公开(公告)号：JP2001322854A

公开(公告)日：2001-11-20

申请号：JP2000140187

申请日：2000-05-12

Applicant: KAO CORP

Inventor： SHIBA DAISUKE ,  SATO HARUYUKI ,  MIZUNO WATARU ,  KONO YOSHINAO ,  YADOKORO YOSHIAKI

IPC: C04B24/26 ,  C04B24/32 ,  C04B40/00 ,  C04B103/40 ,  C08F2/00 ,  C08F290/04

Abstract: PROBLEM TO BE SOLVED: To provide a cement dispersant by the use of which dispersion properties, dispersion retentivity and initial strength of concrete can highly be exhibited under a wide variety of concrete production conditions. SOLUTION: This cement dispersant contains a copolymer mixture I and another copolymer mixture II, wherein: the copolymer mixture I is obtained by copolymerizing a specific monomer A such as ethylenically unsaturated carboxylic acid derivative having a polyoxyalkylene group, and another specific monomer such as (meth)acrylic acid, and in the copolymerization, the A/B molar ratio is at least once changed in the process of this reaction; and the copolymer mixture II is obtained from such monomers A and B, similarly to the copolymer mixture I, however, has an average weight ratio of the monomer B to the total weight of the constituent monomers of the copolymers in the copolymer mixture II, different from that of the copolymer mixture I.

公开(公告)号：JPH06340459A

公开(公告)日：1994-12-13

申请号：JP23134193

申请日：1993-09-17

Applicant: KAO CORP

Inventor： YAMATO FUJIO ,  FUJITA SHUICHI ,  YADOKORO YOSHIAKI ,  SATO HARUYUKI

IPC: C04B24/22 ,  C04B24/30 ,  C04B103/40

Abstract: PURPOSE:To obtain a cement dispersing agent capable of eliminating transportation trouble by pumping because there is no slump loss over a long time. CONSTITUTION:This cement dispersing agent is a formaldehyde cocondensation produce of one or more kinds selected from aromatic compounds obtained by introducing 1-100mol 2-3C oxyalkylene group and one or more kinds selected from materials cocondensable with formaldehyde and has sulfonate group or sulfomethyl group in the cocondensation product.

公开(公告)号：JPH06298557A

公开(公告)日：1994-10-25

申请号：JP8331593

申请日：1993-04-09

Applicant: KAO CORP

Inventor： YAMATO FUJIO ,  FUJITA SHUICHI ,  YADOKORO YOSHIAKI ,  SATO HARUYUKI

IPC: C04B24/26

Abstract: PURPOSE:To improve fluidity, fluidity retention, foaming properties and foaming retention and to facilitate quality control, comprising a copolymer prepared by polymerizing specific three kinds of compounds. CONSTITUTION:(A) A monomer of formula I (R1-2 are H or methyl; m1 is 0-2; n1 is 1-100; x1 is H or 1-3C alkyl; x1 is H or 1-3C alkyl) having 1-100 ethylene oxide addition mols on the average is polymerized with (B) a monomer of formula II (R3-4 is H or methyl; m2 is 0-2; n2 is 1-50; x2 is H or 1-3C alkyl) having 1-50 propylene oxide addition mols on the average and (C) an acrylic acid-based or unsaturated dicarboxylic acid-based monomer of formula III [R5 is H or methyl; R6-7 is (CH2)m3COOM4, H or methyl; m3 is 0-2; M3-4 are H, monovalent metal ammonium, amino or substituted amino] in the ratio of (A)/(B)/(C)=10-90/1-30/10-90 with water in a nitrogen atmosphere at pH9 at about 60 deg.C to give a copolymer having 1,000-1,000,000 weight-average molecular weight.

