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Polypropylene composition and flame-retardant antistatic pipe

A polypropylene composition, flame retardant and antistatic technology, applied in the field of polymers, can solve the problems of poor flame retardancy, poor antistatic performance, and decline in mechanical and mechanical properties of pipe products

Active Publication Date: 2017-11-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the poor flame retardancy and poor antistatic property of existing PP-H pipe materials when preparing PP-H pipes, and the mechanical and mechanical properties of pipe products after conventional flame retardant and antistatic modification. Greatly reduce the defects that are not suitable for special fields such as high-temperature industrial sewage pipes, and provide a new polypropylene composition and a high-performance flame-retardant antistatic polypropylene pipe made of the polypropylene composition (which can be called PP-H pipe)

Method used

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Examples

Experimental program
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Effect test

preparation example 1

[0094] This preparation example is used to illustrate the basic polypropylene resin provided by the present invention and its preparation method.

[0095] The propylene polymerization reaction is carried out on a polypropylene unit, and the main equipment of the unit includes a prepolymerization reactor, a first loop reactor, a second loop reactor and a third gas phase reactor. The polymerization method and steps are as follows.

[0096] (1) Prepolymerization reaction

[0097] The main catalyst (DQC-401 catalyst, provided by Sinopec Catalyst Company Beijing Aoda Branch), the cocatalyst (triethylaluminum), the first external electron donor (dicyclopentyl-dimethoxysilane, DCPMS) after 6 ℃, 20min after pre-contact, continuously into the continuous stirred tank prepolymerization reactor for prepolymerization reactor. The flow rate of triethylaluminum (TEA) entering the prepolymerization reactor is 6.33g / hr, the flow rate of dicyclopentyl-dimethoxysilane is 0.3g / hr, the flow rate...

preparation example 2

[0105] This preparation example is used to illustrate the basic polypropylene resin provided by the present invention and its preparation method.

[0106] The catalyst used in Preparation Example 2, pre-complexation, and polymerization process conditions are the same as those in Preparation Example 1. The difference with Preparation Example 1 is: the amount of hydrogen in the second reactor in the second stage becomes 13000ppm, and the hydrogen in the second step gas phase reactor 2 / (C 2 +C 3 ) was adjusted to 0.49 (mol / mol). The first external electron donor was changed to methyl-isopropyl-dimethoxysilane (MIPMS), and the amount added remained unchanged. The obtained polymer analysis results and polymer physical properties are listed in Table 1 and Table 2.

[0107] It can be seen from the results shown in Table 1 and Table 2 that the polypropylene material prepared according to the method of the present invention has high melt strength and relatively high high and low t...

Embodiment 1

[0109] This example is used to illustrate the polypropylene composition and the flame-retardant and antistatic PP-H pipe provided by the present invention.

[0110] The polypropylene composition provided in this example contains Preparation Example 1, a halogen-free flame retardant, a conductive filler and a lubricant.

[0111] The halogen-free flame retardant is superfine aluminum hydroxide by precipitation method, produced by Jinan Taixing Company, with a particle size of 500-800nm.

[0112] The conductive filler is acetylene carbon black, purchased from Tianjin Lihuajin Chemical Co., Ltd.;

[0113] The lubricant is a PEG lubricant produced by Clariant, Switzerland, with a weight-average molecular weight of 10,000.

[0114] (1) Preparation of polypropylene composition:

[0115] The above-mentioned components were weighed and mixed according to the proportion, wherein the preparation example 1 was 100kg, the halogen-free flame retardant was 40kg, the conductive filler was 3...

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Abstract

The application relates to a flame-retardant antistatic polypropylene composition, which includes a basic polypropylene resin, a fire retardant and a conductive filling material. The basic polypropylene resin comprises a propylene homopolymer component and a propylene / ethylene copolymer component, wherein the propylene homopolymer component include a first propylene homopolymer and a second propylene homopolymer. The basic homopolymeric polypropylene resin has the molecular weight distribution (M<w> / M<n>) of 4-10, and M<z+1> / M<w> more than 10 and less than 20; the content of a xylene soluble substance at the room temperature is more than 10% by weight and less than 30% by weight, and the ratio of Mw of a trichlorobenzene soluble substance to Mw of a trichlorobenzene insoluble substance at the room temperature is more than 0.4 and less than 1. The provided high-performance flame-retardant antistatic polypropylene composition is excellent in mechanical strength and processing performance, qualified in optical performance, and relatively excellent in antistatic property. The application further relates to a pipe made from the composition.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to a flame-retardant, antistatic and high-melt-strength polypropylene composition, a flame-retardant, antistatic, high-low temperature, impact-resistant PP-H pipe and a preparation method thereof. Background technique [0002] Polypropylene pipe materials are mainly divided into homopolypropylene (PP-H), block copolymerized polypropylene (PP-B) and random copolymerized polypropylene (PP-R). The differences in the structures of these three materials make them different application characteristics, and therefore have different uses. Among them, PP-H can be used in high-temperature industrial sewage pipes and other fields due to its excellent hydrostatic resistance, good chemical corrosion resistance and high heat distortion temperature. [0003] However, plastic pipes are insulating materials and are prone to static electricity. The suspended dust in the industrial production environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L71/02C08K13/02C08K3/22C08K3/04C08K3/32C08K7/24C08K13/04C08F110/06C08F210/06C08F210/02C08F4/646
CPCC08F110/06C08F210/06C08K2201/001C08K2201/011C08K2201/017C08L23/12C08L2201/02C08L2201/04C08L2201/22C08L2203/18C08L2205/025C08L2205/035C08L2308/00C08L23/14C08L71/02C08K13/02C08K2003/2227C08K3/04C08K2003/323C08K13/04C08K7/24C08F4/6465
Inventor 徐耀辉吕明福郭鹏张师军邹浩邵静波白弈青杨庆泉权慧解娜
Owner CHINA PETROLEUM & CHEM CORP
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