JPH0617257B2 - Dispersant for cement - Google Patents
Dispersant for cementInfo
- Publication number
- JPH0617257B2 JPH0617257B2 JP5297886A JP5297886A JPH0617257B2 JP H0617257 B2 JPH0617257 B2 JP H0617257B2 JP 5297886 A JP5297886 A JP 5297886A JP 5297886 A JP5297886 A JP 5297886A JP H0617257 B2 JPH0617257 B2 JP H0617257B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- unit represented
- formula
- vinyl polymer
- dispersant
- 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.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明はセメント用混和剤としての分散剤に関する。TECHNICAL FIELD The present invention relates to a dispersant as an admixture for cement.
コンクリートは、セメント、砂利、砂等を水と共に練
り、セメントの水和反応によって硬化させるものである
が、このとき補助剤として分散剤が多くの場合で使用さ
れる。分散剤は、水系におけるセメント粒子の分散をよ
くすることにより、作業性を向上させるものである。し
たがって、セメント用分散剤には、１）セメント粒子の
分散性が大きいこと、２）とりわけ該分散性の経時変化
が少ないこと（スランプロスが少ないこと）、３）そし
て工業的に製造されるものが上記の性能を安定して持つ
ものであること、これらの諸特性が要求される。Concrete is one in which cement, gravel, sand and the like are kneaded with water and hardened by a hydration reaction of cement. At this time, a dispersant is often used as an auxiliary agent. The dispersant improves workability by improving the dispersion of cement particles in an aqueous system. Therefore, the dispersant for cement is 1) that the dispersibility of the cement particles is large, 2) that the dispersibility of the dispersant is small over time (the slump loss is small), and 3) that is manufactured industrially. Must have the above-mentioned performance in a stable manner, and these various characteristics are required.
本発明はかかる諸特性を具備する改良されたセメント用
分散剤に関するものである。The present invention relates to an improved cement dispersant having such properties.
〈従来の技術、その問題点〉 従来、セメント用分散剤として、リグニンスルホン酸
塩、オキシカルボン酸塩、ナフタリンスルホン酸ホルマ
リン縮合物、多環芳香族スルホン酸塩、メラミンスルホ
ン酸ホルマリン縮合物塩等、多くの提案がある。これら
にはそれぞれ、相応の特長がある反面で相応の問題点も
あることは周知の通りである。<Conventional technology and its problems> Conventionally, as a cement dispersant, lignin sulfonate, oxycarboxylate, naphthalene sulfonic acid formalin condensate, polycyclic aromatic sulfonate, melamine sulfonic acid formalin condensate salt, etc. , There are many suggestions. It is well known that each of them has a corresponding feature, but has a corresponding problem.
一方、例えば鎖状オレフィン−エチレン性不飽和ジカル
ボン酸共重合体の水溶性塩のように、ビニル重合体をセ
メント用分散剤として使用する各種の提案がある（特開
昭５９−１６２１６０、特開昭５９−１６２１６４、特
開昭５９−１９５５６５、特開昭５９−２０３７４５、
特開昭６０−１６８５２、特開昭６０−２７６３６、特
開昭６０−５４９５７）。しかし、これらの従来提案に
は、前述したような諸特性を部分的に具備するものもあ
るが、該諸特性を全て具備するものはなく、実用に供す
るには未だ不充分という問題点がある。ビニル重合体を
水中コンクリート用混和剤として使用する提案もあるが
（特開昭６０−４２２６４）、もともと該ビニル重合体
の使用目的が相違することもあって、実際のところ、こ
の提案中で良好な結果が得られるとされているビニル重
合体をセメント用分散剤として使用してみても、よい結
果は得られない。On the other hand, there are various proposals for using a vinyl polymer as a dispersant for cement, such as a water-soluble salt of a chain olefin-ethylenically unsaturated dicarboxylic acid copolymer (JP-A-59-162160, JP-A-59-162160). 59-162164, JP-A-59-195565, JP-A-59-203745,
JP-A-60-16852, JP-A-60-27636, and JP-A-60-54957). However, although some of these conventional proposals partially include the above-mentioned various characteristics, none of them have all of the various characteristics, and there is a problem that they are still insufficient for practical use. . There is a proposal to use a vinyl polymer as an admixture for underwater concrete (Japanese Patent Laid-Open No. 60-42264), but since the purpose of use of the vinyl polymer is originally different, it is actually good in this proposal. Even when a vinyl polymer, which is said to give good results, is used as a dispersant for cement, good results are not obtained.
