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US 5,702,644 AGranted
Pitch control composition
AssigneeAshland Inc.
InventorsLinda M. Hlivka, George K. Wai
Life of this patent
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Abstract
This invention relates to a liquid composition for the control of pitch deposition in acid pulp and paper making operations comprising a derivatized cationic guar and an alkali metal polyacrylate dispersant. The invention also relates to a process for inhibiting pitch deposition on paper making equipment.
Claims4
A liquid composition for the control of pitch deposition in acid pulp and paper making comprising in aqueous solution:
- (a) a derivatized cationic guar having a hydroxypropyl trimonium group wherein the charge density of the derivatized cationic guar is from 0.01 meq/g to 3.0 meq/g.;
- and
- (b) an alkali metal polyacrylate dispersant wherein the average molecular weight of the sodium polymethacrylate dispersant is from 10,000 to 50,000,
- where the amount of derivatized cationic guar in the composition is from 1-20% by weight based upon the weight of the stabilized aqueous solution and the amount of alkali metal polyacrylate in the composition is from 1-20% by weight based upon the weight of the stabilized aqueous solution.
1 more element
Dependencies are inferred from the claim text.