Soft PVC fire retardant, and preparation method thereof

[0016] A soft PVC flame retardant, comprising the following raw materials in parts by mass: 26 parts of ammonium polyphosphate, 18 parts of melamine and its derivatives, 12 parts of pentaerythritol phosphate, 34 parts of macromolecular triazine derivatives, lubricant 1.5 parts, 2 parts of coupling agent, 1 part of flame retardant synergist, 1.5 parts of modified nano-montmorillonite, 0.5 part of antioxidant.

[0017] Wherein, the melamine and its derivatives are melamine and melamine cyanurate.

[0018] Described lubricant is PE wax.

[0019] The coupling agent is γ-glycidyl etheroxypropyltrimethoxysilane.

[0020] The flame retardant synergist is zinc borate.

[0021] The particle size of the modified nano-montmorillonite is 1-100 μm. The modified nano-montmorillonite is a polymer / montmorillonite nanocomposite material.

[0022] Described antioxidant is phenyl diisooctyl phosphite.

[0023] The preparation method of this kind of soft PVC flame retardant comprises the foll

[0025] A soft PVC flame retardant, comprising the following raw materials in parts by mass: 28 parts of ammonium polyphosphate, 14 parts of melamine and its derivatives, 10 parts of pentaerythritol phosphate, 35 parts of macromolecular triazine derivatives, lubricant 2 parts, 1 part of coupling agent, 1 part of flame retardant synergist, 2 parts of modified nano-montmorillonite, 0.8 part of antioxidant.

[0026] Wherein, the melamine and its derivatives include melamine and melamine borate.

[0027] Described lubricant is calcium stearate.

[0028] The coupling agent is γ-(methacryloyloxy)propyltrimethoxysilane.

[0029] The flame retardant synergist is silicon oxide.

[0030] The particle size of the modified nano-montmorillonite is 1-100 μm. The modified nano-montmorillonite is a polymer / montmorillonite nanocomposite material.

[0031] Described antioxidant is diphenyloctyl phosphite.

[0032] The preparation method of this kind of soft PVC flame retardant comprises the

[0034] A soft PVC flame retardant, comprising the following raw materials in parts by mass: 25 parts of ammonium polyphosphate, 22 parts of melamine and its derivatives, 14 parts of pentaerythritol phosphate, 35 parts of macromolecular triazine derivatives, lubricant 2 parts, 0.5 parts of coupling agent, 0.5 parts of flame retardant synergist, 2.5 parts of modified nano-montmorillonite, and 0.5 parts of antioxidant.

[0035] Wherein, the melamine and its derivatives include melamine orthophosphate, di(melamine) pyrophosphate or melamine polyphosphate.

[0036] Described lubricant is stearic acid.

[0037] The coupling agent is γ-aminopropyltriethoxysilane.

[0038] The flame retardant synergist is zinc oxide and magnesium oxide.

[0039] The particle size of the modified nano-montmorillonite is 1-100 μm. The modified nano-montmorillonite is a polymer / montmorillonite nanocomposite material.

[0040] Described antioxidant is triphenyl phosphite,.

[0041] The preparation met