Shanghai Jiao Tong University

East China University of Science and Technology

Kunshan Tianyang Hot Melt Adhesive Co., Ltd

Shanghai Tianyang Hot Melt Adhesive Co., Ltd

Yongjian Zhang

Wanbin Zhang

Feijun Wang

Zhelong Li

Zuoxiang Zeng

Wanyu Zhu

Heji Lei

Xingquan Ma

A composite hot-melt adhesive mesh film and preparation process thereof, in particular, a composite hot-melt adhesive mesh film and preparation process thereof for bonding metal and non-polar material are disclosed. The mesh film is compounded of a polar polyamide hot-melt adhesive and a non-polar polyolefin hot-melt adhesive mesh film containing a compatibilizer. The mesh film has a high adhesive strength and a durable and stable adhesion, and is especially suitable for bonding stainless steel, aluminum, copper or other metal materials and polyethylene, polypropylene or other non-polar polymers. Additionally, the preparation process is completed in one set of production process from raw material pretreatment to the final preparation of the hot melt adhesive mesh film product, thereby greatly reducing production failures, and providing high production efficiency and low costs.

Composite hot-melt adhesive net film and manufacturing process thereof

The present invention relates to a method for preparing 2,2',6,6&#x2032;-tetraoxazolinyl biphenyl ligand in chemical industry field. In the present invention, compound (III) is reacted with an activator that can activate the hydroxyl group selected from the group consisting of alkyl halosulfonium compound, aryl halosulfonium compound, phosphoryl chloride, phosphorus pentachloride, thionyl chloride and triphenyl phosphine, in the presence of alkali(s), to give the target product (IV), 2,2&#x2032;,6,6&#x2032;-tetraoxazolinyl biphenyl ligand. The ligand of the present invention can be used in various asymmetric reactions catalyzed by metals, with high reactivity and stereoselectivity, and thus represents a good application outlook. The 2,2&#x2032;,6,6&#x2032;-tetraoxazolinyl biphenyl ligand has the formula of: 

2,2',6,6&#x2032;-tetraoxazolinyl biphenyl ligand and method for preparing the same

The present invention relates to a 5,5'-position linked 1,1&#x2032;-biphenyl axis chiral ligand in chemical industry field. The present invention incorporates both the central chirality of oxazoline and the axial chirality of diphenyls. Such ligand can be used in various asymmetric reactions catalyzed by metal with high reactivity and stereoselectivity, and thus represents a good application outlook. The ligand of the present invention has the formula of: wherein: n=5, 6, 7, 8, 9, 10, 11 or 12; R=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl.

5,5'-Position linked 1,1&#x2032;-biphenyl axial chiral ligand and method for preparing the same

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Shanghai, China

Yongjian Zhang