〈発明が解決しようとする問題点、その解決手段〉 本発明は、叙上の如き従来の問題点、特にビニル重合体
に関する問題点を解決して、前述したような諸特性を全
て具備する改良されたセメント用分散剤を提供するもの
である。<Problems to be Solved by the Invention, Means for Solving the Problems> The present invention solves the above-mentioned conventional problems, particularly the problems relating to vinyl polymers, and improves all the characteristics described above. The above-mentioned cement dispersant is provided.
しかして本発明者らは、以上の実情に鑑みて、良好なセ
メント用分散剤を得るべく鋭意研究した結果、分子内に
特定の親水性構成単位と特定の疎水性構成単位とをそれ
ぞれ所定割合で含有する特定構造のビニル重合体が正し
く好適であることを見出した。However, in view of the above circumstances, the present inventors have conducted extensive studies to obtain a good dispersant for cement, and as a result, a specific hydrophilic constitutional unit and a specific hydrophobic constitutional unit in the molecule each have a predetermined ratio. It was found that the vinyl polymer having a specific structure contained in 1. is correct and suitable.
すなわち本発明は、 下記式（Ｉ）で示される親水性の構成単位及び下記式(I
I)で示される親水性の構成単位並びに下記式(III)で示
される疎水性の構成単位を含有する水溶性或いは水分散
性のビニル重合体であって、式(I)で示される構成単位
／式(II)で示される構成単位／式(III)で示される構成
単位＝５〜４０／９０〜４０／５〜４０（各重量％）の
割合で構成されるビニル重合体から成ることを特徴とす
るセメント用分散剤に係る。That is, the present invention provides a hydrophilic constitutional unit represented by the following formula (I) and the following formula (I
A water-soluble or water-dispersible vinyl polymer containing a hydrophilic structural unit represented by I) and a hydrophobic structural unit represented by the following formula (III), the structural unit represented by the formula (I) / Structural unit represented by the formula (II) / Structural unit represented by the formula (III) = 5 to 40/90 to 40/5 to 40 (each weight%) It relates to a characteristic cement dispersant.
［但し、Ｒ１，Ｒ２，Ｒ３はＨ又はＣＨ３。Ｍ１，Ｍ２
はＨ、アルカリ金属、アルカリ土類金属又はアルカノー
ルアミン。ＸはＣＯＯＲ５（Ｒ５は炭素数１〜８のアル
キル基）、ＣＮ、Ｃ６Ｈ５又はＯＣＯＣＨ３。ｎは０又
は１。］ 本発明のビニル重合体において、式(I)で示される親水
性の構成単位を形成することとなるモノマー成分として
は、ビニルスルホネート、アリルスルホネート、メタク
リルスルホネート、及びこれらのアルカリ金属塩、アル
カリ土類金属塩、アルカノールアミン塩等がある。ま
た、式(II)で示される親水性の構成単位を形成すること
となるモノマー成分としては、アクリル酸、メタクリル
酸、及びこれらのアルカリ金属塩、アルカリ土類金属
塩、アルカノールアミン塩等がある。更に、式(III)で
示される疎水性の構成単位を形成することとなるモノマ
ー成分としては、アクリル酸メチル、メタクリル酸メチ
ル、アクリル酸エチル、メタクリル酸エチル、アクリル
酸プロピル、メタクリル酸プロピル、アクリル酸ブチ
ル、メタクリル酸ブチルの如きアクリル酸或いはメタク
リル酸の低級アルキルエステル、スチレン、アクリロニ
トリル、及び酢酸ビニル等がある。 [However, R 1 , R 2 , and R 3 are H or CH 3 . M 1 , M 2
Is H, alkali metal, alkaline earth metal or alkanolamine. X is COOR 5 (R 5 is an alkyl group having 1 to 8 carbon atoms), CN, C 6 H 5 or OCOCH 3 . n is 0 or 1. In the vinyl polymer of the present invention, the monomer component that forms the hydrophilic constitutional unit represented by the formula (I) includes vinyl sulfonate, allyl sulfonate, methacryl sulfonate, and alkali metal salts and alkaline earth salts thereof. Examples thereof include metal salts and alkanolamine salts. The monomer component that forms the hydrophilic constitutional unit represented by the formula (II) includes acrylic acid, methacrylic acid, and their alkali metal salts, alkaline earth metal salts, and alkanolamine salts. . Further, the monomer component that forms the hydrophobic structural unit represented by the formula (III), methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, acrylic There are lower alkyl esters of acrylic acid or methacrylic acid such as butyl acrylate and butyl methacrylate, styrene, acrylonitrile, and vinyl acetate.
