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.
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.