JPH05213646A - Admixture for extrusion molding of asbestos-free cement - Google Patents
Admixture for extrusion molding of asbestos-free cementInfo
- Publication number
- JPH05213646A JPH05213646A JP4628292A JP4628292A JPH05213646A JP H05213646 A JPH05213646 A JP H05213646A JP 4628292 A JP4628292 A JP 4628292A JP 4628292 A JP4628292 A JP 4628292A JP H05213646 A JPH05213646 A JP H05213646A
- Authority
- JP
- Japan
- Prior art keywords
- asbestos
- extrusion molding
- quaternary nitrogen
- admixture
- cement
- 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.)
- Pending
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 38
- 239000004568 cement Substances 0.000 title claims abstract description 28
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 57
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229920013820 alkyl cellulose Polymers 0.000 claims abstract description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 28
- 238000006467 substitution reaction Methods 0.000 claims description 16
- 239000010425 asbestos Substances 0.000 claims description 12
- 229910052895 riebeckite Inorganic materials 0.000 claims description 12
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 8
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 8
- 229920003086 cellulose ether Polymers 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- -1 nitrogen-containing compound Chemical class 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 2
- PUAQLLVFLMYYJJ-UHFFFAOYSA-N 2-aminopropiophenone Chemical compound CC(N)C(=O)C1=CC=CC=C1 PUAQLLVFLMYYJJ-UHFFFAOYSA-N 0.000 abstract 2
- 239000000047 product Substances 0.000 description 11
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 10
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 9
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 150000002170 ethers Chemical class 0.000 description 4
- 229920000609 methyl cellulose Polymers 0.000 description 4
- 239000001923 methylcellulose Substances 0.000 description 4
- 235000010981 methylcellulose Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 2
- 235000012438 extruded product Nutrition 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 description 1
- VLRGXXKFHVJQOL-UHFFFAOYSA-N 3-chloropentane-2,4-dione Chemical compound CC(=O)C(Cl)C(C)=O VLRGXXKFHVJQOL-UHFFFAOYSA-N 0.000 description 1
- VFKZECOCJCGZQK-UHFFFAOYSA-M 3-hydroxypropyl(trimethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CCCO VFKZECOCJCGZQK-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001248 thermal gelation Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
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
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00129—Extrudable mixtures
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/12—Absence of mineral fibres, e.g. asbestos
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無石綿系（ノンアスベ
スト系）セメント押出し成形用混和剤に関するものであ
る。すなわち、セメント質材料，石綿を含まない繊維補
強剤，骨材等を主成分として押出し成形法により製造さ
れる、セメント押出し成形品用混和剤に関するものであ
る。FIELD OF THE INVENTION The present invention relates to an admixture for asbestos-free (non-asbestos) cement extrusion molding. That is, the present invention relates to an admixture for a cement extrusion molded article, which is produced by an extrusion molding method using a cementitious material, a fiber reinforcement not containing asbestos, an aggregate and the like as main components.
【０００２】[0002]
【従来の技術】従来のセメント質材料を主成分とする水
混練り物を押出し成形する方法に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a method for extruding a water-kneaded product containing a cementitious material as a main component.
【０００３】例えば、石綿，セメントの水混練り物を押
し出す場合特に問題となることは、ダイスにかかる押出
し圧力により水混練り物の保水性が悪いため、脱水現象
を起こし押出し不能となる。For example, when a water-kneaded product of asbestos and cement is extruded, a particular problem is that the water-kneaded product has a poor water retention due to the extrusion pressure applied to the die, which causes a dehydration phenomenon and makes extrusion impossible.
