CN111978612A - Environment-friendly hydrogenated nitrile-butadiene rubber and preparation method thereof - Google Patents
Environment-friendly hydrogenated nitrile-butadiene rubber and preparation method thereof Download PDFInfo
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- CN111978612A CN111978612A CN202010847350.7A CN202010847350A CN111978612A CN 111978612 A CN111978612 A CN 111978612A CN 202010847350 A CN202010847350 A CN 202010847350A CN 111978612 A CN111978612 A CN 111978612A
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- hydrogenated nitrile
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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
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
Abstract
The invention discloses an environment-friendly hydrogenated nitrile-butadiene rubber and a preparation method thereof, wherein the hydrogenated nitrile-butadiene rubber comprises the following components in percentage by mass: 100 parts of hydrogenated nitrile-butadiene rubber raw rubber, 1-2 parts of stearic acid, 30-40 parts of reinforcing agent, 4-8 parts of processing aid, 0.3 part of coloring agent, 1.2 parts of coupling agent, 2-6 parts of accelerator and 1-4 parts of vulcanizing agent, wherein the preparation method comprises the following steps: primary plastic refining, primary thin passing, secondary plastic refining, secondary thin passing and vulcanizing. The invention effectively improves the flexing-resistant stress relaxation-resistant property, the service performance and the service life of the hydrogenated nitrile-butadiene rubber, has excellent environmental protection performance, can reach 7-9Mpa at 100 percent definite elongation of 140-190 percent and 18-24Mpa at strength, and has no crack, stress relaxation and noise.
Description
The technical field is as follows:
the invention relates to the technical field of rubber preparation, in particular to an environment-friendly hydrogenated nitrile-butadiene rubber and a preparation method thereof.
Background art:
hydrogenated nitrile rubber is a rubber elastomer with excellent performance and high price, and is suitable for high-end occasions. Such as robots, automobiles, aerospace devices, precision instruments, etc. With the vigorous implementation of the country on the environmental protection, the environmental protection is deeply paid attention to, the national requirements on the environmental protection of products produced by factories are higher and higher, and a plurality of required environmental protection materials are difficult to meet the requirements on mechanical properties.
For example, a conveyor belt used in a sweeping robot is made of pure rubber materials, but because the cross section of a product is designed to be small and is only 1.3MM, a fabric layer cannot be arranged in the middle of the product to fix the size. And requires environmental protection levels: rohs2.0, PAHS, nonylphenol and phthalate all need to reach European Union standards, and the product requirement is light color, so reinforcing filling in the formula cannot be filled by using carbon black, and the performance data of the hydrogenated nitrile-butadiene rubber formula prepared by using common light-color fillers are as follows: the 100 percent definite elongation is lower, the 100 percent definite elongation is only about 2Mpa, the elongation is larger by 350 to 400 percent, and the maximum strength is 12 to 17Mpa, so that the performance data can not meet the actual use requirement of the transmission belt. Because the conveyor belt is used for a long time (slipping after 1000 hours of use), the belt stress is relaxed, the belt is extended in size, and the belt is easy to slip and cannot transmit the required power.
The invention content is as follows:
in order to overcome the defects of the prior art, the environment-friendly hydrogenated nitrile rubber with high wear resistance, high definite elongation, flex resistance and stress relaxation resistance and the preparation method thereof are provided.
The purpose of the invention is realized by the following technical scheme: the environment-friendly hydrogenated nitrile-butadiene rubber comprises the following components in percentage by mass: 100 parts of hydrogenated nitrile-butadiene rubber raw rubber, 1-2 parts of stearic acid, 30-40 parts of reinforcing agent, 4-8 parts of processing aid, 0.3 part of coloring agent, 1.2 parts of coupling agent, 2-6 parts of accelerator and 1-4 parts of vulcanizing agent.
The invention is further improved in that: the reinforcing agent is alkaline ER white carbon black, and the alkaline ER white carbon black is not subjected to delayed vulcanization, so that the reinforcing agent has the advantages of no need of adjusting the pH value by using diethylene glycol substances, high stress at definite elongation, small permanent deformation and the like.
