Heat-resisting and anti-impact PPR (Polypropylene Random) pipe and preparation method thereof

An impact-resistant and heat-resistant technology, which is applied in the field of heat-resistant and impact-resistant PPR pipes and their preparation, can solve the problems of PPR pipe rigidity, tensile strength and heat-resistant performance degradation, and the degradation of PPR pipe impact resistance. Improvement of brittle defects, convenient operation and simple process

Active Publication Date: 2017-05-31
HUBEI DAYANG PLASTIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the use of elastomers to toughen and modify the preparation of PPR pipes can significantly improve the low-temperature brittleness of PPR pipes, but the addition of elastomers will lead to a certain degree of decline in the rigidity, tensile strength and heat resistance of PPR pipes; the use of inorganic rigid particles Filling PPR

Method used

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  • Heat-resisting and anti-impact PPR (Polypropylene Random) pipe and preparation method thereof
  • Heat-resisting and anti-impact PPR (Polypropylene Random) pipe and preparation method thereof

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preparation example Construction

[0027] The embodiment of the present invention also provides a preparation method of the above-mentioned heat-resistant and shock-resistant PPR pipe, which includes the following steps:

[0028] In terms of parts by weight, 20-30 parts of hydrotalcite and 10-20 parts of low-molecular-weight polybutene are mixed and stirred for 2-3 minutes at 2500-3000 r / min using a mixer to obtain modified hydrotalcite; wherein, low-molecular-weight The number average molecular weight of polybutene is 2300-2550.

[0029] Mix the modified hydrotalcite with 90-120 parts of random copolymerized polypropylene and 0.8-1.5 parts of antioxidant using a mixer at 450-550r / min for 3-4 minutes to obtain a mixed material; preferably, the mixed material is modified It is prepared by mixing and stirring 90-120 parts of random copolymerized polypropylene, 0.8-1.5 parts of antioxidant and 2.6-3.6 parts of color masterbatch at 450-550 r / min for 3-4 minutes.

[0030] Extrude the mixed material with a twin-scre...

Embodiment 1

[0035] This embodiment provides a heat-resistant and shock-resistant PPR pipe, the preparation method of which is as follows:

[0036] S11. Prepare raw materials in parts by weight: 10kg random copolymer polypropylene, 1kg part of low molecular weight polybutene, 2kg hydrotalcite, 0.08kg antioxidant, 0.26kg color masterbatch; wherein, the number average of low molecular weight polybutene The molecular weight is 2327, and the antioxidant is tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester.

[0037] S12. Mix 2 kg of hydrotalcite and 1 kg of low molecular weight polybutene with a mixer at 2500 r / min for 2.5 minutes to obtain modified hydrotalcite.

[0038] S13. Mix the modified hydrotalcite with 10 kg of random copolymerized polypropylene, 0.26 kg of color masterbatch, and 0.08 kg of antioxidant using a mixer at 400 r / min for 3 minutes to obtain a mixed material.

[0039] S14. Extrude the mixed material with a twin-screw extruder and cool it to obta...

Embodiment 2

[0041] This embodiment provides a heat-resistant and shock-resistant PPR pipe, the preparation method of which is as follows:

[0042] S21. Raw materials are prepared in parts by weight: 11kg of random copolymerized polypropylene, 1kg of low molecular weight polybutene, 3kg of hydrotalcite, 0.12kg of antioxidant, 0.28kg of color masterbatch; wherein, the number average of low molecular weight polybutene The molecular weight is 2440, and the antioxidant is tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester.

[0043] S22. Mix 3 kg of hydrotalcite and 1 kg of low molecular weight polybutene with a mixer at 2700 r / min for 3 minutes to obtain modified hydrotalcite.

[0044] S23. Mix the modified hydrotalcite with 11 kg of random copolymerized polypropylene, 0.28 kg of color masterbatch, and 0.12 kg of antioxidant using a mixer at 500 r / min for 3 minutes to obtain a mixed material.

[0045] S24. Extrude the mixed material with a twin-screw extruder and...

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Abstract

The invention provides a heat-resisting and anti-impact PPR (Polypropylene Random) pipe and a preparation method thereof and belongs to the technical field of PPR pipes. The heat-resisting and anti-impact PPR pipe is prepared from the following raw materials in parts by weight: 90-120 parts of polypropylene randon coplymer, 10-20 parts of low-molecular-weight polybutylene, 20-30 parts of hydrotalcite and 0.8-1.5 parts of an antioxidant, wherein the number mean molecular weight of the low-molecular-weight polybutylene is 2300-2550. The heat-resisting and anti-impact PPR pipe provided by the invention has good strength and heat resisting performance, and the low-temperature fragility is also improved. Furthermore, the invention relates to the preparation method of the heat-resisting and anti-impact PPR pipe.

Description

technical field [0001] The invention relates to the field of PPR pipes, and in particular to a heat-resistant and shock-resistant PPR pipe and a preparation method thereof. Background technique [0002] PPR (polypropylene random, random copolymerized polypropylene) pipe is a thermoplastic pipe made of random copolymerized polypropylene material. Compared with traditional cast iron pipes, galvanized steel pipes, cement pipes and other pipes, PPR pipes are energy-saving and material-saving , environmental protection, light weight, high strength, corrosion resistance, smooth inner wall without scaling, simple construction and maintenance, no toxic side effects, long service life, it is widely used in building water supply and drainage, gas transmission, electricity, optical cable sheathing, Industrial fluid transportation, agricultural irrigation and other fields. [0003] However, PPR pipes generally have defects of insufficient impact resistance, especially its low-temperatu...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/20C08K3/26B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08K2201/003C08L23/14C08L2201/08C08L2203/18C08L23/20C08K3/26
Inventor 郑根稳刘祥贵陈新洲刘海文胜周扬
Owner HUBEI DAYANG PLASTIC CO LTD
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