Polypropylene composition with excellent anti-impulsion, bend modulus and transparence and its product

A polypropylene composition and impact resistance technology, used in the field of products, can solve the problems of limited methods for particle size and refractive index differences

Active Publication Date: 2006-11-15
SK INNOVATION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method proposed by this published patent to control the particle size and refractive index difference is very limited

Method used

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  • Polypropylene composition with excellent anti-impulsion, bend modulus and transparence and its product
  • Polypropylene composition with excellent anti-impulsion, bend modulus and transparence and its product
  • Polypropylene composition with excellent anti-impulsion, bend modulus and transparence and its product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Ethylene, propylene, triethylaluminum, highly active Ziegler-Natta catalyst and silane electron donor are mixed in a reactor, and the slurry is kept at a reaction temperature of 60-80°C and a pressure of 30-35 atmospheres Bulk polymerization was carried out at 0°C to obtain an ethylene-propylene random copolymer (component a) with a propylene content of 96.7% by weight and an ethylene content of 3.3% by weight. The melt index of random copolymers is controlled by the amount of hydrogen.

[0034] After the polymerization of the ethylene-propylene random copolymer was completed, unreacted propylene was removed, and the pressure in the reactor was reduced to normal pressure. Then, introduce ethylene and propylene as monomers, and hydrogen as a melt index control agent into the reactor, keep the reaction temperature at 70-80° C., and the pressure at 10-15 atmospheres, and carry out continuous polymerization in a gaseous state. An ethylene-propylene elastomeric copolymer (com...

Embodiment 2-5 and 7-10 and comparative example 1-5

[0038] The polypropylene composition was prepared according to the method of Example 1, except that the components and contents were changed as shown in Table 1 and Table 2.

Embodiment 6

[0040] The polypropylene composition was prepared according to the method of Example 1, except that, as shown in Table 1 below, component (a) was prepared using propylene and 1-butene as monomers.

[0041] As can be seen from Table 1 below, by controlling the melt index ratio of component (b) and component (a), the prepared polypropylene composition is excellent not only in transparency but also in impact resistance and flexural modulus performance.

[0042] From Figure 1 to Figure 3 It can also be seen that, compared with Comparative Example 2 ( image 3 ) and Comparative Example 3 ( figure 2 ) compared to that in Example 2 ( figure 1 ), the ethylene-propylene elastomeric copolymer (component b) was dispersed with a smaller particle size, indicating a significant increase in transparency. That is, in the composition of the present invention, the melt index ratio of component (b) and component (a) is controlled, so that the particle diameter of component (b) is preferabl...

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Abstract

The present invention relates to a polypropylene composition having excellent impact resistance, flexural modulus and transparency, and articles made therefrom. More particularly, it relates to a polypropylene composition having excellent impact resistance, flexural modulus, and transparency, which comprises: (a) 80-95 wt% of at least one highly crystalline random copolymer selected from an ethylene-propylene random copolymer containing 1-5 wt% ethylene and a propylene-butene-1 random copolymer containing 2-12 wt% butene-1; and (b) 5-20 wt% of an ethylene-propylene elastomeric copolymer containing 30-50 wt% ethylene, in which the ratio of the melt index of the component (b) to that of the component (a) is 1.5-35, as well as articles made therefrom. The inventive polypropylene composition is excellent not only with respect to impact resistance and flexural modulus, but also with respect to transparency, and is thus suitable for the production of refrigerating containers, freezing containers, food packaging containers, extrusion-molded articles, blow molded articles, films, sheets, bottle stoppers, etc.

Description

technical field [0001] The present invention relates to a polypropylene composition with excellent impact resistance, flexural modulus and transparency and its products, more specifically a polypropylene composition with excellent impact resistance, flexural modulus and transparency and Its products, wherein, by controlling the melt index ratio of ethylene-propylene elastic copolymer and ethylene-propylene random copolymer or propylene-1-butene random copolymer, and controlling the ratio of ethylene / propylene in ethylene-propylene elastic copolymer The molar ratio enables the ethylene-propylene elastic copolymer to be highly dispersed with a particle size of less than 1 micron. Background technique [0002] Propylene-ethylene block copolymers are widely used in injection molded products due to their excellent impact resistance, such as auto parts, household appliances, industrial parts, daily necessities, packaging containers, packaging films and sheets, etc. Molded article...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08J5/00C08L23/14
CPCC08J5/00C08J5/18C08L23/16C08L2201/00C08L2201/10C08L2203/10C08L2203/16C08L2205/02C08L2314/02
Inventor 蔡圣锡韩承烈李台根禹泰羽
Owner SK INNOVATION CO LTD
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