Colorized and ultrafine microencapsulated red phosphorus flame retardant and preparation method and application thereof

Abstract

The invention provides a colorized and ultrafine microencapsulated red phosphorus flame retardant with an average particle size of 0.1-20 Mum; and a preparation method thereof comprises the following steps: color lake chemical deposition is conducted to the surfaces of ultrafine red phosphorus particles and then a urea resin water solution, a melamine resin water solution or a phenol formaldehyde resin water solution is used for conducting microencapsulation to the ultrafine red phosphorus particles. The colorized and ultrafine microencapsulated red phosphorus flame retardant can serve as a red phosphorus flame retardant which is characterized by high phosphorus content, high thermal stability, high chemical stability, high ignition point and low hydroscopicity; in addition, the colorized and ultrafine microencapsulated red phosphorus flame retardant can serve as organic pigment which is characterized by pure chromaticity, high color fastness, strong migration resistance and low toxicity. When serving as the organic pigment to match with other dye or pigment, the colorized and ultrafine microencapsulated red phosphorus flame retardant does not have chemical reaction with the dye or pigment and the color matching has high color phase stability. The colorized and ultrafine microencapsulated red phosphorus flame retardant can be well compatible with synthetic materials and has wide application range.

Description

technical field [0001] The invention relates to a synthetic material additive, in particular to a colored superfine microcapsule red phosphorus flame retardant and a preparation method and application thereof. technical background [0002] Among non-halogen flame retardants, red phosphorus is an environmentally friendly flame retardant that has been used for more than 30 years. It has a wide range of sources, non-volatile, low price, and good flame retardant effect. Compared with phosphorus flame retardants such as ammonium polyphosphate and organic phosphate, it has the advantages of less addition, high flame retardant efficiency, low smoke, low toxicity, and wide application Etc. However, red phosphorus itself has many disadvantages: ① easy to absorb moisture and oxidize into phosphoric acid, phosphorous acid and highly toxic phosphine substances; ② red phosphorus itself has relatively poor thermal stability, and will spontaneously ignite when heated in air at 240 °C Phe...

AI Technical Summary

Problems solved by technology

However, red phosphorus itself has many disadvantages: ① easy to absorb moisture and oxidize into phosphoric acid, phosphorous acid and highly toxic phosphine substances; ② red phosphorus itself has poor thermal stability, and it will spontaneously ignite when heated in air at 240 °C ③In order to improve the dispersion of red phosphorus in synthetic materials, red phosphorus should be ultra-fine treatment, ultra-fine red phosphorus can easily cause dust explosion hazard; ④The purple red color of red phosphorus itself seriously causes the color difference of synthetic material products

However, the microencapsulated red phosphorus flame retardants on the market so far still have two major defects: dark purple or excessively microencapsulated red phosphorus content.