上記のようなモノマー成分から形成される各構成単位の
ビニル重合体における含有割合は、式(I)で示される構
成単位／式(II)で示される構成単位／式(III)で示され
る構成単位＝５〜４０／９０〜４０／５〜４０（各重量
％）とする。各構成単位の含有割合が上記の範囲から外
れると、得られるビニル重合体をセメント用分散剤とし
て使用した場合に、分散力が不足気味となったり、その
経時変化が起きやすくなったりする。特に、式(III)で
示される疎水性の構成単位は重要である。式(I)や式(I
I)で示される親水性の構成単位だけからなるビニル重合
体では、分散性を示すものの該分散性の経時変化が大き
く、実用上大きな問題となるのに対し、これらに式(II
I)で示される疎水性の構成単位が含まれるビニル重合体
すなわち本発明のビニル重合体はそのような経時変化が
少ない良好な結果を与えるからである。分散性の経時変
化に関する本発明の上記のような特長的効果は、式(I)
や式(II)で示される親水性の構成単位に対する式(III)
で示される疎水性の構成単位それ自体の本質的特性及び
得られるビニル重合体の化学構造等によるものと考えら
れる。The content ratio of each structural unit formed from the above monomer components in the vinyl polymer is such that the structural unit represented by the formula (I) / the structural unit represented by the formula (II) / the configuration represented by the formula (III) Unit = 5 to 40/90 to 40/5 to 40 (each weight%). When the content ratio of each structural unit is out of the above range, when the obtained vinyl polymer is used as a dispersant for cement, the dispersive power tends to be insufficient or its change with time tends to occur. In particular, the hydrophobic constitutional unit represented by the formula (III) is important. Formula (I) or formula (I
In the vinyl polymer consisting only of the hydrophilic constitutional unit represented by (I), the dispersibility of the vinyl polymer is large, but the dispersibility is large with time, which is a serious problem in practical use.
This is because the vinyl polymer containing the hydrophobic constitutional unit represented by I), that is, the vinyl polymer of the present invention gives good results with less such aging. The above-mentioned characteristic effects of the present invention regarding the change with time of dispersibility are represented by the formula (I).
And the formula (III) for the hydrophilic constitutional unit represented by the formula (II)
It is considered to be due to the essential characteristics of the hydrophobic constitutional unit itself represented by and the chemical structure of the resulting vinyl polymer.
本発明のビニル重合体は、以上説明したような式(I)〜
式(III)で示される各構成単位をそれぞれ所定割合で含
有するもので、実質的にはこれら三つの構成単位から成
るものであるが、全構成単位の１０重量以下の範囲内で
他の構成単位を含有していてもよく、これには例えば、
アクリルアミド、メタクリルアミド、無水マレイン酸、
無水イタコン酸、ヒドロキシエチルメタクリレート等か
ら導かれる構成単位がある。The vinyl polymer of the present invention has the formula (I) as described above.
Each of the constitutional units represented by the formula (III) is contained at a predetermined ratio, and is substantially composed of these three constitutional units. It may contain units, for example:
Acrylamide, methacrylamide, maleic anhydride,
There are structural units derived from itaconic anhydride, hydroxyethyl methacrylate and the like.
本発明のビニル重合体としては、その分子量が数平均分
子量で５００〜２００００（ＧＰＣ法、ポリエチレング
リコール換算）のものが好ましい。分子量がこれより高
すぎると、かかるビニル重合体をセメント用分散剤とし
て使用した場合に分散性が不足気味となり、逆に分子量
がこれより低すぎると、効果の経時変化が起き易くなる
傾向を示す。The vinyl polymer of the present invention preferably has a number average molecular weight of 500 to 20,000 (GPC method, polyethylene glycol conversion). If the molecular weight is higher than this, dispersibility tends to be insufficient when such a vinyl polymer is used as a dispersant for cement, and conversely, if the molecular weight is lower than this, the effect tends to change over time. .
