A flame retardant material for fabric, its preparation method and coating process
A flame retardant material and coating process technology, applied in the field of flame retardants, can solve the problems of large addition amount, poor compatibility, deterioration of mechanical properties of materials, etc., and achieve good compatibility, good UV resistance and aging resistance, mechanical properties and Excellent flame retardant properties
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[0025] The embodiment of the present invention also provides a method for preparing a flame retardant material for fabrics, comprising the following steps:
[0026] S1. After mixing toluene, phosphorus-based flame retardant, organosiloxane and polyurethane, perform primary polymerization at a temperature of 70-100°C to obtain a polyurethane prepolymer.
[0027] It should be noted that the phosphorus-based flame retardant, organosiloxane and polyurethane are polymerized in toluene, and the two flame-retardant elements P and Si are first grafted on the polyurethane to form a polyurethane prepolymer, and then combined with N-containing monomers are polymerized. The inventors found that the sequence of polymerization has the most significant impact on the flame retardancy of the final product, and if the sequence of polymerization is reversed, a flame retardant material with excellent flame retardancy cannot be obtained.
[0028] Specifically, the time for one polymerization is 3...
Embodiment 1
[0042] This example provides a flame retardant material for fabrics, which is prepared from a variety of raw materials, including 5 parts of phosphorus-based flame retardants, 4 parts of organosiloxane, melamine cyanurate 5 parts, 50 parts of polyurethane and 20 parts of toluene; the phosphorus-based flame retardant is a phosphorus-based flame retardant containing hydroxyl.
[0043] This embodiment also provides a method for preparing a flame-retardant material for fabrics, which follows the components and dosage in the above-mentioned flame-retardant material formulation, and includes the following steps:
[0044] After mixing toluene, phosphorus-based flame retardant, organosiloxane and polyurethane, perform a polymerization at a temperature of 70°C for 10 hours to obtain a polyurethane prepolymer;
[0045] After the polyurethane prepolymer was mixed with melamine cyanurate, secondary polymerization was carried out at 40° C. for 5 hours.
Embodiment 2
[0047] This example provides a flame retardant material for fabrics, which is prepared from a variety of raw materials, including 10 parts of phosphorus-based flame retardants, 7 parts of organosiloxane, melamine cyanurate 10 parts, 80 parts of polyurethane and 30 parts of toluene; the phosphorus-based flame retardant is a phosphorus-based flame retardant containing hydroxyl.
[0048] This embodiment also provides a method for preparing a flame-retardant material for fabrics, which follows the components and dosage in the above-mentioned flame-retardant material formulation, and includes the following steps:
[0049] After mixing toluene, phosphorus-based flame retardant, organosiloxane and polyurethane, perform a polymerization at a temperature of 100°C for 3 hours to obtain a polyurethane prepolymer;
[0050] After mixing the polyurethane prepolymer and melamine cyanurate, the secondary polymerization was carried out at 60° C. for 2 hours.
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