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A kind of high β crystal polypropene material and preparation method thereof

A technology of polypropylene material and β crystal form, which is applied in the field of high β crystal form polypropylene material and its preparation, can solve problems such as cracks, material damage, difficulty in obtaining, etc., achieve excellent mechanical properties, improve application fields, and increase crystallinity Effect

Active Publication Date: 2022-03-18
合肥科拜尔新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is usually difficult to obtain polypropylene crystals of β-crystal form. The common method at present is to add β-nucleating agent. The crystallinity of β-crystal form of modified polypropylene obtained when the addition ratio of common β-nucleating agent is 0.2% is about 45%. , but the existence of defects in the uncrystallized region makes the material easy to generate cracks in the region when the force is applied, which diffuses and causes the material to be damaged

Method used

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  • A kind of high β crystal polypropene material and preparation method thereof
  • A kind of high β crystal polypropene material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The preparation method of high β crystal polypropylene material:

[0024] (1) Accurately weigh 98.47kg of homopolypropylene, 0.03kg of N,N′-dicyclohexyl-1,5-diamino-2,6-naphthalene dicarboxamide, (3-aminopropyl)dimethyl Ethoxysilane 0.5kg, hindered phenolic antioxidant 10100.4kg, metal soap 0.6kg;

[0025] (2) Add polypropylene, β-type nucleating agent, (3-aminopropyl) dimethylethoxysilane, heat stabilizer, and processing aid to the high-mixer at 400-1000r / min, 23°C Down, stir 8min to obtain mixture;

[0026] (3) Put the mixture obtained in step (2) into a twin-screw extruder with an aspect ratio of 38:1 to melt, mix and disperse, extrude and granulate to obtain a high-β crystal polypropylene material.

Embodiment 2

[0028] The preparation method of high β crystal polypropylene material:

[0029] (1) Accurately weigh 98.46 kg of homopolypropylene, 0.04 kg of 2,6-phthalic acid cyclohexylamide, 0.8 kg of (3-aminopropyl) dimethylethoxysilane, and 10760.1 kg of hindered phenolic antioxidant kg, phosphite antioxidant Irgafos 1680.1kg, thioester antioxidant DSTDP 0.1kg, amide lubricant erucamide 0.4kg;

[0030] (2) Add polypropylene, β-type nucleating agent, (3-aminopropyl) dimethylethoxysilane, heat stabilizer, and processing aids into the high mixer at 400-1000r / min, 40°C Down, stir 7min to obtain mixture;

[0031] (3) Put the mixture obtained in step (2) into a twin-screw extruder with an aspect ratio of 38:1 to melt, mix and disperse, extrude and granulate to obtain a high-β crystal polypropylene material.

Embodiment 3

[0033] The preparation method of high β crystal polypropylene material:

[0034] (1) Accurately weigh 98.07kg of polypropylene copolymer, 50.03kg of TMB-50.03kg, 0.6kg of (3-aminopropyl) dimethylethoxysilane, 3300.2kg of hindered phenolic antioxidant, and phosphite antioxidant Irgafos P-EPQ 0.3kg, metal soap lubricant calcium stearate 0.8kg;

[0035] (2) Add polypropylene, β-type nucleating agent, (3-aminopropyl) dimethylethoxysilane, heat stabilizer, and processing aid to the high-mixer at 400-1000r / min, 35°C Down, stir 6min to obtain mixture;

[0036] (3) Put the mixture obtained in step (2) into a twin-screw extruder with an aspect ratio of 42:1 to melt, mix and disperse, extrude and granulate to obtain a high-β crystal polypropylene material.

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Abstract

The invention discloses a polypropylene material with high β crystal form, which adopts 95.8-98.9 parts of polypropylene, 0.2-0.6 parts of β-type nucleating agent, and 0.5-2 parts of (3-aminopropyl) dimethylethoxysilane , 0.2-0.6 parts of heat stabilizer, 0.2-1 part of processing aid are mixed by high mixer and twin-screw extruder extrusion granulation; the preparation method of the present invention is simple and effective, and the crystallinity of the polypropylene material obtained Higher, the relative content of the β crystal form can be increased from 45% of ordinary modification to more than 98%, and the prepared high β crystal form polypropylene material has more excellent mechanical properties, thermal properties and gloss, so that the product of the present invention has Excellent prospects for industrialization.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a high β crystal polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene is widely used in many fields due to its excellent thermal and mechanical properties. This versatility and economy make the application of polypropylene materials develop rapidly at present and become one of the most important thermoplastic products in this field. one. Polypropylene crystals mainly have four different spherulite structures: α, β, γ, and δ. Among them, β-PP spherulites are uniform, fine and dense, and have a unique bundle-like aggregation structure, which can cause a large number of silver crazes when the material is impacted. Therefore, a large amount of impact energy can be absorbed, and due to the mutual interference of the stress field of the silver-grained parts, it can prevent it from further developing into cracks, and improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08K5/20C08K5/134C08K9/06C08K9/10C08K5/098C08K13/06
CPCC08K5/20C08K5/1345C08K9/06C08K9/10C08K5/098C08K13/06C08L2205/242C08L23/12C08L23/14
Inventor 姜之涛徐卫兵李牛柱
Owner 合肥科拜尔新材料股份有限公司
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