JPH0240623B2 - - Google Patents
Info
- Publication number
- JPH0240623B2 JPH0240623B2 JP57210821A JP21082182A JPH0240623B2 JP H0240623 B2 JPH0240623 B2 JP H0240623B2 JP 57210821 A JP57210821 A JP 57210821A JP 21082182 A JP21082182 A JP 21082182A JP H0240623 B2 JPH0240623 B2 JP H0240623B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- cement
- lower alkyl
- formula
- compound represented
- 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
- 239000000203 mixture Substances 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 13
- 239000011396 hydraulic cement Substances 0.000 claims description 11
- 125000000217 alkyl group Chemical group 0.000 claims description 8
- 238000009472 formulation Methods 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 5
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- -1 alkali metal salt Chemical class 0.000 claims description 2
- 125000001997 phenyl group Chemical class [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 1
- 239000004568 cement Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000004570 mortar (masonry) Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- ZZTCCAPMZLDHFM-UHFFFAOYSA-N ammonium thioglycolate Chemical compound [NH4+].[O-]C(=O)CS ZZTCCAPMZLDHFM-UHFFFAOYSA-N 0.000 description 1
- 229940075861 ammonium thioglycolate Drugs 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003823 mortar mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は水硬化セメント配合物用混和剤に関す
る。さらに詳しくは、セメントペースト、モルタ
ル、コンクリートなどの水硬化セメント配合物に
添加して、作業性を向上すると共に、その性質を
改善する水硬化セメント配合物用混和剤に関す
る。従来より、建築物を含む各種のセメント、モ
ルタルまたはコンクリート製品に代表される水硬
性セメント配合物は、セメント、細骨材、粗骨材
等を水で混練し、成型することにより得られる。
水硬性セメント配合物の性状は、もちろん使用
する原材料の品質に左右されるが、配合条件によ
つても工業的に有用な性状を保持出来る。即ち、
満足すべき水硬性セメント配合物を得るための最
も重要な配合条件の一つは、単位水量を出来るだ
け少なくして、原材料を混練りすることであるこ
とは良く知られており、これにより高強度でひび
われの少ない、しかも単位セメント量の減少によ
る経済性に優れた製品を得ることが出来る。
従来、この種の高性能減水剤組成物として、種
合のものが開発され、実用化されている。
例えば、メラミン−ホルマリン樹脂スルホン酸
塩、ポリカルボン酸塩、ナフタリンスルホン酸塩
ホルマリン高縮合物、ナフタリンスルホン酸−リ
グニンスルホン酸のホルマリン高縮合物塩等があ
げられるが、何れも一長一短であり、満足するも
のではない。
即ち、メラミン−ホルマリン樹脂スルホン酸塩
は、減水効果が低く、多量の添加を必要とし、経
済的に不利である。ポリカルボン酸塩もまた減水
効果が低い上に、添加量を増大すると著しい凝結
遅延をおこし、場合によつては硬化不足となる。
ナフタリンスルホン酸塩ホルマリン高縮合物
は、セメント分散剤として、優れた性能を有し、
減水効果が大きく、凝結遅延性も少なく、また空
気連行性も小さく、コンクリート二次製品に特に
適した混和剤であり、広く賞用されている。しか
しながら、これら現有の高性能減水剤の共通する
欠点として、モルタルあるいはコンクリートの流
動性の経時的低下が著しいことであり、特にナフ
タリンスルホン酸塩ホルマリン高縮合物は著しく
大きい。
従つて、高温時の夏季には、より作業性が劣り
取り扱いが制限される。
本発明者らは、これら問題点を解消すべく鋭意
研究の結果、高度の減水性能を有し、しかも上記
の欠点である流動性低下を、遅延作用をともなわ
なくして解消し、しかもポンプ圧送性を改良し、
本発明に到達したものである。即ち、
一般式
（ただし、式中R1、R2、R3は低級アルキル基ま
たはＨ）
で示される化合物を80〜20モル％、
一般式
（ただし、式中R4は低級アルキル基またはＨ、
Ｍはアルカリ金属塩またはＨ）
で示される化合物を20〜80％、
一般式
（ただし、式中R5は低級アルキル基またはＨ、
ＸはCN、COOR6またはベンゼン核、なお、R6
は低級アルキル基）
で示される化合物を０〜20モル％、
を共重合させて得られる分子量3000〜300000を有
する水溶性共重合体を主成分とすることを特徴と
する水硬性セメント配合物用混和剤を提供するも
のである。
前記一般式(1)、(2)および(3)で示される化合物を
共重合して得られる分子量3000〜300000を有する
水溶性共重合体の製造方法は、公知の方法によ
り、ラジカル開始剤の存在下または必要に応じて
重合調節剤の存在下で、前記一般式(1)、(2)で示さ
れる化合物または(3)で示される化合物を共重合す
ることによつて得られる。
一般式(1)、(2)および(3)で示される化合物の共重
合反応におけるモル％比率については、一般式(1)
および(2)で示される化合物のモル％比率が80〜
20：20〜80の範囲外の場合、減水性が低下し、流
動性の経時安定性が得られない。
また、一般式(3)で示される化合物のモル％が20
％を越えると重合体の水溶性が低下し、セメント
粒子の分散性が劣る。
本発明において使用する分子量3000〜300000の
範囲の水溶性共重合体において、分子量3000以下
の場合には、分散性があり、減水能も認められる
が、優れた流動性の経時安定性を得ることはでき
ない。また、分子量300000以上の場合、優れた分
散性を得ることはできず、凝集作用を呈する。本
発明水硬性セメント配合物用混和剤の添加量はセ
メントに対して、0.1〜2.0重量％の範囲で使用す
るのが好ましい。
0.1％以下では分散効果を発揮することができ