本発明のビニル重合体の製造方法は、本発明で特に限定
するものではなく、従来公知の方法がいずれも適用でき
るが、操作の簡便さ等から、各モノマー成分を水系或い
は水／水溶性有機溶媒の混合系で溶液重合するのが好ま
しい。The method for producing the vinyl polymer of the present invention is not particularly limited in the present invention, and any conventionally known method can be applied, but each monomer component is water-based or water / water-soluble organic due to the ease of operation and the like. Solution polymerization is preferably carried out in a mixed solvent system.
本発明に係るセメント用分散剤は、以上説明したビニル
重合体から成るものであるが、その具体的使用に際して
は、他のセメント用混和剤を併用することもできる。こ
のような他のセメント用混和剤としては、ＡＥ剤、凝結
遅延剤、防腐剤、防黴剤等がある。The cement dispersant according to the present invention is composed of the vinyl polymer described above, but other specific admixtures for cement may be used in combination in the specific use thereof. Such other cement admixtures include AE agents, setting retarders, antiseptics, antifungal agents and the like.
以下、本発明の構成及び効果をより具体的にするため、
本発明のビニル重合体の合成例、実施例等を挙げるが、
本発明はこれらの各例に限定されるものではない。Hereinafter, in order to make the configuration and effects of the present invention more specific,
Examples of the synthesis of the vinyl polymer of the present invention, examples, etc.,
The present invention is not limited to each of these examples.
〈合成例〉 アクリル酸４８部（重量部、以下同じ）、アクリル酸メ
チル６部及びビニルスルホネートの３０％水溶液（商品
名ゴルパノールＶＳ、ＢＡＳＦ社製）２０部を、温度
計、滴下ロート、窒素導入管及び攪拌機付きの四つ口フ
ラスコに仕込み、更に水２７８部を均一溶解し、直ちに
雰囲気を窒素置換した。次いで連鎖移動剤としてチオグ
リコール酸アンモニウムの５０％水溶液６．６部を投入
し、系の温度を温水浴にて６０℃に加温した。そして過
硫酸アンモニウムの６％水溶液４２部を滴下し、重合を
開始して、約５時間反応させ、重合を完結させた。つづ
いて水酸化ナトリウムの１０％水溶液２６６．７部で中
和し、ビニル重合体（実施例１−１）を得た。<Synthesis example> 48 parts of acrylic acid (parts by weight, the same applies hereinafter), 6 parts of methyl acrylate, and 20 parts of a 30% aqueous solution of vinyl sulfonate (trade name Golpanol VS, manufactured by BASF), a thermometer, a dropping funnel, and nitrogen introduction. It was charged into a four-necked flask equipped with a tube and a stirrer, 278 parts of water was further dissolved therein, and the atmosphere was immediately replaced with nitrogen. Then, 6.6 parts of a 50% aqueous solution of ammonium thioglycolate was added as a chain transfer agent, and the temperature of the system was heated to 60 ° C. in a warm water bath. Then, 42 parts of a 6% aqueous solution of ammonium persulfate was added dropwise to start the polymerization, and the reaction was carried out for about 5 hours to complete the polymerization. Subsequently, it was neutralized with 266.7 parts of a 10% aqueous solution of sodium hydroxide to obtain a vinyl polymer (Example 1-1).
以下、水を均一溶解した後の放置日数、用いたモノマー
成分の種類及び部を変え、同様にして、第１表及び第２
表記載のビニル重合体（実施例１−２〜比較例１０−
１）を得た。Hereinafter, the number of days left after uniform dissolution of water, the type and parts of the monomer components used were changed, and the same procedure as shown in Table 1 and 2
Vinyl polymers described in the table (Example 1-2 to Comparative Example 10-
1) was obtained.
〈試験方法〉 得られたビニル重合体等を各々使用し、次の条件及び方
法下にコンクリート試験を行なって、スランプ、その経
時変化（直後→６０分後）及び圧縮強度を測定した。<Test Method> Using each of the obtained vinyl polymers and the like, a concrete test was conducted under the following conditions and methods to measure the slump, its change with time (immediately after 60 minutes) and the compressive strength.
