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Propylene polymer, preparation method and application thereof

A technology of propylene polymer and propylene, which is applied in the field of propylene polymer and its preparation, can solve the problems of high heat-sealing temperature, lower packaging quality, and affect the appearance of packaging, and achieve good film-forming properties and low initial heat-sealing temperature , good thermal adhesion resistance effect

Active Publication Date: 2015-01-14
北京燕山石化高科技术有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although propylene polymers have a lower heat-sealing temperature compared to polypropylene, films made from existing propylene polymers still have a higher onset heat-sealing temperature (typically above 115°C)
Moreover, the thermal blocking resistance of the film prepared by the existing propylene polymer needs to be further improved. When curing, the films are easy to stick together, which will adversely affect the subsequent processing and affect the quality of the package. Appearance, reduced packaging quality

Method used

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  • Propylene polymer, preparation method and application thereof
  • Propylene polymer, preparation method and application thereof
  • Propylene polymer, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0097] This example is used to illustrate the propylene polymer according to the present invention and its preparation method and application.

[0098] (1) Preparation of propylene polymer

[0099] Adopt commercially available catalyst solid components from Beijing Aoda Petrochemical Co., Ltd., and sieve the catalyst solid components before use, so that the particle size of the catalyst solid components is 10-50 microns, and the particle size is 14-30 The amount of solid components within the range of microns is 87% by volume; as figure 1 As shown, the particle size distribution curve of the collected solid components is a unimodal distribution.

[0100] Based on the total amount of the solid components, the content of titanium in the solid components is 2.5% by weight, and the content of di-n-butyl terephthalate is 9% by weight.

[0101] Continuously feed the catalyst solid component at 0.61g / h for 50m 3 In the continuous horizontal stirred bed gas-phase reactor, add triethy...

Embodiment 2

[0114] This example is used to illustrate the propylene polymer according to the present invention and its preparation method and application.

[0115] The same method as in Example 1 was used to prepare propylene polymer and polymer film, except that in step (1), the amount of solid components with a particle size in the range of 14-30 μm was 90% by volume.

[0116] During the polymerization process, there was no phenomenon that the polymer particles blocked the material discharge pipe of the reactor. The composition and properties of the propylene polymers prepared are shown in Table 1. The onset heat-sealing temperature and thermal blocking resistance of the prepared polymer films are shown in Table 1.

Embodiment 3

[0118] This example is used to illustrate the propylene polymer according to the present invention and its preparation method and application.

[0119] The same method as in Example 1 was used to prepare a propylene polymer, except that in step (1), the amount of solid components with a particle size in the range of 14-30 microns was 100% by volume.

[0120] During the polymerization process, there was no phenomenon that the polymer particles blocked the material discharge pipe of the reactor. The composition and properties of the propylene polymers prepared are shown in Table 1. The onset heat-sealing temperature and thermal blocking resistance of the prepared polymer films are shown in Table 1.

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Abstract

The invention provides a propylene polymer, and a preparation method and an application thereof. The propylene polymer comprises 80-95wt% of a propylene constitutional unit, 1-10wt% of an ethylene constitutional unit and 1-19wt% of an alpha-olefin constitutional unit; the xylene soluble substance content of the propylene polymer is 1-20wt%, and the xylene insoluble substance content of the propylene polymer is 80-99wt%; the crystallization temperature and the melting temperature of the xylene soluble substance are 40-65DEG C and 80-97DEG C respectively; and the crystallization temperature and the melting temperature of the xylene insoluble substance are 85-105DEG C and 125-135DEG C respectively. The propylene polymer has a good film forming ability, so a polymer film formed through using the propylene polymer has a low initial heat sealing temperature and a good heat adhesion resistance. The propylene polymer is suitable for preparing polymer films, and the polymer films are especially suitable for heat sealing films or multilayer films as the heat sealing layers.

Description

technical field [0001] The present invention relates to a propylene polymer and its preparation method and application. Background technique [0002] Polypropylene film has the characteristics of low relative density, high mechanical strength, good transparency, high gloss, good stiffness, good moisture resistance, excellent heat resistance and easy heat sealing. It is widely used, especially suitable for clothing, food and Packaging of various daily necessities. Therefore, polypropylene film has an important position in the field of plastic product packaging materials. [0003] Since polypropylene is a semi-crystalline polymer, it not only has high hardness, but also has a high melting point. In order to lower the melting point of polypropylene, propylene is usually copolymerized with ethylene and α-olefins other than propylene (such as 1-butene), thereby introducing ethylene structural units and α-olefin structural units into the macromolecular chain of polypropylene , ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/16C08F2/34C08F4/646
Inventor 华炜马良兴赵丽梅赵唤群谷汉进佟中军陈青葵于建明耿存李卫华李国李昕
Owner 北京燕山石化高科技术有限责任公司
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