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Propylene resin composition with melt flowability and impact resistance

A technology of polypropylene resin and composition, which is applied in the field of polypropylene resin molded products, can solve problems such as not satisfying NB characteristics, and achieve excellent melt fluidity and impact resistance

Pending Publication Date: 2022-04-15
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the melt index of the RTPO resin is higher than this value, the Izod impact strength at room temperature is lower than 50kgf·cm / cm, so that the NB characteristics cannot be satisfied

Method used

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  • Propylene resin composition with melt flowability and impact resistance
  • Propylene resin composition with melt flowability and impact resistance
  • Propylene resin composition with melt flowability and impact resistance

Examples

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preparation example Construction

[0033] In a specific embodiment of the present invention, the ethylene-propylene block copolymer can be prepared by a production method comprising the steps of: a first polymerization step of polymerizing a propylene homopolymer in two or more continuous reactors; and The ethylene-propylene rubber copolymer component is copolymerized by adding ethylene and propylene in the presence of polymerized propylene homopolymer to obtain a second polymerization step of ethylene-propylene block copolymer resin.

[0034] At this time, each polymerization can use methods and reaction conditions known in the technical field of the present invention, such as slurry polymerization method, bulk polymerization method, solution polymerization method, gas phase polymerization method and the like.

[0035] In a specific embodiment of the present invention, each of the above polymerization steps can be carried out in the presence of a Ziegler-Natta catalyst or a metallocene catalyst. In order to maxi...

Embodiment

[0062] Hereinafter, the present invention will be described in more detail through examples and comparative examples. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

[0063] Preparation of polypropylene resin composition

[0064] In magnesium chloride (MgCl 2 ) Carriers loaded with titanium chloride (TiCl 4 ), and then add dicyclopentyldimethoxysilane as an exogenous electron donor and cocatalyst triethylaluminum for activating the catalyst, thereby obtaining a Ziegler-Natta catalyst.

[0065] The ethylene-propylene block copolymer was polymerized using Mitsui's Hypol process, which can connect 2 slurry reactors and 2 gas phase reactors in series for continuous polymerization. The operating temperature and pressure of the first to third stage reactors are 60 to 80°C and 15 to 40 bar, respectively. The operating temperature and pressure of the fourth stage reactor are 67 to 72 ...

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Abstract

The present invention relates to a polypropylene resin composition and a molded article molded therefrom. The polypropylene resin composition according to a specific embodiment of the present invention has excellent melt flowability and impact resistance. Therefore, the polypropylene resin molded article according to the specific embodiment of the present invention can be effectively applied to interior and exterior parts of automobiles, parts of household appliances or electronic products, materials for buildings or industries, and the like.

Description

technical field [0001] The present invention relates to a polypropylene resin composition and molded articles made thereof. More specifically, the present invention relates to a polypropylene resin composition having excellent melt fluidity and impact resistance, and a polypropylene resin molded article molded from the polypropylene resin composition and excellent in impact resistance. Background technique [0002] Polypropylene resin is a general-purpose resin that is widely used as films, tubes, automotive interior and exterior parts, components of electrical and home appliances, construction and industrial materials. [0003] Among them, propylene-ethylene block copolymer resins are used in various applications by injection, extrusion, etc. due to their advantages of rigidity, chemical resistance, excellent molding processability, and low cost. In particular, propylene-ethylene block copolymers and composite resin compositions using propylene-ethylene block copolymers a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L23/08C08K3/34
CPCC08L23/12C08L2207/02C08L23/16C08F110/06C08F297/083
Inventor 朴大镐全龙成程惠暎金成贤
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD