公开(公告)号：JPH0517189A

公开(公告)日：1993-01-26

申请号：JP16564191

申请日：1991-07-05

Applicant: KAO CORP

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

IPC: C04B24/22 ,  C04B24/30 ,  C08G14/06

Abstract: PURPOSE:To obtain a cement admixture capable of reducing slump loss caused in a hydraulic cement composition by using a formaldehyde adduct cocondensate of 3-5 components composed of specific compounds as a component. CONSTITUTION:A formaldehyde adduct cocondensate of 3-5 components compose. of compounds expressed by formulas I, II and/or III and IV and/or V is used as a component of a cement admixture. In the formula, R denotes H or lower alkyl; X denotes alkali metal; X1 denotes H, alkyl, carboxyl or its alkali metallic salt, sulfone group or its alkali metallic salt, OH or methoxy group; Y denotes carboxyl group or its alkali metallic salt, sulfone group or its alkali metallic salt; groups Z denote H or -CH2SO3X (X denotes alkali metal), provided that at least two of the groups Z denote H. The formaldehyde adduct cocondensate to be used has a three-dimensional molecular structure and it is presumed that the slump loss can be reduced thereby.

公开(公告)号：JPH0492841A

公开(公告)日：1992-03-25

申请号：JP20652490

申请日：1990-08-03

Applicant: KAO CORP

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

IPC: C04B24/22

Abstract: PURPOSE:To steeply improve workability of concrete in ultra-high water- reducing region by using an aromatic formalin sulfonate condensate having a fixed molecular weight as a principal component. CONSTITUTION:The aimed cement dispersant is composed of an aromatic formalin sulfonate condensate as a principal component. Said condensate has >=2X10 weight-average molecular weight and contains molecular weight. Furthermore, said aromatic sulfonic acid is composed of naphthalenesulfonic acid, alkylnaphthalenesulfonic acid or melaminesulfonic acid, etc.

公开(公告)号：JPH0412038A

公开(公告)日：1992-01-16

申请号：JP11377090

申请日：1990-04-27

Applicant: KAO CORP

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

IPC: C04B28/04 ,  C04B24/22 ,  C08G8/00 ,  C08G8/18

Abstract: PURPOSE:To eliminate occurrence of deposition and precipitation of crystals in storage at low temperatures and facilitate handling by containing K salt and Na salt of phenolsulfonic acid adduct or condensate with formaldehyde in a specific proportion. CONSTITUTION:The aforementioned dispersant composition contains an adduct or condensate of phenolsulfonic acid in which sulfonic acid group containing the acid radical thereof forming Na salt or K salt is introduced thereinto with formaldehyde and the state thereof is an aqueous solution. The above-mentioned composition is obtained by neutralizing the sulfonic acid group in the above- mentioned molecule with a neutralizing agent composed of NaOH/KOH at (1/0.2)-(1/5) molar ratio.

公开(公告)号：JPH03257053A

公开(公告)日：1991-11-15

申请号：JP5564490

申请日：1990-03-07

Applicant: KAO CORP

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

IPC: C04B24/22 ,  C04B24/30 ,  C04B28/02 ,  C08G61/00

Abstract: PURPOSE:To enhance the slump loss-preventive properties of cement composition by utilizing the oxidative copolymer of both naphthalenesulfonic acid (salt), alkyl naphthalenesulfonic acid (salt) and an aromatic compd. contg. a hydrophilic group as the essential component of a cement dispersant. CONSTITUTION:(a) Naphthalenesulfonic acid, alkyl naphthalenesulfonic acid, formalin condensate thereof or salts thereof arc allowed to react with (b) an aromatic compd. having a hydrophilic group by oxidative polymerization. A slump loss-prevention type cement dispersant is produced by incorporating the obtained oxidative copolymer as an essential component. As the component (b), a benzene derivative and a naphthalene derivative are shown which have one or more kinds of hydrophilic group such as hydroxyl group, carboxyl group, amino group and sulfo group. The oxidative copolymer is obtained by oxidative polymerization reaction due to metallic oxide such as e.g. permanganate.

公开(公告)号：JPS6360141A

公开(公告)日：1988-03-16

申请号：JP20532786

申请日：1986-09-01

Applicant: KAO CORP

Inventor： TSUJI AKITOSHI ,  YADOKORO YOSHIAKI

IPC: B28B21/30 ,  B28B1/34 ,  C04B24/16 ,  C04B24/26 ,  C04B24/30 ,  C04B24/32 ,  C04B103/40

公开(公告)号：JPS61122147A

公开(公告)日：1986-06-10

申请号：JP24013584

申请日：1984-11-14

Applicant: Kao Corp

Inventor： IIZUKA MASANORI ,  MIZUNUMA TATSUYA ,  YADOKORO YOSHIAKI

IPC: C04B24/22 ,  B28B21/30 ,  C04B22/06 ,  C04B24/04 ,  C04B24/16 ,  C04B24/26 ,  C04B28/02