公开(公告)号：EP3957670A1

公开(公告)日：2022-02-23

申请号：EP19925423.6

申请日：2019-04-19

申请人： Wanhua Chemical Group Co., Ltd. ,  Wanhua Chemical (Ningbo) Co., Ltd.

发明人： WANG, Xiao ,  JI, Xueshun ,  LI, Weifei ,  QU, Rui ,  ZHANG, Chengbin ,  DENG, Junying ,  SUN, Jiakuan ,  ZHOU, Bin ,  WANG, Qiao ,  GONG, Ji

IPC分类号： C08G59/40

摘要： The present invention belongs to the technical field of aqueous epoxy coatings, and especially relates to an ionic aqueous epoxy curing agent, a preparation method therefor and the use thereof. The aqueous epoxy curing agent is prepared by reacting the following raw materials in parts by weight: a) 1 part of a polyepoxy compound, b) 1.3-6 parts of a multifunctional compound, c) 0.2 to 1.25 parts of a monoepoxy compound, and d) 0.01 to 0.23 parts of a sultone, wherein the multifunctional compound has four or more active hydrogens. The curing agent obtained in the present invention not only has a good hydrophilic effect and very good thinning performance, the paint film prepared by mixing same with an epoxy dispersion has the following advantages: excellent salt spray resistance and water resistance, strong adhesion, high hardness, etc.; in addition, the preparation process of the curing agent is simple, the conditions are mild, and room temperature curing is carried out.

公开(公告)号：EP4032929A1

公开(公告)日：2022-07-27

申请号：EP20894354.8

申请日：2020-07-07

申请人： Wanhua Chemical Group Co., Ltd.

发明人： ZHU, Fulin ,  LI, Jianfeng ,  WANG, Peng ,  LI, Wenbin ,  CHEN, Jie ,  WANG, Qiao ,  WU, Qian ,  CHEN, Hao ,  SHANG, Yonghua ,  LI, Yuan

IPC分类号： C08G18/75 ,  C08G18/38 ,  C07C265/14 ,  C07C263/10

摘要： Disclosed is a 1,3-bisisocyanatomethylcyclohexane composition and an optical resin prepared therefrom. The composition comprises, based on the weight of 1,3-bisisocyanatomethylcyclohexane, a) 65%-95wt% of trans-1,3-bisisocyanatomethylcyclohexane; b) greater than 0 and less than or equal to 0.5wt%, preferably 0.02-0.5wt% of 1,4-bisisocyanatomethylcyclohexane. Preferably, the 1,3-bisisocyanatomethylcyclohexane composition contains greater than 0 and less than or equal to 600 ppm of 1-isocyanatomethyl-3-methylcyclohexane, based on the weight of 1,3-bisisocyanatomethylcyclohexane. The 1,3-bisisocyanatomethylcyclohexane composition is used for preparing an optical resin, which can be applied to produce an optical lens with a better performance in preventing opacification and optical distortion.