A hydrophobic sio 2 Coated halogen-free intumescent flame retardant and its preparation method and application

An intumescent flame retardant and hydrophobic modifier technology, applied in the field of flame retardants, can solve the problems of increasing the difficulty of waste liquid separation and treatment, and achieve the effects of avoiding dissolution loss, strong operability, and improving compatibility
CN109232991BActive Publication Date: 2020-09-29WUHAN POLYTECHNIC UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN POLYTECHNIC UNIVERSITY
Publication Date
2020-09-29

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Abstract

The invention discloses a hydrophobic SiO 2 Coated halogen-free intumescent flame retardant and its preparation method and application. The preparation method comprises: (1) obtaining a halogen-free intumescent flame retardant with a positive charge on the surface; (2) obtaining a nano-SiO with a negative charge on the surface 2 Collagen solution; (3) to obtain SiO 2 Coated halogen-free intumescent flame retardant; (4) obtain hydrophobic SiO 2 Encapsulated halogen-free intumescent flame retardant. The invention provides a simple preparation method of a hydrophobic halogen-free intumescent flame retardant, which can be carried out step by step, has strong operability, is beneficial to industrial production, and can effectively avoid the reaction of the halogen-free intumescent flame retardant in water-containing Existing in the system for a long time causes the problem of flame retardant dissolution loss.
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Description

technical field

[0001] The invention belongs to the technical field of flame retardants, and more specifically relates to a hydrophobic SiO 2 Coated halogen-free intumescent flame retardant and its preparation method and application. Background technique

[0002] Typical representatives of intumescent halogen-free flame retardants are ammonium polyphosphate, melamine phosphate, melamine, etc., which have excellent properties such as low smoke, low toxicity, and high-efficiency flame retardancy, and are widely used in polymer resin materials. However, these expandable halogen-free flame retardants are all inorganic materials, which have poor compatibility with polymer resin materials. In addition, ammonium polyphosphate, melamine phosphate, and melamine have different degrees of solubility in water, are easy to hydrolyze, and have moisture absorption and migration. Penetration and other disadvantages greatly reduce its application field.

[0003] Common modification methods...

Claims

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