The invention is further improved in that: the processing aid is a reactive aid and is mainly used for improving the dispersion uniformity of the rubber compound and the flowability of the vulcanized product.
The invention is further improved in that: the coupling agent is 3-aminopropyl triethoxysilane (Z-6011).
The invention is further improved in that: the accelerator is a synergistic polymer of an active amine and a retarder (XLA-60).
The invention is further improved in that: the vulcanizing agent is No. 1 vulcanizing agent: hexamethylenediamine carbamate (ZSHB).
A method for preparing environment-friendly hydrogenated nitrile-butadiene rubber comprises the following steps;
A) primary plastic refining: stearic acid and hydrogenated nitrile-butadiene rubber crude rubber are added into an internal mixer together according to the mass ratio for plastication, the plastication time is 15-20 minutes, and the rubber discharge temperature of the plastication machine is 115-125 degrees;
B) thin passing at one time: after rubber is discharged, an open mill is used for thin passing, then the sheet is placed for 24 hours, and sufficient plastic ensures the Mooney viscosity of the rubber material;
C) secondary plastic refining: adding a coupling agent into white carbon black for mixing, then mixing the rest materials together for plastication, standing for 24 hours after plastication, and mixing by an internal mixer for 7-9 minutes at the mixing temperature of: 100-120 degrees, and performing rubber discharge after mixing, wherein the rubber discharge temperature is as follows: 115 degrees to 130 degrees;
D) secondary thin-pass: after mixing and rubber discharging, directly thinning and passing 6 pieces out by using an open mill, standing for 24 hours, fully and uniformly mixing, and reducing vulcanizing time so as to reduce the rubber burning risk;
E) and (3) vulcanizing: dividing a furnace of rubber material in an internal mixer into 3 parts, and respectively vulcanizing, namely: adding vulcanizing agent and accelerant to mix and disperse, dividing into 3 parts is beneficial to heat dissipation, the sizing material is not easy to scorch, and the stability of the quality of the sizing material is improved.
The invention is further improved in that: the roll spacing of the open mill during thin passing is 1mm, and the thin passing is performed for 6 times in total.
Compared with the prior art, the invention has the following advantages:
the method overcomes the weak items of light-color environment-friendly hydrogenated nitrile-butadiene rubber in the aspects of low wear resistance, low definite elongation, low strength, stress relaxation and the like, simultaneously avoids the characteristics of easy scorching, poor dispersibility and flowability of a compounding agent in the processing process of the hydrogenated nitrile-butadiene rubber in the refining process, and improves the flexing resistance and stress relaxation resistance of the hydrogenated nitrile-butadiene rubber, thereby greatly improving the service performance and service life of a conveying belt, and simultaneously, the environment-friendly performance is excellent; the 100% definite elongation of the hydrogenated nitrile-butadiene rubber prepared by the method can reach 7-9Mpa, the elongation rate is 140-.
The specific implementation mode is as follows:
for the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
The following table shows specific embodiments of the environmentally friendly hydrogenated nitrile rubber:
the experimental formula is as follows:
a method for preparing environment-friendly hydrogenated nitrile-butadiene rubber comprises the following steps;
A) primary plastic refining: stearic acid and hydrogenated nitrile-butadiene rubber crude rubber are added into an internal mixer together according to the mass ratio for plastication, the plastication time is 15-20 minutes, and the rubber discharge temperature of the plastication machine is 115-125 degrees;
B) thin passing at one time: after rubber is discharged, an open mill is used for thin passing, then the sheet is placed for 24 hours, and sufficient plastic ensures the Mooney viscosity of the rubber material; the roller distance of the open mill during thin passing is 1mm, and the thin passing is performed for 6 times in total;
C) secondary plastic refining: adding a coupling agent into white carbon black for mixing, then mixing the rest materials together for plastication, standing for 24 hours after plastication, and mixing by an internal mixer for 7-9 minutes at the mixing temperature of: 100-120 degrees, and performing rubber discharge after mixing, wherein the rubber discharge temperature is as follows: 115 degrees to 130 degrees;
D) secondary thin-pass: after mixing and rubber discharging, directly thinning and passing 6 pieces out by using an open mill, standing for 24 hours, fully and uniformly mixing, and reducing vulcanizing time so as to reduce the rubber burning risk;
E) and (3) vulcanizing: dividing a furnace of rubber material in an internal mixer into at least 3 parts, and respectively vulcanizing, namely: adding a vulcanizing agent and an accelerant for mixing and thin-passing dispersion, wherein the mixture is divided into at least 3 parts, which is favorable for heat dissipation, the rubber material is not easy to scorch, and the stability of the quality of the rubber material is improved.
The invention overcomes the weak items of light-color environment-friendly hydrogenated nitrile-butadiene rubber in the aspects of low wear resistance, low definite elongation, low strength, stress relaxation and the like, simultaneously avoids the characteristics of easy scorching, poor dispersibility and flowability of a compounding agent in the processing process of the hydrogenated nitrile-butadiene rubber in the refining process, and improves the flexing resistance and stress relaxation resistance of the hydrogenated nitrile-butadiene rubber, thereby greatly improving the service performance and service life of a conveying belt, and simultaneously, the environment-friendly performance is excellent; the hydrogenated nitrile-butadiene rubber prepared by the method has 100 percent of definite elongation which can reach 7-9Mpa, the elongation of 140-.
The applicant further states that the present invention is described in the above embodiments to explain the implementation method and device structure of the present invention, but the present invention is not limited to the above embodiments, i.e. it is not meant to imply that the present invention must rely on the above methods and structures to implement the present invention. It should be understood by those skilled in the art that any modifications to the present invention, the implementation of alternative equivalent substitutions and additions of steps, the selection of specific modes, etc., are within the scope and disclosure of the present invention.
The present invention is not limited to the above embodiments, and all the ways of achieving the objects of the present invention by using the structure and the method similar to the present invention are within the protection scope of the present invention.
Claims (8)
1. An environment-friendly hydrogenated nitrile-butadiene rubber is characterized in that: the hydrogenated nitrile-butadiene rubber base comprises the following components in percentage by mass: 100 parts of hydrogenated nitrile-butadiene rubber raw rubber, 1-2 parts of stearic acid, 30-40 parts of reinforcing agent, 4-8 parts of processing aid, 0.3 part of coloring agent, 1.2 parts of coupling agent, 2-6 parts of accelerator and 1-4 parts of vulcanizing agent.
2. The environment-friendly hydrogenated nitrile rubber according to claim 1, wherein: the reinforcing agent is alkaline ER white carbon black.
3. The environment-friendly hydrogenated nitrile rubber according to claim 1, wherein: the processing aid is a coagent.
4. The environment-friendly hydrogenated nitrile rubber according to claim 1, wherein: the coupling agent is 3-aminopropyl triethoxysilane (Z-6011).
5. The environment-friendly hydrogenated nitrile rubber according to claim 1, wherein: the accelerator is a synergistic polymer of an active amine and a retarder (XLA-60).
6. The environment-friendly hydrogenated nitrile rubber according to claim 1, wherein: the vulcanizing agent is No. 1 vulcanizing agent: hexamethylenediamine carbamate (ZSHB).
7. A process for the preparation of the environmentally friendly hydrogenated nitrile rubber according to claim 1, wherein: comprises the following steps;
A) primary plastic refining: stearic acid and hydrogenated nitrile-butadiene rubber crude rubber are added into an internal mixer together according to the mass ratio for plastication, the plastication time is 15-20 minutes, and the rubber discharge temperature of the plastication machine is 115-125 degrees.
B) Thin passing at one time: after the rubber is discharged, an open mill is used for thin passing, and then the sheet is placed for 24 hours;
C) secondary plastic refining: adding a coupling agent into white carbon black for mixing, then fully mixing stearic acid, a reinforcing agent, a processing aid, a coloring agent, a coupling agent, an accelerant and a vulcanizing agent, plasticating, standing for 24 hours after plasticating, and mixing by using an internal mixer for 7-9 minutes at the mixing temperature: 100-120 degrees, and performing rubber discharge after mixing, wherein the rubber discharge temperature is as follows: 115 degrees to 130 degrees;
D) secondary thin-pass: after mixing and rubber discharging, directly thinning and passing through 6 pieces by using an open mill, and standing for 24 hours;
E) and (3) vulcanizing: dividing a furnace of rubber material in an internal mixer into 3 parts, and respectively vulcanizing, namely: adding a vulcanizing agent and an accelerator for mixing and dispersing.
8. The process for preparing an environmentally friendly hydrogenated nitrile rubber according to claim 7, wherein: the roll spacing of the open mill during thin passing is 1mm, and the thin passing is performed for 6 times in total.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010847350.7A CN111978612A (en) | 2020-08-21 | 2020-08-21 | Environment-friendly hydrogenated nitrile-butadiene rubber and preparation method thereof |
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| CN202010847350.7A CN111978612A (en) | 2020-08-21 | 2020-08-21 | Environment-friendly hydrogenated nitrile-butadiene rubber and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015133A (en) * | 2021-11-15 | 2022-02-08 | 启东市亿方密封科技有限公司 | Ultrahigh-performance environment-friendly hydrogenated nitrile-butadiene rubber and preparation method thereof |
Citations (7)
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|---|---|---|---|---|
| US5651995A (en) * | 1994-09-30 | 1997-07-29 | Nippon Zeon Co., Ltd. | Highly saturated nitrile rubber, process for producing same, vulcanizable rubber composition, aqueous emulsion and adhesive composition |
| CN1432591A (en) * | 2002-01-17 | 2003-07-30 | 拜尔公司 | Silica filled elastomer compound |
| US20040166346A1 (en) * | 2003-02-20 | 2004-08-26 | Dirk Achten | Hydrogenated nitrile butadiene rubber |
| JP2005015668A (en) * | 2003-06-27 | 2005-01-20 | Uchiyama Mfg Corp | Hydrogenated nitrile-butadiene rubber composition |
| US20060079362A1 (en) * | 2004-09-29 | 2006-04-13 | Masato Tomobuchi | Toothed belt |
| CN106700958A (en) * | 2016-12-07 | 2017-05-24 | 江门市鑫辉密封科技有限公司 | Method for bonding hydrogenated nitrile-butadiene rubber |
| CN110591191A (en) * | 2019-10-17 | 2019-12-20 | 宁波市北仑优联特橡塑制品有限公司 | Hydrogenated nitrile rubber for automobile sealing ring and preparation method thereof |
-
2020
- 2020-08-21 CN CN202010847350.7A patent/CN111978612A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5651995A (en) * | 1994-09-30 | 1997-07-29 | Nippon Zeon Co., Ltd. | Highly saturated nitrile rubber, process for producing same, vulcanizable rubber composition, aqueous emulsion and adhesive composition |
| CN1432591A (en) * | 2002-01-17 | 2003-07-30 | 拜尔公司 | Silica filled elastomer compound |
| US20040166346A1 (en) * | 2003-02-20 | 2004-08-26 | Dirk Achten | Hydrogenated nitrile butadiene rubber |
| JP2005015668A (en) * | 2003-06-27 | 2005-01-20 | Uchiyama Mfg Corp | Hydrogenated nitrile-butadiene rubber composition |
| US20060079362A1 (en) * | 2004-09-29 | 2006-04-13 | Masato Tomobuchi | Toothed belt |
| CN106700958A (en) * | 2016-12-07 | 2017-05-24 | 江门市鑫辉密封科技有限公司 | Method for bonding hydrogenated nitrile-butadiene rubber |
| CN110591191A (en) * | 2019-10-17 | 2019-12-20 | 宁波市北仑优联特橡塑制品有限公司 | Hydrogenated nitrile rubber for automobile sealing ring and preparation method thereof |
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| 丁绍兰: "《革制品材料学》", 31 January 2019, 中国轻工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015133A (en) * | 2021-11-15 | 2022-02-08 | 启东市亿方密封科技有限公司 | Ultrahigh-performance environment-friendly hydrogenated nitrile-butadiene rubber and preparation method thereof |
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Application publication date: 20201124 |