JPS5917065B2 - plaster composition - Google Patents
plaster compositionInfo
- Publication number
- JPS5917065B2 JPS5917065B2 JP975077A JP975077A JPS5917065B2 JP S5917065 B2 JPS5917065 B2 JP S5917065B2 JP 975077 A JP975077 A JP 975077A JP 975077 A JP975077 A JP 975077A JP S5917065 B2 JPS5917065 B2 JP S5917065B2
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- hemihydrate
- dust
- water
- substance
- 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
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】
本発明は取扱いに際して粉じんの立たない石膏組成物に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gypsum composition that does not raise dust when handled.
歯科用、整形外科用、彫塑用あるいは陶芸用等の石膏型
をつくるために少量の焼石膏が取扱われることが多いが
、これらの型取り用の焼石膏は微粉末であって粉じんを
発生し易く、シかも石膏の粉じんは刺激性があり人体に
有害でありたとえマスクを着用しても気管に刺激あるい
は炎症が生ずることが間々ある。Small amounts of calcined gypsum are often used to make plaster molds for dental, orthopedic, sculptural, and pottery applications, but the calcined gypsum used for making these molds is a fine powder and does not generate dust. Gypsum dust is irritating and harmful to the human body, and even if a mask is worn, it can sometimes cause irritation or inflammation of the trachea.
またこれらの型取り作業は比較的清潔な室内で行なわれ
ることが多く石膏の粉じんが室内に飛散することは甚だ
好ましくない。Furthermore, these mold-making operations are often carried out in a relatively clean room, and it is extremely undesirable for plaster dust to be scattered inside the room.
本発明はこのような石膏取扱いにおける粉じんの発生を
完全に防止し便利且つ衛生的に石膏型（成形物）を作製
することを得る型用石膏組成物を提供し、今一つは石膏
の粉塵の発生の抑止された石膏の取扱い方法を提供する
ものである。The present invention provides a gypsum composition for molds that completely prevents the generation of dust during the handling of gypsum and allows convenient and hygienic production of gypsum molds (moldings). The present invention provides a method for handling gypsum that suppresses
すなわち本発明に成る石膏組成物は焼石膏（半水石膏）
粉末に実質的に水を含まない湿潤性物質を添加してなる
ことを特徴とする取扱時において粉じんを発生しない粉
状の石膏組成物である。That is, the gypsum composition of the present invention is calcined gypsum (hemihydrate gypsum).
This is a powdery gypsum composition that does not generate dust when handled, and is made by adding a wettable substance that does not substantially contain water to the powder.
半水石膏（焼石膏とも呼ばれる）は製造の条件によって
α型半水石膏、β型半水石膏ないしはα型およびβ型の
混合型の半水石膏等様々のものがあるが、その何れであ
っても本発明に使用することができる。There are various types of gypsum hemihydrate (also called calcined gypsum) depending on the manufacturing conditions, such as α-type gypsum hemihydrate, β-type gypsum hemihydrate, or a mixed type of α-type and β-type gypsum hemihydrate. can also be used in the present invention.
湿潤性物質としては揮発性のすくないこと、水をはじか
ないこと、すなわち水を加えたとき石膏の分散を妨げな
いものであること、および毒性を持たないものが望まし
く、また当然のこととして石膏と反応しないこと、およ
び石膏の硬化を妨害しないことが必要である。It is desirable that the wettability substance be low volatility, non-repellent, meaning that it does not interfere with the dispersion of gypsum when water is added, and non-toxic. It is necessary not to react and not to interfere with the hardening of the plaster.
このような目的に適合する湿潤剤およびその配合剤とし
てたとえばエチレングリコール、プロピレングリコール
、グリセリン、エチルセロソルブ等の多価アルコール類
を半水石膏に対して０．５〜１０重量％添加したものが
推奨される。As wetting agents and their compounding agents suitable for such purposes, we recommend adding polyhydric alcohols such as ethylene glycol, propylene glycol, glycerin, and ethyl cellosolve in an amount of 0.5 to 10% by weight based on gypsum hemihydrate. be done.
焼石膏に対してこれらの湿潤剤を配合するには焼石膏上
に適当量の湿潤剤を粉霧ししかる後均−混合しても目的
は達せられる。In order to incorporate these wetting agents into the calcined gypsum, the purpose can be achieved by spraying an appropriate amount of the wetting agent onto the calcined gypsum and then homogenizing and mixing.
本発明による石膏組成物の使用方法は、使用に際して水
を加えること、よく混和して注型硬化させること等従来
の石膏の使用と何ら異ることなく硬化体の性状もまた同
じでありしかも使用時袋から取出したり、計量したり、
容器に移したり、水を注いだりする場合に昼いて全く粉
じんを発生することが無くこれらの作業においてマスク
の着用は全く必要なく極めて衛生的であって石膏使用者
に多大の福音を与えるものである。The method of using the gypsum composition according to the present invention is no different from the use of conventional gypsum, such as adding water, mixing well, and casting and hardening, and the properties of the cured product are the same. Take it out of the bag, weigh it,
When transferring to a container or pouring water, no dust is generated during the day, and there is no need to wear a mask during these operations, making it extremely hygienic and providing great news to plaster users. be.
