JPH01294555A - Admixture for extrusion molded article of cement - Google Patents
Admixture for extrusion molded article of cementInfo
- Publication number
- JPH01294555A JPH01294555A JP12285788A JP12285788A JPH01294555A JP H01294555 A JPH01294555 A JP H01294555A JP 12285788 A JP12285788 A JP 12285788A JP 12285788 A JP12285788 A JP 12285788A JP H01294555 A JPH01294555 A JP H01294555A
- Authority
- JP
- Japan
- Prior art keywords
- admixture
- cement
- cellulose ether
- extrusion
- particle size
- 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
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 32
- 239000004568 cement Substances 0.000 title claims abstract description 18
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229920013820 alkyl cellulose Polymers 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 15
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims abstract description 11
- 238000006467 substitution reaction Methods 0.000 claims abstract description 11
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 5
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims abstract description 5
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims abstract 3
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 229920000609 methyl cellulose Polymers 0.000 abstract description 5
- 239000001923 methylcellulose Substances 0.000 abstract description 5
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 abstract description 4
- 230000018044 dehydration Effects 0.000 abstract description 4
- 238000006297 dehydration reaction Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 3
- -1 methyl hydroxy Chemical group 0.000 abstract description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 abstract 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 abstract 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 abstract 1
- 229940071676 hydroxypropylcellulose Drugs 0.000 abstract 1
- 239000000463 material Substances 0.000 description 18
- 239000010425 asbestos Substances 0.000 description 7
- 229910052895 riebeckite Inorganic materials 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 235000012438 extruded product Nutrition 0.000 description 4
- 235000010981 methylcellulose Nutrition 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229920013819 hydroxyethyl ethylcellulose Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はセメント押出成形品用混和剤に関するものであ
る。すなわち、セメント質材料、ｍＩｎ状物を主な原料
として押出成形法により製造されるセメント押出成形品
用混和剤に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an admixture for cement extrudates. That is, the present invention relates to an admixture for cement extrusion molded products manufactured by an extrusion molding method using a cementitious material or mIn-like material as the main raw material.
［従来技術］
従来のセメント質材料を主成分とする水混練物を押出成
形する方法に関するものは１例えば１石綿、セメントの
水混練物を押出す場合、特に問題となることはダイスに
かかる押出圧力により水混練物の保水性が悪いため、脱
水現象を起し押出し不能となる。[Prior Art] Regarding the conventional method for extruding a water-kneaded product mainly composed of cementitious materials, for example, 1.For example, when extruding a water-kneaded product of asbestos and cement, a particular problem is the extrusion required by the die. Due to the pressure, the water-kneaded material has poor water retention and dehydration occurs, making it impossible to extrude.
従来、この脱水現象を防止するために、セルロース誘導
体、ポリビニルアルコール、ポリみチレンオキシド、ポ
リアクリルアミド等のハイドロ変型剤が知られている。Conventionally, in order to prevent this dehydration phenomenon, hydro-transforming agents such as cellulose derivatives, polyvinyl alcohol, polyethylene oxide, and polyacrylamide have been known.
（例えば特公昭４３−７１３４号公報）
［発明が解決しようとする課Ｗｉ］
しかしながら、このような従来の押出成形工程において
は、従来のスレートと同様１石綿使用が不可欠とされて
いたが、石綿は健康に害を与える恐れがあるとして、米
国をはじめ、ヨーロッパ各国では使用が禁止され、わが
国でも規制される方向にある。従って、現在では前記押
出成形品においても、アスベストを使用しない、いわゆ
るノンアスベストシステムの検討が行なわれている。(For example, Japanese Patent Publication No. 43-7134) [Issues to be solved by the invention] However, in such a conventional extrusion molding process, the use of asbestos was considered indispensable as in the case of conventional slate; Its use has been banned in the United States and other European countries, as it may be harmful to health, and there are plans to restrict it in Japan as well. Therefore, studies are currently underway on so-called non-asbestos systems that do not use asbestos in the extrusion molded products.
このようなノンアスベスト処方では、前記したセメント
押出成形品用混和剤では機能が著しく低下して、押出圧
力が上昇し、且つ押出成形品の表面平滑性が不良となり
押出作業性が極めて悪化するという欠点を有している。In such a non-asbestos formulation, the functionality of the admixture for cement extrusion molded products described above is significantly reduced, the extrusion pressure increases, and the surface smoothness of the extrusion molded product becomes poor, resulting in extremely poor extrusion workability. It has its drawbacks.
