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US 2007/0185295 A1Published application
Aqueous treatment compositions and polymers for use therein
AssigneeAkzo Nobel N.V.
InventorsKlein Rodrigues, Adrian Zuberbuehler, Stuart Holt, Kevin Beairsto
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Abstract
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.
Claims27
An aqueous treatment composition comprising:
- a scale inhibiting polymer having at least one carboxylic acid functionality, at least one nonionic functionality, and at least one sulfonate functionality,
- wherein the sulfonate functionality is equal to or less than about 2 mole % of the polymer;
- the aqueous treatment composition further comprising about 2 to about 80% by weight builder(s), based on total weight of the composition.
An aqueous treatment composition comprising:
- a polymer useful in scale inhibition and as a dispersant having
- at least one structural unit derived from at least one carboxylic monomer having the general formula (I)—
- wherein R1 to R4 are independently hydrogen, methyl, carboxylic acid group, or CH2COOH, wherein the carboxylic acid groups can be neutralized;
- at least one structural unit derived from at least one nonionic monomer having the general formula (II)—
- wherein R5 is hydrogen, C1 to C6 alkyl, or C1 to C6 hydroxyalkyl, and X is either aromatic with R5 being hydrogen or methyl when X is aromatic, or X is the general formula (III)—
- wherein R6 is, independently of R5, hydrogen, C1 to C6 alkyl, or C1 to C6 hydroxyalkyl;
- and Y is O or N;
- and at least one structural unit derived from at least one sulfonate monomer having the general formula—
- wherein R7 is a group comprising at least one sp2 bond, A is O, N, P, S or an amido or ester linkage, B is a mono- or polycyclic aromatic group or an aliphatic group, each t is independently 0 or 1, and C+ is a cation, and
- wherein the sulfonate monomer is present in the polymer in an amount of less than about 4 mole % except when X is aromatic,
- the aqueous treatment composition further comprising about 2 to about 80% by weight builder(s), based on total weight of the composition.
8 more elements
Dependencies are inferred from the claim text.