Hydroxypropyl methyl cellulose thickening agents for organic liquids
AssigneeThe Dow Chemical Company
InventorRoland H. P. Hess
Life of this patent
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Abstract
Hydroxypropyl cellulose ethers which have a methoxyl substitution of from 21% to 35% and a hydroxypropoxyl substitution of from 14% to 35% and which have a viscosity of at least about 50 mPa.multidot.s as a 2 weight percent aqueous solution are useful as thickening agents for organic liquids, optionally mixed with water.
Claims13
A method for thickening an organic liquid or a mixture thereof with water by adding a thickening amount of a hydroxypropyl methyl cellulose ether which has a methoxyl substitution of from 21% to 35%, a hydroxypropoxyl substitution of from 18% to 35% and a sum of the methoxyl and hydroxypropoxyl substitution of from 39% to 70% and which has a viscosity of at least about 1,000 mPa.multidot.s as a 2 weight percent aqueous solution at 20.degree. C.
A thickened organic liquid or a thickened mixture thereof with water characterised in that it contains a thickening amount of hydroxypropyl methyl cellulose ether which has a methoxyl substitution of from 21% to 35%, a hydroxypropoxyl substitution of from 18% to 35% and a sum of the methoxyl and hydroxypropoxyl substitution of from 39% to 70% and which cellulose ether has a viscosity of at least about 1,000 mPa.multidot.s as a 2 weight percent aqueous solution at 20.degree. C.
A hydroxypropyl methyl cellulose ether which has a methoxyl substitution of from 21% to 35%, a hydropropoxyl substitution of from 18% to 35% and a sum of the methoxyl and hydroxypropoxyl substitution of from 39% to 70% and which has a viscosity of at least about 1,000 mPa.multidot.s as a 2 weight percent aqueous solution at 20.degree. C. for use as a thickening agent for an organic liquid or a mixture thereof with water.
Dependencies are inferred from the claim text.