High-melt-strength polypropylene material, and preparation method and application thereof

A polypropylene material with high melt strength technology, applied in the field of modified polypropylene, can solve the problems of affecting monomer grafting efficiency, limited reaction time in reaction extrusion process, and reduced number of graftable polypropylene free radicals, etc. Achieve the effects of easy industrial production, easy operation and easy control

Inactive Publication Date: 2012-07-11
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this will reduce the number of graftable polypropylene free radicals in the reaction system, and the reaction time of the reaction extrusion process is limited, and the reduction in the number of free radicals will directly affect the grafting efficiency of monomers.

Method used

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  • High-melt-strength polypropylene material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A high-melt-strength polypropylene material prepared from the following components in parts by weight:

[0054] Polypropylene (MFR=3.2g / 10min): 99.79

[0055] Dicumyl peroxide: 0.01

[0056] Lanthanum oxide: 0.05

[0057] Lanthanum stearate 0.05

[0058] Pentaerythritol triacrylate: 0.1;

[0059] Mix polypropylene, free radical stabilizer and inert processing aids uniformly and feed them into twin-screw extruder with L / D=54, D=35; initiator and multifunctional monomer are added to the mixture melt by liquid feeding device Medium; Melt extrusion and granulation at 150rpm and 10kg / h feed rate to obtain polypropylene material with high melt strength; extruder temperature settings: 170°C in the conveying section, 200°C in the reaction section, and 220°C in the extrusion section ℃. The resulting polypropylene material had a melt strength of 12 cN and a melt index of 3.5 g / 10 min.

Embodiment 2

[0061] A high-melt-strength polypropylene material prepared from the following components in parts by weight:

[0062] Polypropylene (MFR=3.2g / 10min): 97.7

[0063] Dicumyl peroxide: 0.1

[0064] Lanthanum oxide: 0.1

[0065] Lanthanum stearate: 0.1

[0066] Pentaerythritol triacrylate: 2;

[0067] The preparation method of the high-melt-strength polypropylene material is the same as in Example 1. The melt strength of the obtained polypropylene material is 20cN, and the melt index is 2.2g / 10min.

Embodiment 3

[0069] A high-melt-strength polypropylene material prepared from the following components in parts by weight:

[0070] Polypropylene (MFR=3.2g / 10min): 92.7

[0071] Dicumyl peroxide: 0.1

[0072] Lanthanum oxide: 0.1

[0073] Lanthanum stearate: 0.1

[0074] Pentaerythritol triacrylate: 2

[0075] Talc powder: 5;

[0076] The preparation method of the high-melt-strength polypropylene material is the same as in Example 1. The melt strength of the obtained polypropylene material is 21cN, and the melt index is 2.0g / 10min.

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Abstract

The invention discloses a high-melt-strength polypropylene material, and a preparation method and application thereof. The polypropylene material is prepared from 65-99.79 parts of polypropylene, 0.01-10 parts of initiator, 0.1-10 parts of polyfunctional group monomer, 0.1-5 parts of free radical stabilizer and 0-10 parts of inert processing assistant, wherein the free radical stabilizer is a lanthanide rare-earth oxide, carboxylate of lanthanide rare-earth element, naphthenate complex of lanthanide rare-earth element or dithiocarbamic acid rare-earth compound. The lanthanide rare-earth element does not include promethium. The proportion of the polypropylene, initiator and polyfunctional group monomer is controlled, the grafting reaction time is prolonged, and the rare-earth substances are utilized to inhibit the degradation of the polypropylene and prolong the service life of the free radical, thereby obtaining long-branched-chain high-melt-strength polypropylene with stable performance and enhancing the service performance of the conventional polypropylene. The method disclosed by the invention is easy to operate and convenient to control, and can easily implement industrial production.

Description

technical field [0001] The invention belongs to the technical field of modified polypropylene, and specifically relates to a high-melt-strength polypropylene material with a long-chain branched structure prepared by a reaction extrusion method from linear polypropylene, and a preparation method and application thereof. Background technique [0002] Foam plastic has the advantages of light weight, heat insulation, cushioning, insulation, anti-corrosion, and low price, so it is widely used in daily necessities, packaging, industry, agriculture, transportation, military industry, aerospace industry and other fields. [0003] Compared with polystyrene foam and polyethylene foam, polypropylene foam has many unique advantages: such as excellent heat resistance, good low temperature characteristics, dimensional shape recovery stability, remarkable heat insulation, etc. However, foaming of polypropylene is very difficult. The main reason is that polypropylene is a crystalline polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08K3/22C08K5/098C08K5/39B29B9/06C08L51/06
CPCC08K5/098C08K3/22C08F255/02C08K5/39C08L51/06C08F210/06B29B9/06C08L2023/40C08F220/20C08F2500/11C08F2500/12
Inventor 于海鸥杨霄云王爱东陶四平肖鹏夏建盟宁凯军
Owner KINGFA SCI & TECH CO LTD
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