JPH0714829B2 - Method for producing dry powder containing hardly volatile organic compound - Google Patents
Method for producing dry powder containing hardly volatile organic compoundInfo
- Publication number
- JPH0714829B2 JPH0714829B2 JP60177413A JP17741385A JPH0714829B2 JP H0714829 B2 JPH0714829 B2 JP H0714829B2 JP 60177413 A JP60177413 A JP 60177413A JP 17741385 A JP17741385 A JP 17741385A JP H0714829 B2 JPH0714829 B2 JP H0714829B2
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- JP
- Japan
- Prior art keywords
- organic compound
- volatile organic
- dry powder
- hardly volatile
- aqueous solution
- 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.)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はセメント混和剤などとして主として用いられる
難揮発性有機化合物を含む乾燥粉末の製造方法に関し、
さらに詳しくは水溶液状態にある難揮発性有機化合物と
生石灰とを混合することによって、この難揮発性有機化
合物を含む乾燥粉末を効率よく製造するための方法に関
する。TECHNICAL FIELD The present invention relates to a method for producing a dry powder containing a hardly volatile organic compound mainly used as a cement admixture,
More specifically, it relates to a method for efficiently producing a dry powder containing this hardly volatile organic compound by mixing the hardly volatile organic compound in an aqueous solution state with quicklime.
発明の技術的背景ならびにその問題点 ポルトランドセメントに代表されるセメントは、建設業
界を中心として広く用いられており、このセメントには
種々の目的で有機化合物であるセメント混和剤が添加さ
れることがある。このようなセメント混和剤としては、
減水剤、分散剤、凝結遅延剤、空気連行剤、起泡剤、増
粘剤、保水剤などが用いられている。Technical background of the invention and its problems Cement represented by Portland cement is widely used mainly in the construction industry, and cement admixture which is an organic compound may be added to this cement for various purposes. is there. As such a cement admixture,
Water reducing agents, dispersants, setting retarders, air entrainers, foaming agents, thickeners, water retention agents and the like are used.
これらのセメント混和剤は、有機化合物塩あるいは有機
酸などの形態であることが多く、したがって水溶液の状
態として製造されることが多い。ところでこれらのセメ
ント混和剤は、水溶液の状態で直接セメントに添加され
ることもあるが、水溶液状態のセメント混和剤は、その
取扱いが必ずしも容易ではないことがあるため、乾燥粉
末状態のセメント混和剤が求められることがある。These cement admixtures are often in the form of organic compound salts or organic acids, and thus are often manufactured in the form of an aqueous solution. By the way, although these cement admixtures may be directly added to cement in the form of an aqueous solution, the cement admixture in an aqueous solution may not always be easy to handle. May be required.
従来セメント混和剤として用いられる難揮発性有機化合
物の乾燥粉末を製造するには、該有機化合物の水溶液を
各種ドライヤーたとえばスプレードライヤー、ドラムド
ライヤーなどによって乾燥し、次いで必要に応じて粉砕
するという方法がとられている。しかしながらこれらの
ドライヤーを利用する方法では、設備設置に際して多額
の費用を必要とする上、乾燥のために膨大な熱エネルギ
ーを必要とするという問題点があった。In order to produce a dry powder of a hardly volatile organic compound which has been conventionally used as a cement admixture, a method of drying an aqueous solution of the organic compound by various dryers such as a spray dryer and a drum dryer, and then pulverizing it if necessary is used. It is taken. However, the method using these dryers has a problem that a large amount of cost is required for installation of equipment and enormous heat energy is required for drying.
そこで本発明者らは、このような問題点を解決すべく鋭
意研究したところ、セメント混和剤などとして用いられ
る難揮発性有機化合物の水溶液と生石灰とを特定の方法
で混合して、生石灰と水との水和反応およびその際発生
する熱を利用すると、難揮発性有機化合物を含む乾燥粉
末が効率よく取得しうること、および生石灰の水和によ
って生ずる消石灰が含まれた難揮発性有機化合物の乾燥
粉末は、セメント混和剤として用いた場合に、難揮発性
有機化合物のみからなる乾燥粉末を用いた場合と比較し
てセメント混和剤としての性能に何らの遜色がないこと
を見出し、この知見に基いて本発明を完成するに至っ
た。Therefore, the inventors of the present invention have conducted intensive studies to solve such problems, and mixed an aqueous solution of a hardly volatile organic compound used as a cement admixture and quick lime by a specific method to obtain quick lime and water. By utilizing the hydration reaction with and the heat generated at that time, it is possible to efficiently obtain a dry powder containing a hardly volatile organic compound, and of the volatile slaked lime-containing hardly volatile organic compound produced by hydration of quicklime. The dry powder, when used as a cement admixture, found that there was no difference in the performance as a cement admixture compared with the case of using a dry powder consisting of only a hardly volatile organic compound, and based on this finding Based on this, the present invention has been completed.