［課題を解決するための手段］
本発明者らは、上記問題点を解決すべく鋭意研究の結果
１本発明に到達したものである。すなわち、本発明は、
粒度が１００μ以下であって、その５０重量％以上が５
０１Ｌ以下であるアルキルセルロースエーテル、および
ヒドロキシアルギルアルキルセルロースエーテルの少な
くとも１種以上を含有することを特徴とするセメント押
出成形品用混和剤を提供するものである。[Means for Solving the Problems] The present inventors have arrived at the present invention as a result of intensive research to solve the above problems. That is, in the present invention, the particle size is 100μ or less, and 50% by weight or more of the particle size is 50μ or less.
The present invention provides an admixture for cement extrusion molded products, characterized in that it contains at least one or more of alkyl cellulose ethers and hydroxyargylalkyl cellulose ethers of 0.01 L or less.
本発明に使用するアルキルセルロースエーテル、および
ヒドロキシアルキルアルキルセルロースエーテルとして
は１例えば、メチルセルロース（ＭＣ）、 メチルヒド
ロキシエチルセルロース（ＭＨＥＣ）、 メチルヒドロ
キシプロピルセルロース（ＭＨＰＣ）等が挙げられるが
、さらに、ヒドロキシプロピルエチルセルロース（ＨＰ
ＥＣ）、ヒドロキシエチルエチルセルロース（ＨＥＥＣ
） 等のセルロースエーテル類の使用も本願発明の効果
を何等妨げるものではない、なかでも、メチルセルロー
ス、メチルヒドロキシエチルセルロースおよび、メチル
ヒドロキシプロピルセルロースの粒度が１００ｇ以下で
あって、その５０重量％以上が５０１Ｌ以下、より好ま
しくはその粒度が７６ルであって、その５０重量％以上
が４５蒔以下である性状のものである。Examples of the alkyl cellulose ether and hydroxyalkyl alkyl cellulose ether used in the present invention include methylcellulose (MC), methylhydroxyethylcellulose (MHEC), methylhydroxypropylcellulose (MHPC), etc., and hydroxypropylethylcellulose. (HP
EC), hydroxyethyl ethyl cellulose (HEEC)
The use of cellulose ethers such as More preferably, the particle size is 76 μl, and 50% by weight or more of the particle size is 45 μl or less.
また１本発明に用いられるメチルセルロース、メチルヒ
ドロキシプロピルセルロース、メチルヒドロキシエチル
セルロースは、２％水溶液における粘度が、好ましくは
３００ｃｐ Ｎ１５０，０００Ｃｐ、より好ましくは３
，０００ｃｐ−１００゜０００ｃｐの範囲のものである
。Furthermore, the viscosity of the methylcellulose, methylhydroxypropylcellulose, and methylhydroxyethylcellulose used in the present invention in a 2% aqueous solution is preferably 300 cp N150,000 Cp, more preferably 3
,000cp-100°000cp.
さらに、置換度としては、アルキルセルロースのメトキ
シ置換度（ａｓ）ｉ、ｏ〜２６２、またヒドロキシアル
キルアルキルセルロースにおいては、メトキシ置換度（
ＤＳ）１．０〜２，５、ヒドロキシアルキルモル置換度
（ＭＳ）０．０５〜２．５を有するもが、より好ましく
用いられる。Furthermore, as for the degree of substitution, the degree of methoxy substitution (as) i, o~262 for alkyl cellulose, and the degree of methoxy substitution (as) for hydroxyalkylalkyl cellulose.
Those having a DS) of 1.0 to 2.5 and a hydroxyalkyl molar substitution degree (MS) of 0.05 to 2.5 are more preferably used.
また、これらヒドロキシアルキルアルキルセルロースエ
ーテルの重合度は２００以上、ｌ 、 ５００以下であ
ることがより好ましい。Further, the degree of polymerization of these hydroxyalkylalkylcellulose ethers is more preferably 200 or more and 500 or less.
本発明に用いられるセメント質材料は普通ポルトランド
セメントの他、高炉セメント、フライアッシュセメント
等、およそすべてのセメント質材料を使用することがで
きる。As the cementitious material used in the present invention, in addition to ordinary Portland cement, almost all cementitious materials such as blast furnace cement, fly ash cement, etc. can be used.
