JP2002068820A - Method for preparing gypsum slurry - Google Patents
Method for preparing gypsum slurryInfo
- Publication number
- JP2002068820A JP2002068820A JP2000264235A JP2000264235A JP2002068820A JP 2002068820 A JP2002068820 A JP 2002068820A JP 2000264235 A JP2000264235 A JP 2000264235A JP 2000264235 A JP2000264235 A JP 2000264235A JP 2002068820 A JP2002068820 A JP 2002068820A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- gypsum slurry
- surfactant
- dispersant
- kneading water
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は石膏スラリーの製造
方法に関する。さらに詳しくは、石膏ボードや石膏プラ
スター等の分野に利用される石膏スラリーの製造方法に
関する。The present invention relates to a method for producing a gypsum slurry. More specifically, the present invention relates to a method for producing a gypsum slurry used in fields such as gypsum board and plaster plaster.
【０００２】[0002]
【従来の技術】従来、石膏ボード等に用いられる石膏ス
ラリーの製造には、分散剤としてリグニンスルホン酸塩
やナフタレンスルホン酸塩ホルムアルデヒド縮合物、メ
ラミンスルホン酸塩ホルムアルデヒド縮合物、トリスフ
ェノール・アミノベンゼンスルホン酸塩共縮合物（特開
平６−９１１４９号公報）等が使用されているが、製造
合理化の観点から更に減水性の高い石膏スラリーの製造
方法の開発が要望されている。2. Description of the Related Art Conventionally, in the production of gypsum slurry used for gypsum board, lignin sulfonate, naphthalene sulfonate formaldehyde condensate, melamine sulfonate formaldehyde condensate, trisphenol / aminobenzene sulfone are used as dispersants. Acid co-condensates (JP-A-6-91149) and the like are used, but from the viewpoint of streamlining the production, development of a method for producing a gypsum slurry with even higher water reduction is demanded.
【０００３】[0003]
【発明が解決しようとする課題】本発明者らは、石膏粒
子の分散過程に着目し、粒子の濡れ性を考慮することで
減水性に優れた石膏スラリーが得られることを見出し
た。即ち、石膏スラリーの製造において、石膏と混練水
の混合時間は通常２〜５秒程度であることから、このよ
うな僅かな時間では石膏粒子を十分にほぐすことができ
ず、流動性の優れた石膏スラリーが得られない。The present inventors have paid attention to the process of dispersing gypsum particles, and have found that a gypsum slurry excellent in water reduction can be obtained by considering the wettability of the particles. That is, in the production of the gypsum slurry, the mixing time of the gypsum and the kneading water is usually about 2 to 5 seconds. Gypsum slurry cannot be obtained.
【０００４】従って、本発明の目的は、減水性に優れた
石膏スラリーを製造する方法を提供することにある。Accordingly, it is an object of the present invention to provide a method for producing a gypsum slurry excellent in water reduction.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、混練水の
表面張力を低下させることにより、石膏粒子と水との濡
れ性を高めて、短時間で石膏粒子をほぐすことができる
点に着目し、本発明を完成するに至った。Means for Solving the Problems The present inventors have found that by reducing the surface tension of kneading water, the wettability between gypsum particles and water can be increased and the gypsum particles can be loosened in a short time. Attention has been paid to complete the present invention.
【０００６】本発明は、表面張力４０〜６０ｍＮ／ｍの
混練水と石膏とを少なくとも混合する石膏スラリーの製
造方法に関する。The present invention relates to a method for producing a gypsum slurry in which at least kneading water having a surface tension of 40 to 60 mN / m and gypsum are mixed.
【０００７】[0007]
【発明の実施の形態】本発明は、特定の表面張力を有す
る混練水を用いる点に大きな特徴がある。表面張力が、
４０ｍＮ／ｍ未満であると、石膏との混合時に粗大泡を
巻き込み、逆に流動性が低下する。この粗大泡は消泡剤
の添加により改善されるが、軽量ボードの場合、同時に
混合する泡沫への影響があり、消泡剤の添加は好ましく
ない。また、表面張力が６０ｍＮ／ｍを超えると、石膏
粒子の濡れ性が不十分である。従って、混練水の表面張
力は、４０〜６０ｍＮ／ｍ、好ましくは４５〜５５ｍＮ
／ｍである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has a major feature in that kneading water having a specific surface tension is used. Surface tension is
If it is less than 40 mN / m, coarse bubbles are involved during mixing with gypsum, and conversely, the fluidity is reduced. This coarse foam can be improved by the addition of an antifoaming agent. However, in the case of a lightweight board, the addition of an antifoaming agent is not preferable because it has an effect on the foam mixed at the same time. If the surface tension exceeds 60 mN / m, the wettability of the gypsum particles is insufficient. Accordingly, the surface tension of the kneading water is 40 to 60 mN / m, preferably 45 to 55 mN / m.
/ M.
【０００８】混練水の表面張力は、例えば界面活性剤の
添加により調整することができ、界面活性剤と分散剤と
を併用すると分散剤の吸収が促進され分散性の効果が大
きいことから、本発明では、分散剤と界面活性剤を含有
した混練水を用いることが好ましい。The surface tension of the kneading water can be adjusted, for example, by adding a surfactant. When a surfactant and a dispersant are used in combination, the absorption of the dispersant is promoted and the effect of dispersibility is large. In the present invention, it is preferable to use kneading water containing a dispersant and a surfactant.
【０００９】界面活性剤は、表面張力を低下させること
ができ、アニオン系、カチオン系、ノニオン系、両性系
の何れの界面活性剤であっても特に限定することなく用
いることができるが、分散剤と併用する際には、分散剤
と同イオン性のアニオン性界面活性剤が好ましい。好ま
しいアニオン性界面活性剤としては、脂肪酸塩、アルキ
ル硫酸エステル塩、アルキルベンゼンスルホン酸塩、ア
ルキルスルホコハク酸塩、ポリオキシエチレンアルキル
（アリル）硫酸エステル塩等が挙げられ、特に好ましく
はアルキル硫酸エステル塩である。The surfactant can reduce the surface tension, and any of anionic, cationic, nonionic and amphoteric surfactants can be used without any particular limitation. When used in combination with an agent, an anionic surfactant having the same ionicity as the dispersant is preferable. Preferred anionic surfactants include fatty acid salts, alkyl sulfate salts, alkyl benzene sulfonates, alkyl sulfosuccinates, polyoxyethylene alkyl (allyl) sulfates, and the like. Particularly preferred are alkyl sulfates. is there.
【００１０】界面活性剤の使用量は、混練水の表面張力
が前記範囲内になる量であれば、特に限定されないが、
混練水中、０．００１〜０．５重量％の濃度で用いるの
が好ましい。The amount of the surfactant used is not particularly limited as long as the surface tension of the kneading water is within the above range.
It is preferably used at a concentration of 0.001 to 0.5% by weight in the kneading water.
【００１１】分散剤としては、ナフタレンスルホン酸塩
ホルムアルデヒド縮合物（ナフタレン系）、メラミンス
ルホン酸塩ホルムアルデヒド縮合物（メラミン系）、リ
グニンスルホン酸塩（リグニン系）、トリスフェノール
・アミノベンゼンスルホン酸塩共縮合物（トリスフェノ
ール系）、ポリアクリル酸共重合物（ポリカルボン酸
系）、ポリアルキレングリコール（メタ）アクリレート
共重合物（ポリエーテル系）等の各種分散剤を特に限定
することなく用いることができ、これらの中ではナフタ
レンスルホン酸塩ホルムアルデヒド縮合物が好ましい。Examples of the dispersant include naphthalene sulfonate formaldehyde condensate (naphthalene type), melamine sulfonate formaldehyde condensate (melamine type), lignin sulfonate (lignin type), and trisphenol / aminobenzene sulfonate. Various dispersants such as condensate (trisphenol-based), polyacrylic acid copolymer (polycarboxylic acid), and polyalkylene glycol (meth) acrylate copolymer (polyether) can be used without particular limitation. Of these, naphthalene sulfonate formaldehyde condensate is preferred.
【００１２】分散剤の使用量は、石膏１００重量部に対
して、０．０１〜５．０重量部が好ましく、０．０５〜
１．０重量部がより好ましい。The dispersant is preferably used in an amount of 0.01 to 5.0 parts by weight, preferably 0.05 to 5.0 parts by weight, per 100 parts by weight of gypsum.
1.0 parts by weight is more preferred.