【０００４】従来この脱水現象を防止するために、メチ
ルセルロースエ−テル，ヒドロキシプロピルメチルセル
ロースエ−テル，ヒドロキシエチルメチルセルロースエ
−テテル，ヒドロキシエチルセルロースエ−テル，ヒド
ロキシプロピルセルロースエ−テル等のセルロース誘導
体、ポリビニルアルコール，ポリエチレンオキサイド，
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
（たとえば特公昭４３−７１３４号公報参照）。Conventionally, in order to prevent this dehydration phenomenon, cellulose derivatives such as methylcellulose ether, hydroxypropylmethylcellulose ether, hydroxyethylmethylcellulose ether, hydroxyethylcellulose ether, hydroxypropylcellulose ether, and polyvinyl derivatives. Alcohol, polyethylene oxide,
Hydro-modifying agents such as polyacrylamide are known (see, for example, Japanese Patent Publication No. 43-7134).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来のセメント押出し成形品においては、近年耐熱
性，遮音性，耐久性等の性能に対する要求が向上し、複
雑な形状の成形品が増加している。かかる複雑な形状の
押出し成形時に非常に高い剪断力が働き、このため内部
に発生する摩擦熱により、セメント混練り品の温度が上
昇し、特に夏期ににおいては、４０〜９０℃に上昇す
る。この様な高温時におけるセメント押出し成形におい
ては、上記したセメント押出し成形品用混和剤のうち、
ゲル化点を有するメチルセルロース，ヒドロキシプロピ
ルメチルセルロース，ヒドロキシエチルメチルセルロー
ス等の混和剤は、４０〜９０℃の高温ゲル化を起こすた
めに、押出し成形品用混和剤としての機能が著しく低下
し、セメント混練り品の脱水防止機能がなくなり、押出
し圧力が急激に上昇し押出し成形品がひびわれを起こす
という問題点があった。However, in such a conventional cement extrusion molded article, demands for performance such as heat resistance, sound insulation and durability have been improved in recent years, resulting in an increase in the number of molded articles having complicated shapes. ing. A very high shearing force is exerted during extrusion molding of such a complicated shape, and the frictional heat generated inside thereof causes the temperature of the cement kneaded product to rise, particularly in summer, to 40 to 90 ° C. In the cement extrusion molding at such a high temperature, among the above-mentioned cement extrusion molded article admixture,
Admixtures such as methylcellulose, hydroxypropylmethylcellulose, and hydroxyethylmethylcellulose, which have a gel point, cause high-temperature gelation at 40 to 90 ° C, so that the function as an admixture for extrusion molded products is significantly reduced, and cement mixing is performed. There is a problem that the dehydration prevention function of the product is lost, the extrusion pressure rises rapidly, and the extrusion molded product is cracked.
【０００６】[0006]
【課題を解決するための手段】この発明は、このような
従来の問題点に着目してなされたものである。すなわ
ち、第４級窒素を含有するアルキルセルロースエーテル
もしくは、第４級窒素を含有するヒドロキシアルキルア
ルキルセルロースエーテルを含有してなることを特徴と
する、無石綿系セメント押出し成形用混和剤を使用する
ことにより、Ｎｏｎ−アスベスト処方で、高温時におけ
る押出し成形においても、ゲル化を起こさず良好な押出
し成形が可能であり、粘着力に優れているため、きれい
な表面平滑性を示すセメント押出し成形品を得ることが
出来ることを見いだし、本発明を完成するに至った。The present invention has been made by paying attention to such conventional problems. That is, the use of an asbestos-based cement extrusion molding admixture characterized by containing an alkyl cellulose ether containing quaternary nitrogen or a hydroxyalkyl alkyl cellulose ether containing quaternary nitrogen. The non-asbestos formulation enables excellent extrusion without gelation even at high temperatures, and has excellent adhesive strength, so that a cement extruded product showing clean surface smoothness can be obtained. They found that they could do so and completed the present invention.
【０００７】即ち、本発明は、第４級窒素を含有するア
ルキルセルロースエーテル、もしくは、第４級窒素を含
有するヒドロキシアルキルアルキルセルロースエーテル
を含有することを特徴とする無石綿系セメント押出し成
形用混和剤を提供するものである。That is, the present invention comprises an asbestos-based cement extrusion molding admixture characterized by containing an alkyl cellulose ether containing quaternary nitrogen or a hydroxyalkyl alkyl cellulose ether containing quaternary nitrogen. To provide the agent.