また、補強のため石綿、ガラスｍｍ等の無機質材料、ナ
イロン繊維、炭素繊維、アラミドｍ維、ポリプロピレン
等の有機質繊維を添加しても、本発明の効果を何等阻害
しないし、他の水溶性高分子化合物を併用使用すること
もできる。Further, even if inorganic materials such as asbestos, glass mm, etc., organic fibers such as nylon fibers, carbon fibers, aramid m fibers, and polypropylene are added for reinforcement, the effects of the present invention will not be impaired in any way, and other water-soluble highly Molecular compounds can also be used in combination.
添加するアルキルセルロースエーテル、およびヒドロキ
シアルキルアルキルセルロースエーテルと、セメント質
材料との使用比率は選定されたセメント質材料、押出機
ダイス形状等により種々選択されるため、本発明におい
ては特に、限定されるものでないが、通常は前者０．１
〜５重量部。The ratio of the alkyl cellulose ether and hydroxyalkyl alkyl cellulose ether to be added to the cementitious material is variously selected depending on the selected cementitious material, the extruder die shape, etc., and therefore is particularly limited in the present invention. Although not a big deal, the former is usually 0.1
~5 parts by weight.
好ましくは１〜２重量部を、後者１００重量部に含有さ
れたものが好ましく用いられる。Preferably, 1 to 2 parts by weight are used, with the latter being preferably contained in 100 parts by weight.
また、水の量は通常、１５〜８０重量部、好ましくは１
５〜４０重量部が用いられる。In addition, the amount of water is usually 15 to 80 parts by weight, preferably 1
5 to 40 parts by weight are used.
本発明混和剤の使用方法の例を示せば、以下の通りであ
る。すなわち、セメント系材料、ｍ維質材料、骨材、お
よび本発明混和剤をニーグー型ミキサーなどでトライブ
レンドしたのち、水を加え、スクリュー形押出成形機、
プランジャー形押出成形機などとその先端につけたダイ
スなどを通して水混練物を所望の形に押出成形される。Examples of how to use the admixture of the present invention are as follows. That is, after tri-blending the cementitious material, the fibrous material, the aggregate, and the admixture of the present invention using a Nigu type mixer, water was added, and the mixture was mixed using a screw type extrusion molding machine.
The water kneaded material is extruded into the desired shape through a plunger-type extruder or the like and a die attached to the tip of the extruder.
押出された押出成形品は切断機などを用いて所望の長さ
に切断したあと室温、蒸気養生またはオートクレーブ養
生などで養生後製品とする。The extruded product is cut into desired lengths using a cutting machine or the like, and then cured at room temperature with steam or autoclave to form a product.
本発明においては、各配合材料および、その配合量が適
切に配合されていることともに１粒度が１００μ以下で
あって、その５０重量％以上が５０ｐ以下であるアルキ
ルセルロースエーテル、およびヒドロキシアルキルアル
キルセルロースエーテルの少なくとも１種以上を配合す
ることが主要点である。In the present invention, in addition to appropriately blending each compounding material and the amount thereof, alkylcellulose ether having a particle size of 100μ or less and 50% by weight or more of which is 50p or less, and hydroxyalkyl alkylcellulose The main point is to include at least one kind of ether.
粒度を微粉化することにより分散、混合が良好となり、
セメント、骨材等の間隙に入り、特に水／センメント比
の低い域で保水効果を発揮して。Fine particle size improves dispersion and mixing,
It enters the gaps between cement, aggregate, etc. and exhibits a water retention effect, especially in areas where the water/cement ratio is low.
作業性が向上する。Improves work efficiency.
さらに、この場合、ナフタリンスルホン酸ホルマリン縮
合物の塩、アルキルナフタリンスルホン酸ホルマリン縮
合物の塩、メラミンスルホン酸ホルマリン縮合物の塩等
を併用すれば、その効果は一段と促進される。Furthermore, in this case, if a salt of a naphthalene sulfonic acid formalin condensate, a salt of an alkylnaphthalene sulfonic acid formalin condensate, a salt of a melamine sulfonic acid formalin condensate, etc. are used in combination, the effect will be further promoted.
一方、前記したメチルセルロースおよび、ヒドロキシア
ルキルアルキルセルロースエーテルの粉末度は微粉末で
あれば、ある程好ましいが、しかしながら、設備面、コ
スト面等から判断すれば、そこにはおのずと限度があり
、実用上粉末度を全量１００ｐ、以下に且つ５０．以下
のものを５０％以上含むことが好ましいとの結論に至っ
た。On the other hand, it is preferable to some extent that the fineness of the methyl cellulose and hydroxyalkyl cellulose ether is fine, but there is a limit to this in terms of equipment, cost, etc., and it is not practical. The total amount of fineness is 100p or less and 50. It was concluded that it is preferable to contain 50% or more of the following.
一方、本発明混和剤に関して、そのＤＳ、ＭＳが粒度に
より影Δを受けることなく、前記した範囲のＤＳ、ＭＳ
品を使用することにより成形速度、成形品の表面平滑性
が向上した。On the other hand, regarding the admixture of the present invention, its DS and MS are not influenced by the particle size, and the DS and MS are within the above range.
By using this product, molding speed and surface smoothness of molded products improved.
以下に本発明を実施例により具体的に説明する。The present invention will be specifically explained below using examples.
［％、部は重量基準を示す］
実施例１
第１表に示す通り、普通粒度を有する（ＤＳ）＝１．６
５のヒドロキシアルキルアルキルセルロースエーテルＡ
、をロータツブにて粒度分布の異なるＡ■、Ａ■、Ａ■
、の３種類に篩分けた。これらの置換度には篩分けによ
る差異は認められなかった・
これらをセンメント押出成形品用混和剤として試験した
。[%, parts indicate weight basis] Example 1 As shown in Table 1, normal particle size (DS) = 1.6
5 hydroxyalkylalkylcellulose ether A
, A■, A■, A■ with different particle size distributions using a rotary tube.
It was sieved into three types. No difference was observed in the degree of substitution due to sieving.These were tested as admixtures for cement extrusion molded products.
［試験〕
ポルトランドセメン） １００１ｆｆ１部）珪砂
５０（重量部）ロックウール
１０（ｆｆｉ是部）炭素繊維 １
（重量部）セルロースエーテル １．５（重量部）上
記各成分をトライブレンドした後、水を加え、モルタル
ミキサーで混線後、混練された材料（モルタル）を調製
し、その混練りされた材料を押出成形機によって、その
成形速度を測定した。さらに、押出品の表面の平滑性を
目視判定した。[Test] Portland cement) 1001ff1 part) Silica sand
50 (parts by weight) rock wool
10 (ffi korebe) carbon fiber 1
(Parts by weight) Cellulose ether 1.5 (Parts by weight) After tri-blending each of the above components, water is added, mixed with a mortar mixer, a kneaded material (mortar) is prepared, and the kneaded material is The molding speed was measured using an extrusion molding machine. Furthermore, the smoothness of the surface of the extruded product was visually evaluated.
表面平滑性： ［０：優０：良Δ：可×：不可］押出成
形後、押出品を２０℃で水中養生し曲げ強度を測定した
。（ＡＳＴＭ−２９３−６８に準する。）
第３表に示した結果の通り、粉末粒度が全量７４絡以下
で、且つ４６終以下のものが５０％以上であるヒドロキ
シアルキルアルキルセルロースエーテル試料Ａ■、Ａ■
、Ａ■は母体のＡ、と比較すると、押出成形速度は速く
なっている。また表面平滑性および強度も良好であった
。Surface smoothness: [0: Excellent 0: Good Δ: Fair ×: Poor] After extrusion molding, the extruded product was cured in water at 20° C. and the bending strength was measured. (According to ASTM-293-68.) As shown in Table 3, the hydroxyalkyl alkyl cellulose ether sample A■ has a total powder particle size of 74 or less and 50% or more of 46 or less. ,A■
, A■ have faster extrusion molding speeds than the base material A. Moreover, the surface smoothness and strength were also good.
押出速度（ｃｍ／分）および曲げ強度（４週強度ｋｇ／
ｃｍ２）は母体Ａ、 テ（７）値を１００として比較し
た。Extrusion speed (cm/min) and bending strength (4 week strength kg/
cm2) was compared with parent A and the Te(7) value was set as 100.
実施例２
第２表には第１表の母体Ａ、の篩分けした１０４ｐ以上
のヒドロキシアルキルアルキルセルロースエーテルを試
料Ａ■とし、Ａ■を、再粉砕して全量粒度７４ル以下で
あり、且つ４６ル以下が５０％以、Ｌになるように篩分
けしてＡ■を得た。Example 2 Table 2 shows Sample A■, which is a sieved hydroxyalkylalkylcellulose ether of 104p or more of base material A in Table 1, and A■ is re-pulverized to have a total particle size of 74L or less, and A ■ was obtained by sieving so that 50% or less of L was 46 L or less.
これを実施例１と同様に試験し、た、その結果。This was tested in the same manner as in Example 1, and the results are as follows.
