CN111117135A - Silane crosslinked cable material for oil well and preparation method thereof - Google Patents
Silane crosslinked cable material for oil well and preparation method thereof Download PDFInfo
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- CN111117135A CN111117135A CN201911327289.7A CN201911327289A CN111117135A CN 111117135 A CN111117135 A CN 111117135A CN 201911327289 A CN201911327289 A CN 201911327289A CN 111117135 A CN111117135 A CN 111117135A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The invention discloses a silane crosslinked cable material for an oil well, which is characterized by comprising the following components in parts by weight: 50 parts of polyethylene; 40-60 parts of polypropylene; 10-20 parts of a compatilizer; 1-3 parts of a crosslinking agent; 0.5-2 parts of an initiator; 3-5 parts of a catalyst; 1-3 parts of an antioxidant. The invention also discloses a preparation method of the composition. The cable material can meet the use condition of 105 ℃ temperature resistance grade, the tensile strength can reach more than 35Mpa, the elongation rate reaches 300%, meanwhile, the cable material has the characteristics of corrosion resistance, oil resistance and the like, the cross-linking thermal elongation is less than or equal to 80%, and the standard of oil well wires is met.
Description
Technical Field
The invention relates to the field of preparation of insulated cable materials, in particular to a silane crosslinked cable material for an oil well and a preparation method thereof.
Background
With the increasing living standard and the increasing national demand for oil, people find that the temperature of transmission cables is higher and higher as the power of a motor is larger and larger in the process of exploitation, and the traditional cable with the temperature resistance level of 90 ℃ cannot meet the requirement.
Meanwhile, the cable material is dissolved by petroleum and the corrosivity of the corresponding corrosive by-product to the cable is more serious along with the exploitation process, so that the petroleum exploitation industry continues to be a cable material which can meet the existing requirements of high strength and the like and has the characteristics of corrosion resistance and high temperature resistance level.
Disclosure of Invention
In order to overcome the above-mentioned defects of the prior art, one of the objects of the present invention is to provide a silane crosslinked cable material for oil wells.
The second purpose of the invention is to provide a preparation method of the silane crosslinked cable material for oil wells.
In order to realize one of the purposes of the invention, the adopted technical scheme is as follows:
a silane crosslinked cable material for oil wells comprises the following components in parts by weight:
50 parts of polyethylene;
40-60 parts of polypropylene;
10-20 parts of a compatilizer;
1-3 parts of a crosslinking agent;
0.5-2 parts of an initiator;
3-5 parts of a catalyst;
1-3 parts of an antioxidant.
In a preferred embodiment of the present invention, the polyethylene is linear low density polyethylene which is any one or more of linear low density polyethylene, low density polyethylene or medium density polyethylene; the melt index of the polyethylene is 1-10g/10min at the temperature of 190 ℃ and under the load of 2.16 KG. Preferably 2g/10 min.
In a preferred embodiment of the present invention, the polypropylene is any one or more of block polypropylene or homo-polypropylene. Preferably 50 parts of polypropylene. Polypropylene does not participate in the crosslinking reaction, but its higher rigidity provides the formulation with an indication of high strength and high hardness.
In a preferred embodiment of the invention, the compatibilizer is a mixture of ethylene octene copolymer (POE) and polyethylene plastomer (POP).
In a preferred embodiment of the invention, the compatibilizer is a mixture of ethylene octene copolymer (POE) and polyethylene plastomer (POP) in a ratio of 1:4 to 1: 9. The preferred ratio is 1:7, and the compatibilizer functions to increase the degree of crosslinking of the silane crosslinking while increasing the compatibility between the polyethylene and the polypropylene when the polypropylene does not participate in the reaction.
In a preferred embodiment of the present invention, the crosslinking agent is any one or more of vinyltrimethoxysilane (A-171), vinyltriethoxysilane (A-151) or vinyltris (b-methoxyethoxy) silane (A-172).
In a preferred embodiment of the present invention, the initiator is a mixture of DCP and tert-butyl peroxybenzoate, and the mixing ratio is 1: 1-4:1. The preferred mixing ratio is 3: 1.
in a preferred embodiment of the present invention, the catalyst is dibutyltin dilaurate.
In a preferred embodiment of the present invention, the antioxidant is any one or more of 4,4' -thiobis (6-tert-butyl-3-methylphenol) (antioxidant No. 300), dilauryl thiodipropionate (antioxidant DLTP) or tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168).
In order to realize the second purpose of the invention, the adopted technical scheme is as follows:
a preparation method of silane crosslinked cable material for oil wells comprises the following steps:
mixing the compatilizers and then extruding and granulating at the temperature of 110-150 ℃;
uniformly mixing the initiator, adding the polyethylene, the polypropylene, the granulated compatilizer and the antioxidant, and mixing at the temperature of 110-200 ℃ until the materials are completely plasticized to obtain a silane cross-linked resin master batch A;
and mixing the silane crosslinking resin master batch A, the catalyst and the initiator at the temperature of 70-90 ℃ for 60-120 min until liquid is completely absorbed by the master batch to obtain the cable material.
The invention has the beneficial effects that:
the cable material can meet the use condition of 105 ℃ temperature resistance grade, the tensile strength can reach more than 35Mpa, the elongation rate reaches 300%, meanwhile, the cable material has the characteristics of corrosion resistance, oil resistance and the like, the cross-linking thermal elongation is less than or equal to 80%, and the standard of oil well wires is met.
Detailed Description
The main principle of the invention is as follows:
the invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental methods of the following examples, which are not specified under specific conditions, are generally determined according to national standards. If there is no corresponding national standard, it is carried out according to the usual international standards, to the conventional conditions or to the conditions recommended by the manufacturer. Unless otherwise indicated, all parts are parts by weight, all percentages are percentages by weight, and the molecular weight of the polymer is the number average molecular weight.
Unless defined or stated otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention.
Examples
The present invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Example 1
The embodiment provides a silane crosslinked cable material for an oil well and a preparation method thereof, wherein the cable material is prepared from the following raw materials:
the preparation method of the cable material of the embodiment comprises the following steps:
1) uniformly mixing the compatilizer POE and POP resin by using a stirrer, and then putting the mixture into a double-screw extruder at the temperature of 110-150 ℃ for extrusion granulation;
2) uniformly mixing the initiator according to a specified proportion by using a liquid stirrer;
3) adding polyethylene, polypropylene, a granulated compatilizer and an antioxidant into a double-screw extruder in a weightless weighing mode according to a ratio, mixing at a processing temperature of 110-200 ℃ until the materials are completely plasticized, and obtaining a silane cross-linked resin master batch A;
4) and putting the resin master batch A, the catalyst and the initiator into a mixing tank according to a specified proportion, wherein the temperature of the mixing tank is 70-90 ℃, and the mixing time is 60-120 min until all liquid is absorbed by the master batch, so as to obtain the silane crosslinking insulating material.
Example 2
The embodiment provides a silane crosslinked cable material for an oil well and a preparation method thereof, wherein the cable material is prepared from the following raw materials:
the preparation method of the cable material of the embodiment comprises the following steps:
1) uniformly mixing the compatilizer POE and POP resin by using a stirrer, and then putting the mixture into a double-screw extruder at the temperature of 110-150 ℃ for extrusion granulation;
2) uniformly mixing the initiator according to a specified proportion by using a liquid stirrer;
3) adding polyethylene, polypropylene, a granulated compatilizer and an antioxidant into a double-screw extruder in a weightless weighing mode according to a ratio, mixing at a processing temperature of 110-200 ℃ until the materials are completely plasticized, and obtaining a silane cross-linked resin master batch A;
4) and putting the resin master batch A, the catalyst and the initiator into a mixing tank according to a specified proportion, wherein the temperature of the mixing tank is 70-90 ℃, and the mixing time is 60-120 min until all liquid is absorbed by the master batch, so as to obtain the silane crosslinking insulating material.
Example 3
The embodiment provides a silane crosslinked cable material for an oil well and a preparation method thereof, wherein the cable material is prepared from the following raw materials:
the preparation method of the cable material of the embodiment comprises the following steps:
1) uniformly mixing the compatilizer POE and POP resin by using a stirrer, and then putting the mixture into a double-screw extruder at the temperature of 110-150 ℃ for extrusion granulation;
2) uniformly mixing the initiator according to a specified proportion by using a liquid stirrer;
3) adding polyethylene, polypropylene, a granulated compatilizer and an antioxidant into a double-screw extruder in a weightless weighing mode according to a ratio, mixing at a processing temperature of 110-200 ℃ until the materials are completely plasticized, and obtaining a silane cross-linked resin master batch A;
4) and putting the resin master batch A, the catalyst and the initiator into a mixing tank according to a specified proportion, wherein the temperature of the mixing tank is 70-90 ℃, and the mixing time is 60-120 min until all liquid is absorbed by the master batch, so as to obtain the silane crosslinking insulating material.
Comparative example 1
The comparative example is a traditional insulated cable material for oil wells
Comparative example 2
This comparative example is a silane crosslinked cable material without the compatibilizer and initiator of the invention
50 parts of linear low-density polyethylene;
the comparative example adopts the traditional twin-screw granulation process, powder, resin and liquid in specified proportion are added into a screw by a weightlessness scale, and the extrusion temperature of the screw is 110 ℃ to 180 ℃.
Comparative example 3
The comparative example uses POE \ POP mixed compatilizer and compound crosslinking assistant, but does not adopt the silane crosslinking cable material with the proportion provided by the invention.
The data of the examples and comparative examples obtained according to the test method of oil well GB/3470 are shown in Table 1 below, wherein comparative examples 1 and 2 are the formulations of the existing oil well cables:
TABLE 1
The result shows that the compatilizer and the initiator can solve the problems of oil resistance and corrosion resistance of the existing oil well cable.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the scope of the invention, which is defined by the claims appended hereto, and any other technical entity or method that is encompassed by the claims as broadly defined herein, or equivalent variations thereof, is contemplated as being encompassed by the claims.
Although numerical ranges and parameters setting forth the invention are approximate, the numerical values set forth in the specific examples are presented as precisely as possible. Any numerical value, however, inherently contains certain standard deviations found in their respective testing measurements. As used herein, "about" generally means that the actual value is within plus or minus 10%, 5%, 1%, or 0.5% of a particular value or range. Alternatively, the term "about" means that the actual value falls within the acceptable standard error of the mean, as considered by those skilled in the art. Except in the experimental examples, or where otherwise expressly indicated, it is to be understood that all ranges, amounts, values and percentages herein used (e.g., to describe amounts of materials, length of time, temperature, operating conditions, quantitative ratios, and the like) are to be modified by the word "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained. At the very least, these numerical parameters are to be understood as meaning the number of significant digits recited and the number resulting from applying ordinary carry notation.
Unless otherwise specified, the starting materials of the present invention are commercially available; or prepared according to conventional methods in the art. Unless defined or stated otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention.
Claims (10)
1. The silane crosslinked cable material for the oil well is characterized by comprising the following components in parts by weight:
50 parts of polyethylene;
40-60 parts of polypropylene;
10-20 parts of a compatilizer;
1-3 parts of a crosslinking agent;
0.5-2 parts of an initiator;
3-5 parts of a catalyst;
1-3 parts of an antioxidant.
2. The silane crosslinked cable material for oil wells according to claim 1, wherein the polyethylene is linear low density polyethylene which is any one or more of linear low density polyethylene, low density polyethylene or medium density polyethylene; the melt index of the polyethylene is 1-10g/10min at the temperature of 190 ℃ and under the load of 2.16 KG.
3. The silane-crosslinked cable material for oil wells according to claim 1, wherein the polypropylene is any one or more of block polypropylene or homo-polypropylene.
4. The silane-crosslinked cable material for oil wells according to claim 1, wherein the compatibilizer is a mixture of an ethylene octene copolymer and a polyethylene plastomer.
5. The silane-crosslinked cable material for oil wells according to claim 1, wherein the compatibilizer is a mixture of an ethylene octene copolymer and a polyethylene plastomer in a ratio of 1:4 to 1: 9.
6. The silane crosslinked cable material for oil wells according to claim 1, wherein the crosslinking agent is any one or more of vinyltrimethoxysilane, vinyltriethoxysilane or vinyltris (b-methoxyethoxy) silane.
7. The silane-crosslinked cable material for oil wells according to claim 1, wherein the initiator is a mixture of DCP and tert-butyl peroxybenzoate, and the mixing ratio is 1: 1-4:1.
8. The silane crosslinked cable material for oil wells according to claim 1, wherein the catalyst is dibutyltin dilaurate.
9. The silane-crosslinked cable material for oil wells according to claim 1, wherein the antioxidant is any one or more of 4,4' -thiobis (6-tert-butyl-3-methylphenol), dilauryl thiodipropionate, or tris [2, 4-di-tert-butylphenyl ] phosphite.
10. The method for preparing the silane-crosslinked cable material for oil wells according to any one of claims 1 to 9, comprising the steps of:
mixing the compatilizers and then extruding and granulating at the temperature of 110-150 ℃;
uniformly mixing the initiator, adding the polyethylene, the polypropylene, the granulated compatilizer and the antioxidant, and mixing at the temperature of 110-200 ℃ until the materials are completely plasticized to obtain a silane cross-linked resin master batch A;
and mixing the silane crosslinking resin master batch A, the catalyst and the initiator at the temperature of 70-90 ℃ for 60-120 min until liquid is completely absorbed by the master batch to obtain the cable material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911327289.7A CN111117135A (en) | 2019-12-20 | 2019-12-20 | Silane crosslinked cable material for oil well and preparation method thereof |
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| CN201911327289.7A CN111117135A (en) | 2019-12-20 | 2019-12-20 | Silane crosslinked cable material for oil well and preparation method thereof |
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| CN111117135A true CN111117135A (en) | 2020-05-08 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109438808A (en) * | 2018-10-30 | 2019-03-08 | 江苏德威新材料股份有限公司 | Heating cable organosilane crosslinked polyethylene insulation material and its preparation method and application |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109438808A (en) * | 2018-10-30 | 2019-03-08 | 江苏德威新材料股份有限公司 | Heating cable organosilane crosslinked polyethylene insulation material and its preparation method and application |
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Effective date of registration: 20210707 Address after: 201100 Building 5, 268 beihengshahe Road, Minhang District, Shanghai Applicant after: Shanghai Zhizheng New Material Co.,Ltd. Address before: 5050 Yuanjiang Road, Xinzhuang Industrial Zone, Minhang District, Shanghai 201108 Applicant before: SHANGHAI ORIGINALDOW ADVANCED COMPOUNDS Co.,Ltd. |
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Application publication date: 20200508 |