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Preparation method of polar polypropylene

A polypropylene and polar technology, which is applied in the production of bulk chemicals, can solve the problems of solvent recovery, serious degradation of grafted products, and low grafting, and achieve improved product performance, excellent mechanical properties, and high grafting rate. Effect

Active Publication Date: 2018-07-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of using supercritical propylene as a swelling agent to carry out swelling assisting solid phase graft modification to prepare polar polypropylene, which overcomes the high reaction pressure, solvent recovery, environmental pollution and grafting in the prior art. Low, and serious degradation of grafted products and other shortcomings

Method used

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  • Preparation method of polar polypropylene
  • Preparation method of polar polypropylene

Examples

Experimental program
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Effect test

Embodiment example 1

[0017] Get 100g melt flow rate and be the homopolypropylene of 3g / 10min, initiator is BPO, DCP and AIBN, and quality is respectively 2g, 3g and 2g, and grafting monomer selects AA, BA and MAH, and quality is respectively 4g, 6g and 15g, placed in an autoclave, placed in a constant temperature oil bath with a preset temperature, first filled with propylene to replace the air in the autoclave, and then injected propylene to the specified pressure with a high-pressure pump. The reaction temperature is controlled at 108° C., the reaction pressure is 4.6 MPa, and the reaction time is 3.6 h. After the reaction, the autoclave was taken out, cooled with ice water, and the pressure was slowly released. The sample was taken out for purification, dried, and the grafting ratio of polar polypropylene was calculated to be 11.8%.

Embodiment example 2

[0019] Get 100g melt flow rate and be the homopolypropylene of 5g / 10min, initiator is AIBN, and quality is 6g, and grafting monomer selects AA, MAH, BMA and St, and quality is respectively 10g, 8g, 6g and 2g, places In the autoclave, put it into a constant temperature oil bath with a preset temperature, first fill it with propylene to replace the air in the autoclave, and then use a high-pressure pump to inject propylene to the specified pressure. The reaction temperature is controlled at 112° C., the reaction pressure is 4.6 MPa, and the reaction time is 4.7 h. After the reaction, the autoclave was taken out, cooled with ice water, and the pressure was slowly released. The sample was taken out for purification, dried, and the grafting ratio of polar polypropylene was calculated to be 12.4%.

Embodiment example 3

[0021] Get 100g melt flow rate and be the homopolypropylene of 10g / 10min, initiator is BPO, and quality is 7g, and grafting monomer selects MAA, St, EA and PETA, and quality is respectively 7g, 12g, 5g and 4g, places In the autoclave, put it into a constant temperature oil bath with a preset temperature, first fill it with propylene to replace the air in the autoclave, and then use a high-pressure pump to inject propylene to the specified pressure. The reaction temperature is controlled at 120° C., the reaction pressure is 4.8 MPa, and the reaction time is 5.1 h. After the reaction, the autoclave was taken out, cooled with ice water, and the pressure was slowly released. The sample was taken out for purification, dried, and the grafting ratio of polar polypropylene was calculated to be 12.9%.

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Abstract

The invention discloses polar polypropylene prepared through grafting modification, with supercritical propylene as a swelling agent. A preparation method for the polar polypropylene comprises the following steps: adding polypropylene, an initiator and grafting monomers into a reaction vessel; introducing propylene; carrying out heating and pressurization until propylene is in a supercritical state; and carrying out a reaction so as to obtain a polar polypropylene product. The polar polypropylene product prepared by using the method has a high grafting rate, and when the polar polypropylene product is used as a compatilizer, the addition amount of the product is small.

Description

technical field [0001] The invention relates to a polar polypropylene prepared by solid-phase graft modification, in particular to a polar polypropylene prepared by using supercritical propylene as a swelling agent. Background technique [0002] Due to its excellent hydrophilicity, dyeability, antistatic properties, cohesiveness and printing properties, polar polypropylene is used as a compatibilizer to blend with polypropylene, and is widely used in packaging, automobiles, advertising and other fields. The method for preparing polar polypropylene is to introduce polar groups into the polypropylene skeleton, among which graft modification with monomers containing polar groups is the simplest and easy to do, and has attracted widespread attention. The degree of grafting of polar polypropylene directly determines the amount of its addition as a compatibilizer. Therefore, the technical problem to be solved by the present invention is to prepare polar polypropylene with a high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F255/04
CPCY02P20/54
Inventor 高宇新王文燕葛腾杰王斯晗邹恩广姜进宪于占元吕红丽王华方宏韦德帅张明强李岩李波王世华任鹤付强李传明张占宾于波张瑞姜丽丽李志勇
Owner PETROCHINA CO LTD