【０００８】（手段を構成する要件）本発明に使用する
第４級窒素を含有するアルキルセルロースエーテル、及
び第４級窒素を含有するヒドロキシアルキルアルキルセ
ルロースエーテル等としては、例えば、第４級窒素を含
有したメチルセルロースエ−テル、第４級窒素を含有し
たヒドロキシエチルセルロースエ−テル、第４級窒素を
含有したヒドロキシプロピルメチルセルロースエ−テ
ル、第４級窒素を含有したヒドロキエチルメチルセルロ
ースエ−テル等が挙げられる。中でも、第４級窒素を含
有したメチルセルロースエ−テル、第４級窒素を含有し
たヒドロキシプロピルメチルセルロースエ−テル、及び
第４級窒素を含有したヒドロキエチルメチルセルロース
エ−テルが、無石綿系セメント押出し成形用混和剤が望
ましい。(Requirements Constituting Means) Examples of the quaternary nitrogen-containing alkyl cellulose ether and the quaternary nitrogen-containing hydroxyalkyl alkyl cellulose ether used in the present invention include quaternary nitrogen. Methyl cellulose ethers containing, quaternary nitrogen-containing hydroxyethyl cellulose ethers, quaternary nitrogen-containing hydroxypropyl methyl cellulose ethers, quaternary nitrogen-containing hydroxyethyl methyl cellulose ethers, and the like. Be done. Among them, methylcellulose ether containing quaternary nitrogen, hydroxypropylmethylcellulose ether containing quaternary nitrogen, and hydroxyethylmethylcellulose ether containing quaternary nitrogen are asbestos-free cement extrusion molding. Admixtures are preferred.
【０００９】また、本発明に用いられる第４級窒素を含
有したメチルセルロースエ−テル、第４級窒素を含有し
たヒドロキシプロピルメチルセルロースエ−テル、及び
第４級窒素を含有したヒドロキエチルメチルセルロース
エ−テルは、２％水溶液に於ける粘度が５００ｃｐ以上
１００，０００ｃｐ以下、好ましくは３０００ｃｐ以上
８０，０００ｃｐ以下のものが適当である。Further, the quaternary nitrogen-containing methyl cellulose ether used in the present invention, the quaternary nitrogen-containing hydroxypropyl methyl cellulose ether, and the quaternary nitrogen-containing hydroxyethyl methyl cellulose ether. Is suitable that the viscosity in a 2% aqueous solution is 500 cp or more and 100,000 cp or less, preferably 3000 cp or more and 80,000 cp or less.
【００１０】第４級窒素を含有し、メトキシ置換度数
（ＤＳ）１．２〜２．０及び、第４級基置換度（Ｑ−Ｄ
Ｓ）０．０１〜１．０を有するアルキルセルロースエー
テルあるいは、第４級窒素を含有しメトキシ置換度数
（ＤＳ）１．０〜２．５、ヒドロキシアルキルモル置換
度（ＭＳ）０．２５〜２．５及び、第４級基置換度（Ｑ
−ＤＳ）０．０１〜０．８もしくは、エトキシ置換度
（ＤＳ）０．２〜０．８ヒドロキシアルキルモル置換度
（ＭＳ）１．０〜２．８及び、第４級基置換度（Ｑ−Ｄ
Ｓ）０．０１〜０．５を有することが条件となる。It contains quaternary nitrogen and has a methoxy substitution degree (DS) of 1.2 to 2.0 and a quaternary group substitution degree (Q-D).
S) Alkyl cellulose ether having 0.01 to 1.0 or quaternary nitrogen-containing methoxy substitution degree (DS) 1.0 to 2.5, hydroxyalkyl mole substitution degree (MS) 0.25 to 2 .5 and quaternary group substitution degree (Q
-DS) 0.01 to 0.8 or ethoxy substitution degree (DS) 0.2 to 0.8 hydroxyalkyl mole substitution degree (MS) 1.0 to 2.8, and quaternary group substitution degree (Q -D
S) is required to have 0.01 to 0.5.
【００１１】また、これら第４級窒素を含有したアルキ
ルセルロースエーテル及び、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、５００以上５０，０
００以下であることが望ましく、重合度５００以下であ
ると満足のいく、保形性能を持った押出し成形用組成物
が得られにくく、重合度５０，０００以上であると、冷
水においてもセルロースエーテルが解けにくくなり、添
加剤としての機能を有しなくなる。The degree of polymerization of these quaternary nitrogen-containing alkyl cellulose ethers and hydroxyalkyl alkyl cellulose ethers is 500 or more and 50,0.
A polymerization degree of 500 or less is desirable, and it is difficult to obtain a satisfactory extrusion-molding composition having a shape-retaining performance when the polymerization degree of 500 or less, and a polymerization degree of 50,000 or more makes the cellulose ether even in cold water. Becomes difficult to dissolve and has no function as an additive.
