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Polypropylene with high melt index, preparation method thereof and melt-blown fiber cloth

A technology with high melt index and production method, applied in the direction of single-component polypropylene rayon, separation method, fiber treatment, etc., can solve the problems affecting the application field, heavy peroxide odor, narrow molecular weight distribution of polypropylene, etc. Achieve the effects of improving applicability, wide processing window, and improving melt index

Pending Publication Date: 2021-06-18
FORMOSA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the odor of residual peroxide in polypropylene is heavy, which affects its application fields
In addition, the molecular weight distribution of degraded polypropylene is narrow, and it is difficult to meet the application requirements

Method used

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  • Polypropylene with high melt index, preparation method thereof and melt-blown fiber cloth

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Embodiment Construction

[0019] The making and using of embodiments of the invention are discussed in detail below. It should be appreciated, however, that the embodiments provide many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are illustrative only, and do not limit the scope of the invention.

[0020] The polypropylene of the present invention is prepared by the Ziegler-Natta catalyst system, and a specific electron donor is selected to carry out the polymerization process of propylene monomer, so as to solve the defect of the existing Ziegler-Natta catalyst due to hydrogen deactivation, so the present invention The prepared polypropylene has high melt index, high isotactic index, and controllable melting point and molecular weight distribution. Since the obtained polypropylene has a higher melt index, it can be used to produce polypropylene fibers with smaller silk diameters by using the melt-blown process, and then...

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Abstract

The invention relates to polypropylene with a high melt index, a preparation method thereof and melt-blown fiber cloth. The preparation method of the polypropylene comprises the following steps: providing a reaction mixture, and carrying out a polymerization process on the reaction mixture in a heterogeneous reaction system to prepare the polypropylene, wherein the reaction mixture comprises a propylene monomer, a Ziegler-Natta catalyst, an organic aluminum compound and an electron donor. The prepared polypropylene has high melt index and controllable melting point and molecular weight distribution, and can be used for manufacturing melt-blown fiber cloth.

Description

technical field [0001] The present invention relates to a method for producing polypropylene, in particular to provide a method for producing polypropylene with a high melt index. Background technique [0002] Polypropylene is a common polymer material. It has good thermoplastic properties and good mechanical properties, so it is often used to make various products. Among them, polypropylene can also be made into a melt-blown fiber cloth by a melt-blown process, and used as a filter material. However, the existing polypropylene has a low melt index, which makes it difficult to meet the application requirements. [0003] In order to effectively increase the melt index of polypropylene, the general practice is to add hydrogen during the reaction process, but the added hydrogen is easy to deactivate the catalyst, and it cannot be reacted to produce polypropylene. Another method is to degrade the polymerization product by peroxide to increase the melt index. However, the resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/646D01F6/06D04H1/56D04H1/544
CPCC08F110/06D01F6/06D04H1/56D04H1/544C08F4/6465C08F2500/04C08F2500/12C08F2500/15B01D39/1623B01D2239/10B01D2239/1233B01D2239/0622C08F4/6492C08F4/651C08F4/022C08F10/06D01D5/0985D10B2321/022
Inventor 陈光明谢坤沛高荣鸿张朝顺陈兴群
Owner FORMOSA PLASTICS CORP
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