発明の目的 本発明は、上記のような従来技術に伴なう問題点をを解
決しようとするものであり、セメント混和剤などとして
用いられる難揮発性有機化合物の乾燥粉末を、大規模な
設備投資をすることなく、しかも乾燥に際して多大な熱
エネルギーを必要とせずに製造しうる方法を提供するこ
とを目的としている。OBJECT OF THE INVENTION The present invention is intended to solve the problems associated with the prior art as described above, and to provide a dry powder of a hardly volatile organic compound used as a cement admixture in a large-scale facility. It is an object of the present invention to provide a method which can be manufactured without investment and without requiring a large amount of heat energy for drying.
発明の概要 本発明に係る難揮発性有機化合物を含む乾燥粉末の製造
方法は、難揮発性有機化合物の水溶液に該水溶液中の水
分量100重量部に対して粉末状あるいは顆粒状の生石灰1
75〜300重量部を連続的に添加混合し、温度を200℃以下
に保ちながら、生石灰の水和反応とこの反応に際して発
生する熱とを利用して水分を除去することによって、難
揮発性有機化合物と消石灰とを含み、含水率が10重量％
以下の乾燥粉末を得ることを特徴としている。SUMMARY OF THE INVENTION A method for producing a dry powder containing a hardly volatile organic compound according to the present invention is an aqueous solution of a hardly volatile organic compound, and powdered or granular quicklime 1 per 100 parts by weight of water in the aqueous solution 1
75 to 300 parts by weight are continuously added and mixed, and while keeping the temperature at 200 ° C or lower, the moisture is removed by utilizing the hydration reaction of quicklime and the heat generated during this reaction, thereby refractory organic Containing compound and slaked lime, water content is 10% by weight
It is characterized in that the following dry powder is obtained.
本発明に係るセメント混和剤などとして主に用いられる
難揮発性有機化合物を含む乾燥粉末の製造方法によれ
ば、上記のような方法で難揮発性有機化合物の水溶液と
生石灰とを混合することにより、難揮発性有機化合物と
消石灰とを含む乾燥粉末が得られるため、大規模な設備
投資をすることなく、かつ乾燥に際して多大な熱エネル
ギーを必要としない。しかもこの乾燥粉末を減水剤、分
散剤、凝結遅延剤、起泡剤などのセメント混和剤として
用いた場合に、難揮発性有機化合物のみからなる乾燥粉
末をセメント混和剤として用いた場合に比較して、セメ
ント混和剤としての性能には何ら遜色がない。According to the method for producing a dry powder containing a hardly volatile organic compound mainly used as a cement admixture according to the present invention, by mixing the aqueous solution of the hardly volatile organic compound and quick lime by the above method. Since a dry powder containing a hardly volatile organic compound and slaked lime can be obtained, large-scale capital investment is not required and a great amount of heat energy is not required for drying. Moreover, when this dry powder was used as a cement admixture such as a water reducing agent, a dispersant, a set retarder, and a foaming agent, a comparison was made when dry powder consisting only of a non-volatile organic compound was used as a cement admixture. Therefore, the performance as a cement admixture is comparable.
発明の具体的説明 以下に本発明をより詳細に説明する。DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in more detail below.
