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Polypropylene halogen-free flame-retardant material and preparation method thereof

A flame retardant material, polypropylene technology, applied in the field of polypropylene, can solve the problems of poor toughness and easy whitening of polypropylene, and achieve the effects of improving elongation at break, reducing dosage requirements, and improving mechanical properties

Inactive Publication Date: 2021-03-09
东莞市鑫塑源塑胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the flame retardant properties of polypropylene to meet the needs of use, it is often necessary to add a large amount of flame retardants to polypropylene, resulting in poor toughness and whitening of polypropylene

Method used

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  • Polypropylene halogen-free flame-retardant material and preparation method thereof
  • Polypropylene halogen-free flame-retardant material and preparation method thereof
  • Polypropylene halogen-free flame-retardant material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A polypropylene halogen-free flame-retardant material, comprising the following raw materials in parts by weight:

[0026]

[0027] Described toughening agent is made through the following steps:

[0028] (1) Add 50 parts by weight of nano-silica and 1 part by weight of γ-aminopropyltriethoxysilane to 100 parts by weight of absolute ethanol, ultrasonically disperse for 2 hours, then centrifuge, wash and dry to obtain Modified nano silica;

[0029] (2) Add 40 parts by weight of diphenylmethane diisocyanate and 20 parts by weight of modified nano-silicon dioxide in 100 parts by weight of dimethylacetamide, heat up to 50°C and stir for 2h, then drop to normal temperature, Add 25 parts by weight of polytetrahydrofuran ether glycol and 0.1 part by weight of catalyst, raise the temperature to 50°C and react for 2 hours, add 100 parts by weight of deionized water, and after the precipitation is completely precipitated, add 20 parts by weight of nano aluminum hydroxide, and...

Embodiment 2

[0040] A polypropylene halogen-free flame-retardant material, comprising the following raw materials in parts by weight:

[0041]

[0042] Described toughening agent is made through the following steps:

[0043] (1) Add 60 parts by weight of nano silicon dioxide and 3 parts by weight of γ-aminopropyltriethoxysilane to 100 parts by weight of absolute ethanol, ultrasonically disperse for 3 hours, then centrifuge, wash and dry to obtain Modified nano silica;

[0044] (2) Add 50 parts by weight of diphenylmethane diisocyanate and 30 parts by weight of modified nano-silicon dioxide in 100 parts by weight of dimethylacetamide, heat up to 70°C and stir for 3h, then drop to normal temperature, Add 30 parts by weight of polytetrahydrofuran ether glycol and 0.3 parts by weight of catalyst, raise the temperature to 70°C and react for 4 hours, add 200 parts by weight of deionized water, after the precipitation is completely precipitated, add 30 parts by weight of nano aluminum hydroxi...

Embodiment 3

[0055] A polypropylene halogen-free flame-retardant material, comprising the following raw materials in parts by weight:

[0056]

[0057] Described toughening agent is made through the following steps:

[0058] (1) Add 55 parts by weight of nano silicon dioxide and 2 parts by weight of γ-aminopropyltriethoxysilane to 100 parts by weight of absolute ethanol, ultrasonically disperse for 2.5 hours, then centrifuge, wash and dry, Obtain modified nano silicon dioxide;

[0059] (2) Add 45 parts by weight of diphenylmethane diisocyanate and 25 parts by weight of modified nano-silica to 100 parts by weight of dimethylacetamide, raise the temperature to 60°C and stir for 2.5h, then drop to normal temperature , add 27.5 parts by weight of polytetrahydrofuran ether glycol and 0.2 parts by weight of catalyst, raise the temperature to 60 ° C and react for 3 hours, add 150 parts by weight of deionized water, after the precipitation is completely separated out, add 25 parts by weight of...

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Abstract

The invention relates to the technical field of polypropylene, in particular to a polypropylene halogen-free flame-retardant material and a preparation method thereof, and the polypropylene halogen-free flame-retardant material comprises the following raw materials: polypropylene, a halogen-free flame retardant, a toughening agent, a compatilizer, a nucleating agent and an antioxidant. According to the toughening agent disclosed by the invention, the prepared polypropylene material has a hierarchical structure of nano silicon dioxide-polyurethane-nano aluminum hydroxide-polypropylene, nano silicon dioxide and nano aluminum hydroxide are used as rigid bodies, so that stress concentration points are more easily generated, and crazes are formed at the periphery to absorb impact energy; the polyurethane serving as an interlayer can better absorb impact energy in two directions and is favorable for stopping crazing, so that the impact resistance of the polypropylene is greatly improved; besides, polyurethane is used as an elastomer, so that the elongation at break of polypropylene can be improved, and nano aluminum hydroxide is used as a synergistic flame retardant, so that the dosage requirement of the halogen-free flame retardant can be reduced, the mechanical property of polypropylene is improved, and the V0-grade flame retardant property is maintained.

Description

technical field [0001] The invention relates to the technical field of polypropylene, in particular to a polypropylene halogen-free flame-retardant material and a preparation method thereof. Background technique [0002] Polypropylene is a translucent or opaque milky-white material with high toughness and flame retardancy in an appropriate temperature range, and is widely used in many fields. [0003] With the high performance of automobiles, electronic and electrical equipment, and the acceleration of the lightweight process of mechanical equipment, the demand for polypropylene materials will further accelerate, which can be used to make heat-resistant parts around automobile engines, and those that require boiling disinfection and high-pressure sterilization. Medical equipment and tableware, etc., can also be used to make axle pedals of automobiles that need to resist bending fatigue, covers of documents, covers, and various containers. [0004] In order to improve the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L75/08C08L51/06C08K13/06C08K9/06C08K3/36C08K3/22
CPCC08L23/12C08L2201/02C08L2201/22C08L2205/08C08L2205/03C08K2201/011C08K2003/2227C08K2201/003
Inventor 谢宏建刘小雄谢伟良
Owner 东莞市鑫塑源塑胶科技有限公司
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