A kind of multifunctional flame-retardant blanket and preparation method thereof
A multi-functional, flame-retardant acrylic fiber technology, applied in the direction of blankets, wet spinning, and artificial filaments made of viscose, can solve the problems of poor comfort, easy generation of static electricity, melting and dripping of pure polyester flame-retardant blankets, etc.
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Embodiment 1
[0023] Embodiment 1: Preparation of SOL FR
[0024] 1. Synthesis of multi-element synergistic flame retardants
[0025] 1.1 Synthesis of DDPS (2,2'-oxobis(5,5-dimethyl-1,3,2-dioxaphosphine-2,2'-disulfide))
[0026] Molecular formula C 5 h 10 o 2 PS-O-SPO 2 h 10 C 5
[0027] first step
[0028] Phosphor trichloride 328kg, neopentyl glycol 202.3kg, solvent benzene 165L, heated to 40°C, stirred and dissolved completely. Slowly add 305kg of pyridine dropwise, control the temperature at 45-75°C, keep it warm for 2 hours, wash with pure water, filter, and dry. A white intermediate was obtained for use.
[0029] second step
[0030] Above-mentioned intermediate 364kg, solubilizer dioxane 155L, pure water 38.5kg, heating dissolves intermediate. Slowly add 143.5kg of pyridine dropwise, control the temperature at 85-100°C, keep the reaction for 2 hours, wash with pure water, filter, and dry. White needle-like crystals were obtained for use.
[0031] Grinding to prepare 20%...
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