【００１２】本発明に使用する、第４級窒素含有セルロ
ースエーテルの製造方法については、限定するものでは
なく、いかなる方法においても、第４級窒素含有アルキ
ルセルロースエーテル及び、第４級窒素含有ヒドロキシ
アルキルアルキルセルロースエーテルであれば特に限定
するものではない。The method for producing the quaternary nitrogen-containing cellulose ether used in the present invention is not limited, and in any method, the quaternary nitrogen-containing alkyl cellulose ether and the quaternary nitrogen-containing hydroxyalkyl are used. There is no particular limitation as long as it is an alkyl cellulose ether.
【００１３】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。また、補強のために石綿，ガラス
繊維等無機質繊維材料，ナイロン繊維，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なんら阻害
しない。他の水溶性高分子を併用することも可能であ
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 and fly ash cement can be used. Further, addition of asbestos, inorganic fiber materials such as glass fibers, and organic fibers such as nylon fibers and polypropylene for reinforcement does not impair the effects of the present invention. It is also possible to use other water-soluble polymers in combination.
【００１４】添加する第４級窒素を含有したアルキルセ
ルロースエーテル、第４級窒素を含有したヒドロキシア
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，押出し機ダ
イス形状等により種々選ばれるため、本発明においては
特に限定されるものではないが、通常は前者０．１〜１
０重量部、好ましくは１〜３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。また、水の量は通
常１５〜８０部、好ましくは１５〜４０部が好ましく用
いられる。The use ratio of the quaternary nitrogen-containing alkyl cellulose ether to be added, the quaternary nitrogen-containing hydroxyalkyl alkyl cellulose ether, and the cementitious material is selected as the cementitious material, extruder die shape, etc. It is not particularly limited in the present invention because it is variously selected according to
The one containing 0 parts by weight, preferably 1 to 3 parts by weight in the latter 100 parts by weight is preferably used. The amount of water is usually 15 to 80 parts, preferably 15 to 40 parts.
【００１５】混和剤の使用方法の例を示せば以下のとう
りである。すなわち、セメント系材料，繊維質材料，骨
材及び、本発明の混和剤をニーダー型ミキサー等でドラ
イブレンドした後、水を加え、スクリュー形真空押出し
成形機，スクリュー形押出し成形機，プランジャー形押
出し成形機等とその先端につけたダイス等を通して、水
混物を所望の形に押出し成形する。押し出された押出し
成形品は、切断機等を用いて所望の長さに切断した後室
温，蒸気養生，または、オートクレーブ養生等で養生後
製品とする。An example of the method of using the admixture is as follows. That is, the cement-based material, the fibrous material, the aggregate, and the admixture of the present invention are dry-blended with a kneader type mixer or the like, and then water is added to the screw type vacuum extruder, the screw type extruder, the plunger type. The water mixture is extruded into a desired shape through an extruder and the like and a die attached to the tip thereof. The extruded extruded product is cut into a desired length with a cutting machine or the like, and then cured at room temperature, steam curing, or autoclave curing to obtain a post-cured product.
【００１６】本発明では、各配合材料及び、その配合料
が適切に配合されていると共に、第４級窒素を含有した
アルキルセルロースエーテルまたは、第４級窒素を含有
したヒドロキシアルキルアルキルセルロースエーテルを
添加することに主要点がある。メチルセルロース，ヒド
ロキシプロピルメチルセルロース及び、ヒドロキシエチ
ルメチルセルロース等は、熱ゲル化能を有しており水溶
液温度を上昇させると熱ゲル化して不溶化するという性
質がある。In the present invention, each compounding material and its compounding agent are appropriately compounded, and quaternary nitrogen-containing alkyl cellulose ether or quaternary nitrogen-containing hydroxyalkyl alkyl cellulose ether is added. There is a major point to do. Methylcellulose, hydroxypropylmethylcellulose, hydroxyethylmethylcellulose and the like have a heat gelling ability and have the property of being heat gelled and insolubilized when the temperature of the aqueous solution is raised.
【００１７】しかしながら、メチルセルロース，ヒドロ
キシプロピルメチルセルロース及び、ヒドロキシエチル
メチルセルロース等に、第４級窒素を含有することによ
り１００℃以上の熱ゲル化点を有するカチオン性第４級
窒素を含有したアルキルセルロースエーテル、または、
第４級窒素を含有したヒドロキシアルキルアルキルセル
ロースエーテルなる新規物質となり、４０〜９０℃の高
温下に於てゲル化を起こさず、セメント押出し成形品用
混和剤としての機能を低下させる事なく、所望の形状の
セメント系の押出し成形を可能とするものである。However, an alkyl cellulose ether containing a cationic quaternary nitrogen having a thermal gelation point of 100 ° C. or higher by containing quaternary nitrogen in methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose and the like, Or
It becomes a novel substance which is a hydroxyalkylalkyl cellulose ether containing quaternary nitrogen, does not cause gelation under high temperature of 40 to 90 ° C, and does not deteriorate the function as an admixture for cement extrusion molded articles, and is desired. It enables extrusion molding of cement-shaped cement.
