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    • 128. 发明申请
    • Water-soluble polymers having lowered molecular weights, process for production of the same and usage thereof
    • 具有降低分子量的水溶性聚合物,其制备方法及其用途
    • US20060148949A1
    • 2006-07-06
    • US10546093
    • 2004-02-19
    • Motosuke Ono
    • Motosuke Ono
    • C08K5/05
    • D21H19/58B41M5/0011C08F8/50C08K5/09C08L33/14C08L39/02C08F220/48C08F220/34C08F220/56C08F126/02C08F120/56
    • The invention relates to water-soluble polymers reduced in molecular weight, a process for production of the same, and usage thereof. It makes it possible to obtain water-soluble polymers reduced in molecular weight by a simple procedure and in an economical and simple manner by subjecting either an aqueous solution admixed with an aqueous solution of an oxidizing agent and containing an amount within the range of 10-60% by mass of a water-soluble polymer and having a viscosity of not lower than 3000 mPa·s or a granular composition admixed or impregnated with an aqueous solution of an oxidizing agent and containing an amount within the range of 10-60% by mass of a water-soluble polymer to oxidation reaction, not by the method of polymerization at elevated temperatures, which is an energy-consuming method, or by the method of polymerization using large amounts of a chain transfer agent and/or an initiator, which is one of the raw materials, and these water-soluble polymer reduced in molecular weight can be used fixing agents for improving the water resistance and/or light fastness of printed matters and, further, the solution viscosity of this water-soluble polymer reduced in molecular weight can be adjusted, hence the handleability thereof, among others, can be adjusted, by incorporating a water-soluble salt and/or a polymer additive in these water-soluble polymers reduced in molecular weight to give compositions comprising the water-soluble polymer reduced in molecular weight.
    • 本发明涉及分子量降低的水溶性聚合物,其制备方法及其用途。 通过简单的方法,以经济和简单的方式获得分子量降低的水溶性聚合物,可以通过将与氧化剂水溶液混合并且含量在10〜 60质量%的水溶性聚合物,并且具有不低于3000mPa.s的粘度或者将含有10-60%量的氧化剂水溶液混合或浸渍的颗粒组合物 质量的水溶性聚合物进行氧化反应,而不是通过在高温下聚合的方法,这是一种耗能方法,或通过使用大量链转移剂和/或引发剂的聚合方法,其中 是原料之一,可以使用分子量降低的这些水溶性聚合物,可用于提高印刷品的耐水性和/或耐光性的固定剂,此外, 可以调节该分子量降低的水溶性聚合物的溶液粘度,因此可以通过在分子中还原的这些水溶性聚合物中加入水溶性盐和/或聚合物添加剂来调节其操作性 重量以得到包含分子量降低的水溶性聚合物的组合物。