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

A red phosphorus flame retardant, ultra-fine technology, applied in chemical instruments and methods, color lakes, organic dyes, etc., can solve the problems of low content of coated red phosphorus, poor thermal stability, dust explosion, etc., achieve low toxicity, High thermal stability and high flame retardant effect

Inactive Publication Date: 2009-10-14
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Disperse 100 kg of commercially available red phosphorus in 400 kg of water, add 3.8 kg of formaldehyde and 1.7 kg of thiourea in a formaldehyde solution with a mass percentage of 37%. At room temperature, use a colloid mill to grind for 25 minutes, and check that the particle size of red phosphorus is 1-7 μm, and then the preparation of superfine red phosphorus can be completed.

[0032] Step 2: Add 5.7 kg of Acid Blue 1 (alias Acid Lake Blue VN150; Acid Lake Blue V; C.I.Acid Blue 1; C.I.42045) into the ultra-fine red phosphorus water dispersion system prepared in Step 1, stir and dissolve at room temperature for 30 minutes Finally, slowly flow in 5.5 kg of barium chloride solution with a mass percentage of 50%, and continue stirring at room temperature for 60 minutes. Complete the process of depositing ultra-fine red phosphorus from acid blue 1 barium salt.

[0033] Step 3: In the acid blue 1 barium salt deposition superfine red phosphorus aqueous dispersion ...

Embodiment 2

[0041] According to the method and steps in Example 1, Acid Blue 1 in Example 1 was replaced with Permanent Red F5R (alias: Pigment Red 48; C.I.40766), and the barium chloride aqueous solution was replaced with calcium chloride aqueous solution to obtain purple The performance analysis and test results of the red phosphorus flame retardant in red ultrafine microcapsules are shown in Table 1.

Embodiment 3

[0043] According to the method and steps in Example 1, the Acid Blue 1 in Example 1 was replaced with Pigment Red 53 (alias: C.I. Pigment Red 53, its barium salt lake is also called Jinguanghong C), and the red ultrafine Capsule red phosphorus flame retardant, the performance analysis and test results are shown in Table 1.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/04C08K9/10C09B63/00
Inventor 张田林苏婧文艳芬
Owner HUAIHAI INST OF TECH
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