第４表に示した結果から明らかな通り、試料Ａ■は母体
のＡ、と比較すると、押出成形速度は速く、また表面平
滑性および、強度も良好であったが、Ａ■は母体Ａ、よ
り劣っていた。As is clear from the results shown in Table 4, sample A■ had a faster extrusion molding speed and better surface smoothness and strength than base material A; It was inferior.
実施例３
第１表に示した各粒度、各粘度、各タイプの異なったＢ
、、Ｃ，、Ｄ、、の各セルロースエーテルをロータツブ
で全量粒度７４＃Ｌ以下であり、且つ４６ＩＬ以下が５
０％以上になる迄篩分けを行ない、それぞれ得られたも
のを、Ｂ■、Ｃ■、Ｄ■とした。Example 3 Different particle sizes, viscosities, and types of B shown in Table 1
, , C, , D, , in a rotary tube, the total particle size is 74 #L or less, and 46 IL or less is 5
Sieving was carried out until the concentration was 0% or more, and the obtained products were designated as B■, C■, and D■.
これらを、実施例１と同様に試験した。その結果を第５
表に示した。These were tested in the same manner as in Example 1. The result is the fifth
Shown in the table.
第５表から明らかな通り、置換度、粘度、タイプが異な
っても、微粉砕を行なったＢ■、Ｃ■、Ｄ■、は、それ
ぞれの母体より押出成形速度は速く１表面平滑性も良好
で、曲げ強度アップが得られるというセンメント押出成
形品用混和剤にとって画期的な性能の向上が認められた
。As is clear from Table 5, even though the degree of substitution, viscosity, and type are different, B■, C■, and D■, which were finely pulverized, have faster extrusion molding speeds than their respective base materials, and also have good surface smoothness. A revolutionary performance improvement was observed for admixtures for cement extrusion molded products by increasing bending strength.
［発明の効果］
本発明混和剤は、セメント押出成形品用混和剤として従
来の添加剤に比較して、以下特徴を有するものである。[Effects of the Invention] The admixture of the present invention has the following characteristics compared to conventional additives as an admixture for cement extrusion molded products.
■押出成形品の押出速度が上がり、押出成形品の単位時
間当りの生産量を向上できる。■The extrusion speed of extrusion molded products is increased, and the production volume of extrusion molded products per unit time can be improved.
■保水性がより発揮され、押出成形品の表面平滑性が良
好になる。■Water retention is better exhibited, and the surface smoothness of extruded products is improved.
■分散、混合が良くなり、曲げ強度が強くなる。■Improves dispersion and mixing, and increases bending strength.
■ノンアスベスト処方における押出成形で押出成形機内
での脱水現象がなくなる。■Extrusion molding of non-asbestos formulations eliminates dehydration inside the extruder.
上記特徴を有する本願発明混和剤を用いた押出成形品は
ビル外壁をはじめ１間仕切壁、床パネル、一般住宅用外
壁材等として有用である。Extrusion-molded products using the admixture of the present invention having the above characteristics are useful as exterior walls of buildings, partition walls, floor panels, exterior wall materials for general housing, and the like.
特許出願人 第一工業製薬株式会社 昭和６３年６月１５日Patent applicant Daiichi Kogyo Seiyaku Co., Ltd. June 15, 1986
Claims (5)
上が５０μ以下であるアルキルセルロースエーテル、お
よびヒドロキシアルキルアルキルセルロースエーテルの
少なくとも１種以上を含有することを特徴とするセメン
ト押出成形品用混和剤。(1) An admixture for cement extrusion molded products characterized by containing at least one kind of alkyl cellulose ether and hydroxyalkyl alkyl cellulose ether having a particle size of 100 μ or less, of which 50% by weight or more is 50 μ or less agent.
キルセルロースエーテルである特許請求の範囲第１項記
載のセメント押出成形品用混和剤。(2) The admixture for cement extrusion molded products according to claim 1, which is an alkyl cellulose ether having a methoxy substitution degree (DS) of 1.0 to 2.2.
ロキシアルキルモル置換度（ＭＳ）０．０５〜２．５の
ヒドロキシアルキルアルキルセルロースエーテルである
特許請求の範囲第１項記載のセメント押出成形品混和剤
。(3) The cement according to claim 1, which is a hydroxyalkylalkyl cellulose ether having a methoxy substitution degree (DS) of 1.0 to 2.5 and a hydroxyalkyl molar substitution degree (MS) of 0.05 to 2.5. Extrusion admixture.
