymethyl cellulose having a DS of 0.45-0.85 in an amount of 5%-25% by weight of the composition, and
- ii. a second carboxymethyl cellulose having a DS of 0.9-1.0,
- wherein the composition is made by the following sequential process steps:
- 1. co-extruding a microcrystalline cellulose wetcake with a first carboxymethyl cellulose having a DS of 0.45-0.85 for sufficient attrition and interaction;
- 2. either
- i) blending a second carboxymethyl cellulose having a DS of 0.9-1.0 into the product of step 1, followed by extruding;
- or
- ii) preparing a water dispersion comprising the microcrystalline cellulose:carboxymethyl cellulose extrudate of step 1 and a second carboxymethyl cellulose having a DS of 0.9-1.0;
- and
- 3. drying the product of step 2.
A stabilizer composition comprising
- a) microcrystalline cellulose;
- b) a carboxymethyl cellulose having a DS of 0.45-0.85 in an amount of 5%-25% by weight of the composition;
- and
- c) at least one additional hydrocolloid in an amount of 5%-50% by weight of the composition;
- wherein the composition is made by the following sequential process steps:
- i. co-extruding a microcrystalline cellulose wetcake with a carboxymethyl cellulose having a DS of 0.45-0.85 in an amount of 5%-25% by weight of the composition for sufficient attrition and interaction;
- ii. either
- (a) preparing a water dispersion comprising the microcrystalline cellulose:carboxymethyl cellulose extrudate of step i and at least one additional hydrocolloid;
- or
- (b) blending in at least one additional hydrocolloid to the product of step i., then extruding the admixture;
- and
- iii. drying the product of step ii.
An industrial suspension comprising a composition comprising microcrystalline cellulose, a first water-soluble carboxymethylcellulose having a degree of substitution of about 0.45 to about 0.85, and a second water-soluble carboxymethylcellulose having a degree of substitution of about 0.9 to about 1.5,wherein the weight ratio of the microcrystalline cellulose and the carboxymethyl cellulose is from about 95:5 to about 70:30, wherein upon dispersion in water at 2.6% solids the stabilizer composition has an initial viscosity of at least 750 cps, a set-up viscosity of at least 3200 cps, and a set-up gel strength G′ of at least 20 Pa, and wherein the stabilizing suspension is adapted for use in a pharmaceutical product, a nutraceutical product, a cosmetic product, a personal care product, a consumer product, a agricultural product, or a chemical formulation.
Dependencies are inferred from the claim text.