CN112852033A - High-pressure-resistant low-temperature-resistant rubber composition and preparation method thereof - Google Patents
High-pressure-resistant low-temperature-resistant rubber composition and preparation method thereof Download PDFInfo
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- CN112852033A CN112852033A CN202110098720.6A CN202110098720A CN112852033A CN 112852033 A CN112852033 A CN 112852033A CN 202110098720 A CN202110098720 A CN 202110098720A CN 112852033 A CN112852033 A CN 112852033A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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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- Sealing Material Composition (AREA)
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Abstract
The invention discloses a high-pressure-resistant low-temperature-resistant rubber composition and a preparation method thereof, which relate to the technical field of rubber and are prepared from the following raw materials in parts by weight: 80-120 parts of nitrile-butadiene rubber, 45-65 parts of reinforcing agent, 10-20 parts of softening agent, 7.5-11.5 parts of compounding agent and 3-4 parts of vulcanization accelerator; the novel rubber is prepared by taking the nitrile rubber as a main material and 4 functional additives as auxiliary materials, has high elasticity and resilience and small thermal shrinkage effect, does not contain free sulfur, is high in safety and environmental protection, has good low-temperature resistance, can meet the use requirement in severe cold weather, and is particularly suitable for being used as a processing material of a rubber sealing element of an air compressor.
Description
Technical Field
The invention relates to the technical field of rubber, in particular to a high-pressure-resistant low-temperature-resistant rubber composition and a preparation method thereof.
Background
An air compressor is a device for compressing gas. The air compressor is similar to a water pump in structure, is widely applied and can be divided into the following parts according to the purposes: refrigerator compressors, air conditioning compressors, refrigeration compressors, compressors for tire inflation, and the like.
In recent years, rubber materials used for manufacturing the sealing parts of the compressors are not limited to have small thermal expansion, good elasticity and proper mechanical strength, but more requirements are made on good environmental protection and low temperature resistance, so that the sealing parts made of the rubber can still have good sealing effect in severe cold weather.
Disclosure of Invention
The invention provides a high-pressure-resistant low-temperature-resistant rubber composition and a preparation method thereof, aiming at the defects in the background art.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the high-pressure-resistant low-temperature-resistant rubber composition is prepared from the following raw materials in parts by weight: 80-120 parts of nitrile-butadiene rubber, 45-65 parts of reinforcing agent, 10-20 parts of softening agent, 7.5-11.5 parts of compounding agent and 3-4 parts of vulcanization accelerator.
Further, the reinforcing agent is a mixture of carbon black N550, carbon black N774 and white carbon black 255 according to the weight part ratio of 30-50:30-40: 4-6.
Furthermore, dioctyl adipate and dioctyl adipate are selected as the low-temperature plasticizer of the synthetic rubber as the softener.
Further, the compounding agent is a mixture of zinc oxide ZNO, stearic acid ester SA antioxidant RD and antioxidant 4010 in a weight portion ratio of 4-6:0.5-1.5:1-3: 1-2.
Further, the vulcanization accelerator is a mixture of a vulcanizing agent S-80H, an accelerator CZ and an accelerator TT according to the weight part ratio of 0.5-1.5:1-1.5: 1-1.5.
Further, the preparation method of the high-pressure-resistant and low-temperature-resistant rubber composition comprises the following steps:
s1, mixing: firstly, introducing water into an internal mixer for preheating, selecting a proper amount of nitrile rubber in proportion to be added into the internal mixer, then starting the internal mixer, mixing for 50-70 seconds, putting the compounding agent into the internal mixer for mixing for 25-35 seconds, then slowly adding a proper amount of reinforcing agent and softening agent in proportion into the internal mixer, uniformly stirring the mixture, discharging the rubber through a rubber discharge port of the internal mixer when the internal temperature of the internal mixer rises to 140 ℃ of 120-;
s2, two-stage mixing: and putting the rubber in the first section after standing for 24 hours into an internal mixer, adding a vulcanization accelerator for internal mixing for 160-plus-200 seconds, discharging the rubber through a rubber discharge port of the internal mixer, and then thinly passing the discharged rubber through an open mill for rubber mixing for 110-plus-130 seconds, discharging, cooling and packaging to obtain the high-pressure-resistant and low-temperature-resistant rubber composition.