ルロースエーテル、もしくはヒドロキシアルキルアルキ
ルセルロースエーテルである特許請求の範囲第１項記載
のセメント押出成形品用混和剤。(4) The admixture for cement extrusion molded products according to claim 1, which is an alkyl cellulose ether or a hydroxyalkyl alkyl cellulose ether having a degree of polymerization of 200 or more and 1,500 or less.
ロースエーテル、もしくはヒドロキシアルキルアルキル
セルロースエーテルである特許請求の範囲第１項記載の
セメント押出成形品用混和剤。(5) The admixture for cement extrusion molded products according to claim 1, which is an alkyl cellulose ether or a hydroxyalkyl alkyl cellulose ether having a bulk specific gravity of 0.150 to 0.550.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63122857A JPH0755850B2 (en) | 1988-05-19 | 1988-05-19 | Admixture for cement extrusion products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63122857A JPH0755850B2 (en) | 1988-05-19 | 1988-05-19 | Admixture for cement extrusion products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01294555A true JPH01294555A (en) | 1989-11-28 |
| JPH0755850B2 JPH0755850B2 (en) | 1995-06-14 |
Family
ID=14846360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63122857A Expired - Lifetime JPH0755850B2 (en) | 1988-05-19 | 1988-05-19 | Admixture for cement extrusion products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755850B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1348678A1 (en) * | 2002-03-11 | 2003-10-01 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| EP1344755A3 (en) * | 2002-03-11 | 2006-04-12 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| JP2008201613A (en) * | 2007-02-19 | 2008-09-04 | Shin Etsu Chem Co Ltd | Hydraulic composition for extrusion molding |
| DE102011120101A1 (en) | 2010-12-22 | 2012-06-28 | Dow Global Technologies Llc | Cellulose ethers suitable for the extrusion of cementitious articles having improved properties |
| JP2012522666A (en) * | 2009-04-03 | 2012-09-27 | コーニング インコーポレイテッド | Manufacture of ceramics using rapidly hydratable cellulosic binders. |
| JP2013525156A (en) * | 2010-04-26 | 2013-06-20 | ダウ グローバル テクノロジーズ エルエルシー | Composition for extrusion molding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58132505A (en) * | 1982-02-01 | 1983-08-06 | 信越化学工業株式会社 | Manufacture of cement group shape |
| JPS61227957A (en) * | 1985-04-02 | 1986-10-11 | 信越化学工業株式会社 | Extrusion molding for cementitious material |
| JPS62105948A (en) * | 1985-10-31 | 1987-05-16 | 信越化学工業株式会社 | Manufacture of ceramic extrusion formed body and compositiontherefor |
-
1988
- 1988-05-19 JP JP63122857A patent/JPH0755850B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58132505A (en) * | 1982-02-01 | 1983-08-06 | 信越化学工業株式会社 | Manufacture of cement group shape |
| JPS61227957A (en) * | 1985-04-02 | 1986-10-11 | 信越化学工業株式会社 | Extrusion molding for cementitious material |
| JPS62105948A (en) * | 1985-10-31 | 1987-05-16 | 信越化学工業株式会社 | Manufacture of ceramic extrusion formed body and compositiontherefor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1348678A1 (en) * | 2002-03-11 | 2003-10-01 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| US6843845B2 (en) | 2002-03-11 | 2005-01-18 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| EP1344755A3 (en) * | 2002-03-11 | 2006-04-12 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| JP2008201613A (en) * | 2007-02-19 | 2008-09-04 | Shin Etsu Chem Co Ltd | Hydraulic composition for extrusion molding |
| JP2012522666A (en) * | 2009-04-03 | 2012-09-27 | コーニング インコーポレイテッド | Manufacture of ceramics using rapidly hydratable cellulosic binders. |
| JP2013525156A (en) * | 2010-04-26 | 2013-06-20 | ダウ グローバル テクノロジーズ エルエルシー | Composition for extrusion molding |
| DE102011120101A1 (en) | 2010-12-22 | 2012-06-28 | Dow Global Technologies Llc | Cellulose ethers suitable for the extrusion of cementitious articles having improved properties |
| JP2012148956A (en) * | 2010-12-22 | 2012-08-09 | Dow Global Technologies Llc | Cellulose ether suitable for extrusion of cement bound article with improved property |
| US9115028B2 (en) | 2010-12-22 | 2015-08-25 | Dow Global Technologies Llc | Cellulose ether suitable for the extrusion of cement bound articles with improved properties |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0755850B2 (en) | 1995-06-14 |
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