ない。また2.0％以上ではブリージングが大きい。
本発明において用いられるセメントは、各種ポ
ルトランドセメント、混合セメント、フライアツ
シユセメント、特殊セメント等であり、本発明水
硬性セメント配合物用混和剤の添加時期は、水溶
液の場合は、セメント配合物の練り混ぜ水に添加
しても良く、また練り混ぜ後に添加しても良い。
また、乾燥粉末品の場合はあらかじめセメント
あるいはセメント配合物とプレミツクスしても良
い。
本発明水硬性セメント配合物用混和剤の使用に
際して、必要に応じて硬化促進剤、遅延剤、AE
剤およびその他の減水剤を併用することは何ら構
わない。
本発明混和剤は、現在市販の高性能減水剤に比
較して、高度のセメント粒子分散効果、減水効果
を発揮し、しかも優れた流動性の経時安定性を有
し遅延作用をもたらさない。
また、本発明混和剤を配合することにより、モ
ルタルおよびコンクリートのポンプ圧送性が改善
され、作業性の向上がはかれる。
以下に本発明を実施例により具体的に説明す
る。（部、％は重量基準を示す。）
実施例 １
撹拌棒、温度計および窒素導入管を備えた２
のフラスコにアクリル酸151.2ｇ、水257.2ｇを仕
込む。水浴で冷却しながら30％の苛性ソーダ水溶
液279.6％を徐々に加える。
次にアクリルアミドの50％水溶液297.7ｇとチ
オグリコール酸アンモニウム13.7ｇを加え均一に
溶解する。
2.2−アゾビス（２−アミノジプロパン）塩酸
塩0.60ｇを加え、窒素を導入し、温度を40℃に調
節する。
重合が開始するとともに、温度の上昇が認めら
れ約20分後に温度は70℃となる。更に２時間この
温度に保ち、重合反応を続ける。
重合終了後、冷却し重合物を取り出す。
得られた重合物の分子量は粘度法で測定の結果
70000であつた。
なお、実施例１に準じて製造した水溶性重合物
および比較例重合物の下記モルタル試験方法に基
づいて行つた性能試験結果を表−２に示す。
モルタル試験方法
(1) モルタル配合を表−１に示す。
The present invention relates to admixtures for hydraulic cement formulations. More specifically, the present invention relates to an admixture for hydraulic cement formulations that is added to hydraulic cement formulations such as cement paste, mortar, and concrete to improve workability and properties. BACKGROUND ART Hydraulic cement mixtures, which are typified by various cement, mortar, and concrete products, including those for buildings, have conventionally been obtained by kneading cement, fine aggregate, coarse aggregate, etc. with water, and molding the mixture. The properties of a hydraulic cement compound naturally depend on the quality of the raw materials used, but industrially useful properties can also be maintained depending on the compounding conditions. That is,
It is well known that one of the most important mixing conditions for obtaining a satisfactory hydraulic cement mixture is to knead the raw materials using as little unit water as possible. It is possible to obtain a product that is strong and has little cracking, and is also highly economical due to the reduction in the amount of cement per unit. Hitherto, various types of high performance water reducing agent compositions of this type have been developed and put into practical use. Examples include melamine-formalin resin sulfonate, polycarboxylate, naphthalene sulfonate formalin high condensate, naphthalene sulfonic acid-lignin sulfonic acid formalin high condensate salt, etc., but all of them have advantages and disadvantages and are satisfactory. It's not something you do. That is, melamine-formalin resin sulfonate has a low water-reducing effect, requires addition of a large amount, and is economically disadvantageous. Polycarboxylic acid salts also have a low water-reducing effect, and when the amount added is increased, a significant delay in setting occurs, resulting in insufficient curing in some cases. Naphthalene sulfonate formalin high condensate has excellent performance as a cement dispersant,
