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![полиизобутилен структурированное изображение](/CAS/20180906/GIF/9003-27-4.gif)
полиизобутилен
- английское имяPolyisobutylene
- CAS №9003-27-4
- CBNumberCB8147859
- ФормулаC4H8
- мольный вес56.10632
- EINECS618-360-8
- номер MDLMFCD00084436
- файл Mol9003-27-4.mol
химическое свойство
Температура плавления | 54-56 °C |
Температура кипения | 300 °C |
плотность | 0.92 g/mL at 25 °C (lit.) |
Tg | -61 |
Tg | -62 |
Tg | -64 |
Tg | -75 |
показатель преломления | n |
Fp | >212 |
Fp | >482 |
форма | slab/chunk |
Вязкость | 1.08 - 1.43(Intrinsic viscosity) |
Вязкость | 2.42 - 3.00(Intrinsic viscosity) |
Вязкость | 250cp (20C) |
Вязкость | 3.90 - 5.05(Intrinsic viscosity) |
Стабильность | Stability Combustible. Incompatible with strong oxidizing agents. |
InChI | InChI=1S/C4H8/c1-4(2)3/h1H2,2-3H3 |
ИнЧИКей | VQTUBCCKSQIDNK-UHFFFAOYSA-N |
SMILES | C=C(C)C |
Вещества, добавляемые в пищу (ранее EAFUS) | POLYISOBUTYLENE (MIN M W 37,000) |
FDA 21 CFR | 172.615; 175.125; 175.300 |
Рейтинг продуктов питания EWG | 1 |
FDA UNII | POLYISOBUTYLENE (1300 MW) (241BN7J12Y) POLYISOBUTYLENE (2600000 MW) (4GAS6381TX) POLYISOBUTYLENE (85000 MW) (7X53O5S2ZY) POLYISOBUTYLENE (1000 MW) (5XB3A63Y52) POLYISOBUTYLENE (75000 MW) (596C33NS2J) |
Система регистрации веществ EPA | Polyisobutylene (9003-27-4) |
больше
Заявления о безопасности | 24/25 |
WGK Германия | 3 |
RTECS | UD1010000 |
TSCA | TSCA listed |
кода HS | 39022000 |
Банк данных об опасных веществах | 9003-27-4(Hazardous Substances Data) |
полиизобутилен химические свойства, назначение, производство
Химические свойства
Polyisobutylene is composed of long-chain hydrocarbon formed by polymerization of isobutene, and is extremely stable under normal conditions. It is transparent non-noxious high-consistency semi-solid polymer free of impurities.Использование
polyisobutene (hydrogenated) is an emollient.Polyisobutylene, sometimes called butyl rubber, and other times PIB, is a vinyl polymer. It's very similar to polyethylene and polypropylene in structure, except that every other carbon is substituted with two methyl groups. It is made from the monomer isobutylene, by cationic vinyl polymerization.
Polyisobutylene is a synthetic rubber, or elastomer. It's special because it's the only rubber that's gas impermeable. That is, it's the only rubber that can hold air for long periods of time. You may have noticed that balloons will go flat after a few days. This is because they are made of polyisoprene, which is not gas impermeable. Because polyisobutylene will hold air, it is used to make things like the inner tubes, liner layers of tires, and the inner liners of basketballs.
Определение
ChEBI: A polymer composed of repeating 1,1-dimethylethylene units.Подготовка
Silicone rubbers are prepared as follows:![Preparation of Silicone rubbers](https://www.chemicalbook.com/NewsImg/2020-02-21/202022121235511442.jpg)
Other groups may replace the methyl groups. Silicone rubbers have excellent ozone and weathering resistance, good electrical properties, and good adhesion to metal.
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