The invention has the following beneficial effects:
the novel rubber is prepared by taking the nitrile rubber as a main material and 4 functional additives as auxiliary materials, has high elasticity and resilience and small thermal shrinkage effect, does not contain free sulfur, is high in safety and environmental protection, has good low-temperature resistance, can meet the use requirement in severe cold weather, and is particularly suitable for being used as a processing material of a rubber sealing element of an air compressor.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The nitrile rubber N240S in the following examples was from Japanese JSR, nitrile rubber NBR2865 from Zhengjiang Nadi, carbon black N550 from Longxing chemical Co., Ltd, carbon black N774 from Longxing chemical Co., Ltd, white carbon 255 from Nanji chemical Co., Ltd, dioctyl adipate as a softening agent from Kunshima, zinc oxide ZNO from New metals Co., Ltd, stearate SA from Hangzhou grease chemical Co., Ltd, antioxidant RD and antioxidant 4010 from China petrochemical Co., vulcanizer S-80H from Sichuan Antai rubber, accelerator CZ and accelerator TT from Yanggu Huatai Co., Ltd.
Example 1
A high-pressure-resistant low-temperature-resistant rubber composition is prepared from the following raw materials in parts by weight: 70 parts of butadiene acrylonitrile rubber N240S, 30 parts of butadiene acrylonitrile rubber NBR2865, 40 parts of carbon black N550, 40 parts of carbon black N774, 5 parts of carbon black 255, 15 parts of dioctyl adipate, 5 parts of zinc oxide ZNO, 1 part of stearic acid ester SA, 2 parts of industrial anti-aging agent RD, 1.5 parts of anti-aging agent 4010, 0.8 part of vulcanizing agent S-80H, 1.3 parts of accelerator CZ and 1.3 parts of accelerator TT.
The preparation method of the high-pressure-resistant low-temperature-resistant rubber composition comprises the following steps:
s1, mixing: the method comprises the steps of firstly introducing water into an internal mixer for preheating, then adding 70 parts of nitrile rubber N240S and 30 parts of nitrile rubber NBR2865 into the internal mixer, then starting the internal mixer, after mixing for 60 seconds, putting 5 parts of zinc oxide ZNO, 1 part of stearic acid ester SA, 2 parts of industrial anti-aging agent RD and 1.5 parts of anti-aging agent 4010 into the internal mixer for mixing for 30 seconds, then slowly adding 40 parts of carbon black N550, 40 parts of carbon black N774, 5 parts of carbon black 255 and 15 parts of dioctyl adipate into the internal mixer, uniformly stirring the mixture, discharging rubber through a rubber discharge port of the internal mixer when the internal temperature of the internal mixer rises to 130 ℃, and then placing the discharged rubber for 24 hours after the rubber is split by an open mill to obtain a section of rubber.
S2, two-stage mixing: and putting the rubber in the first section after standing for 24 hours into an internal mixer, adding 0.8 part of vulcanizing agent S-80H, 1.3 parts of accelerator CZ and 1.3 parts of accelerator TT, carrying out internal mixing for 180 seconds, carrying out rubber discharge through a rubber discharge port of the internal mixer, thinly turning the discharged rubber by using an open mill for 120 seconds, discharging, cooling and packaging to obtain the high-pressure-resistant and low-temperature-resistant rubber composition.
Example 2
A high-pressure-resistant low-temperature-resistant rubber composition is prepared from the following raw materials in parts by weight: 60 parts of butadiene acrylonitrile rubber N240S, 20 parts of butadiene acrylonitrile rubber NBR2865, 30 parts of carbon black N550, 30 parts of carbon black N774, 4 parts of carbon black 255, 10 parts of dioctyl adipate, 4 parts of zinc oxide ZNO, 0.5 part of hard acid ester SA, 1 part of industrial anti-aging agent RD, 1 part of anti-aging agent 4010, 0.5 part of vulcanizing agent S-80H, 1 part of accelerator CZ and 1 part of accelerator TT.
