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AssigneeWanhua Chemical Group Co., Ltd.
InventorsLidong Sun, Shuchang Sun, Yonghua Shang, Hao Hu, Haotian Zhang, Bin Shi, Peimeng Shi, Wei Liu
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Disclosed is an aliphatic polyisocyanate composition, wherein the molar ratio of an iminooxadiazinedione structure to an isocyanurate structure is 0.01-0.8:1, and the molar ratio of an iminooxadiazinedione structure in a polymer larger than three molecules to the iminooxadiazinedione structure in the composition is 0.2-0.8:1. Provided are a method for preparing the aliphatic polyisocyanate composition, and a coating composition. The aliphatic polyisocyanate composition has both a lower viscosity and a better crosslinking property. The composition can significantly reduce the usage amount of a solvent when used in a coating composition, is more environmentally friendly and also has a better paint film property. The preparation method has a simple process and mild conditions, is easy to operate and control, and is suitable for industrial scale production.
An aliphatic polyisocyanate composition, which is prepared by taking an aliphatic diisocyanate as a starting material, is composed of a trimolecular polymer and a polymer larger than three molecules, both of which are formed by the aliphatic diisocyanate, and comprises an iminooxadiazinedione structure and an isocyanurate structure, wherein a molar ratio of the iminooxadiazinedione structure in the composition to the isocyanurate structure in the composition is 0.01-0.8:1, and a molar ratio of the iminooxadiazinedione structure in the polymer larger than three molecules to the iminooxadiazinedione structure in the composition is 0.2-0.8:1;
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