It has a large water-reducing effect, low setting retardation, and low air entrainment, making it a particularly suitable admixture for secondary concrete products, and is widely used. However, a common drawback of these existing high-performance water reducing agents is that the fluidity of mortar or concrete deteriorates significantly over time, and naphthalene sulfonate-formalin high condensates in particular significantly reduce the fluidity over time. Therefore, in the summer when the temperature is high, workability is lower and handling is restricted. As a result of intensive research to solve these problems, the present inventors have found that they have a high level of water reduction performance, eliminate the above-mentioned disadvantage of reduced fluidity without causing any retardation effect, and are easy to pump. improved,
This has led to the present invention. That is, the general formula (However, in the formula, R 1 , R 2 , and R 3 are lower alkyl groups or H) 80 to 20 mol% of the compound represented by the general formula (However, in the formula, R 4 is a lower alkyl group or H,
M is an alkali metal salt or H) 20 to 80% of the compound represented by the general formula (However, in the formula, R 5 is a lower alkyl group or H,
X is CN, COOR 6 or benzene nucleus, R 6
For use in hydraulic cement formulations, characterized in that the main component is a water-soluble copolymer having a molecular weight of 3,000 to 300,000 obtained by copolymerizing 0 to 20 mol% of a compound represented by (lower alkyl group) It provides an admixture. A method for producing a water-soluble copolymer having a molecular weight of 3,000 to 300,000 obtained by copolymerizing the compounds represented by the general formulas (1), (2), and (3) is performed by adding a radical initiator by a known method. It can be obtained by copolymerizing the compounds represented by the general formulas (1) and (2) or the compound represented by (3) in the presence or, if necessary, in the presence of a polymerization regulator. Regarding the molar percentage ratio in the copolymerization reaction of compounds represented by general formulas (1), (2), and (3), general formula (1)
And the mole% ratio of the compound shown in (2) is 80~
If the ratio is outside the range of 20:20 to 80, the water reducing property will decrease and stability of fluidity over time will not be obtained. In addition, the mol% of the compound represented by general formula (3) is 20
%, the water solubility of the polymer decreases and the dispersibility of cement particles becomes poor. In the water-soluble copolymer with a molecular weight in the range of 3,000 to 300,000 used in the present invention, if the molecular weight is 3,000 or less, it has dispersibility and water reduction ability, but it is difficult to obtain excellent fluidity and stability over time. I can't. In addition, when the molecular weight is 300,000 or more, excellent dispersibility cannot be obtained and aggregation occurs. The amount of the admixture for the hydraulic cement composition of the present invention is preferably in the range of 0.1 to 2.0% by weight based on the cement. If it is less than 0.1%, the dispersion effect cannot be exhibited. Moreover, breathing is large at 2.0% or more. The cement used in the present invention is various Portland cements, mixed cements, fly-ash cements, special cements, etc., and the timing of adding the admixture for the hydraulic cement mixture of the present invention is, in the case of an aqueous solution, when mixing the cement mixture. It may be added to the mixing water or after kneading and mixing. In the case of a dry powder product, it may be premixed with cement or a cement mixture. When using the admixture for hydraulic cement formulations of the present invention, curing accelerators, retarders, AE
