Title:
POLYCARBOXYLIC ACID TYPE COPOLYMER AND METHOD FOR PRODUCING THE SAME, AND USE OF THE SAME
Document Type and Number:
WIPO Patent Application WO/2002/053611
Kind Code:
A1
Abstract:
A polycarboxylic acid type copolymer, characterized in that it is produced by copolymerizing a monomer component comprising a polyalkylene imine type unsaturated monomer (A1) and a unsaturated carboxylic acid type monomer (B); a method for producing the copolymer; and a cement additive and a cement composition which comprise the copolymer. The polycarboxylic acid type copolymer and the cement additive allow the production of a cement composition or the like having improved water reducing property and workability or having the same water reducing property and flowability as those of a conventional composition and improved easiness in handling, which also yields a hardened product having excellent strength and durability, and thus can be suitably used in producing an ultra high strength concrete. In some embodiments, the polycarboxylic acid type copolymer has high water reducing capability and also can decrease the viscosity of a cement composition or the like, resulting in the improved workability during cement work.
Inventors:
YUASA TSUTOMU
NISHIKAWA TOMOTAKA
SAKAMOTO NOBORU
HIRATA TSUYOSHI
IZUKASHI HIROKO
UETA TOMIYASU
TANAKA HIROMICHI
ONDA YOSHIYUKI
UNO TORU
NISHIKAWA TOMOTAKA
SAKAMOTO NOBORU
HIRATA TSUYOSHI
IZUKASHI HIROKO
UETA TOMIYASU
TANAKA HIROMICHI
ONDA YOSHIYUKI
UNO TORU
Application Number:
PCT/JP2001/011437
Publication Date:
July 11, 2002
Filing Date:
December 26, 2001
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C04B24/26; C04B24/32; C08F290/00; C08F290/06; C08G65/26; C08L51/04; C08L53/00; C08L55/02; C08L71/02; (IPC1-7): C08F290/06; C04B24/26; C04B28/02
Foreign References:
| JPH0710943A | 1995-01-13 | |||
| JPH07247150A | 1995-09-26 | |||
| JP2000159555A | 2000-06-13 | |||
| JP2000247706A | 2000-09-12 | |||
| JP2000319054A | 2000-11-21 | |||
| JP2001146447A | 2001-05-29 | |||
| JP2001146449A | 2001-05-29 | |||
| JP2001220440A | 2001-08-14 | |||
| JPH11269239A | 1999-10-05 | |||
| JP2000063164A | 2000-02-29 | |||
| US4650522A | 1987-03-17 |
Other References:
See also references of EP 1361233A4
Attorney, Agent or Firm:
Yasutomi, Yasuo (4-20 Nishinakajima 5-chome, Yodogawa-k, Osaka-shi Osaka, JP)
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