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Environmental protection halogen-free anti-flaming polypropylene composite material and preparation method thereof

A flame retardant polypropylene and composite material technology, applied in the field of flame retardant composite materials, can solve the problems of material mechanical properties decline and inability to process, achieve the effect of small smoke generation, excellent flame retardant performance, and solve potential harm

Inactive Publication Date: 2008-08-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US4987173 has reported the polyolefin composite material that contains fibrous inorganic filler, and its inorganic filler is magnesium hydroxide, magnesia, gypsum or more than two kinds of composites, and when the addition amount is 70 (weight parts), can't process
[0004] In the prior art, the addition amount of halogen-free flame retardants needs to reach more than 50-60 (parts by weight) to achieve the flame retardant effect, and with the increase of the addition amount, the mechanical properties of the material decrease significantly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Accurately weigh 100 parts by weight of polypropylene powder, 30 parts by weight of magnesium hydroxide, 3 parts by weight of red phosphorus, 10 parts by weight of MBS, 20 parts by weight of PP-g-MAH, antioxidant (2,4-di-tert-butyl 0.2 parts by weight of phenyl) tricarbonate and a small amount of lubricant white oil are stirred in a high-speed mixer for two minutes; the premix is ​​melt-extruded on a twin-screw extruder, cooled, pelletized, dried, and injected. Nine temperature intervals of the extruder: the first interval is 175°C, the second interval is 180°C, the third interval is 189°C, the fourth interval is 197°C, the fifth interval is 201°C, the sixth interval is 201°C, the seventh interval is 202°C, the eighth interval is 205°C, and the ninth interval 205°C, the host speed is 22r / min. The pellets were molded into the desired test specimens in an injection molding machine. Determination of flame retardancy and mechanical properties of flame retardant materials. ...

Embodiment 2

[0025] Accurately weigh 100 parts by weight of polypropylene powder, 40 parts by weight of magnesium hydroxide, 3 parts by weight of red phosphorus, 10 parts by weight of MBS, 20 parts by weight of PP-g-MAH, antioxidant (2,4-di-tert-butyl 0.2 parts by weight of phenyl) tricarbonate and a small amount of lubricant white oil are stirred in a high-speed mixer for two minutes; the premix is ​​melt-extruded on a twin-screw extruder, cooled, pelletized, dried, and injected. Nine temperature intervals of the extruder: the first interval is 175°C, the second interval is 180°C, the third interval is 189°C, the fourth interval is 197°C, the fifth interval is 201°C, the sixth interval is 201°C, the seventh interval is 202°C, the eighth interval is 205°C, and the ninth interval 205°C, the host speed is 22r / min. The pellets were molded into the desired test specimens in an injection molding machine. Determination of flame retardancy and mechanical properties of flame retardant materials. ...

Embodiment 3

[0027] Accurately weigh 100 parts by weight of polypropylene powder, 50 parts by weight of magnesium hydroxide, 3 parts by weight of red phosphorus, 10 parts by weight of MBS, 20 parts by weight of PP-g-MAH, antioxidant (2,4-di-tert-butyl 0.2 parts by weight of phenyl) tricarbonate and a small amount of lubricant white oil are stirred in a high-speed mixer for two minutes; the premix is ​​melt-extruded on a twin-screw extruder, cooled, pelletized, dried, and injected. Nine temperature intervals of the extruder: the first interval is 175°C, the second interval is 180°C, the third interval is 189°C, the fourth interval is 197°C, the fifth interval is 201°C, the sixth interval is 201°C, the seventh interval is 202°C, the eighth interval is 205°C, and the ninth interval 205°C, the host speed is 22r / min. The pellets were molded into the desired test specimens in an injection molding machine. Determination of flame retardancy and mechanical properties of flame retardant materials. ...

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PUM

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Abstract

The invention discloses a new environment-friendly halogen-free fire retardant polypropylene composite material, which is composed of polypropylene of 100 parts by weight, magnesium hydrate of 10-100 parts by weight, red phosphorus of 1-10 parts by weight, elastomer of 5-20 parts by weight, compatibilizer of 10-30 parts by weight, anti-oxidant of 0.1-0.5 parts by weight and some lubricant, wherein the polypropylene powder, magnesium hydrate and red phosphorus are premixed in a high-speed mixer, under general feeding speed, temperature and screw rod rotation speed, to be fed into a two-screw extruder to be extruded, cooled, cut, dried and injected to obtain the final product. The inventive fire retardant polypropylene material overcomes the defects of traditional halogen fire retardant polypropylene material as environment pollution and hurt on human body, with little smoke, non toxicity, environment protection, better fire retardancy and mechanical property.

Description

technical field [0001] The invention relates to an environment-friendly halogen-free flame-retardant polypropylene composite material and a preparation method thereof, belonging to the technical field of flame-retardant composite materials. Background technique [0002] Polypropylene (PP) is a thermoplastic material with excellent comprehensive properties, which is widely used in textile fibers, household products, industrial parts, etc. But the flammability of PP limits its application in many fields. In order to improve the flame retardancy of PP and broaden its application range, flame retardants can be added. At present, most flame-retardant polypropylenes on the market still use halogen and antimony flame-retardant systems. Due to the potential danger of the currently used halogen / antimony flame retardant system to the environment and human body, under the EU RoHS Directive, the development of halogen-free and environmentally friendly flame retardant PP is also very n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/524C08L83/04C08L23/08C08L51/06C08K3/22C08K3/02
Inventor 施利毅韩丹丹丁鹏杨慧
Owner SHANGHAI UNIV
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