Polyisobutylenes Manufacturer

Conventional (PIB) & High Reactive (HR-PIB) Supplier 

As a polyisobutylene manufacturer, RB Products proudly manufactures and supplies both conventional polyisobutylenes (PIB) and high reactive polyisobutylenes (HR-PIB) for clients in a wide range of industries.  It is also commonly known as, isobutene polymer, isobutylene polymer, and PIB.

Conventional Polyisobutylene Distributor (PIB) 

Conventional polyisobutylenes are colorless, odorless, viscous chemically inert liquids. They are non-drying and highly resistant to oxidation and photodegradation. Polyisobutylenes are non-toxic and will not leave residue when volatilized or thermally decomposed.

High Reactive Polyisobutylene Distributor  (HR-PIB) 

High reactive polyisobutylenes are bright, clear, viscous specialty chemicals. The term “ high reactive” is in reference to the materials increased terminally positioned doubled bonds also known as the molecules “vinylidene” content. HR-PIB can be used in place of conventional polyisobutylene but its primary application is as a reactionary intermediate. HR-PIB also has an increased polydispersity index when compared to conventional PIB. 

PIB & HR-PIB Applications and Industries

Polyisobutylene is one of the more versatile polymers used in industrial formulations, with applications spanning numerous end markets. Whether your requirement calls for conventional PIB or high reactive polyisobutylene (HR-PIB), the right molecular weight grade determines performance in the finished product.

  • Lubricants and Engine Oils: PIB is a well-established component in lubricant formulations, functioning as a viscosity modifier and carrier fluid for additive packages. 

  • Fuel Additives: HR-PIB is the preferred building block for polyisobutylene amine (PIBA) and polyisobutylene succinimide (PIBSI) detergent additives used in gasoline and diesel fuels. 

  • Adhesives, Sealants, and Caulks: Mid- to high-molecular-weight PIB is used as a tackifier and sealant base in pressure-sensitive adhesives, hot-melt compounds, and construction sealants, so it's ideal for roofing membranes, insulating glass sealants, and automotive seam sealers.

  • Personal Care and Cosmetics: Low-molecular-weight PIB grades function as skin-conditioning agents and emollients in cosmetic formulations for leave-on products such as lip care, sunscreen, and skin protectants.

  • Industrial and Specialty Applications: PIB's electrical insulating properties and resistance to moisture make it useful in cable filling compounds and electrical insulation. In the food and agricultural markets, low-molecular-weight grades are approved for use in food contact applications and as inert ingredients in certain pesticide formulations. PIB also appears in chewing gum bases, conveyor belt lubricants, and paper and packaging coatings, where its stability and nonreactive character are advantages.

Specifications

RB Products supplies polyisobutylene and high reactive polyisobutylene across numerous molecular weights to meet the performance requirements of different applications. Each grade is characterized by its number-average molecular weight (Mn), viscosity, and vinylidene content, which determine its suitability for a given end use.

Conventional PIB grades are available from low molecular weight (approximately 300–500 Mn) through mid-range (1,000–2,300 Mn) and up to high molecular weight grades above 85,000 Mn. 

HR-PIB grades are defined by a vinylidene content typically exceeding 70–80%, which is the reactive terminal double bond required for efficient downstream chemistry.

  • Chemical Formula: (C4H8)n
  • Molecular Weight: Varies based on its application
  • CAS Number: 9003-27-4
  • EINEC Number: 618-360-8

RB Products is a Leading Polyisobutylene Manufacturer

RB Products Inc. is proud to supply both conventional and high reactive polyisobutylene for domestic and international customers. Our top priority is to provide you with the most efficient products with unmatched customer service. Contact us today! 

FAQs

How is polyisobutylene different from polybutene?

The two terms are sometimes used interchangeably in the market, but they refer to distinct products. Polyisobutylene is produced exclusively from isobutylene monomer, resulting in a highly regular structure with low unsaturation. Polybutene is produced from a mixed C4 stream and contains a mixture of isobutylene and n-butene units, resulting in a different structure and reactivity profile. For applications requiring controlled vinylidene content, such as fuel additive synthesis, PIB or HR-PIB is the specified material, not polybutene.

Does polyisobutylene require any special handling or storage conditions?

PIB is chemically stable under normal storage conditions, but viscous grades may require heated storage or transfer equipment to maintain pumpability. It should be kept away from strong oxidizing agents and stored in a cool, dry area away from direct heat sources. Containers should remain sealed when not in use to prevent moisture ingress and contamination.

Can polyisobutylene be blended with other base oils or polymers?

PIB is generally compatible with mineral oils, Group I through Group III base stocks, and many synthetic base fluids. It is commonly blended into lubricant formulations or used in combination with other polymers in adhesive and sealant systems. Compatibility with specific base oils or co-polymers should be confirmed through bench testing, as molecular weight and concentration affect the final blend properties. Our team can assist with grade selection and application testing support

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