【００１８】[0018]
【実施例】以下に本発明を実施例により具体的に説明す
るが、本発明はこれら実施例に限定されるものではな
い。EXAMPLES The present invention will now be described in detail with reference to examples, but the present invention is not limited to these examples.
【００１９】表１および表２に示す配合組成の原料を品
温３０℃以下となるようにして混合，混練りし、スクリ
ュー径３０ｍｍφのシリンダーを持った真空押出し成形
機を用いて、１０ｍｍ×３０ｍｍのダイスを用いて押出
し成形を行った。The raw materials having the composition shown in Tables 1 and 2 are mixed and kneaded so that the product temperature is 30 ° C. or lower, and 10 mm × 30 mm are used by using a vacuum extrusion molding machine having a cylinder with a screw diameter of 30 mmφ. Extrusion molding was performed using the die.
【００２０】押出し成形体温度をコントロールすべく、
押出し機のスクリューバレル温度を２０℃〜７０℃程度
に保温して押出し成形した。それらの測定結果は、表１
および表２に示した。In order to control the temperature of the extruded body,
The screw barrel temperature of the extruder was kept at about 20 ° C to 70 ° C to perform extrusion molding. The measurement results are shown in Table 1.
And shown in Table 2.
【００２１】[0021]
【表１】 [Table 1]
【００２２】なお、表１に示したＱ−ＨＰＭＣは、以下
の要領にて製造した。アセトニトリル４５０ｇ中（窒素
置換）、２４ｇのヒドロキシプロピルセルロースのスラ
リーを温室で３０分間撹拌した。このスラリーに水酸化
ナトリウムの５０％水溶液１７ｇを加え、室温で１時間
撹拌した後５℃に冷却し、０．２モルの３−クロロ−２
−ヒドロキシプロピルトリメチルアンモニウムクロライ
ドの水溶液５２．６ｇを加えた。５０℃で１時間撹拌し
た後この混合物を５０℃に過熱しこの温度に３時間保持
した後、１２．５ｍｌの酢酸を加え中和し、更に１５分
間撹拌した。反応生成物をろ過によって回収し３回洗浄
し、４５℃の真空炉のなかで恒量となるまで乾燥して粗
製の第４級窒素含有ヒドロキシプロピルメチルセルロー
ス３４．４ｇを得た。これをアセトニトリル中で引き続
き２回沈殿させて精製して１．７％の塩化物イオンを含
有する生成物を得、これを次に充分透析によって精製し
て、１．４％の塩化物イオンを含有する精製された第４
級窒素含有ヒドロキシプロピルメチルセルロースエ−テ
ルを得ることができた。（以下同様にして製造した）The Q-HPMC shown in Table 1 was manufactured according to the following procedure. A slurry of 24 g hydroxypropylcellulose in 450 g acetonitrile (nitrogen purge) was stirred in the greenhouse for 30 minutes. To this slurry was added 17 g of a 50% aqueous solution of sodium hydroxide, the mixture was stirred at room temperature for 1 hour and then cooled to 5 ° C. to give 0.2 mol of 3-chloro-2.
52.6 g of an aqueous solution of hydroxypropyltrimethylammonium chloride was added. After stirring at 50 ° C. for 1 hour, the mixture was heated to 50 ° C. and kept at this temperature for 3 hours, 12.5 ml of acetic acid was added to neutralize, and the mixture was further stirred for 15 minutes. The reaction product was collected by filtration, washed three times, and dried in a vacuum oven at 45 ° C. until a constant weight was obtained to obtain 34.4 g of crude quaternary nitrogen-containing hydroxypropylmethyl cellulose. This was subsequently precipitated twice in acetonitrile and purified to give a product containing 1.7% chloride ion, which was then purified by extensive dialysis to give 1.4% chloride ion. Purified fourth containing
A grade nitrogen-containing hydroxypropyl methylcellulose ether could be obtained. (Manufactured in the same manner below)
【００２３】[0023]
【表２】 [Table 2]
【００２４】[0024]
【発明の効果】以上説明したとうり、本発明に於けるア
スベストを使用しない、いわゆるノンアスベスト処方で
あっても、押出し成形時に非常に高い剪断力が働き、内
部に発生する摩擦熱によりセメント混練り品の温度が上
昇しても、きれいな表面平滑性を示すセメント押出し成
形が可能となり、極めて優れた押出し成形機能を発揮す
ることができる。As described above, even in the so-called non-asbestos formulation in which asbestos is not used in the present invention, a very high shearing force is exerted during extrusion molding, and the cement heat is generated due to frictional heat generated inside. Even if the temperature of the kneaded product rises, it becomes possible to carry out the cement extrusion molding showing a clean surface smoothness, and it is possible to exhibit an extremely excellent extrusion molding function.
