2 results about "Phosphonium chloride" patented technology

The application discloses a PVA flame-retardant composite film with a cross-linking structure and a preparation method thereof, and belongs to the technical field of composite films. The preparation method comprises the following steps: S1, preparing a polyethyleneimine aqueous solution and a tetra(hydroxymethyl)phosphonium chloride aqueous solution respectively; S2, heating and dissolving PVA particles with distilled water as a solvent to obtain a PVA aqueous solution glue; uniformly mixing the polyethyleneimine aqueous solution and / or the tetra(hydroxymethyl)phosphonium chloride aqueous solution with the PVA aqueous solution glue, heating and standing to obtain a mixed glue; and adding the mixed glue into a mold, performing constant-temperature and constant-humidity drying treatment to obtain the PVA flame-retardant composite film with the cross-linking structure. The composite film has the characteristics of good flame retardancy and high strength.

The application discloses an ethyne hydrochlorination reaction catalyst, which is prepared by stirring nitrogen-containing precursors, phosphorus-containing precursors, copper sources and organic solvents uniformly, drying, high-temperature calcination and acid washing; the nitrogen-containing precursors are one or more of 1-butyl-3-methyl imidazole bromide, 1-butyl-3-methyl imidazole chloride, 2-methyl imidazole and pyridine; the phosphorus-containing precursors are one or more of phosphoric acid, triphenyl phosphine, tetraphenyl phosphonium bromide and tetraphenyl phosphonium chloride; and the copper source is copper chloride or copper nitrate. The catalyst obtained by the application has the advantages of high stability and high activity.