Process for preparing TDI isocyanurate

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United States of America Patent

PATENT NO 9593089
APP PUB NO 20160016917A1
SERIAL NO

14652242

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Abstract

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The present invention relates to a method for preparing TDI (toluene diisocyanate) isocyanurate by using TDI, monohydric alcohol, solvent, antioxidant, catalyst and termination agent as the raw materials. The properties of the isocyanurate are improved by the process comprising the modification by monohydric alcohol and addition of the catalyst and solvent in several stages at an appropriate temperature. By adding the catalyst and solvent in batches at the condition of controlling both NCO % and the viscosity in the preparation process, and adjusting the solid content at each step, the resulting TDI isocyanurate has low content of free TDI, high xylene tolerance, small product color number, and high performance stability, which makes the product obtained by the isocyanurate have good application properties such as the drying, polishing and extinction properties of coating film, and such isocyanurate has good compatibility with other components.

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Patent Owner(s)

Patent OwnerAddress
WANHUA CHEMICAL (NINGBO) CO LTD315812 WANHUA INDUSTRIAL PARK 39 HUANDAO NORTH ROAD DAXIE DEVELOPMENT ZONE NINGBO CITY ZHEJIANG PROVINCE NINGBO CITY ZHEJIANG PROVINCE 315812
WANHUA CHEMICAL GROUP CO LTD264006 NO 59 CHONGQING STREET YANTAI ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE SHANDONG PROVINCE YANTAI CITY SHANDONG PROVINCE 264006
WANHUA CHEMICAL (BEIJING) CO LTDNO 5 STAR FIRE STREET BEIJING CHANGPING DISTRICT SCIENCE AND TECHNOLOGY PARK BEIJING BEIJING CITY BEIJING CITY 102200

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wang, Kai Shandong, CN 565 3689
Wen, Zhenguang Shandong, CN 1 0
Zhang, Xiao Shandong, CN 369 1003
Zhu, Yulin Shandong, CN 1 0

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