国家/地区 印度（2）
IPC部 B（3）
IPC大类 B65（3） C08（2）
IPC小类 B65D（3）
IPC
发明人
公开年 2021（3）
申请年 2019（3）
专利权人

Preparing 3-substituted 4-hydroxycoumarin compound, involves mixing 4-hydroxycoumarin derivatives with unsaturated alfa-beta-ketone, adding water, amino functional solid catalyst, heating, crystallizing viscous mass using organic solvent.

HAIDER M A, ALAM M I, AKHTAR M W, SHAHADAT M, AHMAD S Z

Improved water soluble film used to make packaging film, comprises water soluble films batch i.e. prepared by mixing e.g. water soluble resins, plasticizers and fillers and mixing water soluble film batch with graphene nanoparticles.

PATEL S P

Gas and moisture permeable film used in vegetable and fruit fresh-keeping package, comprises support layer and functional layer, where functional layer exists on one side of support layer or on both sides of support layer.

ZHANG Y, YIN J, ZHENG C, SONG J, TANG Y, YAO X, PAN G, LIU Y