Blends of polypropylene polyglycol and phenolic glycol ethers and method of foam control using such blend

摘要

A blend comprising from 1 to 99 weight percent one or more polypropylene glycols wherein each polypropylene glycol has a weight average molecular weight of greater than or equal to 1000 grams/mole and from 1 to 99 weight percent one or more dipropylene glycol phenyl ethers and/or diethylene glycol phenyl ethers wherein the blend has a viscosity (ASTM D445, @ 25° C.) of less than or equal to 400 cSt and viscosity (ASTM D445, @ 40° C.) of less than or equal to 200 cSt, is provided. Processes using the blend in mining applications are also provided.

主权项

1. A blend consisting essentially of (a) from 33 to 67 weight percent of one or more polypropylene glycols, based on the total weight of the blend, wherein each polypropylene glycol has a weight average molecular weight of from 3000 to 5000 grams/mole, (b) from 33 to 67 weight percent of one or more dipropylene glycol phenyl ethers and/or one or more diethylene glycol phenyl ethers, based on the total weight of the blend, and (c) optionally up to 3 weight percent of water, based on the total weight of the blend, wherein the blend has a viscosity measured according to ASTM D445 at 25° C. of less than or equal to 400 cSt and viscosity measured according to ASTM D445 at 40° C. of less than or equal to 200 cSt, wherein the blend is non-flammable as having a flash point measured using the Cleveland open cup method of ASTM D 92 greater than or equal to 60.5° C. (141° F.).