公开(公告)号：JP2000355615A

公开(公告)日：2000-12-26

申请号：JP32209699

申请日：1999-11-12

Applicant: NIPPON CATALYTIC CHEM IND

Inventor： MAEDA YOSHIHIRO ,  HENMI AKIKO ,  YAMAGUCHI SHIGERU

IPC: C02F5/00 ,  C02F5/10 ,  C08F2/10 ,  C08F220/04 ,  C08F222/02 ,  C09C3/10 ,  C11D3/37 ,  D06M15/263

Abstract: PROBLEM TO BE SOLVED: To obtain a water-soluble copolymer useful for detergent composition or as a water-treating agent or the like, which copolymer comprises structural units derived from a monoethylenically unsaturated dicarboxylic acid monomer, structural units derived from a monoethylenically unsaturated monocarboxylic acid monomer, and structural units derived from a sulfo-containing monoethylenically unsaturated monomer and has specified functions such as a Ca ion scavenging capacity. SOLUTION: This copolymer essentially consists of structural units derived from (A) a 4-6C monoethylenically unsaturated dicarboxylic acid (salt or anhydride) monomer, structural units derived from (B) a 3-8C monoethylenically unsaturated monocarboxylic acid (salt) monomer, and (C) structural units derived from a sulfo(sulfonate)-containing monoethylenically unsaturated monomer and has a Ca ion scavenging capacity of at feast 0.40, a capacity of dispersing clay in high-hardness water of at least 0.35, and a gelation resistance of at least 0.35. The copolymer is one prepared by polymerizing 30-70 mol% component A with 30-70 mol% component B, 2-16 mol% component C, and 0-5 mol% copolymerizable monoethylenically unsaturated monomer and having a weight-average molecular weight of 2,000-20,000.

公开(公告)号：JP2002080502A

公开(公告)日：2002-03-19

申请号：JP2001200140

申请日：2001-06-29

Applicant: NIPPON CATALYTIC CHEM IND

Inventor： HENMI AKIKO ,  FUJII GIICHI ,  YAMAGUCHI SHIGERU ,  MAEDA YOSHIHIRO

IPC: C11D3/37 ,  C08F2/00 ,  C08F2/10 ,  C08F4/30 ,  C08F20/06

Abstract: PROBLEM TO BE SOLVED: To obtain a low-molecular weight (meth)acrylic acid (salt)-based polymer having an excellent color tone and to provide a method for producing the same and its application. SOLUTION: This method comprises polymerizing a monomer component composed of 100-95 mol% of a monoethylenic unsaturated monomer of a 3-6C monocarboxylic acid (salt) (a) and 0-5 mol% of a monoethylenic unsaturated monomer (b) copolymerizable with the monomer (a) (the total of the components (a) and (b) is 100 mol%) in the presence of an alkali substance in a highly concentrated aqueous solution. Both a sulfate and hydrogen peroxide are used as polymerization catalysts. The total amount of the alkali substance used is S99 mol% of the amount required for neutralizing the whole acid groups of the monomer component. The drip of hydrogen peroxide is finished within ten minutes or more earlier than the time when the drip of the monomer is finished and/or the amount of hydrogen peroxide dripped before the start of the drip of the monomer component is controlled to

公开(公告)号：JP2002012627A

公开(公告)日：2002-01-15

申请号：JP2000344483

申请日：2000-11-10

Applicant: NIPPON CATALYTIC CHEM IND

Inventor： MAEDA YOSHIHIRO ,  HENMI AKIKO ,  YAMAGUCHI SHIGERU

IPC: B01J39/20 ,  C08F220/02 ,  C08F222/02 ,  C09K3/00 ,  C11D3/37

Abstract: PROBLEM TO BE SOLVED: To obtain a specific water-soluble polymer exhibiting a high action for scavenging a calcium ion and showing a high action for dispersing clay even in high-hardness water, a detergent composition containing the polymer and to provide uses except the detergent composition by making the best of the characteristics of the water-soluble polymer. SOLUTION: This specific water-soluble polymer is characterized in that the polymer has >=0.40 calcium ion scavenging ability and >=0.50 clay dispersion ability in high-hardness water and is preferably obtained by compounding a polymer A having >=0.45 calcium ion scavenging ability with a polymer B having >=0.65 clay dispersion ability as essential components. This detergent composition obtained by using the water-soluble polymer has improved detergency even in high-hardness water.