Inventor

WANG NUANCHENG

CN3 patents

Patents

3 patents

US12304993B2May 20, 2025

Storage-stable polyisocyanate composition and preparation method

WANHUA CHEMICAL GROUP CO LTD0 citations58

US11059772B2Jul 13, 2021

Imine-type quaternary ammonium salt catalyst, preparation method thereof and use thereof for preparation of polyisocyanate composition

WANHUA CHEMICAL GROUP CO LTD0 citations56

US12516191B2Jan 6, 2026

Isocyanurate-containing polyisocyanate composition with stable chromaticity, and preparation method thereof

WANHUA CHEMICAL GROUP CO LTD0 citations42