poly(isobutylene) standard 856000
Poly(isobutylene)
CAS: 9003-27-4
Molecular Formula: C4H8
poly(isobutylene) standard 856000 - Names and Identifiers
poly(isobutylene) standard 856000 - Physico-chemical Properties
| Molecular Formula | C4H8 |
| Molar Mass | 56.10632 |
| Density | 0.92 g/mL at 25 °C (lit.) |
| Melting Point | 54-56 °C |
| Boling Point | 300 °C |
| Appearance | slab/chunk |
| Storage Condition | Room Temprature |
| Stability | Stability Combustible. Incompatible with strong oxidizing agents. |
| Refractive Index | n20/D 1.51 |
| Physical and Chemical Properties | Colorless to pale yellow viscous liquid or elastic rubber-like semi-solid (low molecular weight is soft and gelatinous, high molecular weight is tough and elastic). All tasteless, odorless or slightly peculiar. The average molecular weight is 200,000~87 million. Soluble in benzene and diisobutylene, miscible with polyvinyl acetate, wax, etc., insoluble in polar solvents such as water and alcohol. It can make gum sugar have excellent flexibility at low temperature, and have certain plasticity at high temperature to make up for the shortcomings of polyvinyl acetate when cold, hot weather and excessive softening when mouth temperature. |
| Use | It is used as a raw material for the production of ashless detergent dispersant, adhesive, insulating glue and other products, and is also a lubricating oil additive. |
poly(isobutylene) standard 856000 - Risk and Safety
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | UD1010000 |
| HS Code | 39022000 |
poly(isobutylene) standard 856000 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | polyisobutylene (PIB) is a colorless, tasteless, non-toxic, thick or semi-solid material, heat-resistant, oxygen-resistant, ozone-resistant, weather-resistant, UV-resistant, acid and alkali-resistant and other chemicals with good performance. Polyisobutylene is a colorless, odorless, non-toxic isobutylene homopolymer. The molecular weight of the polyisobutene varies over a wide range due to differences in the preparation methods and process conditions. Most of the molecular weight of the product in the 10 000~200 000 will be by the carrier of the thick liquid into the semi solid, and then the transition to the rubber like elastomer. Polyisobutylene is acid-resistant, alkali-resistant, salt-tolerant, water-resistant, ozone-resistant and aging-resistant, and has excellent air-tightness and electrical insulation. |
| Use | polyisobutylene (PIB) is a colorless, tasteless, non-toxic viscous or semi-solid substance, heat-resistant, oxygen-resistant, ozone-resistant, weather-resistant, ultraviolet-resistant, acid-resistant, alkali-resistant and other chemicals, it has very important applications in the fields of lubricating oil additives, polymer material post-processing, medicine and cosmetics, food additives and the like. Among them, low relative molecular mass PIB can be used to produce ashless dispersant, adhesive ､ sealant, pharmaceutical and cosmetic moisturizers, etc; PIB with medium relative molecular mass is mainly used as chewing gum base, hollow glass sealing material and pesticide for agriculture, etc. Gum Gum base chew. It is used as a raw material for the production of ashless detergent dispersant, adhesive, insulating adhesive and other products, and is also a lubricating oil additive |
| classification | Polyisobutylene (Polyisobutylene PIB) is a homopolymer of isobutylene, due to the different preparation methods and process conditions, the molecular weight of the polyisobutene may vary within a certain range: 1. Different molecular weight-low molecular weight, medium molecular weight and high molecular weight polyisobutylene; 2. Different molar fractions of terminal vinyl-high activity polyisobutylene and low activity polyisobutylene; 3. Different degrees of hygiene-food grade polyisobutylene and industrial grade polyisobutylene; 4. Different polymerization processes-bulk polyisobutylene and solvent polyisobutylene; 5. Different sources of raw materials-pure isobutylene polyisobutylene and mixed carbon four polyisobutylene catalyst different aluminum-based polyisobutylene and boron-based polyisobutylene; Generally speaking, the molecular weight between 350 and 3500 of the material called low molecular weight polyisobutylene, A medium molecular weight product having a molecular weight between ten thousand and one hundred thousand, and a high molecular weight product having a molecular weight between one hundred thousand and ten million. Products with molecular weights below thirty thousand are usually liquid, while materials with higher molecular weights are solid. |
| Performance | high molecular weight polyisobutylene is a typical saturated linear polymer whose head Group is a CH3, the tail group is a CH2 -C a CH2 or-CH a C- CH3. Its heat-resistant, light-resistant, ozone-resistant aging is good, with ideal chemical stability. At room temperature, the role of dilute alkali and concentrated acid, alkali, salt stability. At higher temperatures, the polymer polyisobutylene still has excellent water resistance and air tightness, and the dielectric properties are quite excellent. High molecular weight polyisobutylene is generally in the solid state. Low molecular weight polyisobutylene (referred to as oligomeric isobutylene) is a colorless, tasteless, non-toxic thick carrier object, which is used in the fields of petroleum additives, carrier agents, chewing gum additives and blending with other polymers. Oligomeric isobutylene in many fields of application mainly depends on its loading behavior, thermal stability and electrical insulation, etc., oligomeric isobutylene has good heat resistance, oxygen resistance, ozone resistance, UV resistance, acid resistance, alkali resistance and other properties, the expansion coefficient is small, does not contain dielectric harmful substances, excellent electrical insulation. |
| application field | polyisobutylene (PIB) it has very important applications in the fields of lubricating oil additives, polymer material post-processing, pharmaceuticals, cosmetics, food additives and the like. |
| preparation | the in situ quenching method is quasi-active Polyisobutylene a method for the reaction with a quenching agent under the action of lewis acid to generate a high content of chain end a double bond polyisobutylene. Quasi-active polyisobutylene refers to a polyisobutylene containing a tertiary-monochloride functional group at the chain end. In situ quenching method 1PW1, acid is t1c14. When using BF3 as the main catalyst, polyisobutylene chain end a olefin mole fraction of 70% a 90%, using this catalytic system to generate polyisobutylene derivatives only 1 active end, bifunctional (Telechelic) chain Terminal a-double bond polyisobutene cannot be produced by industrial methods. In the use of TiCI, as the main catalyst, the chain end to maintain the ground state and the excited state in the case of continuous growth, under such conditions, the chain end will produce tertiary monochloride functional groups, under certain conditions, bifunctional and multifunctional polyisobutylene derivatives can be produced. Therefore, in the case of in situ quenching, TiCI, a catalytic system is generally used. |
| toxicity | LD50 (mouse, oral) 29g/kg. The rats were fed orally with 0.2~2.0g/kg, and there was no abnormality after 6 months. This product 5G chewing 15min, not into the saliva. Safe for use in food (FDA,§ 172.615,2000). |
| usage limit | GB 2760-1996:GMP is limited. Less than 5% of the amount of polyvinyl acetate. |
| production method | The Liquid ethylene, methyl chloride or hexane is polymerized at low temperature with aluminum chloride as catalyst. After completion of the polymerization, the temperature of the reaction mixture was increased to remove volatile components. By naphtha cracking and isobutene, and then by catalytic polymerization. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:21:28
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