Non-formaldehyde and low-water solubility ammonium polyphosphate product and preparation method thereof

Abstract

The invention relates to a non-formaldehyde and low-water solubility ammonium polyphosphate product and a preparation method thereof. The product needs to solve the problems of no formaldehyde and low water solubility; and the method needs to solve the problem of causing after-treatment troubles due to use of a reaction medium. According to the product, the phosphorus content ranges from 29.0% to 31.0%, and the water solubility at the temperature of 25 DEG C is smaller than or equal to 0.15 g / 100 ml water. The method comprises the following steps: (1) reacting amino siloxane on the surfaces of ammonium-lacking crystal II type ammonium polyphosphate particles; and (2) coating process: mixing the ammonium polyphosphate, whose surface reacts with the amino siloxane, with organic silicon epoxy resin for 5-60 minutes, mixing for 5-60 minutes after the temperature is heated up to 50-90 DEG C, reacting for 0.5-3 hours when the temperature is continuously heated up to 100-220 DEG C, cooling and screening to obtain the product.

Description

technical field [0001] The invention relates to the field of inorganic chemistry, in particular to a formaldehyde-free and low-water-soluble ammonium polyphosphate product and a preparation method thereof. The product can be used directly as a flame retardant for coatings and textiles. It can also be used in combination with carbon source and gas source as a halogen-free intumescent flame retardant for polyolefin and elastomer materials, including polypropylene, polyethylene, POE, TPO, TPE and polyurethane elastomer TPU. Background technique [0002] Crystalline type II ammonium polyphosphate (APP) is a biodegradable, environmentally friendly inorganic flame retardant mainly composed of phosphorus and nitrogen, which can be used for flame retardant of coatings, plastics and rubber. At present, the international flame retardant regulations and safety requirements for textiles are becoming increasingly stringent. Especially for specific use environments such as aviation, aut...

AI Technical Summary

Problems solved by technology

It can greatly reduce the water solubility of APP, but there are mainly the following problems: due to the use of melamine-formaldehyde resin, formaldehyde will be released in the process of use, especially when heated, which cannot meet the requirements of the European "formaldehyde content in textiles directly in contact with the skin should not exceed 30ppm". , the amount of formaldehyde in all other textiles shall not exceed 300ppm"

But there are the following problems: need to use organic solvents, the post-processing of the product is complicated, and has an impact on the environment; the processing efficiency is low, and the resin is lost with the solvent

[0008] The above-mentioned methods all have defects in varying degrees, and cannot meet the requirements of non-formaldehyde and water resistance at the same time.

At present, the commonly used formaldehyde-melamine resin coating has low water solubility and good water resistance, but there is a problem of formaldehyde, which will release formaldehyde slowly during use and processing

The effect of silicone resin and epoxy resin treatment is not ideal, and it cannot meet the water resistance requirements of aviation and automotive textiles with low water solubility, and cannot meet the water resistance requirements of aviation and automotive textiles, and requires a large amount of organic solvents

Treated with melamine, melamine has thickening properties, which will cause the viscosity of the emulsion to change, making the flame retardant slurry of textiles unstable, the storage period is short, and it cannot meet the requirements of aviation and automotive textiles in terms of water resistance

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