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A kind of high resistance to environmental stress cracking performance PPR water supply pipe material and its preparation method

A technology for environmental stress-resistant and water supply pipes, applied in rigid pipes, pipes, mechanical equipment, etc., can solve the problems of poor environmental stress cracking resistance, low impact strength, brittle and easy to crack, etc., and achieve improved environmental stress cracking resistance , the effect of expanding the scope of use

Active Publication Date: 2017-11-03
HENAN LIANSU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the structure of the PP base material itself, at low temperatures, the pipes prepared from the PP base material have defects such as brittleness and cracking, poor environmental stress cracking resistance, and low impact strength, which seriously restrict The development of PPR pipes in the north, therefore, seeking a PPR water supply pipe with ultra-low temperature resistance and high environmental stress cracking resistance is still a technical problem that needs to be solved urgently.

Method used

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  • A kind of high resistance to environmental stress cracking performance PPR water supply pipe material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A PPR water supply pipe with high environmental stress cracking resistance, the PPR water supply pipe is composed of the following raw materials in parts by weight:

[0033] Block copolymer polypropylene PPB 15 parts;

[0034] Random copolymerization of 65 parts of PPR;

[0035] 6 parts of low cis polybutadiene rubber;

[0036] 6 parts of polyisobutylene;

[0037] 2 parts of paraffin oil;

[0038] 0.3 parts of tert-butyl peroxide 2-ethylhexyl carbonate;

[0039] Antioxidant 0.3 parts.

[0040] The preparation method of the above-mentioned high environmental stress cracking resistance PPR water supply pipe specifically includes the following steps:

[0041] S1: Weigh each raw material according to the above formula;

[0042] S2: Add the low-cis polybutadiene rubber, polyisobutylene and antioxidants weighed in step S1 to the polymerizer for dissolution, and then add block copolymer polypropylene PPB, random copolymer PPR, paraffin oil and initiator The temperature is gradually increase...

Embodiment 2

[0046] A PPR water supply pipe with high environmental stress cracking resistance, the PPR water supply pipe is composed of the following raw materials in parts by weight:

[0047] 18 parts of block copolymer polypropylene PPB;

[0048] Random copolymerization of 68 parts of PPR;

[0049] 7 parts of low cis polybutadiene rubber;

[0050] 7 parts of polyisobutylene;

[0051] 3 parts of paraffin oil;

[0052] 0.4 parts of tert-butyl peroxide 2-ethylhexyl carbonate;

[0053] Antioxidant 0.4 parts.

[0054] The preparation method of this embodiment is the same as that of embodiment 1.

Embodiment 3

[0056] A PPR water supply pipe with high environmental stress cracking resistance, the PPR water supply pipe is composed of the following raw materials in parts by weight:

[0057] 19 parts of block copolymer polypropylene PPB;

[0058] Random copolymerization of 70 parts of PPR;

[0059] 9 parts of low cis polybutadiene rubber;

[0060] 9 parts of polyisobutylene;

[0061] 3 parts of paraffin oil;

[0062] 0.4 parts of tert-butyl peroxide 2-ethylhexyl carbonate;

[0063] Antioxidant 0.4 parts.

[0064] The preparation method of this embodiment is the same as that of embodiment 1.

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Abstract

The invention relates to a PPR (polypropylene-random) water supply pipe material with high environmental stress cracking resistance. The PPR water supply pipe material comprises raw materials in parts by weight as follows: 15-20 parts of PPB (polypropylene block copolymer), 65-75 parts of PPR, 6-10 parts of low-cis polybutadiene rubber, 6-10 parts of polyisobutene, 2-4 parts of paraffin oil, 0.3-0.5 parts of an initiator and 0.3-0.5 parts of an antioxidant. The invention further provides an application of the PPR water supply pipe material in preparation of PPR water supply pipes. The PPR water supply pipes prepared from the PPR water supply pipe material have excellent environmental stress cracking resistance, cold resistance and low-temperature toughness and can be used in an ultra-low-temperature environment, so that the use range of the PPR pipes is enlarged.

Description

Technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a PPR water supply pipe with high environmental stress cracking resistance. Background technique [0002] The PPR pipe extruded from the special material of random copolymer polypropylene (PPR) has good impact resistance, temperature resistance, creep resistance and good hot-melt welding performance, so it can be used as an environmentally friendly transmission Water pipes are widely used in building cold and hot water, pure water supply, heating and general industrial fluid pipes. However, due to the structure of the PP base material, at low temperatures, the pipe prepared from the PP base material has defects such as brittleness and easy cracking, and has poor environmental stress crack resistance and low impact strength, which severely restricts The development of PPR pipes in the north, therefore, seeking a PPR water supply pipe with ultra-low temperature resistance and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L9/00C08L53/00C08L91/06F16L9/12
CPCC08L23/14C08L2201/08C08L2203/18C08L2205/035F16L9/12C08L53/00C08L9/00C08L23/22C08L91/06C08K5/14
Inventor 代营伟李锦松秦立臣王焱阮艳灵秦亚辉秦賀霞徐汝冰赵宏强
Owner HENAN LIANSU IND