Financial news, November 26, 2024, the State Intellectual Property Office information shows that Wanhua Chemical Group Co., Ltd. applied for a patent entitled "a polyisocyanate composition and its preparation method and application", public number CN 119019644A, the application date is September 2024.

The invention relates to a polyisocyanate composition and a preparation method and application thereof, which comprises a variety of diisocyanate derivatives. The diisocyanate derivatives are obtained by replacing at least one isocyanate group in the diisocyanate by at least one substituent group. The least one substituting group comprises an isocyanurate group, a biuret substituting group, and one or more of the substituting urea groups; The molar ratio of the substituted biuret group and the substituted urea group contained in the polyisocyanate composition is greater than 0 and less than or equal to 0.5; The viscosity of the polyisocyanate composition is less than 10000mPa.s; The diisocyanate comprises one or more aliphatic diisocyanates and alicyclic diisocyanates. The invention relates to an embodiment of a polyisocyanate composition, which has the characteristics of low viscosity and good storage stability.