ステアリン酸カルシウム 化学特性,用途語,生産方法
外観
白色～ほとんど白色, 粉末
定義
本品は、ステアリン酸(*)のカルシウム塩であり、次の化学式で表される。
参照表示名称：ステアリン酸
溶解性
水、エタノール、エーテルに不溶。熱エタノールに難溶。熱ベンゼン、熱石油ベンジン、熱テレビン油に可溶。
用途
塩化ビニル安定剤、セメント防水剤
用途
滑剤、安定剤、MOCVD法や塗布熱分解法による超伝導薄膜作製。衣料、セメント、シックイの防水剤、プラスチック工業における離型剤、潤滑剤、グリース添加剤、鉛筆、クレヨンの原料、ラッカーパテの製造。
化粧品の成分用途
非水系増粘剤、抗ケーキング剤、乳化安定剤、着色剤
効能
錠・カプセル潤滑剤
主な用途／役割
金属石けん。主に硬質用。
化学的特性
Calcium stearate occurs as a fine, white to yellowish-white, bulky powder having a slight, characteristic odor. It is unctuous and free from grittiness. It is found in some lubricants and surfactants.
製造方法
Calcium stearate is produced by heating stearic acid, a fatty acid, and calcium oxide:
2C
17H
35COOH + CaO→(C
17H
35COO)
2Ca + H
2O
It is also the main component of soap scum, a white solid that forms when soap is mixed with hard water. Unlike soaps containing sodium and potassium, calcium stearate is insoluble in water and does not lather well . Commercially it is sold as a 50 % dispersion in water or as a spray dried powder. As a food additive it is known by the generic E number E470. .
調製方法
Calcium stearate is prepared by the reaction of calcium chloride
with a mixture of the sodium salts of stearic and palmitic acids. The
calcium stearate formed is collected and washed with water to
remove any sodium chloride.
主な応用
Calcium stearate is used as a flow agent in powders including some foods (such as Smarties), a surface conditioner in hard candies such as Sprees, a waterproofing agent for fabrics, a lubricant in pencils and crayons.
The concrete industry uses calcium stearate for efflorescence control of cementitious products used in the production of concrete masonry units i.e. paver and block, as well as waterproofing.
In paper production, calcium stearate is used as a lubricant to provide good gloss, preventing dusting and fold cracking in paper and paperboard making.
In plastics, it can act as an acid scavenger or neutralizer at concentrations up to 1000ppm, a lubricant and a release agent. It may be used in plastic colorant concentrates to improve pigment wetting. In rigid PVC, it can accelerate fusion, improve flow, and reduce die swell.
Applications in the personal care and pharmaceutical industry include tablet mold release, anti-tack agent, and gelling agent.
Calcium stearate is a component in some types of defoamers.
危険性
A nuisance dust.
応用例（製薬）
Calcium stearate is primarily used in pharmaceutical formulations
as a lubricant in tablet and capsule manufacture at concentrations
up to 1.0% w/w. Although it has good antiadherent and lubricant
properties, calcium stearate has poor glidant properties.
Calcium stearate is also employed as an emulsifier, stabilizing
agent, and suspending agent, and is also used in cosmetics and food
products.
安全性プロファイル
A nuisance dust. When
heated to decomposition it emits acrid
smoke and irritating fumes.
安全性
Calcium stearate is used in oral pharmaceutical formulations and is
generally regarded as a relatively nontoxic and nonirritant material.
貯蔵
Calcium stearate is stable and should be stored in a well-closed
container in a cool, dry place.
規制状況(Regulatory Status)
GRAS listed. Included in the FDA Inactive Ingredients Database
(oral capsules and tablets). Included in nonparenteral medicines
licensed in the UK. Included in the Canadian List of Acceptable
Non-medicinal Ingredients.
ステアリン酸カルシウム 上流と下流の製品情報
原材料
準備製品