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Preparation method for polypropylene resin graft

A polypropylene resin and graft technology, applied in the field of polypropylene resin graft preparation, can solve problems such as the inability to completely solve the problem of polypropylene degradation, reduce the degree of thermo-oxidative degradation, improve melt elasticity, and achieve high performance. The effect of viscosity

Active Publication Date: 2010-11-17
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 for polypropylene resin graft
  • Preparation method for polypropylene resin graft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Mix 2 kg of polypropylene powder (Bluestar Group Tianjin Petrochemical 3# special material, powder without antioxidant, melt index 3.0-5.9g / 10min) with 8 grams of antioxidant 1010 and antioxidant 168 The mixture (mixing weight ratio 1:1, produced by Ciba-Geigy, Switzerland) was uniformly mixed in a high-speed mixer, and then granulated on a WPZSK25 twin-screw extruder (melt temperature was 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 granule containing antioxidant is used as the raw material for grafting reaction, code-named PP-1 (wherein the polypropylene powder is 100 parts by weight, containing 0.4 part of antioxidant).

[0041] Add 0.08 gram of initiator dicumyl peroxide (produced by Beijing Duxin Fine Preparation Factory) into 2 gram of tripropylene trimellitate (Bailey Pharmaceutical R...

Embodiment 2

[0051] With the PP-1 that obtains after the polypropylene powder granulation in embodiment 1 is raw material, auxiliary monomer adopts 1.8 gram tripropylene trimellitate (Bailey Pharmaceutical Raw Material Co., Ltd.) and 0.2 gram styrene (Tianjin City Guangfu Institute of Fine Chemical Industry) carries out melting grafting reaction, and other conditions of grafting reaction are identical with embodiment 1, and the test result of grafting sample is listed in table 1 and figure 1 middle.

Embodiment 3

[0057] The mixture of 2 kilograms of polypropylene powder (same as Example 1) and 3 grams of antioxidant 1010 and antioxidant 168 (mixing weight ratio 1: 1, produced by Ciba-Geigy, Switzerland) is mixed uniformly in a high-speed mixer Finally, it was pelletized on a WP ZSK25 twin-screw extruder (melt temperature was 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 broken polypropylene resin granule containing antioxidant is used as the raw material of grafting reaction, code-named PP-2 (wherein the polypropylene powder is 100 parts by weight, containing 0.15 parts of antioxidant).

[0058] Add 0.16 grams of initiator dicumyl peroxide (produced by Beijing Duxin Fine Preparation Factory) into 1.2 grams of tripropylene trimellitate (Bailey Pharmaceutical Raw Material Co., Ltd.) and 1.2 grams of styrene (Tianjin Guangfu Fine Chemical...

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Abstract

The invention provides a preparation method for a polypropylene resin graft, and relates to a maleic anhydride grafted polypropylene resin. The polypropylene resin is polypropylene powder which does not contain an antioxidant. Based on 100 weight parts of the polypropylene powder, 0.05 to 1 part of the antioxidant and the polypropylene powder are melted and blended; a molten free radical grafting reaction is performed on the polypropylene resin; the grafting reaction is initialized by using an oxide initiator; auxiliary monomers are introduced besides adding polar monomer maleic anhydride; the auxiliary monomers comprise a first auxiliary monomer and a second auxiliary monomer; the first auxiliary monomer is a styrene monomer; the dosage of the first auxiliary monomer is 0.5 to 3 parts based on 100 weight parts of the polypropylene resin; the second auxiliary monomer is an organic monomer of which the molecules comprise two or more carbon-carbon double bonds; and the dosage of the second auxiliary monomer is 2 to 8 parts based on 100 weight parts of the polypropylene resin. The grafted polypropylene resin which has high grafting rate, high molecular weight and high viscosity can be prepared by the preparation method of the polypropylene resin graft of the invention.

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): C08F255/02
Inventor 刘轶群郭敏袁伟衡
Owner CHINA PETROLEUM & CHEM CORP
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