Zhishang Chemical

Welcome to Zhishang Chemical      +86-176 5311 3209     Simon@sdzschem.com

Zhishang Chemical

Polyisobutylene CAS 9003-27-4

Molecular Formula: C4H8

Formula Weight: 56.10632

ZSpharmac: Polyisobutylene Supplement

Product Name: Polyisobutylene
CAS No: 9003-27-4  
Purity: 99%

Basic Info

Product Name:Polyisobutylene
Other Names:Polyisobutylene (1 g)
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Organic Chemical Raw Materials
Appearance:Colorless Slab/Chunk
EINECS No.:618-360-8
Provide:Polyisobutylene MSDS;
Polyisobutylene COA

What is Polyisobutylene?

Polyisobutylene (PIB) is an anemic, unsmelling, non-toxic thick or semi-solid compound with great chemical residential properties such as heat resistance, oxygen resistance, ozone resistance, weather resistance, UV resistance, acid and also alkali resistance. Polyisobutylene is an anemic, odor free, harmless homopolymer of isobutylene. As a result of various preparation approaches and also process conditions, the molecular weight of polyisobutene differs within a wide variety. Polyisobutylene is immune to acid, alkali, salt, water, ozone as well as aging, and also has excellent air tightness and electric insulation.

Polyisobutylene Properties:

Melting point 54-56 °C
Boiling point 300 °C
density 0.92 g/mL at 25 °C (lit.)
refractive index n20/D 1.51
form slab/chunk


Application of Polyisobutylene

1.1 Application of low activity and low molecular weight polyisobutylene
PIB has very broad application prospects, not only can be widely used in electrical insulation materials, lubricant additives, petroleum additives, putty adhesives and other fields; it can also be used in chewing gum additives and rubber and other polymer modification.
(1) Application in lubricating oil
There are four commonly used ashless dispersants (1) monobutylphthalimide; (2) bisbutylphthalimide; (3) polybutylenephthalimide; (4) high molecular weight dispersant. The performance of gasoline detergent with PIB as the main compounding agent exceeds the level of foreign gasoline detergent LZ8195191. In _stroke oil, PIB can not only improve the lubricating performance of the oil; it can also improve the combustion performance and exhaust blockage of the oil; after adding PIB to the oil, it can significantly improve the anti-oxidation performance and smoke exhaust performance; its thermal The decomposition performance greatly improves the combustion performance and exhaust blocking performance of the oil; after adding PIB to the oil, the oxidation performance is greatly improved, and the smoke exhaust performance is also significantly improved. PIB has excellent shear stability and can be used to configure hydraulic oil and multi-grade gear oil; but it cannot be configured with multi-grade internal combustion engine oil with lower viscosity grade and large span because of poor thickening ability and low temperature performance of PIB.
(2) Application in polymer
PIB can be divided into three types according to the size of molecular weight: (1) low molecular weight polyisobutylene; (2) medium molecular weight polyisobutylene; (3) high molecular weight polyisobutylene. At present, only the German company BASF can produce high molecular weight polyisobutene. The application of polyisobutylene in polymers is mainly used as adhesives and sealants, used in rubber processing and as insulating oil in wires and cables.
(3) Application in emulsion explosives
Emulsion explosive is a new type of water-in-oil (w/O) latex explosive. Developed in the 1970s. Because of its good explosiveness, good water resistance, and less toxic gas, it is widely recognized and praised by users. Through experiments, Ye Zhiwen et al found that the emulsion explosive prepared with polyisobutylene had good performance. Main performances: (1) The W/O emulsion particles are small and the distribution is relatively uniform; (2) The liquid film has good stability; (3) The storage stability is high; (4) The high and low temperature cycle is high, and the cycle test can reach 25 times. Cheng Jingjing et al. found through experiments that the surface tension of emulsion explosives will decrease with the increase of emulsifier content, but the decrease is not large; in the emulsification system, adding emulsifier can greatly reduce the boundary tension of the system, and the mass fraction of emulsifier is generally less than 2.5%.
(4) Application in medicine
The application of PIB in medicine mainly depends on its colorless, odorless and non-toxic properties. Up to now, it is mainly used in two ways: application in transdermal (controlled release) patches and preparation of microcapsules. The chemical properties of polyisobutylene are stable and can ensure the original properties and therapeutic effects of the drug, so it is suitable for different types of drugs.
(5) Application in cosmetics
The application of PIB in cosmetics mainly has three forms: 1) cosmetic grade polyisobutene; 2) hydrogenated polyisobutene (synthetic cartonane); 3) polyglycerol methacrylate. Cosmetic-grade polyisobutylene has good compatibility with the skin because its structure is similar to the straight-chain alkanes in sebum. It is non-toxic, odorless, high in purity, not easy to be oxidatively emulsified, can form a water-resistant film, and has strong moisturizing properties. The main application range is skin cream, lipstick, make-up. At present, the cosmetic grade polyisobutylene used in my country mainly comes from Japan and the United Kingdom.
1.2 Application of HRPIB
HRPIB has good low temperature dispersibility and high temperature detergency, it can be used as a lubricant additive for the production of oil products; it is compatible with general non-polar substances and polymer materials o HRPIB is mainly used in the production of oil products by thermal addition Ashless dispersant (ie polyisobutylene butyl-phthalimide). As long as it is the field of common PIB application, HRPIB can be used in almost all applications; such as: lubricating oil viscosity index improver, paraffin, rubber improver, electrical insulating material, gap filling and sealing material, slow release nitrogenous fertilizer, oil day fracturing fluid It is used as a drag-reducing agent, steel wire rope oil, chewing gum base, waterproof explosive, rocket propellant component, moisturizing agent for medicine and cosmetics, etc. The production of HRPIB is much higher than that of ordinary PIB. HRPIB is currently mainly used to produce some high-end products, such as: ashless dispersants namely polyisobutylene phthalimide and polyisobutylene amine.
Using polyisobutylene with a very narrow molecular weight distribution as the main raw material, polyisobutylene amine (PIBA) can be prepared through processes such as oxidation, aminolysis, and compounding. Polyisobutylene amine is the main component of the fourth-generation gasoline cleaning and dispersing agent. This type of gasoline cleaning and dispersing agent has the functions of demulsification, dispersion, cleaning, anti-oxidation and rust removal.
Lin Jianmin and others also conducted a series of experiments. A series of benzylamines were synthesized from polyisobutenylphenol, formaldehyde and polyene polyamine by alkylation of HRPIB and phenol under acid catalysis to generate polyisobutenylphenol.
2. Application of medium molecular weight polyisobutylene
The catalyst system of relative molecular mass polyisobutylene in domestic production is only aluminum trichloride catalyst system. Restricted by the catalytic system and process technology, the medium molecular weight polyisobutylene products not only have low purity, but also have a wide relative molecular weight distribution and poor appearance.
In agriculture, the pesticides made of polyisobutylene (My=10000) have good insecticidal effects.

