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Method for grafting maleic anhydride onto polypropylene resin

A technology for grafting polypropylene and polypropylene resin, applied in the field of preparation of polypropylene resin grafts, can solve problems such as the inability to completely solve the problem of polypropylene degradation, and achieve high grafting conversion efficiency and high grafting rate. Effect

Active Publication Date: 2009-09-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the simple method of adding styrene still cannot completely solve the degradation problem of polypropylene in the process of melting free radical grafting reaction.

Method used

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  • Method for grafting maleic anhydride onto polypropylene resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 0.02 gram of initiator dicumyl peroxide (produced by Beijing Duxin Fine Preparation Factory) was added by 0.4 gram of styrene (produced by Tianjin Guangfu Fine Chemical Research Institute) and 1.6 gram of trimethylolpropane triacrylate (produced by Beijing Dongfang Chemical Industry Co., Ltd. Factory) dissolved in the auxiliary monomer mixture mixed. Put 40 grams of polypropylene powder (Bluestar Group Tianjin Petrochemical 3# special material, powder without antioxidant, melt index 3.0-5.9g / 10min) and 1.2 grams of ground maleic anhydride powder in a plastic beaker Perform solid-phase dry mixing with a stirring paddle, and uniformly add the above-dissolved auxiliary monomer mixed solution containing the peroxide initiator during the mixing process. Finally, the mixed reactant was added into a Brabender PLE 651 type mixer, and at a temperature of 180° C., mixed at a speed of 30 rpm for 6 minutes, and then added with a weight ratio of 1:1 antioxidant 1010 ( Tetraerythrit...

Embodiment 2

[0037] The second auxiliary monomer trimethylolpropane triacrylate used in Example 1 was replaced by trimellitic acid tripropylene, and the remaining components and experimental conditions were the same as in Example 1. The relevant test results of the prepared samples are shown in Table 1.

Embodiment 3

[0041] The amount of the second auxiliary monomer trimethylolpropane triacrylate used in Example 1 was changed to 2.0 grams, and the remaining components and experimental conditions were the same as in Example 1. The relevant test results of the prepared samples are shown in Table 1.

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Abstract

The invention provides a method for preparing grafted polypropylene resin, relating to the technology of melt-grafting maleic anhydride onto polypropylene resin. In the method, a melt free radical grafting reaction is adopted to graft a maleic anhydride monomer onto a molecular chain of the polypropylene resin. Polypropylene resin adopts powder without an antioxidizer, wherein an auxiliary monomer is introduced in a melt grafting reaction triggered by a peroxide initiator besides the addition of the maleic anhydride monomer. The auxiliary monomer consists of a first auxiliary monomer and a second auxiliary monomer. The first auxiliary monomer is a styrene monomer and the second auxiliary monomer is an organic matter monomer with molecules including two or more carbon-carbon double bonds. The consumption of the auxiliary monomer accounts for 1%wt to 10%wt of the weight of the polypropylene resin and the proportion of the first auxiliary monomer and the second auxiliary monomer in the auxiliary monomer ranges from 5:95 to 70:30; the consumption of the maleic anhydride accounts for 1%wt to 8%wt of the weight of polypropylene. The method for grafting maleic anhydride onto polypropylene resin can obtain the grafted polypropylene resin with relatively high grafting ratio, molecular weight and viscosity coefficient.

Description

technical field [0001] The present invention relates to a kind of preparation method of polypropylene resin graft, more specifically, relate to the method for maleic anhydride graft polypropylene resin. Background technique [0002] Polypropylene is a versatile polymer material with excellent physical and mechanical properties. However, the non-polarity and low surface energy of polypropylene make it poorly compatible with most polymers and fillers, difficult to wet, poor in adhesion, printing and coating, and cannot be blended with polar materials. obtain better materials. Therefore some method is needed to improve the polarity of polypropylene. A commonly used modification method is to graft polar monomers such as maleic anhydride onto the main chain of polypropylene to increase the polarity of the matrix. Especially the fusion free radical grafting method, because of its simple and economical operation, is suitable for industrial production and has become the main meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F4/34B29C35/02
Inventor 刘轶群郭敏乔金樑张晓红
Owner CHINA PETROLEUM & CHEM CORP
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