ポリテルペン

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Danger

• 危険有害性情報

  H226：引火性の液体および蒸気

  H304：飲み込んで気道に侵入すると生命に危険のおそ れ

  H315：皮膚刺激

  H335：呼吸器への刺激のおそれ

  H412：長期的影響により水生生物に有害

• 注意書き

  P210：熱/火花/裸火/高温のもののような着火源から遠ざ けること。－禁煙。

  P273：環境への放出を避けること。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P301+P310：飲み込んだ場合：直ちに医師に連絡すること。

  P303+P361+P353：皮膚（または髪）に付着した場合：直ちに汚染された衣 類をすべて脱ぐこと/取り除くこと。皮膚を流水/シャワー で洗うこと。

  P331：無理に吐かせないこと。

ポリテルペン 価格

ポリテルペン 化学特性,用途語,生産方法

• 定義

  本品は、イソプレンの重合体であり、次の化学式で表される。

• 性質

  ポリイソプレノイドともいう．イソプレン単位が多数鎖状結合した不飽和炭化水素またはアルコールの総称．イソプレン単位が8個のカロテノイド，11個のウンデカプレノール，16～20個のドリコール，100個程度で二重結合がトランス形のグタペルカ，シス形で10000個程度の天然ゴムなどがある．
  森北出版「化学辞典（第2版）

• 化粧品の成分用途

  非水系増粘剤

• 説明

  Polyisoprene is the polymer known as natural rubber, although it can also be manufactured. The natural rubber latex is harvested from the rubber tree, Hevea brasiliensis. This substance has a variety of natural additives, such as proteins and sugars. The polymer from the natural latex is resistant to many solvents and also is easily processed. The synthetic form of this rubber is produced from a pure isoprene solution with a stereospecific isomer to produce the more commonly used cis-l,4 isomer. These rubbers are resistant to abrasion and most solvents and are commercially used in automobile tires, adhesives, and a variety of products that come in close contact with the general public. Their use in baby bottle nipples is a good indication of the extremely low toxicity associated with these elastomers.
  

• 化学的特性

  There are two main solvents for rubber: turpentine and naptha (petroleum). Because rubber does not dissolve easily, the material is finely divided by shredding prior to immersion. Natural rubber has been partially replaced by synthetics, particularly styrene–butadiene, as a generalpurpose rubber. High resilience, low heat buildup, and easy processing are particular advantages of natural rubber when it is often used in blends with synthetic polyisoprene and other elastomers. Natural rubber, alone and in combination with neoprene, has been rated highly for resistance to water, dimethyl sulfoxide, and some alcohols in a comparative test of glove materials; resistance to other solvents varied from good to poor. Polyisoprene supports combustion.

• 使用

  Natural rubber is a vital, strategic, and irreplaceable raw material used in enormous quantities by the commercial, medical, transportation, and defense industries. At least 40,000 different products and over 400 medical devices contain natural rubber.

• 定義

  The major component of natural rubber, also made synthetically. Forms are stereospecific cis-1,4and trans-1,4-polyisoprene.Both can be produced synthetically by the effect of heat and pressure on isoprene in the presence of stereospecific catalysts. Nat

• 調製方法

  The latex of natural rubber is obtained from trees (Hevea brasiliensis); the actual monomer is isopentenyl pyrophosphate that has been formed by biosynthesis. Natural rubber contains low-molecular-weight impurities; small amounts of sugar, fatty acids, proteins, and trace metals all play an important part in processing.
  Depending on the catalyst, rubber may undergo 1,2-; 3,4-; or 1,4- additional polymerization that leads to several isomeric structures.
  Almost all commercial synthetic polyisoprenes are prepared from purified isoprene monomer by a solution process. A stereospecific catalyst, such as an Al–Ti Ziegler type, is required for direct polymerization to the cis-1,4 isomer.
  The production of the finished polymer requires two separate manufacturing processes: (a) formation of the rawpolymer and (b) conversion of the polymer to the finished rubber product. The first step is similar to that of plastic production. Large-scale operations use bulk materials in an enclosed system.

• 一般的な説明

  Available as part of Negative Photoresist kit 654892

• 工業用途

  Rubber is characterized as being a highly elastic or resilient material, and the natural product is obtained mainly as a latex from cuts in the trunks of the Hevea brasiliensis tree. The latex consists of small particles (averaging about 2500 ? units in diameter) of rubber suspended in an aqueous medium (at about 35% solids content). The system also contains about 6 to 8% nonrubber constituents, some of which are emulsifiers, naturally occurring antioxidants, and proteins.
  Natural rubber is used for making many types of articles. Because of its abrasion-resistant quality and low hysteresis in reinforced compounds, it is used in truck-tire tread stocks and in conveyor belts that which are employed in conveying abrasive material such as coal, crushed rock, ore, and cinders. In large tires, it has found application in carcass compounds because of the tack and building qualities of the raw polymer. It has also been used in carcass compounds because of the low heat buildup (low hysteresis) of the carcass compound vulcanizate during severe service conditions in tire usage.

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