Enhanced toughened halogen-free flame-retardant polypropylene mixture and preparation method thereof

A flame-retardant polypropylene, reinforcement and toughening technology, applied in the flame-retardant field of halogen-free flame-retardant polypropylene mixture, modified resin, can solve the problems of low flame-retardant efficiency, large surface polarity, large amount of addition, etc., to achieve comprehensive Effects of improved performance, ease of handling, and increased compatibility

Active Publication Date: 2011-04-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a reinforced and toughened halogen-free flame-retardant polypropylene mixture, which greatly improves the flame-retardant efficiency of the system and at the same time, aims at the shortcomings of the current inorganic flame retardants, such as large surface polarity, low flame-retardant efficiency, and large addition amount. , maintain or improve the tensile strength and impact strength of PP, and prepare reinforced toughened halogen-free flame-retardant polypropylene mixture

Method used

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  • Enhanced toughened halogen-free flame-retardant polypropylene mixture and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] 0.5 parts by mass of silane coupling agent (KH-560, Jiangxi Xinghuo Chemical Plant) was diluted with 20 parts by mass of dehydrated alcohol (analytical grade, Donghong Chemical Plant, Guangzhou), and mixed with 100 parts by mass of basic magnesium sulfate whiskers ( MHSH, grade WS-1S, average length 10-60 μm, diameter less than 10 μm, Shandong Yingkou Wesker Chemical Co., Ltd.) at 400 rpm high-speed mixer (JYHG-100W, Shenzhen Jiayuan Kechuang Plastic Machinery Co., Ltd.) mixed in medium for 30 minutes, and baked in an oven (model LG1008, Shanghai Experimental Instrument Factory) at 80° C. for 6 hours to obtain modified basic magnesium sulfate whiskers (m-MHSH).

[0033] Add 100 parts by mass of polypropylene (PP, brand T30S, melt index of 3.0g / 10min, China Petroleum & Chemical Corporation Maoming Branch) to an open double-roller heat refiner with a roll temperature of 170°C, 10 parts by mass of ethylene- Vinyl acetate copolymer (EVA, brand name EVA14-2, vinyl acetate (V...

Embodiment 2

[0037]After 3 parts by mass of silane coupling agent (KH-560, Jiangxi Xinghuo Chemical Plant) was diluted with 30 parts by mass of dehydrated alcohol (analytical grade, Donghong Chemical Plant, Guangzhou), mixed with 100 parts by mass of basic magnesium sulfate whiskers ( MHSH, grade WS-1S, average length 10-60 μm, diameter less than 10 μm, Shandong Yingkou Wesker Chemical Co., Ltd.) at 800 rpm high-speed mixer (JYHG-100W, Shenzhen Jiayuan Kechuang Plastic Machinery Co., Ltd.) Mix in medium for 15 minutes, bake in an oven (model LG1008, Shanghai Experimental Instrument Factory) at 100° C. for 4 hours to obtain modified basic magnesium sulfate whiskers (m-MHSH).

[0038] Add 100 parts by mass of polypropylene (PP, brand T30S, melt index of 3.0g / 10min, China Petroleum & Chemical Corporation Maoming Branch) to an open double-roller heat refiner with a roll temperature of 180°C, 20 parts by mass of ethylene- 1-octene copolymer (POE, trade mark DF610, melt index is 1.2g / 10min, Mits...

Embodiment 3

[0041] Dilute 2 parts by mass of titanate coupling agent (NXT-401, Guangzhou Baoxin Chemical Materials Co., Ltd.) with 30 parts by mass of absolute ethanol (analytical grade, Guangzhou Donghong Chemical Factory), and mix with 100 parts by mass of alkali Magnesium sulfate whiskers (MHSH, grade WS-1S, average length 10-60 μm, diameter less than 10 μm, Shandong Yingkou Wesker Chemical Co., Ltd.) in a high-speed mixer (JYHG-100W, Shenzhen Jiayuan Branch) at 600 rpm Chuang Plastic Machinery Co., Ltd.) for 20 minutes, and baked in an oven at 90°C for 5 hours to obtain modified basic magnesium sulfate whiskers (m-MHSH).

[0042] Add 100 parts by mass of polypropylene (PP, brand T30S, melt index 3.0g / 10min, China Petroleum & Chemical Corporation Maoming Branch) to an open double-roller heat refiner with a roll temperature of 170°C, and 40 parts by mass of the linear low Density polyethylene (LLDPE, brand name DFDA-7042, melt index is 2.0g / 10min, Maoming Branch of China Petroleum and C...

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Abstract

The invention discloses an enhanced toughened halogen-free flame-retardant polypropylene mixture and a preparation method thereof. The method comprises the steps of: diluting 0.5-3 parts by weight of surfactants with 20-30 parts by weight of absolute ethyl alcohol, then adding into 100 parts by weight of alkaline magnesium sulfate whiskers, mixing for 15-30 min in a mixer, and then drying in a dryer to obtain the modified alkaline magnesium sulfate whiskers, wherein the alkaline magnesium sulfate whiskers is required to be 10-60 mum in average length and less than 10 mu m in diameter; adding polypropylene resin firstly on an open type warming mill with double-roll temperature of 170-180 DEG C, sequentially adding an antioxidant, a toughened modifier, the modified alkaline magnesium sulfate whiskers, a synergistic flame retardant, a molten-drop prevention modifier and a compatibilization modifier after the polypropylene resin is molten and covers the rolls, and evenly mixing to obtain the enhanced toughened halogen-free flame-retardant polypropylene mixture. The polypropylene mixture prepared in the invention has the advantages of high strength, good toughness, low smoke, no toxicity, no molten drop, remarkable flame retardant property and the like.

Description

technical field [0001] The invention relates to modified resin flame retardancy, in particular to a halogen-free flame-retardant polypropylene mixture, in particular to a reinforced and toughened halogen-free flame-retardant polypropylene mixture. The invention also relates to a preparation method of the reinforced and toughened halogen-free flame-retardant polypropylene mixture. Background technique [0002] Polypropylene (PP) is widely used in electronic appliances, communication equipment, automobiles, building materials and other fields due to its advantages of low price, excellent mechanical properties, and easy molding and processing. However, due to the flammability of PP itself, its further application is limited. Although traditional halogen-containing flame retardants have good flame-retardant properties, they will produce a lot of smoke and toxic gases when they burn, causing secondary pollution. Therefore, it is of great significance to study halogen-free flame-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/08C08L51/06C08K13/06C08K9/04C08K9/06C08K7/04C08K3/04C08K5/523
Inventor 曾幸荣赖学军李红强张海丽尹昌宇
Owner SOUTH CHINA UNIV OF TECH
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