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Transparent flame-retardant polypropylene and preparation method thereof

A flame retardant polypropylene and polypropylene technology, applied in the field of transparent flame retardant polypropylene and its preparation, can solve problems such as easy flame spread and PP restriction, and achieve the effects of shortening production cycle, low production cost and simple operation

Inactive Publication Date: 2017-02-22
DONGGUAN DINGHAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical structure of PP determines that it is extremely flammable, and its oxygen index is 17.4 to 18.5. It is a flammable material, and it is easy to spread flames, which limits the application of PP in many fields.

Method used

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  • Transparent flame-retardant polypropylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A transparent flame-retardant polypropylene proposed by the present invention comprises the following raw materials in percentage by weight: 0.8% of bromopentaerythritol phosphonate flame retardant, 0.4% of antioxidant, a blend of white mineral oil and ethylene bis-stearamide 0.8%, the balance is extrusion grade PP-H with molecular weight between 800,000.

[0022] Its preparation method comprises the following steps:

[0023] S1. Put the blend of extrusion-grade PP-H, white mineral oil and ethylene bis-stearamide with a molecular weight of 800,000 in the weight percentage into the mixer, and stir rapidly for 4.5 at a speed of 400r / min. min, to obtain the primary blend A;

[0024] S2, adding the bromopentaerythritol phosphonate flame retardant and antioxidant in the step S1 to the primary blend A obtained in the weight percentage, carry out secondary blending and stirring, the stirring time is 4min, and the stirring speed is 600r / min, to obtain secondary blend B;

[0...

Embodiment 2

[0029] A transparent flame-retardant polypropylene proposed by the present invention comprises the following raw materials in weight percent: bromopentaerythritol phosphonate flame retardant 1.2%, bis(3,4-dimethylbenzylidene) sorbitol 0.2%, 0.4% antioxidant, 0.8% blend of white mineral oil and ethylene bis stearamide, and the balance is extrusion grade PP-R with a molecular weight of 500,000.

[0030] Its preparation method comprises the following steps:

[0031] S1. Put the blend of extrusion-grade PP-R, white mineral oil and ethylene bis-stearamide with a molecular weight of 500,000 in the weight percentage into the mixer, and stir rapidly for 4 minutes at a speed of 450r / min , to obtain the primary blend A;

[0032] S2. Add the bromopentaerythritol phosphonate flame retardant, antioxidant and particle diameter ≥ 325 mesh bis (3,4-dimethylbenzylidene) sorbitol to the obtained one in step S1. In the primary blend A, carry out secondary blending and stirring, the stirring ti...

Embodiment 3

[0037] A transparent flame-retardant polypropylene proposed by the present invention comprises the following raw materials in weight percent: bromopentaerythritol phosphonate flame retardant 0.8%, di-p-methylbenzylidene sorbitol and bis(3,4-dimethylphenylene oxide) 0.2% blend of methyl) sorbitol, 0.4% antioxidant, 0.8% blend of white mineral oil and ethylene bisstearamide, and the balance is extrusion grade PP-H with molecular weight between 1 million and PP-R blends.

[0038] Its preparation method comprises the following steps:

[0039] S1, put the blend of extrusion-grade PP-H and PP-R and the blend of white mineral oil and ethylene bis stearamide into the blender with a molecular weight of 1 million between 1 million and 380r / min speed of stirring for 3.5min to obtain primary blend A;

[0040] S2. The bromopentaerythritol phosphonate flame retardant, the antioxidant and the particle diameter ≥ 325 purpose di-p-methylbenzylidene sorbitol and bis (3,4-dimethylbenzylidene)...

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Abstract

The invention discloses transparent flame-retardant polypropylene which contains the following raw materials in percentage by weight: 0-3% of a flame retardant, 0-0.4% of a nucleating agent, 0.-0.6% of an antioxidant, 0.4-1.2% of a lubricant and the balance of polypropylene. The transparent flame-retardant polypropylene disclosed by the invention is good in flame retardancy and high in transparency grade, and due to addition of the nucleating agent, the transparency, the surface gloss, the tensile strength, the rigidity, the thermal deformation temperature, the impact resistance and the creep resistance of a polypropylene raw material can be greatly improved. The invention further discloses a preparation method of the transparent flame-retardant polypropylene. The transparent flame-retardant polypropylene is easy in adopted raw material obtaining, simple to operate and low in production cost. Due to addition of the nucleating agent, the production cycle is effectively shortened, the production efficiency is greatly improved, and the transparent flame-retardant polypropylene disclosed by the invention can be applied to the fields such as domestic capacitors and transparent packaging, has wide market prospects, and is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of fine chemical materials, in particular to a transparent flame-retardant polypropylene and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a semi-crystalline thermoplastic. With good mechanical properties, chemical corrosion resistance and heat resistance, it is one of the most widely used general-purpose plastics, and is widely used in household appliances, automobiles, textiles, OA offices, furniture and bathrooms, food packaging and other industries. However, the chemical structure of PP determines that it is extremely flammable, and its oxygen index is 17.4 to 18.5. It is a flammable material, and it is easy to spread flames, which limits the application of PP in many fields. With the advancement of science and technology, people pay more and more attention to the protection of life and property, which makes the materials in traditional fields need to improve their fu...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L91/00C08K5/5337C08K5/20C08K5/053
CPCC08L23/12C08K2201/014C08L2201/02C08L2201/08C08L2201/10C08L2205/025C08L2205/03C08L2205/24C08L91/00C08K5/5337C08K5/20C08K5/053
Inventor 王海民李景波潘国龙
Owner DONGGUAN DINGHAO NEW MATERIAL TECH CO LTD