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High-efficiency environmental-friendly polypropylene compatilizer and preparation method thereof

A polypropylene and compatibilizer technology, applied in the field of polymer science, can solve problems such as excessive maleic anhydride residue, strong taste of maleic anhydride, difficult solvent environment, etc., and achieve excellent processing stability and ultra-low acid anhydride residue , Improve the effect of processing environment

Inactive Publication Date: 2009-12-02
SHANGHAI KELING INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, the preparation of maleic anhydride grafted polypropylene compatibilizers mostly adopts melt grafting, solution grafting, solid phase grafting and irradiation grafting, etc., wherein, melt grafting generally uses a twin-screw extruder to directly react Grafting (Zhou Chunhuai, Yang Junzhong, China Plastics, 13(1), 1999, 31-38; Wang Lishu; Wang Yilong; Chen Zhenyu, Modern Plastics Processing and Application, 19(2), 2007, 15-18; Wang Yazhen, CN02118793.2, etc.) , this kind of method has very big defects such as the residual amount of maleic anhydride is too high, the degradation of polypropylene is serious, and the grafting rate is difficult to control; although the grafting rate of solution grafting is high (Tan Gejiang, Li Tianjin, Ma Jingtao, Fang Jianghua, Ningbo Engineering Institute Journal of the Chinese Academy of Sciences, 19 (2), 2007, 1-5; Wang Qiang, CN200510101318.X), but need a large amount of solvents, the cost is high, the solvent is difficult to recycle and causes environmental pollution, and is not easy to large-scale production; Solid phase grafting (Liu Shengpeng, Zhang Liangjun , Tong Shenyi, Xu Lili, Synthetic Resins and Plastics, 22(4), 2005, 10-13, etc.) usually takes a long time, the reaction efficiency is low, and the maleic anhydride reacts on the surface of the substrate, so the grafting is not uniform. Acid anhydride has a strong taste and is not good for the environment; irradiation grafting (Yu Zhiqiang, Gu Hui, Zhang Zhiqian, Tian Maozhong, Materials Science and Technology, 8(1), 2000, 16-20) requires special equipment, and grafting Often on the surface, the grafting is uneven

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, 600 grams of homopolypropylene (molecular weight of 50,000), 200 grams of maleic anhydride, 50 grams of dibenzoyl peroxide, 100 grams of acrylamide, and 50 grams of tetra[β-(3', 5'-di-tert-butyl-4'-hydroxyphenyl) propionic acid] pentaerythritol ester was subjected to solid phase grafting reaction at 50°C and 3000 rpm for 2 hours to prepare polypropylene initiating masterbatch. After mixing 2% of polypropylene initiating masterbatch and 98% of homopolypropylene (molecular weight 300,000) on a high-speed mixer at room temperature at 2400 rpm, the melting temperature is 170 ℃ and the rotation speed is 60 rpm on the twin-screw extruder. The melt extrusion grafting reaction is performed to obtain a maleic anhydride polypropylene grafted material with a low odor with a grafting rate of 1.0% and an acid anhydride residual content of less than 0.5%.

Embodiment 2

[0031] Firstly, 900 grams of homopolypropylene (with a molecular weight of 100,000), 80 grams of maleic anhydride, 3 grams of di-tert-butyl peroxide, 5 grams of acrylic acid, 6 grams of triphenyl phosphite and 6 grams of thio were added to the autoclave. Dilauryl dipropionate was subjected to solid-phase grafting reaction at 120°C and 2400 revolutions / min for 0.5 hours to prepare polypropylene initiation masterbatch, and then 30% of the above-prepared polypropylene initiation masterbatch was mixed with homopolypropylene (molecular weight: 1.2 million) 70% was mixed on a high-speed mixer at room temperature at 3000 rpm, then melted and extruded on a twin-screw extruder with a melting temperature of 220°C and a rotating speed of 300 rpm to obtain the grafting rate A low-odor maleic anhydride polypropylene grafted material with 1.2% and an acid anhydride residual content of less than 0.2%.

[0032] The maleic anhydride grafted polypropylene compatibilizer prepared by the method of th...

Embodiment 3

[0045]First, 950 grams of homopolypropylene (molecular weight 2 million), 10 grams of maleic anhydride, 1 gram of azobisisobutyronitrile, 38 grams of α-methacrylic acid, and 1 gram of N,N′-bis [3-(3,5-Di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine was subjected to solid-phase grafting reaction at 130°C and 300 rpm for 0.2 hours to prepare polypropylene initiating masterbatch, and then After mixing 40% of the polypropylene initiator masterbatch prepared above and 60% of homopolypropylene (molecular weight 1.2 million) on a high-speed mixer at 1200 rpm at room temperature, the melting temperature of the twin-screw extruder is 240°C and the rotation speed is 600 The melt extrusion grafting reaction is carried out at revolutions per minute to obtain a low-odor maleic anhydride polypropylene grafted material with a grafting rate of 1.0% and a residual acid anhydride content of less than 0.5%.

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Abstract

The invention relates to a high-efficiency environmental-friendly polypropylene compatilizer and a preparation method thereof. 60-95 polypropylene, 0.1-10 initiating agent, 1-20 maleic anhydride, 0.5-15 comonomer and 0.1-7 antidegradant are put in a high-pressure reaction vessel by weight percent (the sum of weight percent of all the raw materials is equal to 100 percent.), the solid phase grafting reaction is performed to the mixture for 0.2-2 hours under the stirring action to obtain polypropylene initiation masterbatch, then 2-30 percent by weight of polypropylene initiation masterbatch and 70-98 percent by weight of pure polypropylene are mixed in a high-speed mixer at the room temperature, then the melting graft reaction is performed to the mixture on a double-screw extruder, and then the extrusion granulation is carried out to obtain the maleic anhydride grafted polypropylene compatilizer. Compared with the prior art, the method is simple and also suitable for the industrial production, and no solvent is required to be used, therefore, no harmful toxic matter emission exists, and meanwhile, the high-efficiency environmental-friendly polypropylene compatilizer has low residual quantity of acid anhydride and odor and is beneficial to environmental protection.

Description

Technical field [0001] The invention relates to the field of polymer science, in particular to a high-efficiency environmentally friendly polypropylene compatibilizer and a preparation method thereof. Background technique [0002] Polypropylene is widely used, but because polyolefin is a non-polar material, the compatibility of polypropylene with most polymers, inorganic fillers and metals is not good when compounding, which affects the properties of composite materials, such as mechanical properties and heat resistance. Performance, surface finish, coatability, etc., which limit its wide application. Maleic anhydride grafted polypropylene can improve the non-polar condition of its surface. Polar maleic anhydride grafts onto the polypropylene backbone to give the material special properties, which can well improve the blending and filling materials. Interface performance, which significantly improves the performance of composite materials, therefore, its application as a compatib...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F2/44C08K5/134C08K5/526C08K5/38C08L23/12C08L51/06
Inventor 沈曦徐玉军
Owner SHANGHAI KELING INDS
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