阅读说明：本技术 一种耐溶胀丁腈橡胶胶料及其制备方法、应用 (Swelling-resistant nitrile rubber material and preparation method and application thereof ) 是由 房光 詹升忠 董振刚 孙双 杨汉文 于 2020-05-06 设计创作，主要内容包括：本发明公开了一种耐溶胀丁腈橡胶胶料及其制备方法、应用,其特征在于,所述胶料组分包括：丁腈橡胶、氧化锌、硫磺、硬脂酸、防老剂、古马隆树脂、炭黑、醚酯增塑剂、促进剂、白炭黑及硅烷偶联剂；所述丁腈橡胶为N220s,所述氧化锌为AZO808,所述硬脂酸为AC1801,所述防老剂包括TMQ及4010NA,所述炭黑为N330,所述醚酯增塑剂为TP95,所述促进剂包括MBTS及TBBS,所述白炭黑为1165MP,所述硅烷偶联剂为Si69；解决采油螺杆泵定子的内衬材料的溶胀率普遍高于5%的问题。(The invention discloses a swelling-resistant nitrile rubber compound and a preparation method and application thereof, and is characterized in that the compound comprises the following components: nitrile butadiene rubber, zinc oxide, sulfur, stearic acid, an anti-aging agent, coumarone resin, carbon black, an ether ester plasticizer, an accelerator, white carbon black and a silane coupling agent; the nitrile rubber is N220s, the zinc oxide is AZO808, the stearic acid is AC1801, the anti-aging agent comprises TMQ and 4010NA, the carbon black is N330, the ether ester plasticizer is TP95, the accelerator comprises MBTS and TBBS, the white carbon black is 1165MP, and the silane coupling agent is Si 69; the problem that the swelling rate of lining materials of the oil extraction screw pump stator is generally higher than 5% is solved.)

1. A swelling-resistant nitrile rubber compound, comprising:

nitrile butadiene rubber, zinc oxide, sulfur, stearic acid, an anti-aging agent, coumarone resin, carbon black, an ether ester plasticizer, an accelerator, white carbon black and a silane coupling agent.

2. The swelling-resistant nitrile rubber compound according to claim 1, wherein:

the nitrile rubber is N220S, the zinc oxide is AZO808, the sulfur is 325 meshes, the stearic acid is AC1801, the anti-aging agent comprises TMQ and 4010NA, the carbon black is N330, the ether ester plasticizer is TP95, the accelerator comprises MBTS and TBBS, the white carbon black is 1165MP, and the silane coupling agent is Si 69.

3. The swelling-resistant nitrile rubber compound according to claim 2, wherein the components are, in parts by mass:

the nitrile rubber N220 s: 100 parts of (A);

the zinc oxide AZO 808: 3-6 parts;

the stearic acid AC 1801: 1-2 parts;

the 325-mesh sulfur: 1.5-3 parts;

1-2 parts of an anti-aging agent TMQ;

1-2 parts of an anti-aging agent 4010 NA;

the coumarone resin: 3-5 parts;

45-55 parts of carbon black N330;

5-10 parts of an ether ester plasticizer TP 95;

1-2 parts of accelerator MBTS;

0.5-1.5 parts of accelerator TBBS;

3-5 parts of white carbon black 1165 MP;

1-2 parts of silane coupling agent Si 69.

4. A swelling-resistant nitrile rubber compound according to claim 2 or 3, wherein:

the acrylonitrile-butadiene rubber N220s had an acrylonitrile content of 41% and an initial Mooney viscosity of 56(100 ℃).

5. The preparation method of the swelling-resistant nitrile rubber compound comprises the steps of feeding, and is characterized in that:

the feeding step comprises the steps of uniformly mixing the nitrile rubber and the coumarone resin to obtain a first uniform mixture;

adding the zinc oxide, the stearic acid and the sulfur into the first uniform mixture, and uniformly mixing to obtain a second uniform mixture;

adding the anti-aging agent, the silane coupling agent and the white carbon black into the second uniform mixture, and uniformly mixing to obtain a third uniform mixture;

adding the carbon black and the ether ester plasticizer into the third uniform mixture, and uniformly mixing to obtain a fourth uniform mixture;

preparing the fourth uniformly mixed substance into a flaky rubber material;

adding the accelerator into the flaky rubber material, and then carrying out secondary banburying to obtain a fifth uniform mixture;

and preparing the fifth mixed substance into a finished flaky rubber material.

6. The process for the preparation of a swelling-resistant nitrile rubber compound according to claim 5, wherein:

the mixing is carried out in a kneading chamber of a rubber internal mixer.

7. Process for the preparation of a swelling-resistant nitrile rubber compound according to claim 5 or 6, characterized in that:

and (3) on an open mill, roll-coating and mixing the fourth mixture to prepare the flaky rubber material.

8. The process for the preparation of a swelling-resistant nitrile rubber compound according to claim 7, wherein:

standing the flaky sizing material for more than 16h at room temperature.

9. The process for the preparation of a swelling-resistant nitrile rubber compound according to claim 8, wherein:

and (3) performing roll-coating mixing and triangular bag-making on the fifth uniformly-mixed material for 2 times on an open mill, and then performing roll-coating mixing to prepare the finished flaky rubber material.

