Claims
- 1. A liquid composition for the control of pitch deposition in pulp and paper making comprising in aqueous solution:
- (a) a derivatized cationic guar, and
- (b) a styrene maleic anhydride copolymer having an average molecular weight of from 500 to 10,000.
- 2. The pitch control composition of claim 1 wherein the styrene maleic anhydride copolymer has an average molecular weight of from 200 to 4,000.
- 3. The pitch control composition of claim 2 wherein the derivatized cationic guar is hydroxypropyl trimonium chloride.
- 4. The pitch control composition claim 3 wherein the derivatized cationic guar has a charge density of 0.01 meq/g to 3.0 meq/g.
- 5. The pitch control composition of claim 4 wherein the weight ratio of (a) derivatized cationic guar to (b) styrene maleic anhydride copolymer is from 5:1 to 1:5.
REFERENCE TO PARENT APPLICATION
This application is a division of Ser. No. 08/692,829, filed Jul. 30, 1996 and now U.S. Pat. No. 5,744,003.
US Referenced Citations (8)
Divisions (1)
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Number |
Date |
Country |
Parent |
692829 |
Jul 1996 |
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