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    • 10. 发明授权
    • Process for controlling pitch deposition from pulp in papermaking systems
    • 控制造纸系统中纸浆沥青沉积的工艺
    • US4871424A
    • 1989-10-03
    • US205566
    • 1988-06-07
    • David D. DreisbachGilbert S. Gomes
    • David D. DreisbachGilbert S. Gomes
    • D21C9/00D21C9/08
    • D21C9/008D21C9/086Y10S162/04
    • The invention relates to a process for controlling pitch deposition from pulp in papermaking systems which comprises adding to the pulp an effective amount of a polymer having hydroxyl groups pendant to the backbone of the polymer. The polymer can be polyvinyl alcohol having 50% to 100% hydrolysis. The polymer can also be a water-soluble copolymer having recurring units of nonionic hydrophilic monomers, and/or hydrophobic monomers, wherein the copolymer has at least 20 mol percent of vinyl alcohol. In another aspect, this invention comprises adding to the pulp an effective amount of a water-soluble polymer derived by substituting hydroxyl groups onto a preformed reactive polymer, wherein the water-soluble polymer has at least 20 mol percent of hydroxyl groups.
    • 本发明涉及一种用于控制造纸系统中纸浆的沥青沉积的方法,该方法包括向纸浆中加入有效量的聚合物,该聚合物具有垂直于聚合物主链的羟基。 聚合物可以是具有50%至100%水解的聚乙烯醇。 聚合物也可以是具有非离子亲水单体和/或疏水性单体的重复单元的水溶性共聚物,其中该共聚物具有至少20mol%的乙烯醇。 在另一方面,本发明包括向纸浆中加入有效量的通过将羟基取代到预先形成的反应性聚合物上得到的水溶性聚合物,其中水溶性聚合物具有至少20摩尔%的羟基。