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Surface precipitation-free flame-retardant polypropylene compound and preparation method thereof

A technology for flame-retardant polypropylene and composites, which is applied in the field of non-surface-precipitated flame-retardant polypropylene composites and its preparation, and can solve problems such as difficulty in guaranteeing market supply, affecting mechanical properties of materials, and general flame-retardant efficiency

Active Publication Date: 2010-11-10
湖南美莱珀科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a mature and well-known technology to use the above-mentioned flame retardants and antimony oxides for polypropylene flame retardancy. Flame-retardant polypropylene such as decabromodiphenyl ether and decabromodiphenylethane will be affected due to large additions. Mechanical properties of materials, TBC and BT93 have average flame retardant efficiency and are expensive, OBE and other flame retardants have high flame retardant efficiency but are easy to precipitate from the surface of flame retardant polypropylene
In recent years, the most efficient flame retardant for polypropylene at home and abroad is octabromosulfide, such as Chinese patent 200610029852, U.S. patent 6780914 and 7067576, etc., which report the use of octabromosulfide and antimony trioxide compound system to flame-retardant polypropylene , although its flame retardant efficiency is high and its precipitation resistance is good, but due to the limited source of bisphenol S raw materials for the production of octabromo-S ether (mainly due to the serious pollution in the production process), the price is high and the market supply is difficult to guarantee

Method used

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  • Surface precipitation-free flame-retardant polypropylene compound and preparation method thereof
  • Surface precipitation-free flame-retardant polypropylene compound and preparation method thereof
  • Surface precipitation-free flame-retardant polypropylene compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081]Weigh 98KG of homopolymerized PP resin (melt index 20g / 10min), 0.5KG of aluminum 2-carboxyethylphenyl phosphinate, 1KG of melamine hydrobromide, 2-methyl-3-ethyl-2,3-bis Put 0.3KG of phenyl octane, 0.1KG of antioxidant-168, and 0.1KG of magnesium stearate into the mixer and mix them thoroughly, then put them into a twin-screw extruder, melt and extrude at 180-200°C, granulate and dry to obtain The flame retardant polypropylene precipitated on the surface, the flame retardant grade of the obtained flame retardant polypropylene is UL94 V-2 (1.6mm), after 1000 hours in the natural air environment at 80 ℃, no flame retardant precipitated on the surface.

Embodiment 2-26

[0083] Weigh each substance according to the amount shown in Table 1, then put it into a mixer for full mixing, put it into a twin-screw extruder for melt extrusion, granulate and dry to obtain a flame-retardant polypropylene without surface precipitation, and then test its flame-retardant And precipitation resistance, the results are shown in Table 1.

[0084] Table 1

[0085]

[0086]

[0087]

[0088]

[0089]

[0090]

[0091]

[0092]

Embodiment 27

[0094] Weigh 95KG of homopolymer PP resin (melt index 30g / 10min), 1KG of melamine phosphinate, 1KG of sodium 2-carboxyethylphenyl phosphinate, 2KG of melamine hydrobromide, 2,3-diethyl- Put 0.5KG of 2,3-diphenylbutane and 0.5KG of antimony trioxide into the mixer and mix them thoroughly, put them into a twin-screw extruder, melt and extrude them at 180-200°C, granulate and dry to obtain a product without surface precipitation Flame-retardant polypropylene, the resulting flame-retardant polypropylene has a flame-retardant rating of UL94V-2 (1.6mm), and after 1000 hours in a natural air environment at 80°C, no flame retardant is precipitated on the surface.

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Abstract

The invention relates to a surface precipitation-free flame-retardant polypropylene compound and a preparation method thereof. The surface precipitation-free flame-retardant polypropylene compound comprises the following components by weight percent: 70-98.5% of polypropylene resin, 1-15% of melamine hydrobromide, 0.3-7% of phosphinates, 0.2-4% of flame retardant synergist, 0-2% of synergetic flame retardant, 0-1% of antioxidant and 0-1% of processing acid. The preparation method thereof is implemented as follows: weighting the above components based on proportion, evenly mixing, melt-mixing the above mixture, pelletizing and drying to obtain the product in the invention. The surface precipitation-free flame-retardant polypropylene compound has high flame retardant efficiency, good flowability, no precipitation, and high flame retardant rating up to UL94 V-0, and can satisfy the use requirements of flame retardant materials in building materials, electrical appliance casings, sockets, bellows, lighting lamps and the like.

Description

technical field [0001] The invention relates to a flame-retardant polypropylene compound without surface precipitation and a preparation method thereof. Background technique [0002] Polypropylene (PP) has become one of the widely used general-purpose plastics because of its excellent comprehensive properties, good performance-price ratio, and wide processing and molding conditions. However, polypropylene is easy to burn, and its limiting oxygen index is 17.0-18.0%. It cannot be extinguished after being ignited in the air. Therefore, for facilities and places that are prone to fire, polypropylene must be flame-retardant modified. [0003] The flame retardant modification of polypropylene can be realized by adding flame retardants that can delay the combustion chemical and physical reaction process. As far as the prior art is concerned, the flame retardants used for polypropylene include halogen flame retardants and halogen-free flame retardants, and can also be a compound o...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K13/02C08K5/5313C08K5/3492C08K5/01C08K3/22C08K3/24C08K3/38C08K5/14C08K3/26C08L23/06C08L25/06C08L31/04
Inventor 彭维礼
Owner 湖南美莱珀科技发展有限公司
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