US4312675A
Expired / Lapsed
US
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High concentration polymer slurries
Assignee: CP Kelco US Inc
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Filing: 1980-04-21
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Granted: 1982-01-26
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Expires: 2000-04-21
Abstract
Abstract High concentration polymer slurries contain up to 65 weight % xanthan gum in a hydrophobic solvent base treated with suspending agents, dispersants, and thinning agents. Mineral oil, diesel oil, kerosene, alcohols (six to twelve carbons), vegetable oil, ester-alcohols, polyol ethers, and the like may be used as the solvent. The preferred suspending agent is either an organophilic clay or hydroxypropyl cellulose. The preferred dispersant is either an ethoxylated linear alcohol or a fatty acid ester of vegetable oil or animal oil. The preferred thinning agent is lecithin. These slurries greatly improve the dispersibility of xanthan gum or any other hydrophilic colloid, such as guar, hydroxypropyl guar, cellulosics, polyacrylamides, and the like.
Inventors
- 👤 Patrick A. Pickens
- 👤 Thomas A. Lindroth
- 👤 Robert D. Carico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:14
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C08; C08L; C08L5/00; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
128 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; and optionally, 0.5-1 weight % thinning agent; and, optionally, 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2+2 , C n H 2n , or C n H n+1 wherein n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils;
Claim 2
Dependent Claim
128 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; and optionally, 0.5-1 weight % thinning agent; and, optionally, 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2+2 , C n H 2n , or C n H n+1 wherein n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils;
Claim 3
Dependent Claim
44 words
mixtures of diesel oil or kerosene in about equal amounts with primary, secondary, and tertiary alcohols of 6-12 carbons; 5. turpentine; 6. glycol ethers; 7. glycols of formula weight greater than 1000; 8. 2,2,4-trimethylpentanediol-1,3-monoisobutyrite; 9. animal oils; 10. silicone oils; or 11. halogenated solvents.
Claim 4
Dependent Claim
44 words
mixtures of diesel oil or kerosene in about equal amounts with primary, secondary, and tertiary alcohols of 6-12 carbons; 5. turpentine; 6. glycol ethers; 7. glycols of formula weight greater than 1000; 8. 2,2,4-trimethylpentanediol-1,3-monoisobutyrite; 9. animal oils; 10. silicone oils; or 11. halogenated solvents.
Claim 5
Dependent Claim
55 words
A slurry of claim 1 wherein the aliphatics are diesel oil, kerosene, gasoline, mineral oil, or lubricating oil; the vegetable oils are peanut oil, linseed oil, corn oil, cotton oil, or tall oil; the glycol ethers are phenyl glycol ethers; the glycols are polypropylene glycol; and the animal oils are fish or beef fat oils.
Claim 6
Dependent Claim
16 words
The slurry of claim 1 in which xanthan gum is 200 mesh or finer, Tyler screen.
Claim 7
Dependent Claim
41 words
The slurry of claim 1 in which the solvent base is one or more of mineral oil, diesel oil, kerosene, mixtures of diesel oil or kerosene in about equal amounts with 6-12 carbon chain alcohols, vegetable oil, 2,2,4-trimethylpentanediol-1,3-monoisobutyrite, or glycol ethers.
Claim 8
Dependent Claim
16 words
The slurry of claim 1 in which the suspending agent is organophilic clay or hydroxypropyl cellulose.
Claim 9
Dependent Claim
15 words
The slurry of claim 1 in which the thinning agent is employed and is lecithin.
Claim 10
Dependent Claim
25 words
The slurry of claim 1 in which the dispersant is employed and is ethoxylated linear alcohols or fatty acid esters of vegetable or animal oils.
Claim 11
Dependent Claim
171 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; and optionally, 0.5-1 weight % thinning agent; and, optionally, 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2n+2 , C n H 2n , or C n H n+1 where n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils; 4. mixtures of diesel oil or kerosene in about equal amounts with primary, secondary, and tertiary alcohols of 6-12 carbons; 5. turpentine; 6. glycol ethers; 7. glycols of formula weight greater than 1000; 8. animal oils; 9. silicone oils; or 10. halogenated solvents.
Claim 12
Dependent Claim
171 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; and optionally, 0.5-1 weight % thinning agent; and, optionally, 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2n+2 , C n H 2n , or C n H n+1 where n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils; 4. mixtures of diesel oil or kerosene in about equal amounts with primary, secondary, and tertiary alcohols of 6-12 carbons; 5. turpentine; 6. glycol ethers; 7. glycols of formula weight greater than 1000; 8. animal oils; 9. silicone oils; or 10. halogenated solvents.
Claim 13
Dependent Claim
159 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; 0.5-1 weight % thinning agent; and 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2n+2 , C n H 2n , or C n H n+1 wherein n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils; 4. primary, secondary, and tertiary alcohols of 6-12 carbons; 5. turpentine; 6. glycol ethers; 7. glycols of formula weight greater than 1000; 8. 2,2,4-trimethylpentanediol-1,3-monoisobutyrite; 9. animal oils; 10. silicone oils; or 11. halogenated solvents.
Claim 14
Dependent Claim
159 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; 0.5-1 weight % thinning agent; and 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2n+2 , C n H 2n , or C n H n+1 wherein n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils; 4. primary, secondary, and tertiary alcohols of 6-12 carbons; 5. turpentine; 6. glycol ethers; 7. glycols of formula weight greater than 1000; 8. 2,2,4-trimethylpentanediol-1,3-monoisobutyrite; 9. animal oils; 10. silicone oils; or 11. halogenated solvents.
Claim 15
Dependent Claim
150 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; 0.5-1 weight % thinning agent; and 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2n+2 , C n H 2n , or C n H n+1 wherein n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils; 4. turpentine; 5. glycol ethers; 6. glycols of formula weight greater than 1000; 7. 2,2,4-trimethylpentanediol-1,3-monoisobutyrite; 8. animal oils; 9. silicone oils; or 10. halogenated solvents.
Claim 16
Dependent Claim
150 words
A high concentration polymer slurry comprising 20-65 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base which is insoluble in water, does not solvate or swell hydrophillic colloids, has a melting point of no more than 30° C., and has a vapor pressure at 20° C. of no more than 1 Torr; 0.05-0.25 weight % suspending agent; 0.5-1 weight % thinning agent; and 0.1-7.0 weight % dispersant, wherein said hydrophobic solvent base is one or more of: 1. aliphatics of the formulas C n H 2n+2 , C n H 2n , or C n H n+1 wherein n is 6 or greater and mixtures thereof; 2. mineral spirits, and mixtures of aliphatics, ketones, aldehydes, esters, ethers, glycols, and alcohols; 3. vegetable oils; 4. turpentine; 5. glycol ethers; 6. glycols of formula weight greater than 1000; 7. 2,2,4-trimethylpentanediol-1,3-monoisobutyrite; 8. animal oils; 9. silicone oils; or 10. halogenated solvents.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |