CN113831627A - PEX pipe with high oxidation induction period and preparation method thereof - Google Patents
PEX pipe with high oxidation induction period and preparation method thereof Download PDFInfo
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/2053—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the additives only being premixed with a liquid phase
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses a PEX pipe with a high oxidation induction period and a preparation method thereof, belonging to the technical field of polymer pipes. The PEX pipe comprises the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.2-1 part of cross-linking agent, 0.2-0.6 part of antioxidant, 0.1-0.3 part of auxiliary antioxidant and 0.1-0.3 part of synergistic stabilizer. The addition of the synergistic stabilizer can play a role in greatly improving the oxidation resistance of the pipe, and on the other hand, the addition of the synergistic stabilizer can ensure that the contact and the adsorption of the crosslinking agent and the antioxidant can be avoided to the maximum extent and the oxidation resistance can be improved by adjusting the crosslinking process and adding the antioxidant, the antioxidant and the auxiliary antioxidant in sequence; under the formula selection and the crosslinking process, the oxidation induction time can reach 85min, the crosslinking degree reaches 85%, and the oxidation resistance is obviously improved.
Description
Technical Field
The invention belongs to the technical field of polymer pipes, and particularly relates to a PEX pipe with a high oxidation induction period and a preparation method thereof.
Background
The PEX pipe is also called a cross-linked polyethylene pipe and is made of polyethylene materials, and the linear molecular structure of the polyethylene is changed into a three-dimensional network structure through physical and chemical methods, so that the performance of the polyethylene is improved. The main raw material of the PEX pipe is HDPE, and auxiliary agents such as an initiator, a cross-linking agent, a catalyst and the like, and other modifiers can be added if special requirements exist.
Crosslinked polyethylene pipe is because of its superior hydraulic pressure resistant, high temperature resistance can be generally applied to life cold and hot water and carry and ground heating field, however, because the residual free chlorine in the running water has higher oxidation corrosion effect to the pipe, especially under the high temperature condition, this kind of oxidation effect is more obvious, can directly influence the life of pipe. The antioxidant performance of the pipe can be improved to a certain extent by adding the antioxidant, but because the antioxidant and the cross-linking agent have serious conflict effect, the traditional mixing process can not ensure the uniform mixing and dispersion of the antioxidant, but also can cause the encounter and conflict of the antioxidant and the cross-linking agent, so that the antioxidant performance of the pipe is poor, and the cross-linking degree can not meet the standard requirement. Further, since PEX-a is processed by a ram extruder, the extruder does not have shearing and mixing functions, and neither the antioxidant nor the crosslinking agent has uneven dispersion, particularly, the antioxidant is difficult to break up after the small antioxidant particles with higher melting point are melted due to lack of shearing dispersion function, and the small antioxidant particles are usually inlaid in the pipe wall in the form of independent particles, which not only cannot play an antioxidant role, but also becomes a defect, and easily causes pipe breakage.
Therefore, how to effectively solve the problem of oxidation resistance of the PEX pipe is a technical problem to be solved urgently at present.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an improved PEX pipe raw material formula, and the raw material feeding sequence is adjusted by optimizing the formula composition and proportion, so that the oxidation resistance of the pipe is greatly improved, and the pipe is endowed with excellent chlorine resistance and oxidation resistance.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.2-1 part of cross-linking agent, 0.2-0.6 part of antioxidant, 0.1-0.3 part of auxiliary antioxidant and 0.1-0.3 part of synergistic stabilizer.
Further, the high-density polyethylene resin is a special resin powder for crosslinked polyethylene, and the melt index range is as follows: 0.1-1.0g/10 min.
Further, the cross-linking agent is one of di-tert-butyl peroxide, dicumyl peroxide or dibenzoyl peroxide.
Further, the antioxidant is one or more of antioxidant 1076, antioxidant 1010, antioxidant 1330 and antioxidant 1098.
Further, the auxiliary antioxidant is antioxidant 626 or antioxidant 168.
Further, the synergistic stabilizer is one of HS 112 or HALS 765.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
(1) putting the high-density polyethylene resin into a stirrer, starting stirring, atomizing the cross-linking agent while stirring, spraying the atomized cross-linking agent onto the surface of the polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of the formula, stopping atomization, and continuing stirring for 5-10 minutes to obtain a mixture A;
(2) weighing the antioxidant and the auxiliary antioxidant according to the weight parts, dissolving the antioxidant and the auxiliary antioxidant in an acetone solution, and continuously stirring until the antioxidant is completely dissolved to obtain a mixture B; adding the mixture B into the continuously stirred mixture A through an atomizer, and stirring for 5-10 minutes to obtain a mixture C;
(3) heating the synergistic stabilizer to 60 ℃, adding the synergistic stabilizer into an atomizer, spraying the synergistic stabilizer into the mixture C through the atomizer, and stirring for 5-10 minutes to obtain a mixture D;
(4) and (3) performing extrusion molding by a plunger type extruder to obtain the PEX pipe with high oxidation induction period.
