Butyl rubber is composed by copolymerizing isobutylene, which with small amounts of isoprene. It is like EPDM possessing excellent resistant to chemical and polar fluid, outstanding electrical insulation and good ozone resistance. The special properties of butyl rubber are low gas and moisture permeability and high shock absorption. These properties have made butyl rubber the polymer choice in a variety of applications.
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Natural rubber is produced from the latex of the Hevea brasiliensis, the chemical name of polymer is polyisoprene. Polyisoprene also can be synthesized by polymerization from its monomer isoprene. Natural rubber possesses many excellent physical properties including high resilience and strength, good abrasion resistance. The defects are like SBR, having poor resistant to hydrocarbon oil and not suitable in UV, oxygen, ozone because the double bond in the polymer backbone. But its poor weathering resistance can be modified by special additive. |
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Natural rubber is produced from the latex of the Hevea brasiliensis, the chemical name of polymer is polyisoprene. Polyisoprene also can be synthesized by polymerization from its monomer isoprene. Natural rubber possesses many excellent physical properties including high resilience and strength, good abrasion resistance. The defects are like SBR, having poor resistant to hydrocarbon oil and not suitable in UV, oxygen, ozone because the double bond in the polymer backbone. But its poor weathering resistance can be modified by special additive. |
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Cabboxylated Nitrile is similar to Nitrile rubber, but the polymer backbone has been chemically modified with Carboxylic Acid containing group. This result is XNBR with more excellent abrasion and tear resistance than traditional NBR. For this reason, XNBR based parts are usually applied in dynamic assembly such as seals and rod wipers. |
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The millable Polyurethane rubbers are distinguished two types; one is polyester urethane (AU), the other is polyether urethane (EU). AU type urethanes have outstanding oil, fuel and solvent resistance but can be attacked by hydrolysis, EU type urethanes are not attacked by hydrolysis and still offer a fuel and oil resistance comparable to low ACN ( 18~22% ACN) nitriles or HNBRs. Any types polyurethane all have excellent wear resistance, high tensile strength and high elasticity in comparison with any other elastomers. |
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Hydrin® is the trade name of epichlorohydrin elastomers made by Zeon Chemicals. epichlorohydrin elastomers are available as a homopolymer(CO), copolymer(ECO,GCO), And terpolmer(GECO). All epichlorohydrin rubbers offer low temperature flexible; resistance to oils, fuel and common solvents; good waetherability and good dynamic properties. |
