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BIIR

BIIR is a special synthetic rubber with good air tightness and excellent chemical stability. It is mainly used in air tightness of tires to increase the life cycle of radial tires and help the development of eco-friendly tires. At the same time, (halogenated) butyl rubber is an irreplaceable raw material for pharmaceutical stoppers under the category of antibiotics, which safeguards people’s health.
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  • Break down the monopoly on foreign markets.
  • With excellent airtightness, it is used in tire inner liners and can greatly improve the maintenance rate of tire inflation pressure.
  • Its air permeability is 1/7 of natural rubber, and 1/5 of styrene butadiene rubber. The redundant and stable air pressure of the tires ensures long-term driving.

 

Application

◎ It is mainly used in air tightness of tires to increase the life cycle of radial tires and help the development of eco-friendly tires.
◎ At the same time, (halogenated) butyl rubber is an irreplaceable raw material for pharmaceutical stoppers under the category of antibiotics, which safeguards people’s health.
 
Name Item Unit Index Frequency Method
BIIR2828 BIIR2430 BIIR2841 BIIR2249
BIIR Appearance / White to beige bulk solids Times/2h Visual inspection under natural light
Mooney Viscosity ML (1+8) 125 32.0±4.0 32.0±4.0 41.0±3.0 46.0±4.0 Times/4h GB/T1232.1
Bromine Content  (Mass Fraction) % 2.00±0.20 2.30±0.15 2.00±0.20 2.00±0.20 Times/8h GB/T9872
Volatile Compounds  (Mass Fraction) % 0.50 0.50 0.50 0.50 Times/2h GB/T24131.2-2017
Ash Content  (Mass Fraction) % 0.7 0.7 0.7 0.7 Times/8h GB/T4498.1-2013
FH dN·m 6.9±2.0 7.4±2.0 7.8±1.4 8.2±2.0 Times/8h Mix according to ASTM3958, adopt the condition 6.2 in SH/T1717-2008, and measure according to GB/T16584
FL dN·m 2.1±1.0 2.1±1.0 2.6±0.9 2.7±1.0
Ts1 Min 2.9±1.2 2.7±1.2 3.1±1.0 3.1±1.2
T50 Min 5.3±1.5 4.8±1.5 5.3±1.0 5.3±1.5
T90 Min 8.4±2.0 5.9-7.4 8.6±1.0 8.4±2.0
Elongation At Break  (Internal control)  % 430 / 430 400 Times/24h GB/T528-2009
300% Tensile Stress  (Internal control)  MPa 7.0-8.0 / / /
Tensile Strength 
(Internal control) 
MPa 12.9 / 13.4 13.4
Stabilizer  (Mass Fraction) % 1.2-1.6 1.0-1.6 1.2-1.6 1.2-1.6 Times/8h Enterprise Standard
Antioxidant (Mass Fraction) % 0.03 0.03 0.03 0.03 Times/8h Enterprise Standard
Calcium stearate (Mass Fraction) % 2.00-2.65 Times/8h Enterprise Standard
Molecular weight, nuclear magnetism, air tightness / / Three days before transfer, times/24h Enterprise Standard
Rubber block weight Kg/piece 34±0.102 / Enterprise Standard
Packing weight of finished rubber 1,224Kg/box  (34kg/piece×36 pieces)  or other packaging unit / Enterprise Standard
  Total salt (Mass Fraction) % 4.5 Times / Batch HJ/T51
Bromide ion concentration (Mass Fraction) % 3.0-16.0 Times / Batch Enterprise Standard
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