32327-39-2

Upstream product

• 50-00-0 formaldehyd 
• 2785-87-7 2-methoxy-4-n-propylphenol 
• 32359-71-0 6-Hydroxymethyl-4-propylguaiacol 

Downstream Products

• 41564-93-6 2,2',3,3'-Tetramethoxy-5,5'-dipropyl-diphenylmethan 
• 103651-41-8 2,2'-Bis-(2,3-dihydroxy-propoxy)-3,3'-dimethoxy-5,5'-dipropyl-diphenylmethan 
• 2020-97-5 Bis-(3-methoxy-5-propyl-2-diethylaminocarbonylmethoxy-phenyl)-methan 

Relevant academic research and scientific papers

Lignin-based diphenylmethane diisocyanate as well as preparation method and application thereof

The invention discloses a lignin-based diphenylmethane diisocyanate and a preparation method and application thereof. As shown in Formula I, the lignin-based diphenylmethane diisocyanate is prepared by reacting a lignin-cracking monomer compound II with a carbonyl compound to give compound III, compound III reacts with chloroacetyl ammonia to obtain compound IV, compound IV is subjected Smiles rearrangement reaction to obtain compound V, and compound V is reacted with a compound containing carbon-containing acid to obtain the lignin-based diphenylmethane diisocyanate shown in formula I. The product replaces MDI for synthesis of polyurethane materials, and the toughness of the polyurethane material is improved. Thermal stability and glass transition temperature. When being applied to polyurethane waterproof coating, the water absorption rate is obviously reduced, and the stability of the coating is improved.