【００１３】なお、本発明では、特に、界面活性剤とし
てアルキル硫酸エステル塩を、分散剤としてナフタレン
系分散剤を併用した際に、より優れた減水性の効果が得
られ、好ましい。In the present invention, when an alkyl sulfate salt is used in combination with a surfactant and a naphthalene-based dispersant is used in combination as a dispersant, a more excellent water reducing effect is obtained, which is preferable.
【００１４】石膏は、無水、半水、二水石膏等のいずれ
でもよいが、半水石膏が好ましい。The gypsum may be any of anhydrous, hemihydrate, gypsum and the like, but gypsum is preferred.
【００１５】本発明においては、石膏及び混練水ととも
に、必要に応じて、公知の添加剤を添加してもよい。添
加剤としては、分散剤、水溶性高分子、ＡＥ剤、遅延
剤、早強剤、促進剤、起泡剤、発泡剤、消泡剤、防水
剤、防錆剤、着色剤、防黴剤、ひびわれ低減剤、高分子
エマルジョン、膨張剤、繊維類、染料、顔料等が挙げら
れ、これらは単独で、または２種以上を併用して添加し
てもよい。In the present invention, known additives may be added together with the gypsum and the kneading water, if necessary. Additives include dispersants, water-soluble polymers, AE agents, retarders, fasteners, accelerators, foaming agents, foaming agents, defoamers, waterproofing agents, rust inhibitors, coloring agents, and fungicides , A crack reducing agent, a polymer emulsion, a swelling agent, fibers, a dye, a pigment, and the like. These may be added alone or in combination of two or more.
【００１６】以上に説明した石膏、混練水、添加剤等
を、ピンミキサー等を用いて混合することにより、石膏
スラリーとすることができる。混合時間は、石膏と混練
水とが十分に混ざり合う程度であれば特に限定されない
が、本発明に用いる混練水は表面張力が所定の範囲に調
整されているため、石膏粒子と水との濡れ性が高く、短
時間で石膏粒子をほぐすことができる。A gypsum slurry can be obtained by mixing the above-described gypsum, kneading water, additives and the like using a pin mixer or the like. The mixing time is not particularly limited as long as the gypsum and the kneading water are sufficiently mixed, but the kneading water used in the present invention has a surface tension adjusted to a predetermined range. Gypsum particles can be loosened in a short time.
【００１７】石膏と混練水の配合比は、石膏１００重量
部に対して、混練水が好ましくは４０〜１００重量部、
より好ましくは５０〜７０重量部である。The mixing ratio of gypsum and kneading water is preferably 40 to 100 parts by weight of kneading water with respect to 100 parts by weight of gypsum.
More preferably, it is 50 to 70 parts by weight.
【００１８】本発明により得られる石膏スラリーは、減
水性及び流動性に非常に優れているため、その特性を利
用して幅広い分野に用いることができるが、特に、石膏
ボード用、石膏プラスター等を製造する際には、水硬性
組成物の流動性と減水性の向上に用いることができる。The gypsum slurry obtained by the present invention is very excellent in water reducing property and fluidity, and can be used in a wide range of fields by utilizing its properties. Particularly, gypsum slurry for gypsum board, gypsum plaster and the like can be used. During production, it can be used to improve the fluidity and water reduction of the hydraulic composition.
