High-impact high-stiffness polypropylene rotational molding material and preparation method thereof

A polypropylene, high-rigidity technology, applied in the field of high-impact and high-rigidity polypropylene rolling plastic and its preparation, can solve the problems of poor low temperature resistance and creep resistance, limited space for material performance improvement, etc. achieve the effect of improving compatibility

Inactive Publication Date: 2014-04-23
天津市华鑫达投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above invention, although the method of physically modifying polyethylene can improve its mechanical and anti-aging properties to a certain extent, the inherent properties of polyethylene determine that the space for improving the performance of the material is limited. In special applications, For example, in application environments such as high temperature and high rigidity, modified polyethylene cannot meet the requirements
CN1580165A discloses the application of a high-temperature-resistant and anti-corrosion polyolefin composition powder. By introducing crosslinking agent and polypropylene into polyethylene, the anti-corrosion and high-temperature resistance properties of the material are improved, but because the material contains a large number of polar groups, Therefore, it is mainly used in the field of surface anticorrosion, and is not suitable for the preparation of all-plastic parts.
Compared with polyethylene, these materials have obvious advantages in temperature resistance and rigidity, but their low temperature resistance and creep resistance are poor. They are not widely used in the field of rotational molding, and cannot be directly used in rotational molding parts such as automobiles.

Method used

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  • High-impact high-stiffness polypropylene rotational molding material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: A high-impact and high-rigidity polypropylene rolling plastic is composed of the following raw materials measured in parts by mass:

[0032] Polypropylene 100

[0033] Ethylene-octene copolymer 5

[0034] Compound antioxidant 0.4

[0035] Nano Talc 5

[0036] Ethylene bis stearamide 0.4

[0037] γ-Aminopropyltriethoxysilane 0.1.

[0038] The composite antioxidant is made by mixing phosphite antioxidant 168 and hindered phenolic antioxidant 1010 at a weight ratio of 1:0.3.

[0039] A preparation method of high-impact high-rigidity polypropylene rolling plastic is carried out according to the following steps: 0.1 part of γ-aminopropyltriethoxysilane is mixed with 5 parts of nanometer talcum powder in a high-speed mixer for 5 minutes; mixed with Nano talcum powder of γ-aminopropyltriethoxysilane and 100 parts of polypropylene, 5 parts of ethylene-octene copolymer, 0.4 parts of composite antioxidant, 0.4 parts of ethylene bisstearamide, at medium spee...

Embodiment 2

[0040] Embodiment 2: A high-impact and high-rigidity polypropylene rolling plastic is composed of the following raw materials measured in parts by mass:

[0041] Polypropylene 100

[0042] HDPE 25

[0043] 2,5-Dimethyl-2,5-bis(tert-butylperoxy)hexane 0.04

[0044] Triallyl isocyanurate 0.06

[0045]Ethylene-octene copolymer 5

[0046] Compound antioxidant 0.3

[0047] Ethylene bis stearamide 0.2.

[0048] The composite antioxidant is made by mixing phosphite antioxidant 168 and hindered phenolic antioxidant 1010 at a weight ratio of 1:0.5.

[0049] A preparation method of high-impact high-rigidity polypropylene rolling plastic is carried out according to the following steps:

[0050] Step 1: Pre-dry the high-density polyethylene in an oven with a set temperature of 80°C until the moisture content is lower than 600ppm, and grind it to 50 meshes for later use.

[0051] Step 2: Mix 0.04 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane and 0.06 parts of triallyl isocya...

Embodiment 3

[0053] Embodiment 3: A high-impact and high-rigidity polypropylene rolling plastic is composed of the following raw materials measured in parts by mass:

[0054] Polypropylene 100

[0055] HDPE 12.5

[0056] Linear Low Density Polyethylene 12.5

[0057] Dicumyl peroxide 0.04

[0058] Triallyl isocyanurate 0.06

[0059] Ethylene-octene copolymer 6

[0060] Compound antioxidant 0.3

[0061] Nano Talc 8

[0062] Ethylene bis stearamide 0.4

[0063] γ-Aminopropyltriethoxysilane 0.2.

[0064] The composite antioxidant is made by mixing phosphite antioxidant 168 and hindered phenolic antioxidant 1010 at a weight ratio of 1:0.7.

[0065] A preparation method of high-impact high-rigidity polypropylene rolling plastic is carried out according to the following steps:

[0066] Step 1: 12.5 parts of high-density polyethylene and 12.5 parts of linear low-density polyethylene were pre-dried in an oven with a set temperature of 80°C until the moisture content was lower than 600ppm, ...

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Abstract

The invention relates to a high-impact high-stiffness polypropylene rotational molding material and a preparation method thereof. The rolling plastic rotational molding material comprises the following raw materials: by weight, 100 parts of polypropylene, 0-30 parts of polyethylene, 0-0.1 part of a crosslinking agent, 0-0.15 part of an auxiliary crosslinking agent, 1-10 parts of an elastomer, 0.1-0.5 part of an antioxidant, 0-10 parts of a nano filler, 0.1-0.5 part of a dispersing lubricant and 0-0.4 part of a surface treatment agent. According to the invention, the crosslinkable polyethylene is added in a polypropylene melt mixing process for melt curing to obtain the high-impact high-stiffness polypropylene modified rotational molding material with a semi interpenetrating network structure, and the high-impact high-stiffness polypropylene modified rotational molding material can meet the material requirements of vehicles and other different fields. The curing reaction of the polyethylene belongs to the in situ curing, the material has the unique semi interpenetrating network structure, different components are mutually bitten or buckled, the compatibility between the polyethylene and polypropylene resin can be improved, and the performance advantages of the both are full played.

Description

technical field [0001] The invention relates to a rotational molding material and a rotational molding process, in particular to a high-impact, high-rigidity polypropylene rotational plastic and a preparation method thereof. Background technique [0002] Because the rotational molding process is suitable for forming large-scale hollow containers, and the internal stress of the product is very small, it has been developed rapidly in our country, and the products are becoming more and more extensive. The rotomolding process has increasingly rich requirements for the amount and variety of raw materials. At present, the types of rotomolding raw materials used by domestic manufacturers are single. More than 99% of the rotomolding products are made of PE, of which 95% are rotomolding grade linear low-density polyethylene. Ethylene (LLDPE), because linear low density polyethylene has the advantages of good stress crack resistance, excellent impact resistance, short molding cycle an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/06C08L23/08C08K13/06C08K13/02C08K9/06C08K5/526C08K5/13C08K3/34C08K5/20C08K5/14C08K5/3492B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92609B29C2948/92695B29C2948/92723C08L23/12B29B9/06B29C2948/9258B29C2948/92704C08J3/24C08J2323/06C08J2323/08C08K2201/011C08L23/14C08L2201/08C08L2205/025C08L2205/03C08L2205/035C08L2205/04C08L2207/062C08L23/0815C08K13/06C08K9/06C08K3/34C08L23/06
Inventor 李云岩许华郭洪涛刘学武尹聪
Owner 天津市华鑫达投资有限公司
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