公开(公告)号：JPH05238798A

公开(公告)日：1993-09-17

申请号：JP4336692

申请日：1992-02-28

Applicant: KAO CORP

Inventor： IZUMI TATSUO ,  YADOKORO YOSHIAKI ,  KITAGAWA KAZUE ,  IKEGUCHI MASAAKI

IPC: C04B24/26 ,  C04B24/16 ,  C04B28/04 ,  C08F290/00 ,  C08F299/02

Abstract: PURPOSE:To provide the cement admixture effective for improving the dispersibility suppressing a slump loss arid improving strength and durability to a cement compsn. by consisting this admixture of a copolymer of a polyalkylene glycol diester monomer having an unsatd. bond and a sulfonic acid-based monomer having an unsatd. bond and/or the metal salt thereof. CONSTITUTION:This cement admixture consists of the copolymer of (1) the polyalkylene glycol diester monomer having the unsatd. bond and (2) the sulfonic acid-based monomer having the unsatd. bond and/or the metal salt of this copolymer. The monomer (1) is exemplified by formula I and the monomer (2) by the monomers of formulas II, III. In the formula I, R , R , R , R denote hydrogen, methyl group, (CH2)m3COOM , etc.; AO denotes 2 to 3C oxyalkylene group; m1 to m3 denote an integer from 0 to 2; n1 denotes an integer from 3 to 500; M denotes hydrogen univalent metal, etc., In the formulas II, III, R and R demote hydrogen, a methyl group; Y denotes (CH2)m8, etc.; m8 denotes an integer from 0 to 5; M denotes a bivalent group.

公开(公告)号：JPH0578156A

公开(公告)日：1993-03-30

申请号：JP1621892

申请日：1992-01-31

Applicant: KAO CORP

Inventor： IZUMI TATSUO ,  YADOKORO YOSHIAKI ,  KITAGAWA KAZUE

IPC: C04B24/22 ,  C04B24/26 ,  C04B24/30

Abstract: PURPOSE:To maintain workability for many hours and to improve retention of fluidity and prevention of material separation, comprising a specific copolymer and a formaldehyde condensate. CONSTITUTION:One or more compounds selected from the group consisting of phenol (derivative), melamine (derivative) and urea are (co)condensed with formaldehyde by using an amino-based short-stop selected from compounds of the formula (X1 is H, 1-3C alkyl or methoxy; Y1 is carboxyl, etc.) to give a formaldehyde condensate (A). Then, one or more polymerizable monomers selected from ethylenically unsaturated monocarboxylic acid (metallic salt), its ester and an ethylenically unsaturated dicarboxylic acid (metallic salt) is polymerized or the polymerizable monomer is copolymerized with 2-6C polymerizable monomer to give a copolymer (B). Then the components A and B are mixed in a given ratio to produce a cement admixture.

公开(公告)号：JPH0517187A

公开(公告)日：1993-01-26

申请号：JP16153791

申请日：1991-07-02

Applicant: KAO CORP

Inventor： IZUMI TATSUO ,  YADOKORO YOSHIAKI ,  KITAGAWA KAZUE

IPC: C04B24/22 ,  C04B24/30

Abstract: PURPOSE:To obtain high-strength concrete excellent in dispersibility and strength by using a specific formaldehyde (co)condensate an an admixture material in combination and producing a concrete within an ultrahigh water-reducing region. CONSTITUTION:A cement dispersing agent consisting essentially of a condensate which is a formaldehyde condensate or cocondensate, prepared by condensing a monomer condensable with the formaldehyde and an amino-based polymerization terminator are used in combination and having 10000-150000 weight-average molecular weight and =1000 molecular weight and an admixture are used in combination to produce concrete within an ultrahigh water-reducing region at 12-30% weight ratio of the water/(cement + admixture material). Thereby, a high-strength concrete is obtained. The amount of the admixture material used is preferably 5-30wt.% expressed in terms of the solid content based on the cement of the hydraulic cement composition.