There is no problem in using the water-reducing agent and other water-reducing agents together. The admixture of the present invention exhibits a higher degree of cement particle dispersion effect and water reduction effect than the currently commercially available high-performance water reducing agents, and also has excellent fluidity stability over time and does not cause a retarding effect. Furthermore, by blending the admixture of the present invention, the pumpability of mortar and concrete is improved, and workability is improved. The present invention will be specifically explained below using examples. (Parts and % are based on weight.) Example 1 2 Equipped with a stirring bar, thermometer and nitrogen inlet tube
Pour 151.2 g of acrylic acid and 257.2 g of water into a flask. Gradually add 30% caustic soda solution 279.6% while cooling in a water bath. Next, 297.7 g of a 50% aqueous solution of acrylamide and 13.7 g of ammonium thioglycolate were added and uniformly dissolved. Add 0.60 g of 2.2-azobis(2-aminodipropane) hydrochloride, introduce nitrogen and adjust the temperature to 40°C. As polymerization begins, a rise in temperature is observed, and the temperature reaches 70°C after about 20 minutes. The temperature is maintained for an additional 2 hours to continue the polymerization reaction. After the polymerization is completed, it is cooled and the polymerized product is taken out. The molecular weight of the obtained polymer was measured using the viscosity method.
It was 70,000. Table 2 shows the performance test results of the water-soluble polymer produced according to Example 1 and the comparative polymer according to the mortar test method described below. Mortar test method (1) The mortar composition is shown in Table-1.
【表】
(2) モルタル練りまぜ
ASTMC−305−65による
(3) Ｊロート値の測定
土木学会規定のＪロート（吐出口径10mm）を
使用して練り上り直後と各経時のモルタル流下
時間を測定した。なお、測定時以外はモルタル
ミキサー中で低速撹拌を続けた。
(4) 空気量の測定
ASTMC−185−59による。
(5) 圧縮強度
JISR5201による。[Table] (2) Mortar mixing according to ASTMC-305-65 (3) Measurement of J-funnel value Using a J-funnel (discharge port diameter 10 mm) specified by the Japan Society of Civil Engineers, measure the mortar flow time immediately after mixing and at each time. did. Note that low-speed stirring was continued in the mortar mixer except during measurement. (4) Measurement of air volume According to ASTMC-185-59. (5) Compressive strength According to JISR5201.
【表】
表−２から明らかな如く、本発明品を使用する
ことにより、市販品よりも初期流動性、即ち減水
性に優れており、しかも経時安定性が著しく優れ
ている。
また、空気連行性、圧縮強度においても異常は
見られず、極めて優れた高性能混和剤といえる。
一方、比較品の単独重合体および分子量50万の
共重合体組成物はセメント粒子の分散性が全くな
く、セメント混和剤としては使用出来ない。[Table] As is clear from Table 2, by using the product of the present invention, it is superior to commercially available products in initial fluidity, that is, in water reduction properties, and is also significantly superior in stability over time. Furthermore, no abnormalities were observed in air entrainment or compressive strength, and it can be said to be an extremely high-performance admixture. On the other hand, the comparative homopolymer and copolymer compositions with a molecular weight of 500,000 have no dispersibility of cement particles at all and cannot be used as cement admixtures.
