Model: 国标
Coal tar pitch
Coal tar pitch (high ,medium temperature)
related properties of Medium temperature coal tar pitch
parameters Units First class Second class
Softening point (ring-ball) ℃ 80~90 75~95
TI( toluene insolubles) % 15~25 ≤25
QI( quinoline insolubles) % 6~10 6~15
B- resin % no less than - -
Coking value % no less than - -
dust % no more than 0.3 0.3
moisture % no more than 5 5
Related properties of Modified coaltar pitch
Parameters units Fiest class Second class
Softening point(ring-ball) ℃ 100~115 100~120
TI( toluene insolubles) % 28~34 >26
QI( quinoline insolubles) % 8~14 6~15
B- resin % no less than 18 16
Coking value % no less than 54 50
Dust % no more than 0.3 0.3
moisture % no more than 5 5