国家/地区 中国（2）
IPC部 B（2）
IPC大类 B05（2） C09（2）
IPC小类 B05C（2）
IPC B05D007/24（2）
发明人
公开年 2023（2）
申请年 2022（2） 
专利权人

Preparing poly-o-aminophenol modified graphene/aqueous polyurethane composite coating of multi-layer assembly comprises chemically self-polymerizing o-aminophenol on high-temperature heat-reduced graphene oxide, cross-linking to react on polyurethane, dipping and pulling.

ZHANG J, ZHENG Y

Preparing internal spiral polyvinyl chloride drainage pipe, comprises e.g. bending and spiraling steel wire, extruding, injecting into brushing mechanism, carrying out spiral groove processing, forming inner spiral groove, spraying, extruding, painting and performing preliminary drying.

LIU Z