Compositions – Water-softening or purifying or scale-inhibiting agents – Plant or organic material containing
Patent
1990-12-19
1992-08-04
Lieberman, Paul
Compositions
Water-softening or purifying or scale-inhibiting agents
Plant or organic material containing
252 82, 25217424, 5263171, 5263182, 526271, 526272, C02F 510, C08F22206, C08F12206
Patent
active
051356775
ABSTRACT:
The present invention relates to a process for producing an acid-type polymaleic acid and acid-type maleic acid copolymer and also to the usage of the acid-type polymaleic acid and acid-type maleic acid copolymer produced by this process.
According to the process of the present invention, the acid-type polymaleic acid and acid-type maleic acid copolymer, which are superior as a water-treating agent and detergent additive, are produced by polymerization of acid-type monomers in an aqueous solution. The process is simple and yields a polymer having a low molecular weight and a narrow molecular-weight distribution. The process permits one to economically produce the acid-type polymaleic acid and acid-type maleic acid copolymer which has good quality and outstanding performance as a water-treating agent etc. Thus the invention is a great boon to the industrial field of water treatment.
REFERENCES:
patent: 3635915 (1972-01-01), Gale
patent: 3846383 (1974-11-01), Uyama et al.
patent: 4314044 (1982-02-01), Hughes
patent: 4589995 (1989-05-01), Fukumoto
patent: 4659793 (1987-04-01), Yang
patent: 4818795 (1989-04-01), Denzinger et al.
Fujiwara Teruaki
Irie Yoshio
Shioji Shorbu
Yamaguchi Shigeru
Lieberman Paul
Nippon Shokubai Co. , Ltd.
Swope Bradley A.
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