JP2002012461A5 - - Google Patents
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- JP2002012461A5 JP2002012461A5 JP2001121651A JP2001121651A JP2002012461A5 JP 2002012461 A5 JP2002012461 A5 JP 2002012461A5 JP 2001121651 A JP2001121651 A JP 2001121651A JP 2001121651 A JP2001121651 A JP 2001121651A JP 2002012461 A5 JP2002012461 A5 JP 2002012461A5
- Authority
- JP
- Japan
- Prior art keywords
- polyalkylene glycol
- cement admixture
- meth
- acrylate
- carboxylic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Description
【特許請求の範囲】
【請求項1】
ポリアルキレングリコール(A)と、ポリアルキレングリコールモノ(メタ)アクリレート/不飽和カルボン酸系共重合体(B)とを含むセメント混和剤であって、
前記ポリアルキレングリコール(A)の平均分子量(X)が400〜10000であり、かつ、該ポリアルキレングリコール(A)の平均分子量(X)と前記ポリアルキレングリコールモノ(メタ)アクリレート/不飽和カルボン酸系共重合体(B)のポリアルキレングリコール鎖部分の平均分子量(Y)が下記式(1)を満たしており、
0.9<(X/Y)<1.1 (1)
前記ポリアルキレングリコール(A)と前記ポリアルキレングリコールモノ(メタ)アクリレート/不飽和カルボン酸系共重合体(B)の重量比が(A)/(B)=0.02〜0.3である、
ことを特徴とする、セメント混和剤。
【請求項2】
前記ポリアルキレングリコールモノ(メタ)アクリレート/不飽和カルボン酸系共重合体(B)におけるカルボキシル基を全て未中和型に換算したときのカルボキシル基ミリ当量数が、0.25〜5.00meq/gである、請求項1に記載のセメント混和剤。
【請求項3】
前記ポリアルキレングリコール(A)が下記一般式(2)で表されるものである、請求項1または2に記載のセメント混和剤。
R 1 O(AO)mH (2)
(式(2)中、AOは炭素原子数2〜18のオキシアルキレン基を表わし(このとき、各AOの繰り返し単位は同一であってもあるいは異なっていてもよく、AOが2種以上の混合物の形態である場合には、各AOの繰り返し単位はブロック状に付加していてもあるいはランダム状に付加していてもよく、交互に付加していてもよい)、mはオキシアルキレン基の平均付加モル数であって8〜250の数を表わし、R 1 は水素原子または炭素原子数1〜30の炭化水素基を表わす。)
【請求項4】
前記ポリアルキレングリコール(A)のオキシアルキレン基の平均付加モル数(式(2)中のm)が25〜75である、請求項3に記載のセメント混和剤。
【請求項5】
前記ポリアルキレングリコールモノ(メタ)アクリレート/不飽和カルボン酸系共重合体(B)の重量平均分子量が、ゲルパーミエーションクロマトグラフィー(GPC)法によるポリエチレングリコール換算で、5,000〜300,000の範囲内である、請求項1から4までのいずれかに記載のセメント混和剤。
【請求項6】
請求項1から5までのいずれかに記載のセメント混和剤と水とセメントとを少なくとも含む、セメント組成物。
[Claims]
(1)
A cement admixture comprising a polyalkylene glycol (A) and a polyalkylene glycol mono (meth) acrylate / unsaturated carboxylic acid copolymer (B),
The average molecular weight (X) of the polyalkylene glycol (A) is 400 to 10,000, and the average molecular weight (X) of the polyalkylene glycol (A) and the polyalkylene glycol mono (meth) acrylate / unsaturated carboxylic acid The average molecular weight (Y) of the polyalkylene glycol chain portion of the copolymer (B) satisfies the following formula (1);
0.9 <(X / Y) <1.1 (1)
The weight ratio of the polyalkylene glycol (A) and the polyalkylene glycol mono (meth) acrylate / unsaturated carboxylic acid copolymer (B) is (A) / (B) = 0.02 to 0.3. ,
A cement admixture , characterized in that :
(2)
When the carboxyl groups in the polyalkylene glycol mono (meth) acrylate / unsaturated carboxylic acid copolymer (B) were all converted into unneutralized carboxyl groups, the equivalent number of carboxyl groups was 0.25 to 5.00 meq /. The cement admixture according to claim 1, which is g.
(3)
The cement admixture according to claim 1 or 2, wherein the polyalkylene glycol (A) is represented by the following general formula (2).