10. An application of swelling-resistant nitrile rubber sizing material in a screw pump stator lining material.

Technical Field

The invention relates to a nitrile rubber compound, in particular to a nitrile rubber compound formula applied to manufacturing of an oil extraction screw pump stator rubber lining and a preparation method thereof.

Background

The screw pump for oil extraction in oil field consists of stator, rotor and other parts, and the stator consists of metal barrel and rubber lining adhered to the inner wall of the barrel. The rubber lining is a vulnerable key part of the oil extraction screw pump, and the swelling resistance of the rubber lining directly influences the volume efficiency and the service life of the screw pump in the well.

At present, researches on the formula of the rubber material of the stator of the screw pump for oil extraction are not much, the rubber stator commonly used in oil fields has the limitation that the rubber stator is not resistant to composite flooding media such as polymers, alkali, surfactants and the like, and the swelling ratio of a rubber lining after long-term operation is generally higher than 5 percent, so that the rubber lining is difficult to adapt to the continuous change of the oil displacement media in the underground oil extraction of the oil fields.

Disclosure of Invention

In view of the above, the invention provides a swelling-resistant nitrile rubber compound, which solves the problem that the swelling rate of the lining material of the existing screw pump stator is generally higher than 5%.

In addition, the invention also provides a preparation method of the swelling-resistant nitrile rubber compound.

Furthermore, the invention also provides application of the swelling-resistant nitrile rubber material as a screw pump stator lining material.

In a first aspect, the swelling-resistant nitrile rubber compound is characterized by comprising the following components:

nitrile butadiene rubber, zinc oxide, sulfur, stearic acid, an anti-aging agent, coumarone resin, carbon black, an ether ester plasticizer, an accelerator, white carbon black and a silane coupling agent.

Preferably, the nitrile rubber is N220S, the zinc oxide is AZO808, the sulfur is 325 meshes, the stearic acid is AC1801, the anti-aging agent comprises TMQ and 4010NA, the carbon black is N330, the ether ester plasticizer is TP95, the accelerator comprises MBTS and TBBS, the white carbon black is 1165MP, and the silane coupling agent is Si 69.

Preferably, the components are as follows according to parts by mass:

the nitrile rubber N220 s: 100 parts of (A);

the zinc oxide AZO 808: 3-6 parts;

the stearic acid AC 1801: 1-2 parts;

the 325-mesh sulfur: 1.5-3 parts;

1-2 parts of an anti-aging agent TMQ;

1-2 parts of an anti-aging agent 4010 NA;

the coumarone resin: 3-5 parts;

45-55 parts of carbon black N330;

5-10 parts of an ether ester plasticizer TP 95;

1-2 parts of accelerator MBTS;

0.5-1.5 parts of accelerator TBBS;

3-5 parts of white carbon black 1165 MP;

1-2 parts of silane coupling agent Si 69.

Preferably, the nitrile rubber N220s has an acrylonitrile content of 41% and an initial Mooney viscosity of 56(100 ℃).

In a second aspect, the preparation method of the swelling-resistant nitrile rubber compound comprises the steps of feeding materials, and is characterized in that:

the feeding step comprises the steps of uniformly mixing the nitrile rubber and the coumarone resin to obtain a first uniform mixture;

adding the zinc oxide, the stearic acid and the sulfur into the first uniform mixture, and uniformly mixing to obtain a second uniform mixture;

adding the anti-aging agent, the silane coupling agent and the white carbon black into the second uniform mixture, and uniformly mixing to obtain a third uniform mixture;

adding the carbon black and the ether ester plasticizer into the third uniform mixture, and uniformly mixing to obtain a fourth uniform mixture;

preparing the fourth uniformly mixed substance into a flaky rubber material;

adding the accelerator into the flaky rubber material, and then carrying out secondary banburying to obtain a fifth uniform mixture;

and preparing the fifth mixed substance into a finished flaky rubber material.

Preferably, the mixing is carried out in the kneading chamber of a rubber internal mixer.

Preferably, the fourth blend is roll-mixed on an open mill to prepare the sheet-shaped rubber compound.

Preferably, the sheet-like size is left to stand at room temperature for more than 16 h.

Preferably, on an open mill, performing roll-coating mixing and triangular bag-making on the fifth mixture for 2 times, and then performing roll-coating mixing to obtain the finished flaky rubber material.

In a third aspect, the swelling-resistant nitrile rubber compound is applied to a screw pump stator lining material.

The swelling-resistant nitrile rubber compound is prepared into the screw pump stator lining material through injection molding and vulcanization.

The invention has the following beneficial effects:

the swelling-resistant nitrile rubber compound has excellent medium resistance, is tested to be soaked for 336h in oil field polymer flooding well fluid at a constant temperature of 70 ℃ in a water bath, the volume swelling rate is below 3.80 percent, no cracking phenomenon is generated, the swelling rate of a screw pump rubber lining in a composite flooding well condition can be controlled in a proper range, and Mooney viscosity and vulcanization characteristic parameters can meet the injection molding use requirement of screw pump stator manufacturing, so that the swelling-resistant nitrile rubber compound is particularly suitable for the injection molding requirement of a stator pipe with equal wall thickness, and the service life of an oil extraction screw pump is prolonged.

Detailed Description

The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.