・条件；セメント（小野田社製普通ポルトランドセメン
ト）を３２０kg／m3、細骨材（大井川砂、比重２．６
２）を８８０kg／m3、粗骨材（鉢地山砕石、比重２．６
５）を９３２kg／m3、水（蒲郡市水）を１８２kg／m3。
またビニル重合体等（分散剤）を０．１５重量％（対セ
メント）。この使用量はビニル重合体を使用する各実施
例の目標スランプを２１cmとする量である。したがっ
て、ビニル重合体を使用しない比較例１１，１２につい
ては、各分散剤を同じ目標スランプとする適量（対セメ
ントでそれぞれ、０．２５重量％、０．３重量％）で使
用した。更にＡＥ剤（商品名チューポールＣ、竹本油脂
社製、アルキルサルフェートその他を含む）を適量使用
した（第１表及び第２表に記載）。この使用量は直後の
空気量を４〜６％とする量である。・ Conditions: 320 kg / m 3 of cement (ordinary Portland cement manufactured by Onoda Co., Ltd.), fine aggregate (Oikawa sand, specific gravity 2.6)
2) 880 kg / m 3 , coarse aggregate (Hachijiyama crushed stone, specific gravity 2.6
5) is 932 kg / m 3 and water (Gamagori City water) is 182 kg / m 3 .
In addition, 0.15% by weight of vinyl polymer and the like (dispersant) (against cement). This amount was used so that the target slump of each example using the vinyl polymer was 21 cm. Therefore, in Comparative Examples 11 and 12 in which the vinyl polymer was not used, each dispersant was used in an appropriate amount (0.25 wt% and 0.3 wt% with respect to cement, respectively) so as to have the same target slump. Further, an appropriate amount of an AE agent (trade name: Chupol C, manufactured by Takemoto Yushi Co., Ltd., including alkyl sulfate, etc.) was used (described in Tables 1 and 2). This usage amount is an amount that makes the immediately following air amount 4 to 6%.
・方法；全材料を傾胴ミキサーに投入後、３分間攪拌し
て均一状態とした直後にサンプリングした。引き続き、
低速(4r.p.m.)で６０分間攪拌してサンプリングした。
そして各サンプルについてスランプを測定した。また直
後のサンプルについて、１週及び４週後の圧縮強度を測
定した。-Method: All materials were put into a tilting mixer, and immediately after stirring for 3 minutes to make a uniform state, sampling was performed. Continuing,
Sampling was performed at low speed (4 rpm) for 60 minutes.
And the slump was measured about each sample. In addition, the compressive strength of the immediately following sample was measured after 1 week and 4 weeks.
〈実施例１−１〜７−３及び比較例１−１〜１−２〉 第１表記載の実施例１−１〜７−３及び第２表記載の比
較例１−１〜１２を各々調製し、前述の試験方法にした
がって各サンプルを測定した。結果を第３表及び第４表
に示した。<Examples 1-1 to 7-3 and Comparative Examples 1-1 to 1-2> Examples 1-1 to 7-3 described in Table 1 and Comparative Examples 1-1 to 12 described in Table 2 respectively. Each sample was prepared and measured according to the test method described above. The results are shown in Tables 3 and 4.
第１表及び第２表において、各構成単位の含有率はビニ
ル重合体を構成する全構成単位に対する重量％であり、
ＡＥ剤使用量はセメントに対する重量％である。また放
置日数は各構成単位を形成することとなるモノマー成分
を仕込み、更に水を均一溶解した後、雰囲気を窒素置換
するまでの間の放置日数である。そしてスランプ保持率
は下記の式によって算出した。In Tables 1 and 2, the content of each structural unit is% by weight based on all structural units constituting the vinyl polymer,
The amount of the AE agent used is% by weight with respect to the cement. The number of days left is the number of days left until the atmosphere is replaced with nitrogen after the monomer components that will form each structural unit are charged and the water is evenly dissolved. Then, the slump retention rate was calculated by the following formula.
