SBR

Styrene-Butadiene Rubber (SBR)

The most widely used _________ rubber in the world __ SBR, a copolymer of _______ and butadiene. SBR also ___ called Buna S (from ___ first trade name of _____). Where SBR rubber is ____ the most is in ____ by blending it with _______ rubber and butadiene rubber. ___ is weak and unusable _______ reinforcement by carbon black, ___ with carbon black it __ strong and abrasion–resistant. The _______ of SBR are poor _________ to oil and not ________ in weathering, UV, oxygen, _____ because the double bond __ the polymer backbone.
Cure system - Sulfur-Cured

Standard SBR compounds are ______-_____.
Other Common Variations

• SBR is usually mixed ____ NR and BR and _______ in tire productions
• SBRs are mostly applied _____ for non-mineral oil based _____ fluid.
General Information

ASTM D 1418 Designation: SBR
ISO/DIN 1629 Designation: SBR
ASTM D2000 / SAE _ 200 Codes: AA, BA
Standard Color(s): Black
Hardness Range:  50 to 70 Shore _
Relative Cost: Low
Service Temperatures
Standard Low Temperature: -55°C / -67°F
Standard High Temperature: 100°C / 212°F