本発明で用いられる難揮発性有機化合物は、主にセメン
ト混和剤などとして用いられ、製造時に水溶液の状態で
得られ、したがって水に可溶である。またこの有機化合
物は、この水溶液に生石灰を添加し、この際発生する水
和反応熱により水分を蒸発除去する際に、揮発されにく
いという難揮発性あるいは非揮発性という性質を有して
いる。しかもこの難揮発性有機化合物は、混合された生
石灰が水と反応して生ずる消石灰が共存しても、セメン
ト混和剤などとしての性能が損なわれないものであるこ
とが好ましい。The hardly volatile organic compound used in the present invention is mainly used as a cement admixture, etc., and is obtained in the state of an aqueous solution at the time of production, and is therefore soluble in water. In addition, this organic compound has a property of being hardly volatile or non-volatile, in that quick lime is not easily volatilized when quicklime is added to this aqueous solution and water is evaporated and removed by heat of hydration reaction generated at this time. Moreover, it is preferable that the hardly volatile organic compound does not impair the performance as a cement admixture even when slaked lime produced by the reaction of mixed quick lime with water coexists.
このようなセメント混和剤などとしての難揮発性有機化
合物としては、セメント減水剤、セメント分散剤、凝結
遅延剤、空気連行剤、起泡剤、消泡剤、増粘剤、保水剤
などとして用いられる有機化合物が挙げられる。具体的
には、たとえばオレフィン不飽和カルボン酸共重合体
塩、不飽和カルボン酸重合体塩、リグニンスルホン酸
塩、ナフタレンスルホン酸塩−ホルマリン縮合物、グル
コン酸、２−ケトグルコン酸、グルコヘプトン酸、ポリ
オキシエチレンアルキルエーテル硫酸塩、ポリオキシエ
チレンアルキルエーテル、ロジン酸塩、メチルセルロー
ス、カルボキシメチルセルロース、ポリアクリルアミ
ド、ポリエチレンオキシドなどが例示される。As such a non-volatile organic compound as a cement admixture, it is used as a cement water reducing agent, a cement dispersant, a setting retarder, an air entraining agent, a foaming agent, a defoaming agent, a thickener, a water retention agent, etc. Organic compounds that can be used. Specifically, for example, olefin unsaturated carboxylic acid copolymer salt, unsaturated carboxylic acid polymer salt, lignin sulfonate, naphthalene sulfonate-formalin condensate, gluconic acid, 2-ketogluconic acid, glucoheptonic acid, poly Examples thereof include oxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether, rosin acid salt, methyl cellulose, carboxymethyl cellulose, polyacrylamide and polyethylene oxide.
一方本発明で用いられる生石灰は、酸化カルシウムの慣
用名であり、工業用生石灰あるいは消石灰製造原料用生
石灰などが用いられるが、これらに特に限定されるもの
ではない。この生石灰は、上記の難揮発性有機化合物の
水溶液への混合時の取扱い容易性から、その形状は粉末
状あるいは顆粒状であることが好ましい。On the other hand, quicklime used in the present invention is a common name of calcium oxide, and industrial quicklime or quicklime for raw materials for producing slaked lime is used, but the quicklime is not particularly limited thereto. The quicklime is preferably in the form of powder or granules because of the ease of handling when mixing the above-mentioned hardly volatile organic compound into an aqueous solution.
本発明では、このような生石灰が水溶液の状態にあるセ
メント混和剤などとしての難揮発性有機化合物に添加混
合され、生石灰自身は水和反応により消石灰となり、こ
の際水分が吸収され、しかもこの水和反応時に発生する
熱によって水分が蒸発せしめられる。このように、本発
明ではセメント混和剤などとしての難揮発性有機化合物
を溶解している水分は、生石灰が消石灰に変換される際
に吸収されるとともに、この反応に際して発生する熱に
よって蒸発せしめられる。したがって難揮発性有機化合
物の水溶液に添加混合される生石灰の量は、該水溶液中
に存在する水分量に応じて決定される。具体的には、該
水溶液に添加混合すべき生石灰の量を変化させた簡単な
予備実験を行なうことにより容易に添加混合すべき生石
灰の量を決定できる。たとえばC5オレフィン−マレイン
酸共重合体ナトリウム塩の40重量％水溶液に生石灰を添
加混合して乾燥粉末を得る場合には、該水溶液100重量
部に生石灰を105〜180重量部程度添加すればよい。すな
わち、難揮発性有機化合物の水溶液中の水分量100重量
部に対して粉末状あるいは顆粒状の生石灰175〜300重量
部を添加すればよい。In the present invention, such quick lime is added and mixed with a hardly volatile organic compound such as a cement admixture in the state of an aqueous solution, and quick lime itself becomes slaked lime by a hydration reaction, at which time water is absorbed, and this water Moisture is evaporated by the heat generated during the reaction. As described above, in the present invention, the water that dissolves the hardly volatile organic compound as the cement admixture is absorbed when quicklime is converted into slaked lime, and is evaporated by the heat generated during this reaction. . Therefore, the amount of quicklime added to and mixed with the aqueous solution of the hardly volatile organic compound is determined according to the amount of water present in the aqueous solution. Specifically, the amount of quick lime to be added and mixed can be easily determined by performing a simple preliminary experiment in which the amount of quick lime to be added and mixed to the aqueous solution is changed. For example, when quick lime is added to and mixed with a 40 wt% aqueous solution of C 5 olefin-maleic acid sodium salt to obtain a dry powder, about 105 to 180 parts by weight of quick lime may be added to 100 parts by weight of the aqueous solution. . That is, 175 to 300 parts by weight of powdered or granular quicklime may be added to 100 parts by weight of water in the aqueous solution of the hardly volatile organic compound.
