Styrene - Butadiene Rubber ( SBR ) - شرکت سیل گستر سالاران

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14 Nov 2022

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Styrene – Butadiene Rubber ( SBR )

SBR

Styrene – Butadiene Rubber ( SBR )

The most widely used synthetic rubber in the world is SBR, a copolymer of styrene and butadiene. SBR was also was called Buna® S ( from the first trade name of Bayer ). Where SBR rubber is used the most is in tire by blending it with natural rubber and butadiene rubber. SBR is weak and unusable without reinforcement by carbon black, but with carbon black it is strong and abrasion resistant. The defects of SBR are poor resistant to oil and not suitable in weathering, UV, oxygen, ozone because of the double bond in the polymer backbone.

Cure system – Peroxide – Cured

Standard SBR compounds are sulfur-cured.

Other Common Variations:

►SBR is usually mixed with NR and BR and applied in tire productions.

►SBRs are mostly applied seals for non-mineral oil based brake fluid.

Performs Well In…

►Water

►Alcohol

►Silicone oil and grease

►Non-mineral oil based brake fluid

►Weak acids

Doesn’t Perform Well In…

►Petroleum oils and fuels

►Aromatic,aliphatic,or halogenated hydrocarbons

►Strong acids

►Mineral oils

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14 Nov 2022

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Carboxylated Nitrile ( XNBR )

XNBR Carboxylated Nitrile ( XNBR ) 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. Cure system - Sulfur - Cured Standard XNBR compounds are sulfur-cured Performs Well In… ►Aliphatic hydrocarbon ►Vegetable and mineral oils and greases ►Diesel ►Water Dilute acids, alkali and salt solutions Doesn't Perform Well ...

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14 Nov 2022

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Silicone Rubber ( MQ, VMQ, PVMQ )

VMQ Silicone Rubber ( MQ, VMQ, PVMQ ) Physically, silicones are based on silicon, an element derived from quartz. To create this class of synthetic elastomers, pendant organic groups such as methyl, phenyl and vinyl are attached to silicon atoms. The different addition of side chains can achieve significant variations in properties. Silicones have excellent heat, ozone and corona resistance, very well dielectric stability, and resistance to many oils, chemicals, and solvents. And for all elastomers, silicones possess the best flexible property ...