Further, the extrusion parameters of the extruder are as follows: the temperature of the feeding section of the extruder is 90-110 ℃, the temperature of the connector is 150-.
Further, the mass ratio of the antioxidant, the auxiliary antioxidant and the acetone in the step (2) is 1: 4.
The oxidation resistance of the pipe is greatly improved by optimizing the formula composition and proportion and adjusting the raw material feeding sequence. According to the invention, the antioxidant is dissolved into the solution firstly, and then the solution is added into the resin powder through the atomizer, so that the uniformity of the antioxidant in the resin is greatly improved, meanwhile, the selection space of the antioxidant is expanded, the antioxidant with good effect and higher melting point is selected, and the produced pipe has no infusible and undispersed antioxidant particles. The cross-linking agent and the synergistic stabilizer are added in an atomizing and spraying mode, so that the uniformity of the dispersing of the auxiliary agent can be obviously improved. Meanwhile, the addition of the synergistic stabilizer can weaken the conflict effect of the cross-linking agent and the antioxidant, and can play a role in greatly improving the oxidation resistance of the pipe, so that the pipe is endowed with excellent chlorine resistance;
on the other hand, the crosslinking process is adjusted according to the specification, the crosslinking sequence is adjusted to firstly add the crosslinking agent, then add the antioxidant and the auxiliary antioxidant, and finally add the synergistic stabilizer, so that the crosslinking process can avoid the contact and the adsorption of the crosslinking agent and the antioxidant to the maximum extent, and the oxidation resistance is improved;
under the formula selection and the crosslinking process, the oxidation induction time can reach 85min, the crosslinking degree reaches 85%, and the oxidation resistance is obviously improved.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments, but is not limited thereto.
Example 1
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.5 part of di-tert-butyl peroxide, 10760.4 parts of antioxidant, 1680.2 parts of auxiliary antioxidant and HS 1120.15 parts of synergistic stabilizer.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
a) putting the high-density polyethylene resin into a high-speed stirrer, starting stirring, atomizing the cross-linking agent by using an atomizer fixed on a cover of the stirrer while stirring, spraying the atomized cross-linking agent onto the surface of the polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of a formula, stopping atomization, and continuing stirring for 7 minutes;
b) accurately weighing the antioxidant 1076 and the auxiliary antioxidant 168, dissolving the antioxidant in acetone according to the proportion of 1:4, continuously stirring the mixture until the antioxidant is completely dissolved, starting the high-speed stirrer again, adding the solution prepared in the step a) into the raw materials prepared in the step a) through an atomizer, and stirring the mixture for 5 minutes;
c) heating the synergistic stabilizer HS 112 to 60 ℃, adding the synergistic stabilizer HS 112 into an atomizer, spraying the synergistic stabilizer HS 112 into the raw materials in the step b) through the atomizer, and stirring for 7 minutes;
d) and (3) extruding and molding the material prepared in the step c) by a plunger type extruder to obtain the PEX pipe with a high oxidation induction period, wherein the temperature of a feeding section of the extruder is 90-110 ℃, the temperature of a connecting body is 150-.
Example 2
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.5 part of di-tert-butyl peroxide, 10100.5 parts of antioxidant, 6260.25 parts of auxiliary antioxidant and 7650.15 parts of synergistic stabilizer.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
a) putting the high-density polyethylene resin into a high-speed stirrer, starting stirring, atomizing the cross-linking agent by using an atomizer fixed on a cover of the stirrer while stirring, spraying the atomized cross-linking agent onto the surface of the polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of a formula, stopping atomization, and continuing stirring for 8 minutes;
b) accurately weighing antioxidant 1010 and auxiliary antioxidant 626, dissolving the antioxidant 1010 and the auxiliary antioxidant 626 into acetone according to the proportion of 1:4, continuously stirring the mixture until the antioxidant is completely dissolved, starting the high-speed stirrer again, adding the solution prepared in the step a) into the raw materials prepared in the step a) through an atomizer, and stirring the mixture for 5 minutes;
c) heating the synergistic stabilizer HALS765 to 60 ℃, adding into an atomizer, spraying into the raw material of the step b) through the atomizer, and stirring for 8 minutes.
d) And (3) extruding and molding the material prepared in the step c) by a plunger type extruder to obtain the PEX pipe with a high oxidation induction period, wherein the temperature of a feeding section of the extruder is 90-110 ℃, the temperature of a connecting body is 150-.
Example 3
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.8 part of di-tert-butyl peroxide, 10980.4 parts of antioxidant, 1680.2 parts of auxiliary antioxidant and HS 1120.25 parts of synergistic stabilizer.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
a) putting the high-density polyethylene resin into a high-speed stirrer, starting stirring, atomizing the cross-linking agent by using an atomizer fixed on a cover of the stirrer while stirring, spraying the atomized cross-linking agent onto the surface of the polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of a formula, stopping atomization, and continuing stirring for 10 minutes;
b) antioxidant 1098 and secondary antioxidant 168 were accurately weighed, dissolved in acetone at a ratio of 1:4, and stirring was continued until all the antioxidant was dissolved. Starting the high-speed stirrer again, adding the solution prepared in the step into the raw materials prepared in the step a) through an atomizer, and stirring for 8 minutes;
c) heating the synergistic stabilizer HS 112 to 60 ℃, adding the synergistic stabilizer HS 112 into an atomizer, spraying the synergistic stabilizer HS 112 into the raw materials in the step b) through the atomizer, and stirring for 8 minutes;
d) and (3) extruding and molding the material prepared in the step c) by a plunger type extruder to obtain the PEX pipe with a high oxidation induction period, wherein the temperature of a feeding section of the extruder is 90-110 ℃, the temperature of a connecting body is 150-.
Example 4
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 1 part of diisophenylpropyl peroxide, 13300.4 parts of antioxidant, 1680.1 parts of auxiliary antioxidant and 1120.1 parts of synergistic stabilizer HS.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
a) putting the high-density polyethylene resin into a high-speed stirrer, starting stirring, atomizing the cross-linking agent by using an atomizer fixed on a cover of the stirrer while stirring, spraying the atomized cross-linking agent onto the surface of the polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of a formula, stopping atomization, and continuing stirring for 10 minutes;
b) antioxidant 1330 and secondary antioxidant 168 were accurately weighed, dissolved in acetone at a ratio of 1:4, and stirring was continued until all of the antioxidants were dissolved. Starting the high-speed stirrer again, adding the solution prepared in the step into the raw materials prepared in the step a) through an atomizer, and stirring for 8 minutes;
c) heating the synergistic stabilizer HS 112 to 60 ℃, adding the synergistic stabilizer HS 112 into an atomizer, spraying the synergistic stabilizer HS 112 into the raw materials in the step b) through the atomizer, and stirring for 8 minutes;
d) and (3) extruding and molding the material prepared in the step c) by a plunger type extruder to obtain the PEX pipe with a high oxidation induction period, wherein the temperature of a feeding section of the extruder is 90-110 ℃, the temperature of a connecting body is 150-.
Example 5
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 1 part of dibenzoyl peroxide, 13300.2 parts of antioxidant, 6260.3 parts of auxiliary antioxidant and 7650.3 parts of synergistic stabilizer HALS.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
a) putting the high-density polyethylene resin into a high-speed stirrer, starting stirring, atomizing the cross-linking agent by using an atomizer fixed on a cover of the stirrer while stirring, spraying the atomized cross-linking agent onto the surface of the polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of a formula, stopping atomization, and continuing stirring for 10 minutes;
b) antioxidant 1330 and secondary antioxidant 626 are accurately weighed, dissolved in acetone at a ratio of 1:4, and stirred continuously until all antioxidants are dissolved. Starting the high-speed stirrer again, adding the solution prepared in the step into the raw materials prepared in the step a) through an atomizer, and stirring for 8 minutes;
c) heating the synergistic stabilizer HALS765 to 60 ℃, adding into an atomizer, spraying into the raw materials in the step b) through the atomizer, and stirring for 8 minutes;
d) and (3) extruding and molding the material prepared in the step c) by a plunger type extruder to obtain the PEX pipe with a high oxidation induction period, wherein the temperature of a feeding section of the extruder is 90-110 ℃, the temperature of a connecting body is 150-.
Comparative example 1
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.8 part of cross-linking agent di-tert-butyl peroxide, 10980.4 parts of antioxidant and 1680.2 parts of auxiliary antioxidant.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
a) putting the high-density polyethylene resin into a high-speed stirrer, starting stirring, atomizing the cross-linking agent by using an atomizer fixed on a cover of the stirrer while stirring, spraying the atomized cross-linking agent onto the surface of the polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of a formula, and stopping atomization. And stirring is continued for 10 minutes;
b) antioxidant 1098 and secondary antioxidant 168 were accurately weighed, dissolved in acetone at a ratio of 1:4, and stirring was continued until all the antioxidant was dissolved. Starting the high-speed stirrer again, adding the solution prepared in the step into the raw materials prepared in the step a) through an atomizer, and stirring for 8 minutes;
c) and (3) extruding and molding the material prepared in the step b) by a plunger type extruder to obtain the PEX pipe with the high oxidation induction period, wherein the temperature of the feeding section of the extruder is 90-110 ℃, the temperature of the connecting body is 150-.
This comparative example is the same as example 3 except that no synergistic stabilizer is added.
Comparative example 2
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.8 part of cross-linking agent di-tert-butyl peroxide, 10980.4 parts of antioxidant, 1680.2 parts of auxiliary antioxidant and 1120.25 parts of synergistic stabilizer.
A preparation method of a PEX pipe with a high oxidation induction period comprises the following steps:
a) the high-density polyethylene, the cross-linking agent, the antioxidant, the auxiliary antioxidant and the synergistic stabilizer are put into a high-speed stirrer to be stirred for 10 minutes.
b) Extruding and molding the material prepared in the step a) by a plunger type extruder to obtain the PEX pipe with a high oxidation induction period, wherein the temperature of a feeding section of the extruder is 90-110 ℃, the temperature of a connecting body is 150-.
The comparative example changes the adding sequence of the raw materials in the example 3, changes the adding sequence of the cross-linking agent-antioxidant and the auxiliary antioxidant-synergistic stabilizer into the traditional one-step adding mode, and the rest is the same as the example 3.
Comparative example 3
The PEX pipe with the high oxidation induction period is prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.8 part of cross-linking agent di-tert-butyl peroxide, 10980.4 parts of antioxidant, 1680.2 parts of auxiliary antioxidant and 1120.25 parts of synergistic stabilizer.
A PEX pipe with high oxidation induction period is prepared by the following steps:
a) putting the high-density polyethylene resin into a high-speed stirrer; antioxidant 1098 and secondary antioxidant 168 were accurately weighed, dissolved in acetone at a ratio of 1:4, and stirring was continued until all the antioxidant was dissolved. The high-speed stirrer is started, and the prepared solution is added into the polyethylene resin raw material through the atomizer and stirred for 8 minutes.
b) Heating the synergistic stabilizer HS 112 to 60 ℃, adding the synergistic stabilizer HS 112 into an atomizer, spraying the synergistic stabilizer HS 112 into the raw materials in the step a) through the atomizer, and stirring for 8 minutes.
c) And spraying the cross-linking agent onto the surface of the polyethylene resin being stirred through an atomizer until the dosage of the cross-linking agent meets the requirement of the formula, stopping atomization, and continuing stirring for 10 minutes.
d) And (3) extruding and molding the material prepared in the step c) by a plunger type extruder to obtain the PEX pipe with a high oxidation induction period, wherein the temperature of a feeding section of the extruder is 90-110 ℃, the temperature of a connecting body is 150-.
The comparative example changes the adding sequence of the raw materials in example 3 from the adding sequence of the cross-linking agent-antioxidant and the auxiliary antioxidant-synergistic stabilizer to the adding sequence of the antioxidant and the auxiliary antioxidant-synergistic stabilizer-cross-linking agent, and the rest is the same as that in example 3.
Performance testing
The pipes obtained in the embodiment of the invention and the comparative example were subjected to performance testing by referring to the national standard testing method, and the test results are shown in table 1:
table 1 results of performance testing
The data in the table show that all indexes such as the crosslinking degree of the embodiment of the invention are superior to those of the comparative example, the comparative example 1 without adding the synergistic stabilizer has obviously reduced oxidation induction time and greatly reduced oxidation resistance, and the comparative examples 2-3 with the changed process have unobvious change of the crosslinking degree, but the oxidation resistance is also greatly reduced. The reason is that no synergistic stabilizer is added, or the time sequence of the addition is different, so that the synergistic stabilizer cannot directly participate or weaken the conflict effect of the cross-linking agent and the antioxidant, and the antioxidant performance of the material cannot be effectively improved. Therefore, the selection amount of the raw materials, the addition sequence of the raw materials and other process parameters are the key for ensuring the high oxidation resistance of the PEX pipe, and the final performance of the pipe is reduced due to the change of the raw materials and the process parameters.
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (9)
1. The PEX pipe with the high oxidation induction period is characterized by comprising the following raw materials in parts by weight: 100 parts of high-density polyethylene resin, 0.2-1 part of cross-linking agent, 0.2-0.6 part of antioxidant, 0.1-0.3 part of auxiliary antioxidant and 0.1-0.3 part of synergistic stabilizer.
2. The PEX pipe with high oxidation induction period as claimed in claim 1, wherein the high-density polyethylene resin is special resin powder for crosslinked polyethylene, and the melt index ranges from: 0.1-1.0g/10 min.
3. The high oxidation induction period PEX pipe of claim 1, wherein the crosslinking agent is one of di-t-butyl peroxide, dicumyl peroxide, or dibenzoyl peroxide.
4. The PEX pipe with high oxidation induction period as claimed in claim 1, wherein the antioxidant is one or more of an antioxidant 1076, an antioxidant 1010, an antioxidant 1330 and an antioxidant 1098.
5. The PEX pipe with high oxidation induction period as recited in claim 1, wherein the secondary antioxidant is antioxidant 626 or antioxidant 168.
6. The high oxidation induction period PEX pipe of claim 1, wherein the synergistic stabilizer is one of HS 112 or HALS 765.
7. A method for preparing PEX pipe with high oxidation induction period as claimed in any one of claims 1 to 6, which comprises the following steps:
(1) putting the high-density polyethylene resin into a stirrer, starting stirring, atomizing the cross-linking agent while stirring, spraying the atomized cross-linking agent onto the surface of the high-density polyethylene resin being stirred until the dosage of the cross-linking agent meets the requirement of the formula, stopping atomization, and continuing stirring for 5-10 minutes to obtain a mixture A;
(2) weighing the antioxidant and the auxiliary antioxidant according to the weight parts, dissolving the antioxidant and the auxiliary antioxidant in an acetone solution, and continuously stirring until the antioxidant is completely dissolved to obtain a mixture B; adding the mixture B into the continuously stirred mixture A through an atomizer, and stirring for 5-10 minutes to obtain a mixture C;
(3) heating the synergistic stabilizer to 60 ℃, adding the synergistic stabilizer into an atomizer, spraying the synergistic stabilizer into the mixture C through the atomizer, and stirring for 5-10 minutes to obtain a mixture D;
(4) and (3) performing extrusion molding by a plunger type extruder to obtain the PEX pipe with high oxidation induction period.
8. The method for preparing PEX pipe with high oxidation induction period as claimed in claim 7, wherein the mass ratio of the antioxidant, the auxiliary antioxidant and the acetone in the step (2) is 1: 4.
9. The method for preparing PEX pipe with high oxidation induction period as claimed in claim 7, wherein the extruder extrusion parameters in step (4) are as follows: the temperature of the feeding section of the extruder is 90-110 ℃, the temperature of the connector is 150-.
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| CN115709555A (en) * | 2022-11-11 | 2023-02-24 | 宏岳塑胶集团股份有限公司 | Production process of crosslinked polyethylene PE-Xa (polyethylene-Xa) pipe and high-speed raw material mixer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276892A (en) * | 2011-05-24 | 2011-12-14 | 华东理工大学 | Method for preparing polyethylene pipe resin |
| CN105419062A (en) * | 2015-12-30 | 2016-03-23 | 天津军星管业集团有限公司 | Material for anti-aging peroxide crosslinking polyethylene pipe |
| CN106832503A (en) * | 2016-11-30 | 2017-06-13 | 陕西省石油化工研究设计院 | A kind of polyethylene crosslinking is modified the method for preparing special material for tube |
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2021
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276892A (en) * | 2011-05-24 | 2011-12-14 | 华东理工大学 | Method for preparing polyethylene pipe resin |
| CN105419062A (en) * | 2015-12-30 | 2016-03-23 | 天津军星管业集团有限公司 | Material for anti-aging peroxide crosslinking polyethylene pipe |
| CN106832503A (en) * | 2016-11-30 | 2017-06-13 | 陕西省石油化工研究设计院 | A kind of polyethylene crosslinking is modified the method for preparing special material for tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115709555A (en) * | 2022-11-11 | 2023-02-24 | 宏岳塑胶集团股份有限公司 | Production process of crosslinked polyethylene PE-Xa (polyethylene-Xa) pipe and high-speed raw material mixer |
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| CN113831627B (en) | 2023-08-29 |
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