添加混合する生石灰の量が水分量に対して多すぎる場合
には、発熱量が多くなりすぎて系内温度が極度に上昇し
て前記有機化合物の分解が生じたり、さらには去水和生
石灰が系内に残存して、得られた難揮発性有機化合物を
含む乾燥粉末が水分と接触した際に発熱することがある
という問題点がある。一方添加混合すべき生石灰の量が
水分量に対して少なすぎる場合には、水分の蒸発が不充
分であり満足な乾燥粉末が得られない。If the amount of quick lime to be added and mixed is too large with respect to the amount of water, the calorific value becomes too high and the temperature in the system extremely rises to cause decomposition of the organic compound, and further the dehydrated quick lime is There is a problem that the dried powder containing the hardly volatile organic compound obtained, which remains in the system, may generate heat when it comes into contact with water. On the other hand, when the amount of quicklime to be added and mixed is too small with respect to the amount of water, the evaporation of water is insufficient and a satisfactory dry powder cannot be obtained.
難揮発性有機化合物の水溶液に生石灰を添加混合するに
際して、急激に生石灰を添加混合したり、あるいは攪拌
が不充分であると発熱反応が急激に進行し系内の温度が
上昇しすぎて該有機化合物が分解することがある。この
ため生石灰の添加混合に際しては、冷却あるいは加熱装
置を有する混合機たとえばパドルミキサーなどを使用し
て充分に混合しながら、系内の温度を200℃以下に保ち
ながら添加混合する。またこのような難揮発性有機化合
物と生石灰との混合は、連続式で行われる。When quick lime is added to and mixed with an aqueous solution of a hardly volatile organic compound, or when quick lime is added and mixed, or if stirring is insufficient, an exothermic reaction proceeds rapidly and the temperature in the system rises too much. The compound may decompose. Therefore, when adding and mixing quick lime, a mixer having a cooling or heating device, such as a paddle mixer, is used for sufficient mixing, and the temperature in the system is maintained at 200 ° C. or lower. The mixing of such a hardly volatile organic compound and quick lime is carried out in a continuous manner.
得られる乾燥粉末は、セメント混和剤としての難揮発性
有機化合物と消石灰とを主に含んでいるが、この乾燥粉
末の含水率は10重量％以下である。このような乾燥粉末
は、そのまま粉末として使用しうるが、必要に応じて粉
砕を行なうことによってさらに微粉化することもでき
る。The obtained dry powder mainly contains a hardly volatile organic compound as a cement admixture and slaked lime, and the water content of this dry powder is 10% by weight or less. Such a dry powder can be used as it is as a powder, but it can be further pulverized by pulverizing if necessary.
