JP2869173B2 - Gypsum-based adhesive admixture - Google Patents
Gypsum-based adhesive admixtureInfo
- Publication number
- JP2869173B2 JP2869173B2 JP24779990A JP24779990A JP2869173B2 JP 2869173 B2 JP2869173 B2 JP 2869173B2 JP 24779990 A JP24779990 A JP 24779990A JP 24779990 A JP24779990 A JP 24779990A JP 2869173 B2 JP2869173 B2 JP 2869173B2
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- present
- water
- admixture
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Paints Or Removers (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は石膏成形品用の石膏系接着材用混和剤、更に
詳しくは半水石膏を主原料とする石膏ラスボード用接着
材に関し、その混練り水を著しく減じ、且つ下地への接
着力を向上させる石膏成形品用の石膏系接着材用混和剤
に関するものである。The present invention relates to an admixture for a gypsum-based adhesive for a gypsum molded product, and more particularly to an adhesive for a gypsum lathboard using hemihydrate gypsum as a main raw material. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gypsum-based adhesive admixture for gypsum molded articles, which significantly reduces kneading water and improves adhesive strength to a substrate.
一般に、石膏ラスボードを被着体とする接着材は半水
石膏を主原料に水溶性高分子や硬化遅延剤を配合したも
ので、現場施工時に水を加えて練り、鏝で下地に塗りつ
けるものであり、高層建築物に於いては混練り水の運搬
に労力を要している。また、接着材の自重が大きいこと
から下地材であるベニヤ、スレート、金属、ガラスなど
に対して接着性が悪く、用途が限定されている状況であ
る。これらの対策として、混練り水の減少や接着材の比
重を低下させる目的で分散剤の配合や軽量骨材の配合が
検討されているが有効な方法は見出されていない。Generally, the adhesive with gypsum lathboard as the adherend is a mixture of water-soluble polymer and hardening retarder with gypsum hemihydrate as the main raw material. Yes, high-rise buildings require labor to transport the mixing water. In addition, the self-weight of the adhesive is large, so that it has poor adhesion to the base material such as veneer, slate, metal, glass, and the like, and its use is limited. As a countermeasure for this, blending of a dispersing agent or lightweight aggregate has been studied for the purpose of reducing kneading water and reducing the specific gravity of the adhesive, but no effective method has been found.
本発明は石膏成形品接着材の混練り水を低減し、且つ
軽量化による接着性の改善を可能にする石膏成形品接着
材用混和剤を提供するものである。SUMMARY OF THE INVENTION The present invention provides an admixture for a gypsum molded article adhesive, which can reduce kneading water of the gypsum molded article adhesive and can improve adhesiveness by reducing the weight.
本発明による混和剤は、石膏成形品組成物の流動性向
上による減水率の増大、且つ気泡連行による比重調整に
伴う施工時の接着性の改善を目的とするものである。The admixture according to the present invention is intended to increase the water reduction rate by improving the flowability of the gypsum molded article composition, and to improve the adhesion at the time of construction accompanying the adjustment of the specific gravity by entrainment of air bubbles.
本発明者らは、上記目的を解決するために石膏成形品
接着材組成物、即ち半水石膏及び水溶性高分子などの水
系に各種分散剤や界面活性剤を加え、鋭意研究した結
果、スルホン酸基を有しているメラミンホルムアルデヒ
ド縮合物とアルキル硫酸アルカリ塩との混合物が極めて
有効であることを見出し、本発明を完成するに到った。In order to solve the above-mentioned object, the present inventors have added various dispersants and surfactants to a gypsum molded article adhesive composition, that is, an aqueous system such as gypsum hemihydrate and a water-soluble polymer. They have found that a mixture of a melamine formaldehyde condensate having an acid group and an alkali alkyl sulfate is extremely effective, and have completed the present invention.
本発明による混和剤の特徴は特定の分散剤と特定の起
泡剤とを併用使用することであり、その効果は分散剤に
よる減水効果と起泡剤による気泡ベアリング効果とによ
る減水効果、更に比重の低下調整による施工時の接着性
改善等である。The feature of the admixture according to the present invention is that a specific dispersant and a specific foaming agent are used in combination, and the effect thereof is a water reducing effect by a water reducing effect by the dispersant and a bubble bearing effect by the foaming agent, and a specific gravity. The improvement of the adhesiveness at the time of construction by the adjustment of the decrease of the temperature.
本発明混和剤のスルホン酸基を有しているメラミンホ
ルムアルデヒド縮合物とアルキル硫酸アルカリ塩との配
合割合を、スルホン酸含有メラミンホルムアルデヒド縮
合物70〜98重量部とアルキル硫酸アルカリ塩２〜30重量
部にすることにより、顕著な効果を示す。The blending ratio of the sulfonic acid group-containing melamine formaldehyde condensate and the alkylsulfate alkali salt of the admixture of the present invention is 70 to 98 parts by weight of the sulfonic acid-containing melamine formaldehyde condensate and 2 to 30 parts by weight of the alkylsulfate alkali salt. Has a remarkable effect.
本発明で使用するスルホン酸基を有しているメラミン
ホルムアルデヒド縮合物とはメラミンホルムアルデヒド
縮合物を酸性亜硫酸塩、亜硫酸塩等で反応させたもの、
あるいは、更にホルマリン縮合させたものであり、ホル
ムアルデヒドの付加モル数やスルホン酸基量は特に限定
しない。The melamine formaldehyde condensate having a sulfonic acid group used in the present invention is a melamine formaldehyde condensate reacted with an acid sulfite, a sulfite, or the like,
Alternatively, it is further subjected to formalin condensation, and the number of moles of formaldehyde added and the amount of sulfonic acid groups are not particularly limited.
