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A heat-resistant and stable polyethylene composition

A heat-resistant stability and composition technology, applied in the field of polyethylene resin composition, can solve the problems of insufficient long-term thermal aging performance, achieve good high-temperature oxidation resistance, high long-term heat-resistant stability, and improve thermal stability Effect

Active Publication Date: 2016-12-07
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the unreasonable reason of the auxiliary agent system and the resin structure of the inventive composition, the long-term thermal aging performance is still insufficient.

Method used

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  • A heat-resistant and stable polyethylene composition
  • A heat-resistant and stable polyethylene composition
  • A heat-resistant and stable polyethylene composition

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Embodiment Construction

[0022] A heat-resistant and stable polyethylene composition of the present invention will be further described below through specific examples, wherein Example 1 is the best example.

[0023] The proportioning components of the polyethylene resin composition for hot water pipes are shown in Table 1 and Table 2.

[0024] Density is tested according to GB / T 1033.2-2010, using method D, and tested after boiling for 30 minutes; melt mass flow rate (MFR) is tested according to GB / T 3682-2000, with a load of 2.16kg; the amount of double bonds at the end of the composition And the test method of carbonyl content is: use a hot-pressed film machine to sample, the sample thickness is 250µm, the tablet temperature is 170°C, the pressure is 2MPa, the preheating is 30s, the pressure holding time is 0.5min, and the pressure is released and directly cooled to below 50°C; infrared spectrum collection The condition is to scan 32 times and the resolution is 4; -1 The area between the carbonyl ...

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Abstract

The invention discloses a polyethylene composite with thermal stability, and belongs to the field of high polymer materials. The polyethylene composite is characterized by being prepared from the following components in parts by weight: 100 parts of polyethylene resin, 0.3-0.7 parts of antioxidant, 0.05-0.15 parts of chloride ion neutralizer, and 0.04-0.18 parts of N,N'-bis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine as an anti-copper agent, wherein the polyethylene resin is a copolymer of ethylene and 1-butylene and / or 1-hexylene; the density is 0.932-0.948g / cm<3>; a melt flow rate is 0.35-1.0g / 10min; the double bond content of an end group in the composite is 0.0065-0.019; and the carbonyl content is 0.32-0.71. According to the polyethylene composite, an assistant system and a resin structure are more reasonably collocated, so that the polyethylene composite has better high-temperature oxidation resistance, long-term thermal stability and higher physical and mechanical strength.

Description

technical field [0001] The invention discloses a heat-resistant and stable polyethylene composition, which belongs to the field of macromolecular materials, and in particular relates to a polyethylene resin composition used for long-term high-temperature service conditions. Background technique [0002] Polyethylene of raised temperature resistance (PE-RT) pipe material is the latest generation of special plastic for heat-resistant pipes and geothermal pipes. Linked polyethylene plastic. The high temperature hydrostatic strength grade of PE-RT pipe material is determined according to the grading principle stipulated in ISO24033:2009. According to the high temperature hydrostatic strength grade from low to high, it is divided into PE-RT type I and PE-RT type II. It is determined through long-term hydrostatic experiments on pipes at multiple temperatures (up to 110°C) for more than 8,760 hours. PE-RT pipe materials are currently mainly used in the production of cold and hot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K13/02C08K5/134C08K5/3492C08K5/526C08K5/25C08K3/22
CPCC08K3/22C08K5/13C08K5/1345C08K5/25C08K5/34922C08K5/526C08K13/02C08K2003/2286C08K2003/2296C08L2201/08C08L2203/18C08L23/0815
Inventor 王群涛唐岩郭锐王日辉许平苑东兴高凌雁侯斌石晶
Owner CHINA PETROLEUM & CHEM CORP
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