【００１９】[0019]
【実施例】実施例１〜２０、比較例１〜１０ 半水石膏１０００ｇと表１、２に示す界面活性剤及び分
散剤を混合して得られる混練水６００ｇとを小型ピンミ
キサーに投入して、３００ｒ／ｍｉｎで５秒間混合し
て、石膏スラリーを調製し、その流動性を測定した。結
果を表１、２に示す。Examples 1 to 20, Comparative Examples 1 to 10 1000 g of hemihydrate gypsum and 600 g of kneading water obtained by mixing a surfactant and a dispersant shown in Tables 1 and 2 were put into a small pin mixer. The mixture was mixed at 300 r / min for 5 seconds to prepare a gypsum slurry, and its fluidity was measured. The results are shown in Tables 1 and 2.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表２】 [Table 2]
【００２２】〔界面活性剤〕 ・Ａ−１：ポリオキシエチレン（付加モル数：３）アル
キル硫酸エステルナトリウム（エマール２０Ｃ、花王
（株）製） ・Ａ−２；ドデシルベンゼンスルホン酸ナトリウム（ネ
オペレックスＦ−２５、花王（株）製） ・Ａ−３：ジアルキルスルホコハク酸ナトリウム（ペレ
ックスクＯＴＰ、花王（株）製） ・Ａ−４：ポリオキシエチレン（付加モル数：９）ノニ
ルフェニルエーテル（エマルゲン９０９、花王（株）
製） ・Ａ−５：ラウリルトリメチルアンモニウムクロライド
（コータミン２４Ｐ、花王（株）製） ・Ａ−６；ラウリルベタイン（アンヒトール２４Ｂ、花
王（株）製）[Surfactant] A-1: Sodium polyoxyethylene (number of moles added: 3) alkyl sulfate (Emal 20C, manufactured by Kao Corporation) A-2: Sodium dodecylbenzenesulfonate (Neoperex) F-25, manufactured by Kao Corporation) A-3: Sodium dialkylsulfosuccinate (Perexque OTP, manufactured by Kao Corporation) A-4: Polyoxyethylene (additional mole number: 9) nonylphenyl ether (Emulgen 909) , Kao Corporation
A-5: Lauryltrimethylammonium chloride (Coatamine 24P, manufactured by Kao Corporation) A-6: Lauryl betaine (Amphitol 24B, manufactured by Kao Corporation)
【００２３】〔分散剤〕 ・ＮＳ：ナフタレン系分散剤（マイテイ１５０、花王
（株）製） ・ＭＳ：メラミン系分散剤（マイテイ１５０Ｖ−２、花
王（株）製） ・ＰＣ：ポリエーテル系分散剤（マイテイ２１Ｇ、花王
（株）製） ・ＰＥ：ポリカルボン酸系分散剤（アクアロックＦＣ−
６００Ｓ：（株）日本触媒製）[Dispersant] NS: Naphthalene-based dispersant (Mighty 150, manufactured by Kao Corporation) MS: Melamine-based dispersant (Mighty 150V-2, manufactured by Kao Corporation) PC: Polyether-based dispersion (Mayty 21G, manufactured by Kao Corporation) PE: Polycarboxylic acid-based dispersant (Aqualoc FC-
600S: Nippon Shokubai Co., Ltd.)
【００２４】〔混練水の表面張力〕デュヌイ法により測
定する。[Surface tension of kneading water] It is measured by the Dunui method.
【００２５】〔流動性の評価〕直径５０ｍｍ×高さ５０
ｍｍのコーンに石膏スラリーを充填し、引き抜き後の拡
がり（ｍｍ）を測定する。なお、流動性が大きい程、減
水性が高いと判断しうる。[Evaluation of fluidity] diameter 50 mm × height 50
A plaster slurry is filled in a cone having a diameter of mm, and the spread (mm) after drawing is measured. In addition, it can be determined that the higher the fluidity, the higher the water reduction.
【００２６】以上の結果から明らかなように、比較例１
〜１０と対比して、所望の表面張力を有する混練水を用
いた実施例１〜２０の石膏スラリーは流動性が高く、減
水性に優れることが分かる。特に、界面活性剤及び分散
剤の両者を含む混練水を用いた実施例１〜１２では、よ
り一層の高い効果が得られる。As apparent from the above results, Comparative Example 1
It can be seen that the gypsum slurries of Examples 1 to 20 using the kneading water having a desired surface tension have a high fluidity and are excellent in water reduction, as compared with Comparative Examples 10 to 10. In particular, in Examples 1 to 12 using kneading water containing both a surfactant and a dispersant, even higher effects can be obtained.
【００２７】[0027]
【発明の効果】本発明により、減水性に優れた石膏スラ
リーを製造することができるとともに、かかる石膏スラ
リーは流動性に極めて優れることから、乾燥工程の短縮
による生産性の向上が期待される。According to the present invention, a gypsum slurry excellent in water reduction can be produced, and since such a gypsum slurry is extremely excellent in fluidity, improvement in productivity by shortening a drying step is expected.
Claims (4)
石膏とを少なくとも混合する石膏スラリーの製造方法。1. A method for producing a gypsum slurry in which at least kneading water having a surface tension of 40 to 60 mN / m and gypsum are mixed.
請求項１記載の石膏スラリーの製造方法。2. The method for producing a gypsum slurry according to claim 1, wherein the kneading water contains a dispersant and a surfactant.
