CN102532634A - Preparation method of high-temperature-resisting oil-swelling sealing material - Google Patents
Preparation method of high-temperature-resisting oil-swelling sealing material Download PDFInfo
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- CN102532634A CN102532634A CN2010105921194A CN201010592119A CN102532634A CN 102532634 A CN102532634 A CN 102532634A CN 2010105921194 A CN2010105921194 A CN 2010105921194A CN 201010592119 A CN201010592119 A CN 201010592119A CN 102532634 A CN102532634 A CN 102532634A
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- butadiene rubber
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Abstract
The invention provides a preparation method of a sealing material, and in particular relates to a preparation method of a high-temperature-resisting oil-swelling sealing material. A hydrogenated chemigum rubber has high temperature resistance and ozonization resistance, and a polyurethane prepolymer rubber has abrasion resistance and swelling tightness, thus the core technology of the invention is as follows: the rubber formed by mixing and vulcanization has the high temperature resistance and ozonization resistance of the hydrogenated chemigum rubber and the abrasion resistance and swelling tightness of the polyurethane prepolymer rubber.
Description
Technical field
The present invention relates to a kind of preparation method of sealing material, be specifically related to a kind of high-temperature-rusistance oil Expansion sealing preparation methods.
Background technology
Paracril be two kinds of monomers of acrylonitrile and butadiene through a kind of random copolymers that radical-initiated polymerisation makes, contain unsaturated double-bond and polar group-CN in the molecular structure, make it anti-non-polar oil excellent property.At present, the good paracril of physical and mechanical properties is widely used in the sealing material of pumping equipment in oil production.
Along with China's modern industrialization process the propelling that deepens continuously, the demand of oil is grown with each passing day, oil production will more multiaspect be to Midwest fld and offshore oil and gas field, this also certainly will face more severe oil recovery environment.Though paracril oil resistant and physical and mechanical properties are all better, high thermal resistance is not good, has only 110-120 ℃, and the while is ozone proof property again, and wearability is not strong, needs periodic replacement sealing material goods.So; The development of satisfied Midwest now of paracril and offshore oil and gas field; The particularly proposition of high temperature high pressure deep well, ultra deep well thermal recovery oil tech more needs the excellent rubber packing material of a kind of high temperature high voltage resistant stopping property to solve the bottleneck of new oil recovery technique on sealing material.
Abroad begun in recent years to replace paracril, solved the defective of paracril non-refractory and easy oxidation with hydrogenated nitrile-butadiene rubber.It is good that hydrogenated nitrile-butadiene rubber is high temperature resistant, can in 150 ℃ of oily media, use, because two keys are by partially hydrogenated in the structure, scale resistance and physical and mechanical properties all improve greatly.At present, the usage quantity of hydrogenated nitrile-butadiene rubber has accounted for paracril usage quantity 20%, is not broken into ascendant trend, is considered to one of following specialty elastomer developing direction.But we need see that also also there are some defectives in present hydrogenated nitrile-butadiene rubber simultaneously, mainly are that the relative oil production environment of wear resistance and stopping property is strong not enough, and for some time uses the wearing and tearing back to influence the crude apparatus sealing effectiveness.This is very unfavorable to the stable exploitation dark, ultra deep well of sealing material life-time service and oil, still needs this two aspects defective of hydrogenated nitrile-butadiene rubber is improved.
Summary of the invention
The object of the present invention is to provide a kind of technology simple, preparation cost is low, and high-temperature-rusistance oil Expansion sealing preparation methods.
The objective of the invention is to be realized by following technical scheme: a kind of high-temperature-rusistance oil Expansion sealing preparation methods said method comprising the steps of:
1) plasticates: earlier hydrogenated nitrile-butadiene rubber is plasticated, obtain the hydrogenated nitrile-butadiene rubber dispersion-s;
2) mixing: hydrogenated nitrile-butadiene rubber dispersion-s and base polyurethane prepolymer for use as is mixing through row in the ratio between 1: 1 to 2: 1, and melting temperature is 40 ℃～70 ℃, obtains rubber unvulcanizate;
3) prevulcanized: rubber unvulcanizate is carried out prevulcanized, obtain work in-process, the said prevulcanized time is 20 minutes～30 minutes, and the temperature of said prevulcanized is 140 ℃～150 ℃, and the pressure of said prevulcanized is 10Mpa～20Mpa;
4) post vulcanization: through the row post vulcanization, the said post vulcanization time is 2 hours～3 hours with said work in-process, and the temperature of said post vulcanization is 160 ℃～180 ℃, and the pressure of said post vulcanization is 10Mpa～20Mpa, obtains finished product.
Hydrogenated nitrile-butadiene rubber has high temperature resistant ozone proof property; Base polyurethane prepolymer for use as rubber has wear resistance and Expansion sealing property, so technological core of the present invention is exactly around making the rubber that mixes sulfidization molding have the high temperature resistant ozone proof property of hydrogenated nitrile-butadiene rubber and the wear-resisting and Expansion sealing property of base polyurethane prepolymer for use as rubber concurrently.
Hydrogenated nitrile-butadiene rubber and base polyurethane prepolymer for use as rubber is polar functionalities all, all can be used as oil resisting rubber behind the cross moulding.The solubility parameters of hydrogenated nitrile-butadiene rubber is 8.5, and the solubility parameters of base polyurethane prepolymer for use as is 10.8, and both differ farther surface tension, and both mix most of incompatible.Under rational prescription and vulcanization system; It is inconsistent that both can be cross-linked to form tridimensional network by independent separately chemistry; The physical network IPN forms the IPN structure of microphase-separated each other again; Thereby combined hydrogenated nitrile-butadiene rubber and base polyurethane prepolymer for use as rubber good characteristic separately well, obtained the rubber packing material that high temperature resistant anti-ozone is wear-resisting and sealing property is superior.
Plasticating makes hydrogenated nitrile-butadiene rubber fragment into the short chain structure from backbone, and molecular weight reduces, and viscosity degradation is convenient to follow-up mixing.
The blending ratio that must control melting temperature and two rubber when mixing guarantees not autohemagglutination of base polyurethane prepolymer for use as, and mixing back hydrogenated nitrile-butadiene rubber, base polyurethane prepolymer for use as and Synergist S-421 95 should be finely dispersed on macroscopic view, have the microfacies subregion on the microcosmic each other.
Chemically crosslinked not taking place between hydrogenated nitrile-butadiene rubber and the urethanes, but nettedly separately run through each other, forms physics interpenetrating network system (IPN).The characteristics of IPN are that two networks have synergistic effect, and promptly the over-all properties of IPN surpasses the performance stack separately of two components, so that sealing article has is high temperature resistant, ozone proof, wear-resisting and excellent sealing property.In addition, the sneaking into of base polyurethane prepolymer for use as rubber, the water that a small amount of terminal isocyanate groups can make the sealing material goods meet in the crude oil expands, and in long-term oil recovery process, keeps the persistent stopping property of material product.
As preferably, in said mixing step, also to add Synergist S-421 95, said Synergist S-421 95 is scorch retarder, anti-aging agent, softening agent.
Embodiment
Through embodiment, do further bright specifically below to technical scheme of the present invention.But it can not be interpreted as it is limitation of the present invention.
Embodiment 1
A kind of high-temperature-rusistance oil Expansion sealing preparation methods said method comprising the steps of:
1) plasticates: earlier hydrogenated nitrile-butadiene rubber is plasticated, obtain the hydrogenated nitrile-butadiene rubber dispersion-s;
2) mixing: hydrogenated nitrile-butadiene rubber dispersion-s and base polyurethane prepolymer for use as is mixing through row in 1: 1 ratio, and melting temperature is 40 ℃, obtains rubber unvulcanizate;
3) prevulcanized: rubber unvulcanizate is carried out prevulcanized, obtain work in-process, the said prevulcanized time is 20 minutes, and the temperature of said prevulcanized is 140 ℃, and the pressure of said prevulcanized is 10Mpa;
4) post vulcanization: through the row post vulcanization, the said post vulcanization time is 2 hours with said work in-process, and the temperature of said post vulcanization is 160 ℃, and the pressure of said post vulcanization is 10Mpa, obtains finished product.
Also will add Synergist S-421 95 in the said mixing step, said Synergist S-421 95 is scorch retarder, anti-aging agent, softening agent.
The physical and chemical performance such as the table 1 of said finished product.
Table 1
Embodiment 2
A kind of high-temperature-rusistance oil Expansion sealing preparation methods said method comprising the steps of:
1) plasticates: earlier hydrogenated nitrile-butadiene rubber is plasticated, obtain the hydrogenated nitrile-butadiene rubber dispersion-s;
2) mixing: hydrogenated nitrile-butadiene rubber dispersion-s and base polyurethane prepolymer for use as is mixing through row in 2: 1 ratio, and melting temperature is 70 ℃, obtains rubber unvulcanizate;
3) prevulcanized: rubber unvulcanizate is carried out prevulcanized, obtain work in-process, the said prevulcanized time is 30 minutes, and the temperature of said prevulcanized is 150 ℃, and the pressure of said prevulcanized is 20Mpa;
4) post vulcanization: through the row post vulcanization, the said post vulcanization time is 3 hours with said work in-process, and the temperature of said post vulcanization is 180 ℃, and the pressure of said post vulcanization is 20Mpa, obtains finished product.
Also will add Synergist S-421 95 in the said mixing step, said Synergist S-421 95 is scorch retarder, anti-aging agent, softening agent.
The physical and chemical performance such as the table 1 of said finished product.
Table 1
| The oil high thermal resistance/℃ | 150-180 |
| Crude oil expansion multiplying power % | 150 |
| Ozone proof property/1000 * 10-8 * 20% * fate | 7 |
Claims (3)
1. high-temperature-rusistance oil Expansion sealing preparation methods is characterized in that: said method comprising the steps of:
1) plasticates: earlier hydrogenated nitrile-butadiene rubber is plasticated, obtain the hydrogenated nitrile-butadiene rubber dispersion-s;
2) mixing: hydrogenated nitrile-butadiene rubber dispersion-s and base polyurethane prepolymer for use as is mixing through row in the ratio between 1: 1 to 2: 1, and melting temperature is 40 ℃～70 ℃, obtains rubber unvulcanizate;
3) prevulcanized: rubber unvulcanizate is carried out prevulcanized, obtain work in-process, the said prevulcanized time is 20 minutes～30 minutes, and the temperature of said prevulcanized is 140 ℃～150 ℃, and the pressure of said prevulcanized is 10Mpa～20Mpa;
4) post vulcanization: through the row post vulcanization, the said post vulcanization time is 2 hours～3 hours with said work in-process, and the temperature of said post vulcanization is 160 ℃～180 ℃, and the pressure of said post vulcanization is 10Mpa～20Mpa, obtains finished product.
2. a kind of high-temperature-rusistance oil Expansion sealing preparation methods according to claim 1 is characterized in that: in said mixing step, also will add Synergist S-421 95.
3. a kind of high-temperature-rusistance oil Expansion sealing preparation methods according to claim 2, it is characterized in that: said Synergist S-421 95 is scorch retarder, anti-aging agent, softening agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010592119.4A CN102532634B (en) | 2010-12-09 | 2010-12-09 | Preparation method of high-temperature-resisting oil-swelling sealing material |
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| CN201010592119.4A CN102532634B (en) | 2010-12-09 | 2010-12-09 | Preparation method of high-temperature-resisting oil-swelling sealing material |
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| CN102532634A true CN102532634A (en) | 2012-07-04 |
| CN102532634B CN102532634B (en) | 2014-09-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107915986A (en) * | 2017-12-13 | 2018-04-17 | 马鞍山市荣亿密封材料有限责任公司 | A kind of high barrier is kneaded the preparation method of polyurethane nitrile rubber |
| CN107936330A (en) * | 2017-12-13 | 2018-04-20 | 马鞍山市荣亿密封材料有限责任公司 | A kind of preparation method of salt tolerant modified butadiene acrylonitrile rubber polyurethane resin vulcanizate sealing material |
| CN109054343A (en) * | 2018-07-16 | 2018-12-21 | 广东工业大学 | A kind of blended vulcanizate and preparation method thereof |
| CN110078986A (en) * | 2018-01-26 | 2019-08-02 | 中石化石油工程技术服务有限公司 | A kind of preparation method of difunctional expanded elastomers material |
| CN110746670A (en) * | 2018-07-24 | 2020-02-04 | 中石化石油工程技术服务有限公司 | Soluble hydrogenated butyronitrile rubber-plastic composite material and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915986A (en) * | 2017-12-13 | 2018-04-17 | 马鞍山市荣亿密封材料有限责任公司 | A kind of high barrier is kneaded the preparation method of polyurethane nitrile rubber |
| CN107936330A (en) * | 2017-12-13 | 2018-04-20 | 马鞍山市荣亿密封材料有限责任公司 | A kind of preparation method of salt tolerant modified butadiene acrylonitrile rubber polyurethane resin vulcanizate sealing material |
| CN110078986A (en) * | 2018-01-26 | 2019-08-02 | 中石化石油工程技术服务有限公司 | A kind of preparation method of difunctional expanded elastomers material |
| CN110078986B (en) * | 2018-01-26 | 2021-07-30 | 中石化石油工程技术服务有限公司 | Preparation method of difunctional expandable elastomer material |
| CN109054343A (en) * | 2018-07-16 | 2018-12-21 | 广东工业大学 | A kind of blended vulcanizate and preparation method thereof |
| CN109054343B (en) * | 2018-07-16 | 2021-01-26 | 广东工业大学 | Blended vulcanized rubber and preparation method thereof |
| CN110746670A (en) * | 2018-07-24 | 2020-02-04 | 中石化石油工程技术服务有限公司 | Soluble hydrogenated butyronitrile rubber-plastic composite material and preparation method thereof |
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| CN102532634B (en) | 2014-09-10 |
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