発明の効果 本発明に係るセメント混和剤などとして主に用いられる
難揮発性有機化合物を含む乾燥粉末の製造方法によれ
ば、上記のような方法で難揮発性有機化合物の水溶液と
生石灰とを混合することにより難揮発性有機化合物と消
石灰とを含む乾燥粉末が得られるため、大規模な設備投
資をすることなく、かつ乾燥に際して多大な熱エネルギ
ーを必要としない。しかもこの乾燥粉末をセメント減水
剤、分散剤、凝結遅延剤、起泡剤などのセメント混和剤
として用いた場合に、難揮発性有機化合物のみからなる
乾燥粉末をセメント混和剤として用いた場合に比較し
て、セメント混和剤としての性能には何ら遜色がない。Effects of the Invention According to the method for producing a dry powder containing a hardly volatile organic compound that is mainly used as a cement admixture according to the present invention, an aqueous solution of a hardly volatile organic compound and quick lime are mixed by the method as described above. By doing so, a dry powder containing a hardly volatile organic compound and slaked lime can be obtained, so that large-scale capital investment is not required and a great amount of heat energy is not required for drying. Moreover, when this dry powder was used as a cement admixture such as a cement water reducing agent, a dispersant, a set retarder, and a foaming agent, a comparison was made when a dry powder consisting of only non-volatile organic compounds was used as a cement admixture. And, the performance as a cement admixture is comparable.
以下本発明を実施例により説明するが、本発明はこれら
実施例に限定されるものではない。なお以下の説明にお
いて、「部」および「％」はとくに断りのないかぎり重
量基準である。The present invention will be described below with reference to examples, but the present invention is not limited to these examples. In the following description, "part" and "%" are based on weight unless otherwise specified.
実施例 １ セメント混和剤である難揮発性有機化合物として、表１
に示す種々の化合物の水溶液を用いた。Example 1 Table 1 shows non-volatile organic compounds as cement admixtures.
Aqueous solutions of various compounds shown in were used.
まずステンレス製ビーカーに表１に示す難揮発性有機化
合物の水溶液を所定量仕込み、60℃の湯浴中で生石灰12
0gを入れ撹拌を続けた。熱電対式温度計にて系内の温度
を測定して発熱までの時間（分）および系内の最大温度
（℃）を測定した。また混合時の系内の状態および得ら
れた乾燥粉末の含水率ならびにその外観を観察した。結
果を表２に示す。 First, a stainless beaker was charged with a predetermined amount of an aqueous solution of a non-volatile organic compound shown in Table 1, and quicklime 12 was added in a hot water bath at 60 ° C.
0 g was added and stirring was continued. The temperature in the system was measured with a thermocouple thermometer to measure the time (minutes) until heat generation and the maximum temperature (° C) in the system. In addition, the state of the system during mixing, the water content of the obtained dry powder and the appearance thereof were observed. The results are shown in Table 2.
表２より、本発明によればセメント混和剤としての難揮
発性有機化合物に生石灰を添加混合することにより、ド
ライヤーなどの乾燥装置を用いることなく容易に乾燥粉
末を製造することができることがわかる。 From Table 2, it can be seen that according to the present invention, by adding and mixing quick lime to the hardly volatile organic compound as a cement admixture, a dry powder can be easily produced without using a drying device such as a dryer.
実施例 ２ 実施例１で得られたC5オレフィン−マレイン酸共重合体
Na塩（試料No.1）およびナフタレンスルホン酸Na−ホル
マリン縮合物（試料No.2）を含む乾燥粉末を、セメント
分散剤として用いた。Example 2 C 5 olefin-maleic acid copolymer obtained in Example 1
A dry powder containing Na salt (Sample No. 1) and naphthalenesulfonic acid Na-formalin condensate (Sample No. 2) was used as a cement dispersant.
普通ポルトランドセメント2000gと、水1000gと、上記有
機化合物を含む乾燥粉末を該有機化合物に換算した重量
で、普通ポルトランドセメント量の0.2％に相当する量
である4gとを混合攪拌してセメントスラリーを作成し、
JIS R5201によるフローテーブルで該スラリーの流動性
を測定した。2000 g of ordinary Portland cement, 1000 g of water, and 4 g, which is a dry powder containing the above organic compound in terms of the weight converted to the organic compound, which is an amount corresponding to 0.2% of the amount of ordinary Portland cement, are mixed and stirred to form a cement slurry. make,
The fluidity of the slurry was measured with a flow table according to JIS R5201.
対照試験として、上記の有機化合物の水溶液を生石灰を
用いることなく、100℃の乾燥機に入れて水分を蒸発さ
せることにより得られた乾燥粉末を、セメント分散剤と
して用いた。表３にスラリーの流動性を示す。As a control test, a dry powder obtained by placing the above aqueous solution of an organic compound in a dryer at 100 ° C. to evaporate water without using quicklime was used as a cement dispersant. Table 3 shows the fluidity of the slurry.
