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Weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture and preparation method thereof

A flame-retardant polypropylene and moisture-resistant technology, which is applied in the field of weather-resistant and moisture-resistant halogen-free flame-retardant polypropylene mixture and its preparation, can solve the problems of limited application and unsatisfactory water resistance, so as to improve mechanical properties and increase synergistic flame retardancy The effect of low efficiency and production equipment requirements

Active Publication Date: 2015-03-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, Cao Kun et al. reported a silicon-containing N-substituted alkoxy hindered amine (Si-NORs) flame retardant, which was compounded with ammonium polyphosphate (APP), pentaerythritol (PER) and melamine (MEL). Flame Retardant Synergist and Its Application in Intumescent Flame Retardant Polypropylene. Industrial & Engineering Chemistry Research, DOI: 10.1021 / ie3017048), however, due to the use of PER with high water solubility as the carbon source in this mixture, the water resistance is not ideal, which greatly limits its application in humid environments

Method used

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  • Weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture and preparation method thereof
  • Weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture and preparation method thereof
  • Weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Preparation of triazine macromolecular char-forming agent (TCA).

Embodiment 1a

[0029] Add 50ml of distilled water to a 500ml four-necked flask equipped with a reflux condenser, a thermometer, a stirrer and a constant pressure dropping funnel, put the reaction flask in an ice-water bath, control the temperature at 0°C, and then add 18.45g of trimeric chlorine cyanogen, fully stirred to form a suspension, and then slowly added dropwise 6.10g of ethanolamine and 4g of sodium hydroxide aqueous solution 30ml while stirring, and adjusted the pH value of the reaction solution to about 5 by controlling the dropping rate, and the dropping time was 3h. After the dropping was completed, continue Reaction 2h.

[0030] After the first step reaction is completed, add a small amount of aqueous solution (30mL) containing 3.01g of ethylenediamine and 4g of sodium hydroxide dropwise into the reaction flask, then raise the temperature of the system to about 40°C, and then continue to slowly add dropwise of ethylenediamine and Sodium hydroxide aqueous solution, the pH value...

Embodiment 1b

[0033] Add 50ml of distilled water to a 500ml four-necked flask equipped with a reflux condenser, a thermometer, a stirrer and a constant pressure dropping funnel, put the reaction flask in an ice-water bath, control the temperature at 0°C, and then add 18.45g of trimeric chlorine Cyanide, fully stirred to form a suspension, then slowly add 6.10g of ethanolamine and 4g of sodium hydroxide aqueous solution 30ml dropwise while stirring, adjust the pH value of the reaction solution to about 6 by controlling the dropping speed, and the dropping time is 2h. After the dropping is completed, continue Reaction 3h.

[0034] After the first step reaction is completed, add a small amount of aqueous solution (30mL) containing 3.01g of ethylenediamine and 4g of sodium hydroxide dropwise into the reaction flask, then raise the temperature of the system to about 45°C, and then continue to slowly add ethylenediamine and Sodium hydroxide aqueous solution, the pH value is controlled to be about...

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Abstract

The invention discloses a weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture and a preparation method thereof and relates to the field of resin halogen-free flame retardant modification. The weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture comprises, by mass, 70-80 parts of a polypropylene resin, 10-20 parts of a phosphorus-nitrogen intumescent flame retardant, 5-15 parts of a triazine macromolecular charring agent, 0.5-1.5 parts of a hindered amine stabilizer, and 1-3 parts of a silicon mineral synergist. The weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture is prepared by carrying out uniform melt blending of the ingredients. Compared with the prior art, the weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture has the characteristics of outstanding weather resistance, good water resistance, good flame retardant properties, and excellent mechanical properties, and is mainly used in automobile exterior trimming parts, plastic seats in an outdoor stadium and plastic sports equipments.

Description

technical field [0001] The invention relates to the field of flame-retardant modification of resins, in particular to the field of non-halogen flame-retardant modification of polypropylene, and further to a weather-resistant and moisture-resistant halogen-free flame-retardant polypropylene mixture and a preparation method thereof. Background technique [0002] Polypropylene (PP) has the advantages of low density, low price, easy processing, excellent mechanical properties and chemical corrosion resistance. It is one of the most commonly used general-purpose resins and is widely used in automotive, construction, electronic appliances, wire and cable and other applications . However, PP is extremely flammable, with an oxygen index of only about 17% to 18%, and the burning speed is fast, the heat release is large, and a large number of molten droplets are produced, making it difficult to char and extinguish, which limits its flame retardant requirements. applications in high f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K13/06C08K5/3492C08K3/32C08K3/34C07D251/70
Inventor 曾幸荣周日敏赖学军李红强唐霜刘琼宇严路
Owner SOUTH CHINA UNIV OF TECH