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Polypropylene resin composition having excellent whitening resistance and impact resistance

A technology of polypropylene resin and composition, which is applied in the field of polypropylene resin composition with excellent whitening resistance and impact resistance, can solve the problems of poor shrinkage, lower processing performance, high cost of manufacturing, etc., and achieve excellent results, durability Excellent effect of whitening and impact resistance

Inactive Publication Date: 2016-07-13
HANWHA TOTAL PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of such an impact modifier leads to a sharp decrease in rigidity as the content of the modifier increases, and rubber-elastomers in particular have the disadvantage of being expensive and increasing the cost of production.
In addition, rubber-elastomer, which is more effective in improving impact resistance, has a high viscosity, and the more polypropylene is added, the processability at the time of injection molding decreases, and excessive shrinkage occurs due to the composition and the modified material. The problem of whitening caused by the difference
[0004] Although U.S. Patent No. 5,258,464, U.S. Patent No. 4,734,459 and JP52072-744-6 / 77 propose adding styrene-ethylene-butylene-styrene block copolymer (SEBS) rubber, or carrying out high-density polyethylene However, problems such as reduction in rigidity and heat resistance cannot be solved.

Method used

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  • Polypropylene resin composition having excellent whitening resistance and impact resistance
  • Polypropylene resin composition having excellent whitening resistance and impact resistance
  • Polypropylene resin composition having excellent whitening resistance and impact resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (a) First polymerization stage

[0054] In the presence of a catalyst produced by reacting a titanium compound with a phthalate-based internal donor on a dialkoxymagnesium carrier, ethylene, propylene, and 1-butene are simultaneously injected to perform bulk polymerization, and The ethylene-propylene-butene random copolymer was produced by copolymerizing so that ethylene contained 2 weight% and 1-butene contained 6 weight% in the produced copolymer.

[0055] (b) Second polymerization stage

[0056] In the presence of the ethylene-propylene-butene random copolymer produced through the first polymerization stage, additional ethylene and propylene are added so that the ethylene content of the ethylene-propylene block copolymer becomes the weight percent 32% was produced, and the amount of polymerization was adjusted so that the ethylene-propylene-butene random copolymer became 88% by weight, the ethylene-propylene block copolymer became 12% by weight, and the intrinsic vi...

Embodiment 2 to 7

[0060] Implement in the same manner as described Example 1, and the content of each component is shown in the following table 1 (however, the MI auxiliary agent uses PK010 (POLYMODIFIER), and the melting process before adding the MI auxiliary agent is 4 ~ 5g / min).

[0061] 【Table 1】

[0062]

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Abstract

A polypropylene resin composition having excellent whitening resistance and impact resistance according to the present invention contains 75-95 wt% of an ethylene-propylene-alpha olefin random copolymer and 5-25 wt% of an ethylene-propylene block copolymer having an ethylene content of 20-50 wt%, wherein the intrinsic viscosity ratio of the ethylene-propylene-alpha olefin random copolymer to the ethylene-propylene block copolymer is 0.3-1. The polypropylene resin composition is highly effective in whitening resistance and impact resistance.

Description

technical field [0001] The polypropylene resin composition excellent in whitening resistance and impact resistance according to the present invention is characterized in that it contains 75 to 95% by weight of ethylene-propylene-α-olefin random copolymer, and 5 to 25% by weight A polypropylene random block copolymer composed of an ethylene-propylene block copolymer, wherein the ethylene content of the ethylene-propylene block copolymer is 20 to 50% by weight, and the polypropylene resin combination Among the products, the ethylene-propylene-α-olefin random copolymer has an intrinsic viscosity ratio of 0.3 to 1 relative to the ethylene-propylene block copolymer, and exhibits excellent effects in whitening resistance and impact resistance. Background technique [0002] In general, polypropylene resin compositions are light and have excellent mechanical and physical properties relative to the price, and are widely used as materials for injection molded products. Recently, alth...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08F210/06C08F297/08C08J5/00
CPCC08F210/06C08J5/18C08J2323/12C08J2323/16C08L23/14C08L53/00C08F297/08C08F2500/12C08J5/00C08K3/013C08K3/22C08K2003/2237C08L23/16C08L2666/78
Inventor S·R·郑金昌熙全龙成
Owner HANWHA TOTAL PETROCHEMICAL CO LTD
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