Claims (5)
スエーテル、もしくは、第４級窒素を含有するヒドロキ
シアルキルアルキルセルロースエーテルを含有すること
を特徴とする無石綿系セメント押出し成形用混和剤。1. An admixture for asbestos-free cement extrusion molding, which comprises an alkyl cellulose ether containing quaternary nitrogen or a hydroxyalkyl alkyl cellulose ether containing quaternary nitrogen.
（ＤＳ）１．２〜２．０及び、第４級基置換度（Ｑ−Ｄ
Ｓ）０．０１〜１．０を有するアルキルセルロースエー
テルを使用することを特徴とする特許請求の範囲第１項
記載の無石綿系セメント押出し成形用混和剤。2. A quaternary nitrogen-containing compound, which has a methoxy substitution degree (DS) of 1.2 to 2.0 and a quaternary group substitution degree (Q-D).
The asbestos-based cement extrusion admixture according to claim 1, characterized in that S) an alkyl cellulose ether having 0.01 to 1.0 is used.
（ＤＳ）１．０〜２．５、ヒドロキシアルキルモル置換
度（ＭＳ）０．２５〜２．５及び、第４級基置換度（Ｑ
−ＤＳ）０．０１〜０．８を有するヒドロキシアルキル
アルキルセルロースエーテルを使用することを特徴とす
る特許請求の範囲第１項記載の無石綿系セメント押出し
成形用混和剤。3. A quaternary nitrogen-containing methoxy substitution degree (DS) of 1.0 to 2.5, a hydroxyalkyl mole substitution degree (MS) of 0.25 to 2.5, and a quaternary group substitution degree. (Q
An admixture for asbestos-free cement extrusion according to claim 1, characterized in that a hydroxyalkylalkyl cellulose ether having -DS) 0.01 to 0.8 is used.
（ＤＳ）０．２〜０．８ヒドロキシアルキルモル置換度
（ＭＳ）１．０〜２．８及び、第４級基置換度（Ｑ−Ｄ
Ｓ）０．０１〜０．５を有するヒドロキシアルキルアル
キルセルロースエーテルを使用することを特徴とする特
許請求の範囲第１項記載の無石綿系セメント押出し成形
用混和剤。4. A quaternary nitrogen-containing ethoxy substitution degree (DS) 0.2 to 0.8 hydroxyalkyl mole substitution degree (MS) 1.0 to 2.8 and a quaternary group substitution degree ( Q-D
S) An asbestos-based cement extrusion admixture according to claim 1, characterized in that a hydroxyalkylalkyl cellulose ether having 0.01 to 0.5 is used.
０，０００以下のアルキルセルロースエーテル、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を
使用することを特徴とする特許請求の範囲第１項記載の
無石綿系セメント押出し成形用混和剤。5. A polymerization degree of 500 or more 5 containing quaternary nitrogen.
An asbestos-based cement extrusion compounding admixture according to claim 1, characterized in that an alkylcellulose ether of 20,000 or less or a hydroxyalkylalkylcellulose ether is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4628292A JPH05213646A (en) | 1992-01-31 | 1992-01-31 | Admixture for extrusion molding of asbestos-free cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4628292A JPH05213646A (en) | 1992-01-31 | 1992-01-31 | Admixture for extrusion molding of asbestos-free cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05213646A true JPH05213646A (en) | 1993-08-24 |
Family
ID=12742874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4628292A Pending JPH05213646A (en) | 1992-01-31 | 1992-01-31 | Admixture for extrusion molding of asbestos-free cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05213646A (en) |
-
1992
- 1992-01-31 JP JP4628292A patent/JPH05213646A/en active Pending
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