-------------------------------------------------------------------------------- Modified Coal Tar Pitch GB8730-88 Grade 1 Grade 2 Softening point(Ball and ring method)℃ 100～115 100~120 T.I. Content(Extraction method)，% 28~34 ＞26 Q.I. Content，% 8~14 6~15 β-resin content，% No less than 18 16 Agglomerating value，% No less than 54 50 Ash，% No more than 0.3 0.3 Water，% No more than 5