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

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Problems solved by technology

[0009] However, the simple method of adding styrene still cannot completely solve the degr

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
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Effect test

Example Embodiment

[0038] Example 1:

[0039] Combine 2 kg of polypropylene powder (special material for Tianjin Petrochemical 3# of Bluestar Group, powder without antioxidant, melt index 3.0~5.9g / 10min) with 8 grams of antioxidant 1010 / 168 (mixed weight ratio 1:1, produced by Ciba-Geigy, Switzerland) After being evenly mixed in a high-speed mixer, it is melt-blended and granulated on a WP ZSK25 twin-screw extruder (melt temperature is 205°C). The obtained pellets are crushed with a plant crusher to obtain small particles with a diameter of about 1 mm, so as to appropriately increase the contact area with the auxiliary monomer. The broken polypropylene resin particles containing antioxidants are used as the raw material for the grafting reaction, and the code is PP-1.

[0040] Add 0.08 g of the initiator dicumyl peroxide (produced by Beijing Duxin Fine Preparation Factory) and 2 g of tripropylene trimellitate (Beiley Pharmaceutical Raw Materials Co., Ltd.) to dissolve. 40 grams of polypropylene PP-...

Example Embodiment

[0047] Example 2:

[0048] Combine 2 kg of polypropylene powder (special material for Tianjin Petrochemical 3# of Bluestar Group, powder without antioxidant, melt index 3.0~5.9g / 10min) and 3 grams of antioxidant 1010 / 168 (same example 1) After mixing uniformly in a high-speed mixer, melt blending and granulating on a WP ZSK25 twin-screw extruder (melt temperature is 205°C). The obtained pellets are crushed with a plant crusher to obtain small particles with a diameter of about 1 mm, so as to appropriately increase the contact area with the auxiliary monomer. The crushed polypropylene resin particles containing antioxidants are used as the raw material for the grafting reaction, and the code is PP-2.

[0049] Add 0.04 g of the initiator dicumyl peroxide (produced by Beijing Duxin Fine Preparation Factory) and 2 g of tripropylene trimellitate (Beiley Pharmaceutical Raw Materials Co., Ltd.) to dissolve. 40 grams of polypropylene PP-2 small particles and 1.2 grams of ground maleic an...

Example Embodiment

[0056] Example 3:

[0057] The PP-2 obtained by granulating the polypropylene powder in Example 2 was used as the raw material, and the amount of maleic anhydride powder was changed to 0.8g. The other conditions of the grafting reaction were the same as those in Example 2. The test results of the grafted sample 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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