また、本発明に使用するスルホン酸基を有しているメ
ラミンホルムアルデヒド縮合物の平均分子量は1000から
50000の範囲が好ましく、5000〜20000程度がより好まし
い。The average molecular weight of the melamine formaldehyde condensate having a sulfonic acid group used in the present invention is from 1,000.
The range is preferably 50,000, more preferably about 5,000 to 20,000.
本発明で使用するアルキル硫酸アルカリ塩とはアルキ
ル基の炭素数で８から18の飽和、不飽和炭化水素基が挙
げられる。また、アルカリ塩としては特に限定するもの
ではないが、ナトリウム塩、カリウム塩が好ましい。The alkylsulfate alkali salt used in the present invention includes a saturated or unsaturated hydrocarbon group having 8 to 18 carbon atoms in the alkyl group. The alkali salt is not particularly limited, but a sodium salt and a potassium salt are preferable.
本発明に使用される半水石膏とは、一般に製造されて
いる、例えば天然石膏、リン酸副生石膏、チタン副生石
膏、排煙脱硫石膏等を110〜120℃で焼結して得られるも
のである。The hemihydrate gypsum used in the present invention is generally obtained, for example, natural gypsum, phosphoric acid by-product gypsum, titanium by-product gypsum, flue gas desulfurization gypsum and the like obtained by sintering at 110 to 120 ° C. is there.
水溶性高分子としては、特に限定するものではない
が、非イオン性セルローズエーテルやポリビニルアルコ
ール等が好ましい。The water-soluble polymer is not particularly limited, but nonionic cellulose ether, polyvinyl alcohol and the like are preferable.
非イオン性セルローズエーテルとしては、メチルセル
ローズ、ヒドロキシプロピルメチルセルローズ、ヒドロ
キシエチルメチルセルローズ、ヒドロキシジエチルセル
ローズ、ヒドロキシエチルセルローズ、ヒドロキシプロ
ピルセルローズなどが使用される。Examples of the nonionic cellulose ether include methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, hydroxydiethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and the like.
本発明混和剤において、石膏系接着材とは半水石膏を
主原料とし、水溶性高分子、骨材及び繊維等も加えるこ
ともできるものである。更に必要に応じて硬化遅延剤を
配合して硬化時間を調節することもできる。In the admixture of the present invention, the gypsum-based adhesive is a hemihydrate gypsum as a main raw material, to which water-soluble polymers, aggregates, fibers and the like can be added. Further, if necessary, a curing retarder can be added to adjust the curing time.
本発明による混和剤は予め石膏成形品接着材とのドラ
イブレンドによる方法、あるいは混練り時に水と同時、
あるいは水に溶解して使用する方法等のいずれの方法で
もよい。The admixture according to the present invention is a method by dry blending with a gypsum molded article adhesive in advance, or simultaneously with water at the time of kneading,
Alternatively, any method such as dissolving in water for use may be used.
以下、実施例により本発明を説明するが、本発明はこ
れらの実施例に限定されるものではない。Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.
石膏成形品接着材を表−１の配合とした。 The adhesive for the gypsum molded article was formulated as shown in Table 1.
実施例に使用した本発明による混和剤の内容を表−２
に示す。 Table 2 shows the content of the admixture according to the present invention used in the examples.
Shown in
表−１の接着剤組成物に表−２の混和剤と水とを添加
し、JIS−Ｒ−5201のセメント物理試験方法に準じて、
モルタルフロー値（流動性）が一定（200〜220mm）にな
る水量と比重の測定を行った。 The admixture and water of Table 2 were added to the adhesive composition of Table 1, and according to the cement physical test method of JIS-R-5201,
The amount of water and the specific gravity at which the mortar flow value (fluidity) became constant (200 to 220 mm) were measured.
結果を表−３に示す。 The results are shown in Table-3.
表−３に示すように、本発明による混和剤は、比較品
に比べて、水量の減少が大きく、優れた減水効果を示し
ており、しかも、比重についても比較品より低いので、
施工時の自重による落下防止効果は明白であることが判
る。 As shown in Table-3, the admixture according to the present invention has a large reduction in water amount and shows an excellent water reducing effect as compared with the comparative product, and also has a lower specific gravity than the comparative product.
It can be seen that the effect of preventing falling due to its own weight during construction is clear.
本発明による石膏成形品接着材用混和剤は、半水石膏
及び水溶性高分子などの水系に添加することにより、混
練り水の低減と軽量化による接着性の改善とを可能にす
る。The admixture for an adhesive for a gypsum molded article according to the present invention, when added to an aqueous system such as hemihydrate gypsum and a water-soluble polymer, enables reduction of kneading water and improvement of adhesiveness by weight reduction.
Claims (1)
デヒド縮合物98〜70重量部とアルキル硫酸アルカリ金属
塩２〜30重量部とを必須成分とすることを特徴とする石
膏系接着材用混和剤。1. An admixture for a gypsum-based adhesive, comprising 98 to 70 parts by weight of a melamine formaldehyde condensate having a sulfonic acid group and 2 to 30 parts by weight of an alkali metal alkyl sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24779990A JP2869173B2 (en) | 1990-09-17 | 1990-09-17 | Gypsum-based adhesive admixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24779990A JP2869173B2 (en) | 1990-09-17 | 1990-09-17 | Gypsum-based adhesive admixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04130074A JPH04130074A (en) | 1992-05-01 |
| JP2869173B2 true JP2869173B2 (en) | 1999-03-10 |
Family
ID=17168829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24779990A Expired - Lifetime JP2869173B2 (en) | 1990-09-17 | 1990-09-17 | Gypsum-based adhesive admixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2869173B2 (en) |
-
1990
- 1990-09-17 JP JP24779990A patent/JP2869173B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04130074A (en) | 1992-05-01 |
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