公开(公告)号：JPH04345612A

公开(公告)日：1992-12-01

申请号：JP11867391

申请日：1991-05-23

Applicant: KAO CORP

Inventor： IZUMI TATSUO ,  FUJITA SHUICHI ,  YADOKORO YOSHIAKI ,  KITAGAWA KAZUE

IPC: C08G14/06

Abstract: PURPOSE:To facilitate the formation of the title condensate having an excellent stability and a specified molecular weight (distribution) by (co)condensing a compound selected from among a phenol (derivative), a melamine (derivative) and urea with HCHO at a specified pH by using a specified shortstop. CONSTITUTION:At least one compound selected from among a phenol (derivative), a melamine (derivative) and urea (e.g. phenol and urea) is (co)condensed with HCHO at a pH of 3-12 in the presence of an amine shortstop (e.g. sulfanilic acid).

公开(公告)号：JPH04108648A

公开(公告)日：1992-04-09

申请号：JP22587390

申请日：1990-08-28

Applicant: KAO CORP

Inventor： IZUMI TATSUO ,  YADOKORO YOSHIAKI ,  YAMATO FUJIO ,  FUJITA SHUICHI

IPC: C04B28/02

Abstract: PURPOSE:To obtain high strength concrete by producing concrete in the region of extremely highly reduced water content by using, as a cement dispersing agent, a highly condensed condensation product of aromatic sulfonic acid with formaldehyde or its salt and also using an admixture in combination with the above. CONSTITUTION:Concrete is produced in the region of extremely highly reducing water content, where the ratio of water/(cement + admixture) is 12-30%, by combinedly using blended cement, an admixture mentioned later, a condensation product of aromatic sulfonic acid with formaldehyde composed essentially of a high condensation product, in which the content of the salt of the condensation product of aromatic sulfonic acid with formaldehyde having =20000 or its salt. As the above condensation product of aromatic sulfonic acid with formaldehyde or its salt, e.g. a condensation product of naphthalenesulfonic acid, melaminesulfonic acid, etc., with formaldehyde or its salt can be cited. As the admixture, e.g. fly ash, cylinder ash, clinker ash, blast furnace slag, silica fume, etc., can be cited.

公开(公告)号：JPH01270550A

公开(公告)日：1989-10-27

申请号：JP9750188

申请日：1988-04-20

Applicant: KAO CORP

Inventor： MIZUNUMA TATSUYA ,  TAMAOKI RYOICHI ,  KANZAKI SHIYOUJI ,  YADOKORO YOSHIAKI ,  YAMATO FUJIO

IPC: C04B24/26 ,  C04B22/06 ,  C04B28/02

Abstract: PURPOSE:To prevent sustained release performance from deteriorating even in preservation for a long period by dispersing a fine particulate olefin- ethylenically unsaturated dicarboxylic acid anhydride copolymer and zinc (hydr) oxide in water and using the resultant dispersion as an admixture for cement. CONSTITUTION:An admixture for cement obtained by dispersing 100 pts.wt. fine particulate copolymer of a 2-8C olefin with an ethylenically unsaturated dicarboxylic acid anhydride having 0.1-20mum, desirably 0.1-5mum average particle diameter, preferably isobutylene-maleic anhydride copolymer (preferably about 500-50000 average molecular weight) and zinc oxide or hydroxide containing zinc in an amount of 1-2mol based on one ring in the copolymer in an amount of 15-300 pts.wt., desirably 40-100 pts.wt. expressed in terms of zinc in combination in water at pH 6-12. The above-mentioned admixture for cement is capable of both preventing performance of operability on concrete, etc., from deteriorating with time and remarkably improving preservation stability in water.

公开(公告)号：JPS63176342A

公开(公告)日：1988-07-20

申请号：JP447587

申请日：1987-01-12

Applicant: KAO CORP

Inventor： IIZUKA MASANORI ,  YADOKORO YOSHIAKI ,  MINAMI SHIGEYUKI ,  YAMANAKA SHUICHI

IPC: C04B22/08 ,  C04B14/10