The preparation method of the high-pressure-resistant low-temperature-resistant rubber composition comprises the following steps:
s1, mixing: the method comprises the steps of firstly, introducing water into an internal mixer for preheating, then adding 60 parts of nitrile rubber N240S and 20 parts of nitrile rubber NBR2865 into the internal mixer, then starting the internal mixer, after mixing for 60 seconds, putting 4 parts of zinc oxide ZNO, 0.5 part of stearic acid ester SA, 1 part of industrial antioxidant RD and 1 part of antioxidant 4010 into the internal mixer for mixing for 30 seconds, then slowly adding 30 parts of carbon black N550, 30 parts of carbon black N774, 4 parts of carbon black 255 and 10 parts of dioctyl adipate into the internal mixer, uniformly stirring the mixture, discharging rubber through a rubber discharge port of the internal mixer when the internal temperature of the internal mixer rises to 120 ℃, and then placing the discharged rubber for 24 hours after the discharged rubber is subjected to sheet opening of an open mill to obtain a section of rubber.
S2, two-stage mixing: and putting the rubber in the first section after standing for 24 hours into an internal mixer, adding 0.5 part of vulcanizing agent S-80H, 1 part of accelerator CZ and 1 part of accelerator TT, carrying out internal mixing for 160 seconds, carrying out rubber discharge through a rubber discharge port of the internal mixer, then thinly turning the discharged rubber by using an open mill for 110 seconds, discharging, cooling and packaging to obtain the high-pressure-resistant and low-temperature-resistant rubber composition.
Example 3
A high-pressure-resistant low-temperature-resistant rubber composition is prepared from the following raw materials in parts by weight: 80 parts of butadiene acrylonitrile rubber N240S, 40 parts of butadiene acrylonitrile rubber NBR2865, 50 parts of carbon black N550, 50 parts of carbon black N774, 6 parts of carbon black 255, 20 parts of dioctyl adipate, 6 parts of zinc oxide ZNO, 1.5 parts of hard acid ester SA, 3 parts of industrial anti-aging agent RD, 2 parts of anti-aging agent 4010, 1 part of vulcanizing agent S-80H, 1.5 parts of accelerator CZ and 1.5 parts of accelerator TT.
The preparation method of the high-pressure-resistant low-temperature-resistant rubber composition comprises the following steps:
s1, mixing: firstly, introducing water into an internal mixer for preheating, then adding 80 parts of nitrile rubber N240S and 40 parts of nitrile rubber NBR2865 into the internal mixer, then starting the internal mixer, after mixing for 60 seconds, adding 6 parts of zinc oxide ZNO, 1.5 parts of stearic acid ester SA, 3 parts of industrial anti-aging agent RD and 2 parts of anti-aging agent 4010 into the internal mixer for mixing for 30 seconds, then slowly adding 30 parts of carbon black N550, 30 parts of carbon black N774, 4 parts of carbon black 255 and 10 parts of dioctyl adipate into the internal mixer, uniformly stirring the mixture, discharging rubber through a rubber discharge port of the internal mixer when the internal temperature of the internal mixer rises to 140 ℃, and then placing the discharged rubber for 24 hours after the discharged rubber is subjected to sheet opening by an open mill to obtain a section of rubber.
S2, two-stage mixing: and putting the rubber in the first section after standing for 24 hours into an internal mixer, adding 1 part of vulcanizing agent S-80H, 1.5 parts of accelerator CZ and 1.5 parts of accelerator TT, carrying out internal mixing for 200 seconds, discharging the rubber through a rubber discharge port of the internal mixer, thinly turning the discharged rubber by using an open mill for 130 seconds, discharging, cooling and packaging to obtain the high-pressure-resistant and low-temperature-resistant rubber composition.
The novel rubber is prepared by taking the nitrile rubber as a main material and 4 functional additives as auxiliary materials, has high elasticity and resilience and small thermal shrinkage effect, does not contain free sulfur, is high in safety and environmental protection, has good low-temperature resistance, can meet the use requirement in severe cold weather, and is particularly suitable for being used as a processing material of a rubber sealing element of an air compressor.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The high-pressure-resistant low-temperature-resistant rubber composition is characterized by being prepared from the following raw materials in parts by weight: 80-120 parts of nitrile-butadiene rubber, 45-65 parts of reinforcing agent, 10-20 parts of softening agent, 7.5-11.5 parts of compounding agent and 3-4 parts of vulcanization accelerator.
