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Non-halogen fire-retardant polypropylene and production thereof

A technology of flame-retardant polypropylene and homopolypropylene, which is applied in the field of halogen-free flame-retardant polypropylene and its preparation, can solve the problems of difficulty in rescuing rescue work, fast flame propagation speed, and large combustion calorific value, etc., and achieves the suppression of CO and Effects of CO2 generation, low smoke generation, and excellent flame retardancy

Inactive Publication Date: 2005-12-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene has fatal disadvantages. Its oxygen index is very low, only 17.4. It is easy to burn, and the combustion calorific value is large, producing a large number of molten droplets. The flame spreads quickly and is not easy to extinguish.
The flame retardant polypropylene agents commonly used today are mostly compounded by adding halogen flame retardants such as bromine or chlorine, and supplemented with antimony trioxide auxiliary flame retardants. During the process, a large amount of black smoke containing toxic gases will be released, which will cause great difficulties to both the rescue work in the fire and the recovery work after the disaster

Method used

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preparation example Construction

[0011] The preparation method of halogen-free flame-retardant polypropylene of the present invention is as follows:

[0012] (1) mixing magnesium hydroxide / aluminum hydroxide with a coupling agent and a suitable solvent in proportion to prepare surface-treated nanoparticles;

[0013] (2) mixing and stirring a certain proportion of melamine and formaldehyde to obtain a prepolymer, and mixing and stirring the prepolymer and ammonium polyphosphate at 60-100° C. to obtain microcapsule ammonium polyphosphate;

[0014] (3) Proportionally mix polypropylene, nano magnesium hydroxide, aluminum hydroxide and microcapsule ammonium polyphosphate at high speed and extrude to granulate.

Embodiment 1

[0016] Embodiment 1: take by weighing polypropylene powder granule 50g, nanometer aluminum hydroxide 20g, nanometer magnesium hydroxide 20g, microcapsule ammonium polyphosphate 10g, coupling agent is 5% of nanoparticle weight, above-mentioned particle is mixed in high-speed mixer The mixing process is well done, and under the conditions of conventional feeding speed, temperature and screw speed, it is fed into a single-screw extruder, extruded, cooled, and pelletized to obtain the novel halogen-free flame-retardant polypropylene agent of the present invention.

Embodiment 2

[0017] Embodiment 2: take by weighing polypropylene powder granule 60g, nanometer aluminum hydroxide 20g, nanometer magnesium hydroxide 10g, microcapsule ammonium polyphosphate 10g, coupling agent is 3% of nanoparticle weight, above-mentioned particle is mixed in high-speed mixer The mixing process is well done, and under the conditions of conventional feeding speed, temperature and screw speed, it is fed into a single-screw extruder, extruded, cooled, and pelletized to obtain the novel halogen-free flame-retardant polypropylene agent of the present invention.

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Abstract

Non-halogen fire-retardant polypropylene and its production are disclosed. The polypropylene consists of homopolymer polypropylene particle and fire-retardant agent. The fire-retardant agent consists of aluminum hydroxide, magnesium hydroxide and polyammonium phosphate. The process is treating aluminum hydroxide and magnesium hydroxide from coupling agent, coating polyammonium phosphate from cyanurotriamide -formaldehyde resin, dispersing treated nanometer particle on polypropylene matrix, premixing for polypropylene powder, nanometer aluminum hydroxide, magnesium hydroxide and polyammonium phosphate microcapsule proportionally in high-speed mixer from single-screw extrude and blend method, adding into single-screw extruder at normal feed rate, temperature and rotation speed, extruding, cooling and granulating. It achieves smokeless, non-toxic, good fire-retardant performance and less pollution.

Description

1. Technical field: [0001] The invention relates to the technical field of flame-retardant polypropylene materials, in particular to a halogen-free flame-retardant polypropylene and a preparation method thereof. 2. Background technology: [0002] Polypropylene is widely used in industries such as home appliances, textiles, telecommunications / cables, and construction. However, polypropylene has a fatal disadvantage. Its oxygen index is very low, only 17.4. It is easy to burn, and the heat of combustion is large, producing a large number of molten droplets. The flame spreads quickly and is not easy to extinguish. The flame retardant polypropylene agents commonly used today are mostly compounded by adding halogen flame retardants such as bromine or chlorine, and supplemented with antimony trioxide auxiliary flame retardants. During the process, a large amount of black smoke containing toxic gases is released, which will cause great difficulties to both the rescue work in the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12
Inventor 陶杰耿妍崔益华苏新清
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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