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SBR

Detailed introduction
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Now our company developed a dedicated to self-adhesive modified bitumen waterproofing membrane -white ultra-fine powder styrene butadiene rubber (SBR). We select high performance SBR rubber as raw material. Good compatibility with asphalt, in the 160-170 ℃ conditions, it can quickly dissolve in the bitumen, low energy consumption. The ultra-fine powder styrene-butadiene rubber can change bitumen's rheological properties in low temperature, it makes the modified bitumen waterproofing membrane has good flexibility in low temperature, high elongation, high tensile strength, high tear resistance, adaptability to the easy deformation base, corrosion resistance, puncture resistance, UV resistance and long life.
Compared with SBS, SBR is not only low price, cost savings, while low temperature performance is more excellent, it can replace part of the SBS,  to improve waterproof membrane with low temperature flexibility and better elongation.
 

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  Particle size: 10-80 mesh
  Molecular weight: 200-300 thousand
  Combinated styrene content: 21-35%
  Raw rubber Mooney viscosity: 48-66

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As requirement, take 5 to 15% SBR powder, sprinkling into 130 -140 ° bitumen slowly; stirring for 20 to 60 minutes to sufficiently swell the SBR powder. Then increase temperature to 160 ~ 175 ℃ for high-speed shear, or grinding with colloid grinder for 10 to 40 minutes.



SBR DATA.pdf