スランプ保持率（％）＝（６０分後のスランプ／直後の
スランプ）×１００ 〈発明の効果〉 第４表に対する第３表の結果からも明らかなように、本
発明には、セメント粒子の分散性が大きく、またとりわ
け該分散性の経時変化が少なく、そしてかかる優れた諸
性能を持つものが工業上安定して得られるという効果が
ある。Slump retention rate (%) = (slump after 60 minutes / slump immediately after) × 100 <Effects of the Invention> As is clear from the results of Table 3 with respect to Table 4, in the present invention, the dispersibility of cement particles is large, and in particular, the dispersibility of the cement particles is small over time, and such excellent properties are obtained. There is an effect that a product having performance can be obtained industrially stably.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 24/26 Ｃ Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location C04B 24/26 CG
Claims (1)
及び下記式（II）で示される親水性の構成単位並びに下
記式（III）で示される疎水性の構成単位を含有する水
溶性或いは水分散性のビニル重合体であって、式（Ｉ）
で示される構成単位／式（II）で示される構成単位／式
（III）で示される構成単位＝５〜４０／９０〜４０／
５〜４０（各重量％）の割合で構成されるビニル重合体
から成ることを特徴とするセメント用分散剤。 ［但し、Ｒ１，Ｒ２，Ｒ３はＨ又はＣＨ３。Ｍ１，Ｍ２
はＨ、アルカリ金属、アルカリ土類金属又はアルカノー
ルアミン。ＸはＣＯＯＲ５（Ｒ５は炭素数１〜８のアル
キル基）、ＣＮ、Ｃ６Ｈ５又はＯＣＯＣＨ３。ｎは０又
は１。］1. A water-soluble composition containing a hydrophilic constitutional unit represented by the following formula (I), a hydrophilic constitutional unit represented by the following formula (II), and a hydrophobic constitutional unit represented by the following formula (III). A water-dispersible or vinyl-dispersible vinyl polymer of formula (I)
Structural unit represented by / structural unit represented by the formula (II) / structural unit represented by the formula (III) = 5 to 40/90 to 40 /
A dispersant for cement, which comprises a vinyl polymer composed of 5 to 40 (each weight%). [However, R 1 , R 2 , and R 3 are H or CH 3 . M 1 , M 2
Is H, alkali metal, alkaline earth metal or alkanolamine. X is COOR 5 (R 5 is an alkyl group having 1 to 8 carbon atoms), CN, C 6 H 5 or OCOCH 3 . n is 0 or 1. ]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5297886A JPH0617257B2 (en) | 1986-03-11 | 1986-03-11 | Dispersant for cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5297886A JPH0617257B2 (en) | 1986-03-11 | 1986-03-11 | Dispersant for cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62212252A JPS62212252A (en) | 1987-09-18 |
| JPH0617257B2 true JPH0617257B2 (en) | 1994-03-09 |
Family
ID=12929988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5297886A Expired - Lifetime JPH0617257B2 (en) | 1986-03-11 | 1986-03-11 | Dispersant for cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617257B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63162563A (en) * | 1986-12-25 | 1988-07-06 | 大日本インキ化学工業株式会社 | Cement dispersant |
| JPH01226757A (en) * | 1988-03-04 | 1989-09-11 | Takemoto Oil & Fat Co Ltd | Dispersing agent for cement |
| US5290357A (en) * | 1992-12-22 | 1994-03-01 | Halliburton Company | Acetone/formaldehyde/cyanide resins |
-
1986
- 1986-03-11 JP JP5297886A patent/JPH0617257B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62212252A (en) | 1987-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2628486B2 (en) | Dispersant for cement | |
| US5703174A (en) | Air controlling superplasticizers | |
| KR910006893B1 (en) | Cement dispersion agents method of producing same and method of providing fluidizing property to hydraulic cement compositions using same | |
| JP2811336B2 (en) | New cement dispersant | |
| JP2507280B2 (en) | Dispersant for cement | |
| JP3278391B2 (en) | Dispersant for cement | |
| JPH0192212A (en) | Improvement of organic compound | |
| JP2001011129A (en) | Polymer capable of dispersing multi-purpose cement for high-fluidity, high-strength concrete | |
| JP2012505812A (en) | Dynamic copolymers for maintaining workability of cementitious compositions | |
| US4968734A (en) | Cement admixture | |
| JP2003516300A (en) | Water-soluble air control agent for cementitious composition | |
| JPH028983B2 (en) | ||
| AU704079B2 (en) | Air controlling superplasticizers | |
| JP2507279B2 (en) | How to prevent blackening of the concrete surface | |
| JP2001294463A (en) | Powdery cement dispersant | |
| EP2292567A1 (en) | Dispersant for a hydraulic composite | |
| JPH0617257B2 (en) | Dispersant for cement | |
| JPH08113613A (en) | Cement additive | |
| JPH0952749A (en) | Admixture for high flowability concrete and concrete material containing the same | |
| JPS6230648A (en) | Dispersant for cement | |
| JP3375279B2 (en) | Dispersant for cement | |
| JPS62212253A (en) | Dispersant for cement | |
| JP3172747B2 (en) | Cement admixture | |
| JP2617903B2 (en) | Cement dispersant | |
| CN107337795B (en) | Cement-based material dispersant suitable for winter construction and preparation method thereof |