Patent ID: 11970564
Assignee: SAFEKEY ENGINEERING TECHNOLOGY (ZHENGZHOU), LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. A method for synthesizing the structural flame retardant high strength low exothermic polymer grouting material for consolidating as recited in claim 1, comprising a step of polymerizing a modified isocyanate component with a polyol component, wherein a method for synthesizing the modified isocyanate component comprises steps of:
1) esterifying 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol with a molar ratio of 1:1, so as to obtain 2-carboxyethyl phenyl hypophosphite ethylene glycol, wherein a reaction equation is:, 2)performing an addition reaction to the 2-carboxyethyl phenyl hypophosphite ethylene glycol and propylene oxide with a molar ratio of 1:1, so as to generate a phosphorus-containing diol intermediate, wherein a reaction equation is:, , and
3) polymerizing the phosphorus-containing diol intermediate and toluene diisocyanate to obtain a difunctional modified flame retardant isocyanate compound, wherein a reaction equation is:,