Claims (1)
たはＨ） で示される化合物を80〜20モル％、 一般式 （ただし、式中R4は低級アルキル基またはＨ、
Ｍはアルカリ金属塩またはＨ） で示される化合物を20〜80％、 一般式 （ただし、式中R5は低級アルキル基またはＨ、
ＸはCN、COOR6またはベンゼン核、なお、R6
は低級アルキル基） で示される化合物を０〜20モル％、 を共重合させて得られる分子量3000〜300000を有
する水溶性共重合体を主成分とすることを特徴と
する水硬性セメント配合物用混和剤。[Claims] 1. General formula (However, in the formula, R 1 , R 2 , and R 3 are lower alkyl groups or H) 80 to 20 mol% of the compound represented by the general formula (However, in the formula, R 4 is a lower alkyl group or H,
M is an alkali metal salt or H) 20 to 80% of the compound represented by the general formula (However, in the formula, R 5 is a lower alkyl group or H,
X is CN, COOR 6 or benzene nucleus, R 6
For use in hydraulic cement formulations, characterized in that the main component is a water-soluble copolymer having a molecular weight of 3,000 to 300,000 obtained by copolymerizing 0 to 20 mol% of a compound represented by (lower alkyl group) Admixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21082182A JPS59102853A (en) | 1982-11-30 | 1982-11-30 | Admixing agent for hydraulic cement blend |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21082182A JPS59102853A (en) | 1982-11-30 | 1982-11-30 | Admixing agent for hydraulic cement blend |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59102853A JPS59102853A (en) | 1984-06-14 |
| JPH0240623B2 true JPH0240623B2 (en) | 1990-09-12 |
Family
ID=16595674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21082182A Granted JPS59102853A (en) | 1982-11-30 | 1982-11-30 | Admixing agent for hydraulic cement blend |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59102853A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0426117U (en) * | 1990-06-26 | 1992-03-02 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6054957A (en) * | 1983-09-05 | 1985-03-29 | 鹿島建設株式会社 | Slump reduction preventing agent for hydraulic cement blend |
| JPS61183157A (en) * | 1985-02-08 | 1986-08-15 | 花王株式会社 | Cement additive |
| CA1325863C (en) * | 1986-04-03 | 1994-01-04 | National Starch And Chemical Corporation | Cementiferous compositions and additives for use in such compositions |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830330A (en) * | 1971-08-20 | 1973-04-21 | ||
| JPS5233646A (en) * | 1975-08-30 | 1977-03-14 | Hoechst Ag | Production of 11aminobenzoll 44 and 55betaasulfatoethyl sulfonee22sulphonic acid and corresponding hydroxyethyl sulfone and vynyl sulfone compound |
| JPS5615744A (en) * | 1979-07-20 | 1981-02-16 | Kao Corp | Packing material for sanitary napkin and its manufacture |
-
1982
- 1982-11-30 JP JP21082182A patent/JPS59102853A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830330A (en) * | 1971-08-20 | 1973-04-21 | ||
| JPS5233646A (en) * | 1975-08-30 | 1977-03-14 | Hoechst Ag | Production of 11aminobenzoll 44 and 55betaasulfatoethyl sulfonee22sulphonic acid and corresponding hydroxyethyl sulfone and vynyl sulfone compound |
| JPS5615744A (en) * | 1979-07-20 | 1981-02-16 | Kao Corp | Packing material for sanitary napkin and its manufacture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0426117U (en) * | 1990-06-26 | 1992-03-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59102853A (en) | 1984-06-14 |
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