ALKALINE DETERGENT COMPOSITION CONTAINING A CARBOXYLIC ACID TERPOLYMER FOR HARD WATER SCALE CONTROL

摘要

A highly alkaline detergent is described which includes the use of a carboxylic acid terpolymer in combination with an alkali metal hydroxide. The detergent maintains cleaning functions and also prevents hard water scaling at application temperatures, for example at temperatures of between about 145-180 degrees Fahrenheit and, for example, at a pH of 9.5 to about 13.

主权项

1: An alkaline cleaning solution comprising:
from about 1 to about 1500 ppm of an alkali metal hydroxide; and from about 5 to about 500 ppm of a carboxylic acid terpolymer comprising in copolymerized form from about 30 to 90% by weight of at least one monoethylenically unsaturated C3-C8-carboxylic acid, or an anhydride or salt thereof, from about 3 to 60% by weight of at least one monomer comprising a sulfo group, and from about 3 to 20% by weight of at least one nonionic monomer of the formula I
H2C═C(R1)(CH2)xO[R2—O]y—R3  (I) in which R1 is hydrogen or methyl, R2 are identical or different, linear or branched C2-C6-alkylene wherein R2—O may be arranged in blocks or randomly, and R3 is hydrogen or a straight-chain or branched C1-C4-alkyl, x is 0, 1 or 2 and y is a number from 3 to 50.