国家/地区 中国（3）
IPC部 C（3）
IPC大类 C08（3） C09（3）
IPC小类 C08F（3）
IPC C08F220/06（3）
发明人
公开年 2023（3）
申请年 2022（2） 
专利权人

Preparing negatively charged graphene oxide-based drilling fluid loss reducer, comprises dispersing graphene oxide in solvent, adding organic amine, negatively charged monomer, 4,4'-azobis(4-cyanovaleric acid) as initiator and amide condensing agent and carrying out polymerization reaction.

LI H, YI S, DONG H

Specific fluorescent indicator sheet useful in detection of harmful substances in agricultural product, preferably pesticide, melamine, clenbuterol, and pyrrolidine, prepared by e.g. scraping indicator sheet preparation solution on support layer, and preparing surface functional layer.

SUN B, MA A, WANG J, WANG S, LIU Y, ZHU Y, HE Y

Thick oil viscosity reducer composition useful for viscosity reduction of heavy oil transported by pipelines, and viscosity reduction of heavy oil in cold recovery comprises low molecular weight amphiphilic polymers and nano-hydrophobic modified materials.

MA C