Butyl Rubber (IIR) Supplier in Malaysia
- Also known as
- IIR
- Isobutylene Isoprene Rubber
Butyl rubber supplier for tyre, pharmaceutical-closure, lining and general rubber compounders in Malaysia. Butyl rubber is the isobutylene-isoprene copolymer, designated IIR, and it is traded as the raw polymer in compressed bales rather than as a finished tape or repair product. Its defining property is very low gas and moisture permeability.
The market splits into regular butyl grades, differentiated by Mooney viscosity and isoprene level, and the halobutyl types chlorobutyl (CIIR) and bromobutyl (BIIR). Halobutyl grades cure faster and co-vulcanise more readily with natural rubber and SBR, which is why innerliner and closure compounds usually specify them.
Typical end uses include tyre innerliners and inner tubes, curing bladders, pharmaceutical vial stoppers, tank and roof linings, hoses and diaphragms, damping mounts, adhesives and sealants, and gum base for food-contact grades. Bales are normally wrapped in polyethylene film in the 25 to 35 kg range.
Send the required type, target Mooney and specification, bale quantity and delivery location with your enquiry. Availability, bale weight, documentation and delivery timing are confirmed with the quotation. Supply is subject to applicable requirements.
- CAS number
- 9010-85-9
- Grade
- industrial
- Appearance
- translucent to pale, tacky solid elastomer supplied in compressed bales
Butyl Rubber grades and forms
We supply several forms to suit different formulating and dosing setups. If you need a size that is not listed, ask us.
| Grade | Form | Assay | Typical use | Packing |
|---|---|---|---|---|
| Regular butyl rubber (IIR) | compressed solid bale | — | Inner tubes, curing bladders, tank linings, vibration damping and general air-retention compounds. Grades differ by Mooney viscosity and isoprene level. | Compressed bale wrapped in polyethylene film. |
| Chlorobutyl rubber (CIIR) | compressed solid bale | — | Tyre innerliners and compounds that need faster cure and better co-vulcanisation with natural rubber or SBR than regular butyl allows. | Compressed bale wrapped in polyethylene film. |
| Bromobutyl rubber (BIIR) | compressed solid bale | — | Innerliner and pharmaceutical-closure compounds where higher cure reactivity and strong adhesion to adjacent rubber layers are specified. | Compressed bale wrapped in polyethylene film. |
| Pharmaceutical and food-contact butyl grades | compressed solid bale | — | Vial stoppers, closures and gum base, where the compound must meet a stated pharmacopoeial or food-contact requirement. State the requirement when enquiring. | — |
How to buy butyl rubber from ChemTrade
Request a quote for butyl rubber
Use the form below to request a quotation. You can also email sales@chemtrademalaysia.com or send us a message on WhatsApp.
Specifications
| Parameter | Value | Method |
|---|---|---|
| Polymer type | copolymer of isobutylene with a small proportion of isoprene | — |
| Appearance | translucent to pale, tacky solid elastomer | — |
| Supplied form | compressed bale wrapped in polyethylene film | — |
| Defining property | very low gas and moisture permeability compared with general-purpose rubbers | — |
| Grade parameters | Mooney viscosity ML 1+8 at 125 C, isoprene (unsaturation) level and, for the halobutyl types, halogen content, confirmed against the supplied specification | — |
Butyl Rubber applications
Safety and handling
Store bales in a cool, dry, shaded place away from heat, ignition sources and direct sunlight, and keep the film wrapping intact until use. Follow the safety information supplied with the quoted grade.
Common questions about butyl rubber
What does IIR mean on a butyl rubber specification?
IIR is the standard designation for isobutylene isoprene rubber, the copolymer that butyl rubber is made of. Compounders use it to separate the polymer from butyl sealant tapes and other finished butyl products.
How is butyl rubber supplied and in what bale size?
It is supplied as compressed bales wrapped in polyethylene film, commonly in the 25 to 35 kg range depending on the grade. Confirm the exact bale weight and the pallet configuration with the quotation.
What is the difference between butyl, chlorobutyl and bromobutyl rubber?
Regular butyl is the plain isobutylene-isoprene copolymer. Chlorobutyl (CIIR) and bromobutyl (BIIR) are halogenated versions of the same polymer, which cure faster and bond better to natural rubber and SBR in a co-vulcanised construction such as a tyre innerliner.
Which butyl rubber grade should I request?
Grade selection turns on Mooney viscosity, isoprene level and, for halobutyl, halogen content. State the grade you currently run or the compound property you need, along with the application, so a matching grade can be considered.
Why is butyl rubber used for tyre innerliners and vial stoppers?
Its defining property is very low gas and moisture permeability, which holds inflation pressure in a tyre and protects an injectable product behind a closure. That property, plus good ageing resistance, is why it is chosen over general-purpose rubbers.
Is butyl rubber the same as polyisobutylene?
No, they are different products. Butyl rubber is the isobutylene-isoprene copolymer, which contains enough unsaturation to be vulcanised, while polyisobutylene is the saturated homopolymer used as a tackifier and viscosity modifier. Enquire for each under its own name.
How is butyl rubber priced for Malaysian buyers?
Price depends on the polymer type, Mooney grade, quantity, packing and any documentation required. Send those details with the delivery location for a current quotation with a stated validity period.