実施例 １
市販の型用石膏（α石膏）５００部にたいして１０部の
エチルアルコールを添加し長時間振り混ぜることにより
エチルアルコールが均一にいきわたるようにした。Example 1 10 parts of ethyl alcohol was added to 500 parts of commercially available mold plaster (α-gypsum), and the mixture was shaken for a long time so that the ethyl alcohol was uniformly distributed.
このものはやや湿り気を帯びた粉状体であって取扱いに
あたって全く粉じんを発生することがなくかつこれを水
と練ったときの硬化の有様および硬化成型物の性状はも
とのものとほとんど異るところはなかった。This product is a slightly moist powder that does not generate any dust when handled, and when mixed with water, the hardening behavior and the properties of the hardened molded product are almost the same as the original. There was nothing different.
実施例 ２
実Ｍ例１のエチルアルコール１０部をエチレングリコー
ル１０部に置きかえた粉状の石膏組成物を調整した。Example 2 A powdered gypsum composition was prepared by replacing 10 parts of ethyl alcohol in Example 1 with 10 parts of ethylene glycol.
このものは実施例１の組成物と同様に袋から取出してボ
ール等の容器に移す際にも全く粉じんを発生し々かった
。Similar to the composition of Example 1, this product generated a lot of dust even when it was taken out of the bag and transferred to a container such as a bowl.
また、アルコール臭その他の臭気をほとんど放たなかっ
た。In addition, almost no alcohol odor or other odor was emitted.
さらに、これに水を加える際、および水と練り混ぜる際
にも全く粉じんは発生せず、水と練り混ぜたものの硬化
の有様および硬化放生物の性状も実施例１およびエチレ
ングリコールを加えないもとの半水石膏を水と練った場
合と同様であった。Furthermore, no dust was generated when adding water or mixing with water, and the state of hardening of the mixture mixed with water and the properties of the cured product were similar to those in Example 1 without the addition of ethylene glycol. It was the same as when the original gypsum hemihydrate was mixed with water.
Claims (1)
ことを特徴とする粉状石膏組成物。 ２ 湿潤性物質が、エチレングリコール、プロピレング
リコール、グリセリン、エチルセロソルブより成る群か
ら選ばれる少くとも１種の物質であり、この湿潤性物質
を半水石膏に対して０．５〜１０重量％添加してなるこ
とを特徴とする特許請求の範囲第１項記載の石膏組成物
。[Scope of Claims] 1. A powdered gypsum composition characterized by adding a water-free wettable substance to hemihydrate gypsum. 2. The wettability substance is at least one substance selected from the group consisting of ethylene glycol, propylene glycol, glycerin, and ethyl cellosolve, and this wettability substance is added in an amount of 0.5 to 10% by weight based on gypsum hemihydrate. The gypsum composition according to claim 1, characterized in that it is made of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP975077A JPS5917065B2 (en) | 1977-02-02 | 1977-02-02 | plaster composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP975077A JPS5917065B2 (en) | 1977-02-02 | 1977-02-02 | plaster composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5396027A JPS5396027A (en) | 1978-08-22 |
| JPS5917065B2 true JPS5917065B2 (en) | 1984-04-19 |
Family
ID=11728966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP975077A Expired JPS5917065B2 (en) | 1977-02-02 | 1977-02-02 | plaster composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5917065B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010502866A (en) * | 2006-09-07 | 2010-01-28 | ユナイテッド・ステイツ・ジプサム・カンパニー | Soundproof panel with reduced dust |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577852A (en) * | 1980-06-18 | 1982-01-16 | Kurosaki Refractories Co | Cement blend dust generation prevention |
| JPS57149856A (en) * | 1981-02-24 | 1982-09-16 | Nitsutou Setsukou Kk | Gypsum formed body |
| US6267962B1 (en) | 1990-12-21 | 2001-07-31 | C-P Technology Limited Partnership | Compositions and methods of treatment using peat derivatives |
| SG11202002473SA (en) * | 2017-10-05 | 2020-04-29 | Yoshino Gypsum Co Ltd | Gypsum-based investment material composition for casting, and method for manufacturing gypsum-based investment material composition for casting |
-
1977
- 1977-02-02 JP JP975077A patent/JPS5917065B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010502866A (en) * | 2006-09-07 | 2010-01-28 | ユナイテッド・ステイツ・ジプサム・カンパニー | Soundproof panel with reduced dust |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5396027A (en) | 1978-08-22 |
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