A kind of polypropylene composition and high-performance flame-retardant antistatic polypropylene pipe

Abstract

The invention relates to a flame retardant antistatic polypropylene composition and a pipe prepared therefrom. The composition comprises basic polypropylene resin, a fire retardant, and a conductive filling material. The basic polypropylene resin comprises a propylene homopolymer component and ethylene-1-butene copolymer; wherein the propylene homopolymer component at least comprises first propylene homopolymer and second propylene homopolymer. In the basic polypropylene resin, the ratio of the Mw of a substance, which is soluble in trichlorobenzene at a room temperature, to the Mw of a substance, which is insoluble in trichlorobenzene at a room temperature, is greater than 0.5 and less than 1; preferably in a range of 0.5 to 0.8. At a room temperature, the content of a substance, which is soluble in xylene at a room temperature, is in a range of 10 wt% to 30 wt%. The content of 1-butene is 5 to 20 wt%. The provided pipe has a good antistatic and flame retardant performance, moreover, the melt strength is high, and the impact resistant property is good.

Description

technical field

[0001] The invention relates to the field of macromolecules, in particular to a flame-retardant and antistatic high-melt strength polypropylene composition, a flame-retardant and 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...

Examples

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 Beijing Aoda Branch of Sinopec Catalyst Company), co-catalyst (triethylaluminum), and the first external electron donor (isopropylcyclopentyldimethoxysilane, IPCPMS) were After pre-contacting at 6°C for 20 minutes, it is continuously fed into a continuous stirred tank prepolymerization reactor for prepolymerization. The flow of triethylaluminum (TEA) entering the prepolymerization reactor is 6.33g / hr, the flow of isopropylcyclopentyldimethoxysilane is 0....

preparation example 2

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

[0106] The catalyst used, pre-complexation, polymerization process conditions and auxiliary agent formulation and addition are the same as in Preparation Example 1. The difference from Preparation Example 1 is that the second external electron donor is replaced by 2,-isopropyl-2-isopentyl-1,3-dimethoxypropane (IPPMP), and the addition amount remains unchanged, and the second The amount of hydrogen in the second reactor in the stage was adjusted to 4000ppm. The obtained polymer analysis results and polymer physical properties are listed in Table 1 and Table 2.

[0107] As can be seen from the results shown in Table 1 and Table 2, the basic polypropylene resin material prepared according to the method of the present invention has higher melt strength, and has higher tensile strength, flexural modulus, and notched impact simultaneously. strengt...

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...

technical field

[0001] The invention relates to the field of macromolecules, in particular to a flame-retardant and antistatic high-melt strength polypropylene composition, a flame-retardant and 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...

Examples

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 Beijing Aoda Branch of Sinopec Catalyst Company), co-catalyst (triethylaluminum), and the first external electron donor (isopropylcyclopentyldimethoxysilane, IPCPMS) were After pre-contacting at 6°C for 20 minutes, it is continuously fed into a continuous stirred tank prepolymerization reactor for prepolymerization. The flow of triethylaluminum (TEA) entering the prepolymerization reactor is 6.33g / hr, the flow of isopropylcyclopentyldimethoxysilane is 0....

preparation example 2

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

[0106] The catalyst used, pre-complexation, polymerization process conditions and auxiliary agent formulation and addition are the same as in Preparation Example 1. The difference from Preparation Example 1 is that the second external electron donor is replaced by 2,-isopropyl-2-isopentyl-1,3-dimethoxypropane (IPPMP), and the addition amount remains unchanged, and the second The amount of hydrogen in the second reactor in the stage was adjusted to 4000ppm. The obtained polymer analysis results and polymer physical properties are listed in Table 1 and Table 2.

[0107] As can be seen from the results shown in Table 1 and Table 2, the basic polypropylene resin material prepared according to the method of the present invention has higher melt strength, and has higher tensile strength, flexural modulus, and notched impact simultaneously. strengt...

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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