国家/地区 中国（2）
IPC部 C（2）
IPC大类 C04（2）
IPC小类 C04B（2）
IPC C04B024/32（2）
发明人
公开年
申请年 2021（2）
专利权人

Preparing polycarboxylate aqueous reducing agent using vinyl polyoxyethylene ether comprises adding large monomer, ammonium persulfate and de-ionized water into reactor kettle with stirrer, thermometer and dropping device, stirring, dropping liquids, dropping performance modifier and polymerizing.

SUN W

Cement-based grouting material for semi-flexible mixture, comprises sulphoaluminate cement, slag powder, fly ash, chemical additive, modified graphenThe cloth full cutting device according to wherein the cutting device between the engaginge fiber and rest is water.

WEI Y, LIU Y, QI S, LIU J, HUANG W