2. The high-pressure-resistant low-temperature-resistant rubber composition according to claim 1, wherein: the reinforcing agent is a mixture of carbon black N550, carbon black N774 and white carbon black 255 according to the weight part ratio of 30-50:30-40: 4-6.
3. The high-pressure-resistant low-temperature-resistant rubber composition according to claim 1, wherein: the softener is dioctyl adipate.
4. The high-pressure-resistant low-temperature-resistant rubber composition according to claim 1, wherein: the compounding agent is a mixture of zinc oxide ZNO, stearate SA antioxidant RD and antioxidant 4010 in a weight ratio of 4-6:0.5-1.5:1-3: 1-2.
5. The high-pressure-resistant low-temperature-resistant rubber composition according to claim 1, wherein: the vulcanization accelerator is a mixture of a vulcanizing agent S-80H, an accelerator CZ and an accelerator TT according to the weight part ratio of 0.5-1.5:1-1.5: 1-1.5.
6. The high-pressure-resistant low-temperature-resistant rubber composition according to claim 1, wherein: the preparation method comprises the following steps:
s1, mixing: firstly, introducing water into an internal mixer for preheating, selecting a proper amount of nitrile rubber in proportion to be added into the internal mixer, then starting the internal mixer, mixing for 50-70 seconds, putting the compounding agent into the internal mixer for mixing for 25-35 seconds, then slowly adding a proper amount of reinforcing agent and softening agent in proportion into the internal mixer, uniformly stirring the mixture, discharging the rubber through a rubber discharge port of the internal mixer when the internal temperature of the internal mixer rises to 140 ℃ of 120-;
s2, two-stage mixing: and putting the rubber in the first section after standing for 24 hours into an internal mixer, adding a vulcanization accelerator for internal mixing for 160-plus-200 seconds, discharging the rubber through a rubber discharge port of the internal mixer, and then thinly passing the discharged rubber through an open mill for rubber mixing for 110-plus-130 seconds, discharging, cooling and packaging to obtain the high-pressure-resistant and low-temperature-resistant rubber composition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110098720.6A CN112852033A (en) | 2021-01-25 | 2021-01-25 | High-pressure-resistant low-temperature-resistant rubber composition and preparation method thereof |
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| CN202110098720.6A CN112852033A (en) | 2021-01-25 | 2021-01-25 | High-pressure-resistant low-temperature-resistant rubber composition and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172433A (en) * | 1999-12-22 | 2001-06-26 | Nippon Zeon Co Ltd | Rubber composition and fuel system hose |
| JP2003105037A (en) * | 2001-09-28 | 2003-04-09 | Nippon Zeon Co Ltd | Vulcanizable rubber composition and vulcanizate |
| CN104403149A (en) * | 2014-12-18 | 2015-03-11 | 中国铁道科学研究院 | Oil-resisting and cold-resisting nitrile butadiene rubber composition and preparation method thereof |
| CN106496692A (en) * | 2016-11-04 | 2017-03-15 | 南京利德东方橡塑科技有限公司 | A kind of low temperature resistant, grease resistance, resistant to elevated temperatures rubber composition, preparation method, purposes and its application product |
| CN110157058A (en) * | 2019-06-20 | 2019-08-23 | 河北旭龙液压密封件有限公司 | A kind of low temperature resistant nitrile rubber and preparation method thereof |
-
2021
- 2021-01-25 CN CN202110098720.6A patent/CN112852033A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172433A (en) * | 1999-12-22 | 2001-06-26 | Nippon Zeon Co Ltd | Rubber composition and fuel system hose |
| JP2003105037A (en) * | 2001-09-28 | 2003-04-09 | Nippon Zeon Co Ltd | Vulcanizable rubber composition and vulcanizate |
| CN104403149A (en) * | 2014-12-18 | 2015-03-11 | 中国铁道科学研究院 | Oil-resisting and cold-resisting nitrile butadiene rubber composition and preparation method thereof |
| CN106496692A (en) * | 2016-11-04 | 2017-03-15 | 南京利德东方橡塑科技有限公司 | A kind of low temperature resistant, grease resistance, resistant to elevated temperatures rubber composition, preparation method, purposes and its application product |
| CN110157058A (en) * | 2019-06-20 | 2019-08-23 | 河北旭龙液压密封件有限公司 | A kind of low temperature resistant nitrile rubber and preparation method thereof |
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