表３より、セメント分散剤である難揮発性有機化合物の
水溶液に生石灰を添加混合して生石灰の水和反応および
その際に発生する熱によって水分を除去して得られた乾
燥粉末をセメント分散剤として用いた場合には、ドライ
ヤーによる乾燥により得られた難揮発性有機化合物の乾
燥粉末をセメント分散剤として用いた場合と比較して、
セメント分散剤としての性能には差がないことがわか
る。 From Table 3, dry powder obtained by adding and mixing quick lime to an aqueous solution of a refractory organic compound which is a cement dispersant and removing water by hydration reaction of quick lime and heat generated at that time is a cement dispersant. When used as, as compared with the case of using a dry powder of a hardly volatile organic compound obtained by drying with a dryer as a cement dispersant,
It can be seen that there is no difference in performance as a cement dispersant.
Claims (1)
の水分量100重量部に対して粉末状あるいは顆粒状の生
石灰175〜300重量部を連続的に添加混合し、温度を200
℃以下に保ちながら、生石灰の水和反応とこの反応に際
して発生する熱とを利用して水分を除去することによっ
て、難揮発性有機化合物と消石灰とを含み、含水率が10
重量％以下の乾燥粉末を得ることを特徴とする、難揮発
性有機化合物を含む乾燥粉末の製造方法。1. 175 to 300 parts by weight of powdered or granular quicklime is continuously added to and mixed with an aqueous solution of a hardly volatile organic compound with respect to 100 parts by weight of water in the aqueous solution.
While keeping the temperature below ℃, by removing the water by utilizing the hydration reaction of quick lime and the heat generated during this reaction, containing a hardly volatile organic compound and slaked lime, the water content is 10
A method for producing a dry powder containing a hardly volatile organic compound, which comprises obtaining a dry powder in an amount of not more than wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177413A JPH0714829B2 (en) | 1985-08-12 | 1985-08-12 | Method for producing dry powder containing hardly volatile organic compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177413A JPH0714829B2 (en) | 1985-08-12 | 1985-08-12 | Method for producing dry powder containing hardly volatile organic compound |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6241743A JPS6241743A (en) | 1987-02-23 |
| JPH0714829B2 true JPH0714829B2 (en) | 1995-02-22 |
Family
ID=16030489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60177413A Expired - Lifetime JPH0714829B2 (en) | 1985-08-12 | 1985-08-12 | Method for producing dry powder containing hardly volatile organic compound |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0714829B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000032534A1 (en) * | 1998-11-30 | 2000-06-08 | Taiheiyo Cement Corporation | Process for producing dispersant for powdery hydraulic composition |
| JP2002536289A (en) * | 1999-02-10 | 2002-10-29 | デグサ コンストラクション ケミカルズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Powdered polymer composition based on polyether carboxylate |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0764607B2 (en) * | 1988-12-16 | 1995-07-12 | 日本セメント株式会社 | Shrinkage reduction cement additive |
| JPH0461716U (en) * | 1990-09-28 | 1992-05-27 | ||
| US5573587A (en) * | 1994-06-14 | 1996-11-12 | Haden Schweitzer Corporation | Process for producing building materials from paint sludge |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5319848A (en) * | 1976-08-06 | 1978-02-23 | Seiko Epson Corp | Panel glass for liquid crystal display |
| JPS5756359A (en) * | 1980-09-17 | 1982-04-03 | Kao Corp | Manufacture of cement admixing agent |
| JPS5754460A (en) * | 1980-09-17 | 1982-03-31 | Fujitsu Ltd | Detecting and processing system for failure subscriber line |
-
1985
- 1985-08-12 JP JP60177413A patent/JPH0714829B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000032534A1 (en) * | 1998-11-30 | 2000-06-08 | Taiheiyo Cement Corporation | Process for producing dispersant for powdery hydraulic composition |
| JP2002536289A (en) * | 1999-02-10 | 2002-10-29 | デグサ コンストラクション ケミカルズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Powdered polymer composition based on polyether carboxylate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6241743A (en) | 1987-02-23 |
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