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Preparation method of maleic anhydride drafted polypropylene resin graft polymer

A technology of polypropylene resin and grafted polypropylene, which is 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 achieves the advantages of reducing the degree of thermal oxidative degradation and improving melt elasticity. Effect

Active Publication Date: 2010-06-09
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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  • Preparation method of maleic anhydride drafted polypropylene resin graft polymer
  • Preparation method of maleic anhydride drafted polypropylene resin graft polymer
  • Preparation method of maleic anhydride drafted polypropylene resin graft polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix 2 kg of polypropylene powder (Bluestar Group Tianjin Petrochemical 3# special material, powder without antioxidant, melt index 3.0-5.9g / 10min) and 8 grams of antioxidant 1010 / 168 (mixing weight ratio 1:1, produced by Ciba-Geigy, Switzerland) after uniform mixing in a high-speed mixer, melt blending and granulation on a WP ZSK25 twin-screw extruder (melt temperature is 205 ° C). The obtained granules are crushed with a plant breaker to obtain small particles with a diameter of about 1 mm, so as to properly increase the contact area with the auxiliary monomers. The crushed polypropylene resin particles containing antioxidant are used as raw materials for grafting reaction, code-named PP-1.

[0040] 0.08 g of initiator dicumyl peroxide (produced by Beijing Duxin Fine Preparation Factory) was added and dissolved in 2 g of tripropylene trimellitate (Bailey Pharmaceutical Raw Materials Co., Ltd.). 40 grams of polypropylene PP-1 small particles and 1.2 grams of ground mal...

Embodiment 2

[0048] 2 kilograms of polypropylene powder (Bluestar Group Tianjin Petrochemical 3# special material, powder not containing antioxidant, melt index 3.0~5.9g / 10min) and 3 grams of antioxidant 1010 / 168 (same as the embodiment 1) After mixing uniformly in a high-speed mixer, melt blending and granulation on a WP ZSK25 twin-screw extruder (melt temperature is 205° C.). The obtained granules are crushed with a plant breaker to obtain small particles with a diameter of about 1 mm, so as to properly increase the contact area with the auxiliary monomers. The crushed polypropylene resin particles containing antioxidant are used as raw materials for grafting reaction, code-named PP-2.

[0049] 0.04 g of initiator dicumyl peroxide (produced by Beijing Duxin Fine Preparation Factory) was added and dissolved in 2 g of tripropylene trimellitate (Bailey Pharmaceutical Raw Material Co., Ltd.). 40 grams of polypropylene PP-2 small particles and 1.2 grams of ground maleic anhydride powder are ...

Embodiment 3

[0057] Using the PP-2 obtained after granulating the polypropylene powder in Example 2 as raw material, the amount of maleic anhydride powder was changed to 0.8g, and the other conditions of the grafting reaction were the same as in Example 2, and the test results of the grafted samples Listed in Table 1.

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Abstract

The invention provides a preparation method of a maleic anhydride drafted polypropylene resin graft polymer, relating to a maleic anhydride melt-drafted polypropylene resin technology. The polypropylene resin is an antioxidant-free polypropylene powder. The preparation method comprises the following steps of: melting and blending 0.1 to 1 part of antioxidant and the polypropylene powder in 100 parts by weight of the polypropylene, and then carrying out the melting free radical grafting reaction on the polypropylene resin melted and blended with the antioxidant; initiating the melting free radical grating reaction by a peroxide initiator, and introducing an auxiliary monomer except for adding grafting monomer maleic anhydride, wherein the auxiliary monomer is an organic monomer containing two or more carbon-carbon double bonds, the using amount of the auxiliary monomer is 2 to 8 parts in 100 parts by weight of the polypropylene resin, and the using amount of the maleic anhydride is 1 to 8 parts in 100 parts by weight of the polypropylene resin. The preparation method of the maleic anhydride drafted polypropylene resin can obtain the polypropylene resin graft polymer with higher molecular weight and melt strength.

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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IPC IPC(8): C08F255/02C08F218/16C08F222/14C08F212/36
Inventor 刘轶群郭敏
Owner CHINA PETROLEUM & CHEM CORP
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