Butyl Rubber Material Properties

In addition to tremendous shock absorption butyl features exceptionally low gas and moisture permeability and outstanding resistance to heat aging.

Butyl rubber material properties. It offers excellent resistance to alkalis and acids and this material is good for electrical insulation automotive parts and construction. Butyl is an extremely popular gasket material as the compound is much less porous than other rubber compounds. Denver rubber company butyl rubber is. For example if you need to find rubber compression properties rubber weather resistance or even rubber ozone resistance for your o rings you can find the best combination of elastomer properties by using this o ring material guide for your application.

19 this resin shows high reactivity towards e beam or uv free radical or cationic 53 the bromo butyl intermediate has also been used to attach acrylate or photoinitiator groups to the butyl. Or better yet use the rubber chart to find which material will best suit your environment. Butyl rubber is produced by polymerization of about 98 of. Valued for its chemical inertness impermeability to gases and weatherability butyl rubber is employed in the inner linings of automobile tires and in other specialty applications.

Butyl rubber is impermeable to air with outstanding resistance to gases vapors heat aging oxygen ozone sunlight abrasion and tearing. Rubber compounding is a very broad and technical field since basic rubbers or elastomers are mixed with various chemicals and ingredients and even with each other to obtain desired physical properties. The material features a wide operating range and is able to maintain its flexibility even in sub zero temperatures. The chart below is intended to help in the material selection stage of designing rubber parts products.

A material made for shock absorption butyl rubber offers some special capabilities to make it a potential option for applications that need quality sealing lining mounting or more. Butyl rubber also known as isobutylene isoprene iir is a synthetic elastomer produced by low temperature cationic copolymerization of 1 1 dimethylethylene isobutylene with about 0 5 to 2 percent 1 methyl 1 butenylene isoprene using lewis catalysts in chlorocarbon solvents. Rubber material selection guide iir or butyl isobutylene isoprene rubber abbreviation iir astm d 2000 classification aa ba ca chemical definition isobutylene isoprene rrp compound number category 50000 series physical mechanical properties durometer or hardness range 40 90 shore a tensile strength range 500 3 000 psi. Butyl gaskets also provide good tear resistance and shock absorption properties.

Butyl rubber sometimes just called butyl is a synthetic rubber a copolymer of isobutylene with isoprene the abbreviation iir stands for isobutylene isoprene rubber. Butyl rubber isobutylene with about 2 iso prene has been functionalized through the residual double bonds via the bro mobutyl intermediate to produce a material with 2 conjugated diene see fig.