Polyurethane elastomers based on glycols ( PEA, PPG PTMG ) , diisocyanate ( TDI ) and chain extender ( E - 300 ) were prepared.以多元醇 ( PEA, PPG,PTMG ),PDI, E300為原料,制備了 PU 彈性體.Polyether - type isocyanate prepolymers are pr...
Hexamethylene diisocyanate ( HMDI ) may be used in prepolymer, in place of TDI.六亞甲基二異氰酸酯 ( HMDI ) 可用在預聚物中代替甲苯二異氰酸酯〔TDI〕.Polyurethane elastomers based on glycols ( PEA, PPG PTMG ) , diisocyanate ( TDI ) and chain extender...
The road was reduced to 18ft in width by adding parking bays.這條路增加了停車區后寬度縮減到了18英尺。Allow for some shrinkage in both length and width.長、寬上都預留出一定的縮水量。Measure the full width of the window.測量一下窗戶的全寬。...
The ammonium chloride is neutralized by vaporizing and thickening from mother liquors.而吸附鉬后剩下的母液蒸發、濃縮、結晶出氯化銨,可用作農用化肥.With a vaporizing gas drive , miscibility is achieved at some distance from the injection well.在蒸汽驅中, 混...