R 1 O (AO) mH (2)
(In the formula (2), AO represents an oxyalkylene group having 2 to 18 carbon atoms (in this case, the repeating units of each AO may be the same or different, and a mixture of two or more types of AOs) In the case of the form, the repeating unit of each AO may be added in a block shape or may be added in a random shape, and may be added alternately), and m is the average of the oxyalkylene group. (It is an addition mole number and represents a number of 8 to 250, and R 1 represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms.)
(4)
The cement admixture according to claim 3, wherein the average number of moles (m in the formula (2)) of the oxyalkylene group of the polyalkylene glycol (A) is 25 to 75.
(5)
The weight average molecular weight of the polyalkylene glycol mono (meth) acrylate / unsaturated carboxylic acid copolymer (B) is from 5,000 to 300,000 in terms of polyethylene glycol by gel permeation chromatography (GPC). Cement admixture according to any of the preceding claims, which is in the range.
[ 6 ]
A cement composition comprising at least the cement admixture according to any one of claims 1 to 5 , water and cement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001121651A JP4785267B2 (en) | 2000-04-28 | 2001-04-19 | Cement admixture and cement composition using the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000130949 | 2000-04-28 | ||
JP2000130949 | 2000-04-28 | ||
JP2000-130949 | 2000-04-28 | ||
JP2001121651A JP4785267B2 (en) | 2000-04-28 | 2001-04-19 | Cement admixture and cement composition using the same |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2002012461A JP2002012461A (en) | 2002-01-15 |
JP2002012461A5 true JP2002012461A5 (en) | 2008-01-17 |
JP4785267B2 JP4785267B2 (en) | 2011-10-05 |
Family
ID=26591255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001121651A Expired - Lifetime JP4785267B2 (en) | 2000-04-28 | 2001-04-19 | Cement admixture and cement composition using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4785267B2 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4448274B2 (en) * | 2002-01-23 | 2010-04-07 | 株式会社日本触媒 | Method of constructing cement admixture and cement composition |
JP4344111B2 (en) * | 2002-01-25 | 2009-10-14 | 株式会社日本触媒 | Cement admixture and cement composition |
JP4056809B2 (en) * | 2002-07-09 | 2008-03-05 | 花王株式会社 | Powder shrinkage reducing agent |
GB2435165B (en) * | 2004-10-04 | 2009-09-23 | Grace W R & Co | Integrally waterproofed concrete |
EP1795511A1 (en) | 2005-12-08 | 2007-06-13 | Sika Technology AG | Composition and its utilisation to improve the processability of hydraulic setting compositions |
JP5215680B2 (en) | 2008-01-28 | 2013-06-19 | コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー | Shrinkage reducing agent |
JP5312900B2 (en) * | 2008-07-01 | 2013-10-09 | 花王株式会社 | Additive composition for hydraulic composition |
JP2010006701A (en) * | 2009-10-06 | 2010-01-14 | Nippon Shokubai Co Ltd | Method for producing cement admixture |
JP5523189B2 (en) * | 2010-04-28 | 2014-06-18 | 株式会社日本触媒 | Shrinkage reducing agent composition for hydraulic material |
JP6091050B2 (en) * | 2011-02-09 | 2017-03-08 | 株式会社日本触媒 | Shrinkage reducing agent for hydraulic materials |
JP5818254B2 (en) * | 2011-11-29 | 2015-11-18 | 竹本油脂株式会社 | Admixture for blast furnace slag concrete and method for preparing blast furnace slag concrete |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0664956A (en) * | 1992-08-18 | 1994-03-08 | Kao Corp | Cement admixture |
JP3290335B2 (en) * | 1994-06-30 | 2002-06-10 | 花王株式会社 | Hydraulic composition |
JP3207047B2 (en) * | 1994-07-01 | 2001-09-10 | 花王株式会社 | Hydraulic composition |
JPH10139509A (en) * | 1996-11-13 | 1998-05-26 | Chichibu Onoda Cement Corp | Shrinkage reducing agent for cement and cement composition containing the same |
JPH10194807A (en) * | 1996-12-27 | 1998-07-28 | Kao Corp | Composition for self-leveling material |
JP3993679B2 (en) * | 1997-03-31 | 2007-10-17 | 太平洋セメント株式会社 | Shrinkage reducing agent for cement |
JP2000026146A (en) * | 1998-07-07 | 2000-01-25 | Taiheiyo Cement Corp | Powdery cement dispersant and cement composition using same |
US6362364B1 (en) * | 1998-09-22 | 2002-03-26 | Nippon Shokubai Co., Ltd. | Method for production of esterified product and apparatus therefor |
-
2001
- 2001-04-19 JP JP2001121651A patent/JP4785267B2/en not_active Expired - Lifetime
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