In accordance with the domestic production and application cases for pitch as impregnatingagent, Suggestions for speeding up the commercial production of pitch as impregnatingagent are given.
根据国内浸渍剂沥青的生产和使用情况，提出了加快浸渍剂沥青工业化生产的建议。
2
Solvent impregnating resins (SIR) have been prepared by impregnating macroporous styrene-divinylbenzene copolymer adsorption resins (SDAR) in the solution of extracting agent N235.