る請求項２記載の石膏スラリーの製造方法。3. The method for producing a gypsum slurry according to claim 2, wherein the surfactant is an anionic surfactant.
分散剤がナフタレンスルホン酸塩ホルムアルデヒド縮合
物である請求項２記載の石膏スラリーの製造方法。4. The method according to claim 1, wherein the surfactant is an alkyl sulfate salt,
The method for producing a gypsum slurry according to claim 2, wherein the dispersant is a naphthalene sulfonate formaldehyde condensate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000264235A JP2002068820A (en) | 2000-08-31 | 2000-08-31 | Method for preparing gypsum slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000264235A JP2002068820A (en) | 2000-08-31 | 2000-08-31 | Method for preparing gypsum slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002068820A true JP2002068820A (en) | 2002-03-08 |
Family
ID=18751682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000264235A Withdrawn JP2002068820A (en) | 2000-08-31 | 2000-08-31 | Method for preparing gypsum slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002068820A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016060658A (en) * | 2014-09-17 | 2016-04-25 | 花王株式会社 | Foam-containing hydraulic composition |
| JP2016175837A (en) * | 2006-11-02 | 2016-10-06 | ユナイテッド・ステイツ・ジプサム・カンパニー | Lightweight gypsum board |
| US20180029935A1 (en) * | 2015-03-17 | 2018-02-01 | Kao Corporation | Dispersant composition for hydraulic composition |
-
2000
- 2000-08-31 JP JP2000264235A patent/JP2002068820A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016175837A (en) * | 2006-11-02 | 2016-10-06 | ユナイテッド・ステイツ・ジプサム・カンパニー | Lightweight gypsum board |
| JP2016060658A (en) * | 2014-09-17 | 2016-04-25 | 花王株式会社 | Foam-containing hydraulic composition |
| US20180029935A1 (en) * | 2015-03-17 | 2018-02-01 | Kao Corporation | Dispersant composition for hydraulic composition |
| US10322967B2 (en) * | 2015-03-17 | 2019-06-18 | Kao Corporation | Dispersant composition for hydraulic composition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106458752B (en) | Water cure composition carbon retarding agent | |
| US10435332B2 (en) | Method for preparing hydraulic composition | |
| JP2811336B2 (en) | New cement dispersant | |
| CN102093521B (en) | Method for preparing polycarboxylic acid high slump retaining agent | |
| JP2003525190A (en) | Air management in cementitious mixtures with plasticizers and clay active modifiers | |
| CN106279561B (en) | A kind of viscosity reduction type poly carboxylic acid series water reducer for high performance concrete | |
| CN105399363B (en) | A kind of high-flowing concrete additive and preparation method thereof | |
| US6172147B1 (en) | Additive for production of highly workable mortar cement | |
| JP3719706B2 (en) | Dispersant for gypsum slurry | |
| CN107814886A (en) | A kind of defoaming type polycarboxylate water-reducer and preparation method thereof | |
| CN106397683A (en) | Polycarboxylate superplasticizer for reducing viscosity of high-grade concrete and preparation method thereof | |
| CN114315209B (en) | Preparation method of fluorocarbon-containing viscosity-reducing polycarboxylate superplasticizer | |
| JP2002068820A (en) | Method for preparing gypsum slurry | |
| CN109399990A (en) | A kind of polycarboxylate water-reducer matching preparation method for subtracting jelly | |
| CN104961866A (en) | Carboxylic acid water-reducing agent modified by multiamino fibers and preparation method thereof | |
| KR20110082858A (en) | Additive composition of skim coat mortar and skim coat mortar composition having the additive composition | |
| JPH1053448A (en) | Cement admixture and cemental composition for molding | |
| CN103693986B (en) | A kind of foaming insulation board specialized superfine cement matrix and application thereof | |
| JPH0543286A (en) | Production of cement-based slurry composition | |
| JPH0558696A (en) | Additive for cement and production of concrete using the same | |
| JP2994952B2 (en) | Bubble entrainer for concrete | |
| JP2006083001A (en) | Admixing agent for hydraulic composition | |
| JP3759432B2 (en) | Dispersant for hydraulic composition | |
| JP2007197287A (en) | Cement admixture | |
| JP2002356357A (en) | Mortar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A761 | Written withdrawal of application |
Free format text: JAPANESE INTERMEDIATE CODE: A761 Effective date: 20050526 |