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Polypropylene composition and preparation method thereof

A technology of polypropylene composition and polypropylene resin, which is applied in the field of polypropylene composition and its preparation, can solve the problems of not being able to significantly improve the barrier performance of polypropylene and cannot meet the requirements, and achieve good barrier performance, easy operation, and easy control of conditions Effect

Active Publication Date: 2015-04-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, petroleum resin cannot fundamentally improve the lattice defects in the amorphous region of polypropylene molecules, and the addition of petroleum resin alone cannot significantly improve the barrier properties of polypropylene, thus failing to meet the requirements of practical use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0028] Polypropylene (Shanghai Petrochemical, brand F280S, melt index 2.9g / 10min), polypropylene β nucleating agent (Shanxi Chemical Industry Research Institute, brand TMB-5, replacing aramid nucleating agent), hydrogenated C 5 Petroleum resin (Lanzhou Petrochemical, LH100-1), erucamide (Akesu, Netherlands, ARMOSLIP EPOWDER), antioxidant (Swiss Ciba Fine Chemical Company, B225) after stirring evenly (see Table 1 for the specific formula, the content of each component is equal In parts by weight), a twin-screw extruder is used for melt-blending extrusion and pelletizing, the extrusion temperature is 190-230°C, and the screw speed is 300 rpm. The particles obtained by the extruder were dried at 90°C for 6 hours, and then a film sample was prepared by compression molding at 190°C to test the oxygen permeability performance. The results are shown in Table 1.

Embodiment 5～8

[0030] Polypropylene (Zhonglan Tianjin Chemical Factory, brand 4# powder, melt index 5.14g / 10min), polypropylene β nucleating agent (Guangdong Weilinna Functional Materials Co., Ltd., brand WBG-II, rare earth nucleating agent ), dicyclopentadiene petroleum resin (D5100, Sino-German petroleum resin), erucamide (Akezo, Netherlands, ARMOSLIP E POWDER), antioxidant (Swiss Ciba Fine Chemical Company, B225) after stirring evenly (see the specific formula Table 1, the content of each component is in parts by weight), using a twin-screw extruder for melt blending and extruding and pelletizing, and the remaining steps and conditions are the same as those in the foregoing Examples 1 to 5. The performance results are shown in Table 1.

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PUM

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Abstract

The invention provides a polypropylene composition, comprising the following components in part by weight: 100 parts of polypropylene resin, 0.1-1.5 parts of petroleum resin and / or resin obtained by polymerization of alpha-methyl styrene, indenyl alkene, and terpene and 0.01-1 part of beta nucleating agent. In the polypropylene composition, the blocking property for oxygen is good; in the preparation method, the process is simple, the condition is easy to control, and the applicability is strong; and the invention can be used for the packaging fields such as medicines, foods and other aspects with requirements for blocking and sanitation and the like.

Description

Technical field [0001] The invention relates to a polypropylene composition and a preparation method thereof. Specifically, it relates to a polypropylene composition with good oxygen barrier properties and a preparation method thereof. technical background [0002] Polypropylene is a general-purpose plastic with good comprehensive properties, and it is widely used in many fields. The outstanding advantage of using polypropylene as a barrier packaging material is its excellent water vapor barrier properties. Some common oxygen and carbon dioxide barrier materials, such as ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate (PET), etc., have a rapid decline in barrier performance in the presence of water vapor. In addition, polypropylene (PP) has good hygienic properties, is easy to recycle, is environmentally friendly, and meets current environmental protection requirements. However, currently commonly used high-barrier materials such as polyvinyl chloride (PVC)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L57/02C08L25/16C08L45/00C08K5/098C08K5/092C08K5/20
Inventor 元文芳金滟丁树岩蔡涛刘善元石胜鹏张静
Owner CHINA PETROLEUM & CHEM CORP