Preparation of Polyisobutylene

Kenne-dy et al. synthesized HRPIB by in situ quenching method for the first time.At present, HRPI with a molar fraction of a-double bond at the end of the chain can be synthesized by in situ quenching method up to 100%.
The in-situ quenching method is a method in which quasi-living polyisobutylene (Quasiliving Polyisobutylene) reacts with a quencher under the action of Lewis acid to generate a high-content chain terminal a-double bond polyisobutylene. Quasi-living polyisobutylene refers to polyisobutylene containing tertiary monochloride functional groups at the chain ends. The 1PW1 and acid in the in-situ quenching method are T1C14. When BF3 is used as the main catalyst, the molar fraction of a-olefin at the end of the polyisobutene chain is 70% to 90%, and the polyisobutene derivative generated by this catalytic system has only one active end, which cannot be industrially produced. Claw) chain end a-double bond polyisobutylene. When TiCI is used as the main catalyst, the chain end keeps growing while maintaining the balance between the ground state and the excited state. Under such conditions, a tertiary monochloride functional group will be generated at the end of the chain. Under certain conditions, bifunctional and Multifunctional polyisobutylene derivatives. Therefore, in the in-situ quenching, TiCI and catalytic systems are generally used.

Classification of Polyisobutylene

Polyisobutylene (PIB) is a homopolymer of isobutylene. Because of different preparation techniques and also procedure conditions, the molecular weight of polyisobutylene can vary within a specific variety:
1. Various molecular weights – low molecular weight, tool molecular weight and also high molecular weight polyisobutylene;
2. Various molar fractions of terminal plastic groups – high task polyisobutylene as well as reduced task polyisobutylene;
3. Different levels of hygiene – food grade polyisobutylene as well as industrial grade polyisobutylene;
4. Different polymerization processes – bulk method polyisobutylene and solvent method polyisobutylene;
5. The source of raw materials is different – pure isobutylene polyisobutylene and mixed carbon tetramer isobutylene catalysts are different from aluminum polyisobutylene and boron polyisobutylene; Between 10,000 and 100,000 are medium molecular weight products, and those with a molecular weight between 100,000 and 10 million are high molecular weight products. Products with molecular weights below 30,000 are usually liquid, while materials with higher molecular weights are solid.

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

Get Polyisobutylene Quotation