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    • 9. 发明授权
    • Aqueous process for preparing aqueous weight carboxyl containing polymers
    • 用于制备含水重量含羧基聚合物的水性方法
    • US06335404B1
    • 2002-01-01
    • US08223351
    • 1994-04-05
    • Thomas Cleveland KirkDavid Witiak
    • Thomas Cleveland KirkDavid Witiak
    • C08F216
    • C08F220/04C02F5/10C11D3/3757C11D3/3769C11D3/3773C11D3/3776C11D3/3784C23F11/173C23F14/02
    • The present invention provides an efficient aqueous polymerization process for preparing a water soluble polymer product having a molecular weight of less than 30,000. The polymer product is formed from about 3 to about 50 weight percent of at least one monoethylenically unsaturated dicarboxylic acid monomer, from about 50 to about 97 weight percent of at least one monoethylenically unsaturated monocarboxylic acid monomer, and from 0 to about 40 weight percent of one or more carboxyl-free monoethylenically unsaturated monomers. The process of the present invention may be run as a batch or continuous process. The process uses at least one chain transfer agent and is conducted at an aqueous solution pH of about 3 or less to keep the molecular weight of the polymer product below 30,000. The polymer product produced by the process of the present invention is useful as an additive in detergents, cleaning formulations, and water circulating systems.
    • 本发明提供了一种用于制备分子量小于30,000的水溶性聚合物产品的有效的水性聚合方法。 聚合物产物由约3至约50重量%的至少一种单烯键式不饱和二羧酸单体,约50至约97重量%的至少一种单烯属不饱和单羧酸单体和0至约40重量% 一种或多种无羧基单烯属不饱和单体。 本发明的方法可以以分批或连续方法进行。 该方法使用至少一种链转移剂,并在约3或更低的水溶液pH下进行,以保持聚合物产物的分子量低于30,000。 通过本发明方法生产的聚合物产品可用作洗涤剂,清洁配方和水循环系统中的添加剂。