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Halogen-free expansion-type flame retardant for polyethylene and preparation method thereof

An intumescent flame retardant and flame retardant technology, which is applied in the field of polymer compounding, can solve the problems of limited application, large amount of flame retardant added, and decreased mechanical properties of materials, so as to achieve the goal of expanding the scope of use and good flame retardancy Effect

Active Publication Date: 2010-12-29
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the implementation of the European Union's "Directive on Prohibiting the Use of Certain Hazardous Substances in Electrical and Electronic Equipment" (RoHS-200295EC) and my country's "Administrative Measures for Pollution Control of Electronic Information Products" (China's RoHS) directive, the use of halogen-containing flame retardant Therefore, the development of halogen-free flame retardants for polyethylene has become a hot research topic today.
[0004] Due to the special structure of PE, most of the halogen-free flame retardants for polyethylene on the market are mainly inorganic hydroxides. Although they can make the flame retardancy of the polymer meet the requirements, the amount of flame retardant added is large. lead to a significant decrease in the mechanical properties of the material
[0005] In the prior art, there are also many patents on PE-specific intumescent flame retardants, such as CN200610147542.7 and CN200610104613.5, but the flame-retardant performance of the flame-retardant PE developed by them has not reached the UL-94V-0 level. Its application in wires, cables, etc.

Method used

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  • Halogen-free expansion-type flame retardant for polyethylene and preparation method thereof
  • Halogen-free expansion-type flame retardant for polyethylene and preparation method thereof
  • Halogen-free expansion-type flame retardant for polyethylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This example describes a method for preparing a macromolecular triazine derivative hydroxyalkylaminodiamine triazine oligomer. The molecular structural formula of the prepared hydroxyalkylaminodiaminetriazine oligomer is as follows:

[0023]

[0024] In the formula, n is 20-200.

[0025] Preparation : Add 46.1g of cyanuric chloride and 20mL of acetone in a 500mL reaction flask equipped with a reflux condenser, a constant pressure dropping funnel, a stirrer and a thermometer, and stir fully to make the cyanuric chloride disperse evenly. At 5°C, add 22.25g propanolamine and NaOH solution (10g NaOH dissolved in 25mL distilled water) dropwise evenly while stirring, and react at -5-5°C for 1-3 hours after the addition is complete. Then raise the temperature to room temperature, then evenly add 29g hexamethylenediamine and NaOH solution (10g NaOH dissolved in 25mL distilled water) dropwise to the reaction flask, raise the reaction temperature to 40-65°C after the dropwise...

Embodiment 2～13 and comparative example 1

[0027] See Table 1. According to the addition amount listed in Table 1, the coated ammonium polyphosphate, macromolecular triazine derivatives, melamine and its derivatives, polymer / inorganic nanocomposites, flame retardant synergists, coupling agent and antioxidant, fully mixed in a high-speed mixer with a rotation speed of 5000 rpm for 20 to 40 minutes to prepare a halogen-free intumescent flame retardant for polyethylene.

[0028] Polyethylene and the flame retardant obtained above are mixed in a ratio of 7:3 (weight ratio), extruded with an extruder, and the process of the extruder is:

[0029]

[0030] Then sample preparation by injection molding, the injection molding process is:

[0031]

[0032] Finally, a flame-retardant polyethylene material sample was obtained, and the combustion performance of the sample was tested, and the obtained results are also shown in Table 1.

[0033] Compared with Comparative Example 1, it can be seen that the flame retardant of the...

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Abstract

The invention relates to a halogen-free expansion-type flame retardant for polyethylene and a preparation method thereof. The flame retardant comprises the following components in percentage by mass: 30 to 60 percent of coated ammonium polyphosphate, 5 to 40 percent of macromolecular triazine derivative, 5 to 30 percent of melamine and derivative thereof, 0.1 to 15 percent of polymer / inorganic nano composite material, 0.05 to 8 percent of synergetic flame retardant, 0.05 to 5 percent of coupling agent and 0.01 to 3 percent of antioxidant. Compared with the prior art, the halogen-free expansion-type fire retardant radically avoids the harm of a halogenated fire retardant for the polyethylene to environment and human body, and ensures that the polyethylene material has the flame retardancy reaching a UL-94 V-0 level.

Description

technical field [0001] The invention relates to polymer compounding technology in the field of chemical industry, in particular to a polyolefin, that is, a halogen-free intumescent flame retardant for compounding polyethylene and a preparation method thereof. Background technique [0002] Among polyolefin materials, polyethylene (PE) is the most widely used. Polyethylene is light in weight, cheap, and has many advantages such as excellent electrical insulation and chemical resistance. It has been widely used in various industries in today's society. , Moreover, polyethylene material has high strength and good cold resistance, and is widely used in the production of pipes in the construction industry. However, the flame retardancy of polyethylene material is poor, and the oxygen index (OI value) is only 17.5, which is a kind of flammable polymer material. Wires and cable pipes made of it are easy to burn and cause fires under conditions such as high pressure and heat. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/06C08K9/10C08K5/3492C08K5/524C08L77/00C08L23/06
Inventor 郝冬梅刘彦明陈崇伟林倬仕尹亮陈涛
Owner SHANGHAI RES INST OF CHEM IND
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