Aqueous treatment compositions and polymers for use therein
View Patent ↗Aqueous treatment composition for use as anti-scalant and dispersant. The composition includes a polymer containing low amounts of sulfonate that prove as effective in carbonate and phosphate inhibition as polymers containing much higher amounts of sulfonate.
1. A cleaning formulation comprising:
a scale inhibiting polymer having at least one carboxylic acid functionality selected from the group consisting of acrylic acid, maleic acid, itaconic acid and combinations thereof, at least one nonionic functionality selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, t-butyl (meth)acrylate, methyl (meth)acrylamide, ethyl (meth)acrylamide, t-butyl (meth)acrylamide, styrene, α-methyl styrene and combinations thereof, and at least one sulfonate functionality selected from the group consisting of sodium (meth)allylsulfonate, vinyl sulfonate, sodium phenyl (meth)allyl ether sulfonate, 2-acrylamido-methyl propane sulfonic acid and combinations thereof,
wherein the sulfonate functionality is equal to or less than about 2 mole % of the polymer;
the cleaning formulation further comprising about 2 to about 80% by weight builder(s), based on total weight of the formulation,
wherein the polymer is able to maintain a level of bleach in a high pH system.
2. The formulation of claim 1 wherein the at least one carboxylic functionality is present in an amount of about 45 mole % to about 98 mole %.
3. The formulation of claim 2 wherein the at least one carboxylic functionality is present in an amount of about 70 mole % to about 90 mole %.
4. The formulation of claim 1 wherein the at least one nonionic functionality is present in an amount of about 0 mole % to about 50 mole %.
5. The formulation of claim 4 wherein the at least one nonionic functionality is present in an amount of about 5 mole % to about 30 mole %.
6. The formulation of claim 1 wherein said cleaning formulation comprises an aqueous treatment composition which contains about 0.001 to about 25% by weight of the polymer.
7. The formulation of claim 6 wherein the aqueous treatment composition contains about 0.5 to about 5% by weight of the polymer.