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Metallocene tribasic ethylene propylene rubber-polyethylene crosslinking substance in low density, preparation method and application

A technology of EPDM and low-density polyethylene, which is applied in the field of metallocene EPDM-low-density polyethylene cross-linked product and its preparation to achieve lower production costs, high rigidity and high toughness, and compatibility. Sex-enhancing effects

Inactive Publication Date: 2007-07-11
洛阳石化吉润化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cross-linkable foamable metallocene EPDM composition introduced by CN1045801A and CN1045802A has good elasticity and softness similar to sponge, and can be used for producing toys etc., but its relevant technical index has only emphasized the elasticity of the composition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 2

[0024] Most of it is the same as Example 1, except that the organic peroxide initiator is double "2,5" vulcanizing agent. The metallocene EPDM rubber-low density polyethylene cross-linked product has a cross-linking degree of 68.3%.

[0025] 75g of the cross-linked product was added with 770g of homopolymerized polypropylene of type B200, 150g of copolymerized polypropylene of type K8303, 10102g of antioxidant, and 1683g of antioxidant to obtain a high-rigidity and high-toughness polypropylene blend. Strength: 30.2MPa; Elongation at Break: 312%; Flexural Strength: 32.1MPa; Flexural Modulus: 1507MPa; Notched Impact Strength at IZOD23℃: 601.4J / m; Notched Impact Strength at IZOD-20℃: 82.3J / m .

specific Embodiment approach 3

[0026]Most of them are the same as in Example 1, except that 1942g of metallocene EPDM rubber with model NORDEL IP3720P and Mooney viscosity ML(1+4) at 125°C of 20; low-density polyethylene produced by high-pressure gas phase method (density is 0.923g / cm 3 , melt index MI is 3.2g / 10min) 1043g; organic peroxide initiator double "2,5" vulcanizing agent, 15g; screw speed 150 rpm, feeder speed 20 rpm. The metallocene EPDM rubber-low density polyethylene cross-linked product has a cross-linking degree of 69.8%.

[0027] 75g of the cross-linked product was added with 770g of homopolymerized polypropylene of type B200, 150g of copolymerized polypropylene of type K8303, 10102g of antioxidant, and 1683g of antioxidant to obtain a high-rigidity and high-toughness polypropylene blend. Strength: 32.3MPa; Elongation at Break: 308%; Flexural Strength: 33.8MPa; Flexural Modulus: 1570MPa; Notched Impact Strength at IZOD23℃: 652.7J / m; Notched Impact Strength at IZOD-20℃: 85.4J / m .

specific Embodiment approach 4

[0028] Most of them are the same as in Example 1, except that 1650g of metallocene EPDM rubber with model NORDEL IP4770R and Mooney viscosity ML(1+4) at 125°C of 70 is used; Density polyethylene (density is 0.923g / cm 3 , melt index MI is 1.8g / 10min) 1035g; organic peroxide initiator is double "2, 5" vulcanizing agent 15g, inorganic rigid particles are barium sulfate 300g, particle size is 3500 mesh. The cross-linking degree of the metallocene EPDM rubber-low density polyethylene cross-linked product is 71.2%.

[0029] 75g of the cross-linked product was added with 770g of homopolymerized polypropylene of type B200, 150g of copolymerized polypropylene of type K8303, 10102g of antioxidant, and 1683g of antioxidant to obtain a high-rigidity and high-toughness polypropylene blend. Strength: 33.4MPa; Elongation at Break: 295%; Bending Strength: 33.7MPa; Bending Modulus: 1589MPa; Notched Impact Strength at IZOD23℃: 798.2J / m; Notched Impact Strength at IZOD-20℃: 92.6J / m .

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Abstract

The present invention relates to a metallocene ternary ethylene-propylene-rubber-low-density polyethylene cross-linked polymer. It is formed from (by mass%) 50-80% of metallocene ternary ethylene-propylene rubber, 15-45% of low-density polyethylene, 0-10% of inorganic rigid particles and 0.1-1% of peroxide initiator, its cross-linking degree is 65.5-72.1%, and it is used for toughening and modifying homopolymerized polypropylene. Besides, said invention also provides the concrete steps of its preparation method and its concrete application.

Description

Technical field: [0001] The invention relates to the technical field of homopolypropylene modification, in particular to a metallocene EPDM rubber-low-density polyethylene cross-linked product and a preparation method thereof. Background technique: [0002] As one of the four major synthetic resins, polypropylene is widely used in automobiles, home appliances, construction, packaging and many other fields due to its excellent mechanical properties, processing properties and chemical properties. Its total output is growing at a rate of about 7% per year. Among them, homopolypropylene has a simpler production process, and the raw material propylene can come from either light oil cracking gas or refinery gas, with low production costs and higher tensile strength and rigidity. has always had a high share. However, homopolypropylene has poor toughness, narrow application fields, and low added value of products, which has always been a difficult problem for manufacturers and user...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/12C08J3/24C08K3/34
Inventor 杨军忠郭丰平刘伟景振华王军王延伟孙春燕代振宇
Owner 洛阳石化吉润化工有限责任公司