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EP0016640A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Xanthan gum slurries

Assignee: Merck and Co Inc
•
Filing: 1980-03-19
•
Granted: —
•
Expires: 2000-03-19
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Abstract

Abstract High concentration polymer slurries contain up to 60 weight % to 75 weight % xanthan gum in a 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 aminal 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 EP
Data Source google_patents
Last Synchronized 2026-10-28 08:15
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C08; C08B; C08B37/00; C08L; C08L5/00; F; F02; F02B; F02B3/00; F02B3/06

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 35 words
A high concentration polymer slurry comprising 20-75 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base; 0.05-0.25 weight % suspending agent; optionally 0.5-1 weight % thinning agent and optionally 0.1-7.0 weight % dispersant.
Claim 2
Dependent Claim 35 words
A high concentration polymer slurry comprising 20-75 weight % of xanthan gum; 20-75 weight % hydrophobic solvent base; 0.05-0.25 weight % suspending agent; optionally 0.5-1 weight % thinning agent and optionally 0.1-7.0 weight % dispersant.
Claim 3
Dependent Claim 20 words
A slurry as claimed in Claim 1 in which the xanthan gum is of 200 mesk er finer, Tyler screen.
Claim 4
Dependent Claim 33 words
A slurry as claimed in Claim 1 or 2 in which the solvent base is one or more of mineral oil, diesel oil, kerosene, C 6-12 alcohols, vegetable oil, ester-alcohols and polyol ethers.
Claim 5
Dependent Claim 21 words
A slurry as claimed in Claim 1, 2 or 3 in which the suspending agent is organophilic clay or hydroxypropyl cellulose.
Claim 6
Dependent Claim 17 words
A slurry as claimed in any preceding claim in which lecithin is included as the thinning agent.
Claim 7
Dependent Claim 27 words
A slurry as claimed in any preceding claim in which ethoxylated linear alcohols or fatty acid esters or vegetable or animal oils are included as the dispersant.

References Cited (Backward Citations)

FR2243228A1 Cited
CH599275A5 Cited
CH599276A5 Cited
FR2362893A1 Cited

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