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Composite intumescent flame retardant inflaming retarding general polypropylene and preparation method thereof

An intumescent flame retardant and composite intumescent technology, which is applied in the field of composite flame retardants, can solve the problems of damaging the mechanical properties of polypropylene materials, polluting the environment, and using a large amount of inorganic hydroxide flame retardants, and achieves low cost, The preparation process is simple and the effect of reducing the amount of combustion smoke

Inactive Publication Date: 2013-05-08
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional general-purpose polypropylene flame retardants are mainly divided into two categories: inorganic hydroxides and organic halogenated hydrocarbons. However, the large amount of inorganic hydroxide flame retardants damages the mechanical properties of polypropylene materials; organic halogenated hydrocarbons flame retardants The amount of addition is small, but toxic volatile gas is generated after burning, which pollutes the environment. Therefore, the use of green intumescent flame retardants in polypropylene is one of the highlights of the present invention

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0014] The parts indicated in the following examples all refer to parts by mass.

[0015] Acidification treatment of 4A molecular sieve: Firstly, crush the dried 4A molecular sieve to 20-50 μm, then mix the ammonium chloride solution (25%) and 4A molecular sieve at a mass ratio of 1:10, stir at 70°C for 1-6h, then dry and place in Calcined at 700°C for 4h, sealed for later use.

[0016] Example 1:

[0017] Mix 100 parts of general-purpose polypropylene, 20 parts of ammonium polyphosphate, 5 parts of pentaerythritol, 3 parts of acidified 4A molecular sieve, 1 part of SMA, and 1 part of antioxidant in a high-speed mixer, and extrude and granulate through a twin-screw extruder. The material is dried to obtain intumescent flame-retardant general-purpose polypropylene, wherein the extrusion temperature is 170-200°C, and the screw speed is 25-40r / min.

[0018] Example 2:

[0019] Mix 100 parts of general-purpose polypropylene, 15 parts of ammonium polyphosphate, 5 parts of pentae...

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PUM

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Abstract

The invention relates to a preparation method and an application of an inflaming retarding general polypropylene by utilizing an acidified 4A molecular sieve with the combination of an intumescent flame retardant and compositing. The composite intumescent flame retardant inflaming retarding general polypropylene provided by the invention comprises the following characteristic substances in parts by mass: 100 parts of a general polypropylene, 25 parts of composite intumescent flame retardant (0-25 parts of ammonium polyphosphate, 5-10 parts of pentaerythritol, 1-5 parts of melamine and 1-6 parts of the acidified 4A molecular sieve, 1-2 parts of antioxygen and 0-6 parts of a flame retardant synergist. The composite flame retardant provided by the invention is low in cost, environment-friendly and non-toxic and has good inflaming retarding effects when being applied to the general polypropylene, and the heat release rate in a conical calorimetric test is within 100kW / m<2>, so that the combustion smoke generation quantity is effectively reduced.

Description

technical field [0001] The invention relates to the use of an intumescent flame retardant in conjunction with other compounds to prepare a composite flame retardant, which is then applied to general-purpose polypropylene to obtain better flame-retardant performance. Background technique [0002] Traditional general-purpose polypropylene flame retardants are mainly divided into two categories: inorganic hydroxides and organic halogenated hydrocarbons. However, the large amount of inorganic hydroxide flame retardants damages the mechanical properties of polypropylene materials; organic halogenated hydrocarbons flame retardants The amount of addition is small, but toxic volatile gas is generated after burning, which pollutes the environment. Therefore, the use of green intumescent flame retardant in polypropylene is one of the highlights of the present invention. [0003] Secondly, the addition of intumescent flame retardant needs to reach a certain amount to exert the correspo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/06C08K9/00C08K7/26C08K3/32C08K5/053C08K5/3492B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 张胜董明哲谷晓昱姜鹏扈中武
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH