CN113831613A - Sulfur system color low-pressure variable high-temperature resistant NBR (nitrile-butadiene rubber) compound and preparation method thereof - Google Patents
Sulfur system color low-pressure variable high-temperature resistant NBR (nitrile-butadiene rubber) compound and preparation method thereof Download PDFInfo
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- CN113831613A CN113831613A CN202111087989.0A CN202111087989A CN113831613A CN 113831613 A CN113831613 A CN 113831613A CN 202111087989 A CN202111087989 A CN 202111087989A CN 113831613 A CN113831613 A CN 113831613A
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- 229920000459 Nitrile rubber Polymers 0.000 title claims abstract description 49
- 150000001875 compounds Chemical class 0.000 title claims abstract description 28
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 27
- 239000011593 sulfur Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims description 9
- 229920001971 elastomer Polymers 0.000 claims abstract description 40
- 239000005060 rubber Substances 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 19
- 238000004073 vulcanization Methods 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims abstract description 15
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 15
- 238000013329 compounding Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims description 25
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 239000004595 color masterbatch Substances 0.000 claims description 7
- 229940126062 Compound A Drugs 0.000 claims description 6
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 229920001030 Polyethylene Glycol 4000 Polymers 0.000 claims description 4
- UJAWGGOCYUPCPS-UHFFFAOYSA-N 4-(2-phenylpropan-2-yl)-n-[4-(2-phenylpropan-2-yl)phenyl]aniline Chemical compound C=1C=C(NC=2C=CC(=CC=2)C(C)(C)C=2C=CC=CC=2)C=CC=1C(C)(C)C1=CC=CC=C1 UJAWGGOCYUPCPS-UHFFFAOYSA-N 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 11
- 238000007906 compression Methods 0.000 abstract description 11
- 230000032683 aging Effects 0.000 abstract description 4
- 239000006229 carbon black Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 229920013648 Perbunan Polymers 0.000 description 2
- 241000227425 Pieris rapae crucivora Species 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004902 Softening Agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010060 peroxide vulcanization Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a sulfur system color low-pressure variable high-temperature resistant NBR rubber compound, which comprises the following components in percentage by weight: 44-50% of nitrile rubber, 15-21% of light-color reinforcing agent, 21-27% of light-color filler, 0.8-1.5% of anti-aging agent, 3-6% of other compounding agent and 2.5-5.0% of vulcanization accelerator. The product of the invention adopts a sulfur system, has lower compression set, excellent aging resistance, oil resistance and elasticity, and good processing performance and physical and mechanical properties.
Description
Technical Field
The invention relates to rubber, in particular to a sulfur system color low-pressure variable high-temperature resistant NBR rubber compound and a preparation method thereof.
Background
The existing sealing system has a large demand on color sealing rubber, and particularly in the field of mechanical sealing, the traditional black sealing element cannot meet the demand of product design in some places. With the rapid development of the mechanical industry, more requirements are provided for colorful NBR sealing rubber materials with high elasticity, low pressure change, aging resistance and oil resistance, and most of the colorful NBR products with the traditional formula have larger compression set and can not meet the requirements. The peroxide curing system can reduce the compression set of the colorful NBR product, but the curing time is long, the tearing performance is not good, and the economic benefit is influenced.
Therefore, the development of the color low-voltage variable high-temperature resistant NBR rubber compound vulcanized by adopting a sulfur system is urgently needed, and the development prospect is wide.
Disclosure of Invention
The invention provides a sulfur system color low-pressure variable high-temperature resistant NBR rubber compound and a preparation method thereof aiming at the problems.
In order to achieve the purpose, the invention provides the following technical scheme: the sulfur system color low-pressure variable high-temperature resistant NBR rubber compound comprises the following components in percentage by weight:
44.0-50.0% of nitrile rubber
15.0 to 21.0 percent of light-color reinforcing agent
21.0 to 27.0 percent of light-color filler
0.8 to 1.5 percent of anti-aging agent
3.0 to 6.0 percent of other compounding agents
2.5 to 5.0 percent of vulcanization accelerator.
In particular, the other complexing agent is a mixture of zinc oxide, stearic acid and a processing aid and a color masterbatch.
As a further improvement of the embodiment of the invention, the sulfur system color low-pressure variable high-temperature resistant NBR rubber compound comprises the following components in percentage by weight:
45.0 to 47.0 percent of nitrile rubber
16.0 to 18.0 percent of light-color reinforcing agent
23.0 to 25.0 percent of light-color filler
1.0 to 1.5 percent of antiager
4.0 to 5.0 percent of other compounding agents
3.5 to 4.5 percent of vulcanization accelerator.
Wherein the nitrile rubber is a mixture of PERBUNN 2845F and PERBUNN 3446F. The NBR rubber has good heat resistance and oil resistance, and is suitable for high temperature resistant, medium resistant and low pressure variable products, such as oil pipes, gaskets, oil seals and the like.
The light color reinforcing agent is ZJ-355 and basic white carbon black SODASIL P95. ZJ-355 imparts good strength to the compound, but if too large an amount is used, it tends to result in increased compression set. The alkaline white carbon black SODASIL P95 endows the rubber material with good elasticity and low pressure change, and can promote the vulcanization of the rubber material, compared with the common white carbon black, SODASIL P95 is a key material for reducing the compression permanent deformation of the colored rubber material.
The light-colored filler is a mixture of PF216 and R103. PF216 is diatomite with a special structure, has unique structural characteristics, can remarkably reduce the compression permanent deformation of rubber while improving the strength, can endow the rubber with good physical properties and rebound resilience, and improves the edge tearing performance of a product.
The anti-aging agent is a mixture of anti-aging agents NAUGARD 445 and ZMTI. The 2 kinds of anti-aging agents are matched, so that the anti-aging agent has a lasting protection effect, and the requirement of the product on heat air aging resistance and compression permanent deformation reduction at high temperature can be further improved by pumping out heat-resistant oil.
The processing aid is a mixture of a processing aid WB222, a processing aid 935P and a processing aid PEG 4000; the color master batch is R111A 2.
The vulcanization accelerator is a mixture of S-80E, TMTD-75E, CBS-80E, TETD-80E and PVI.
On the other hand, the embodiment of the invention also provides a preparation method of the sulfur system color low-pressure variable high-temperature resistant NBR rubber compound, which comprises the following preparation steps according to the performance requirement characteristics of the formula.
(1) Preparing materials, wherein according to the whole formula and the mixing characteristic of the nitrile rubber, the preparation sequence is as follows:
sequentially comprising nitrile rubber, an anti-aging agent, other accessory ingredients, a light-color reinforcing agent, light-color filler and a vulcanization accelerator;
(2) firstly, mixing, namely putting the nitrile rubber, the anti-aging agent and other ingredients into an internal mixer for mixing for 60 s; firstly, putting a light-color reinforcing agent into an internal mixer, mixing for 120-180 s, then cleaning an upper top plug, then putting a light-color filler, mixing for 60-90 s, then discharging and discharging a sheet to prepare a rubber compound A for later use;
(3) and (3) mixing the rubber compound A for 60-80 seconds, cleaning, mixing for 30-60 seconds again, and discharging the sheet for later use after sufficient mixing and dispersion.
The rubber adopts the PERBUAN 2845F and the PERBUAN 3446F as main rubber, has the characteristics of good heat resistance and medium resistance, and has the advantages of good pressure deformation performance and low mold pollution. The most outstanding performance of the product is that the product has good elasticity, excellent pressure-variable performance and heat resistance, high vulcanization efficiency and extremely low mold pollution tendency on the premise of giving consideration to physical properties and oil resistance; in addition, the sulfur system color low-pressure variable high-temperature resistant NBR compound rubber adopts a sulfur vulcanization system, compared with a peroxide vulcanization system, the sulfur system color low-pressure variable high-temperature resistant NBR compound rubber has the advantages of short required vulcanization time, good product edge tearing performance, high production efficiency and obvious economic benefit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to achieve the purpose, the invention provides the following technical scheme: the sulfur system color low-pressure variable high-temperature resistant NBR rubber compound comprises the following components in percentage by weight:
44.0-50.0% of nitrile rubber
15.0 to 21.0 percent of light-color reinforcing agent
21.0 to 27.0 percent of light-color filler
0.8 to 1.5 percent of anti-aging agent
3.0 to 6.0 percent of other compounding agents
2.5 to 5.0 percent of vulcanization accelerator.
Other complexing agents are, in particular, zinc oxide, stearic acid and processing aids and color masterbatches.
Preferably, the sulfur system color low-pressure variable high-temperature resistant NBR rubber compound comprises the following components in percentage by weight:
45.0 to 47.0 percent of nitrile rubber
16.0 to 18.0 percent of light-color reinforcing agent
23.0 to 25.0 percent of light-color filler
1.0 to 1.5 percent of antiager
4.0 to 5.0 percent of other compounding agents
3.5 to 4.5 percent of vulcanization accelerator.
The nitrile rubbers are available under the trademark PERBUN 2845F and PERBUN 3446F. The NBR rubber has good heat resistance and oil resistance, and is suitable for high temperature resistant, medium resistant and low pressure variable products, such as oil pipes, gaskets, oil seals and the like.
The raw rubber is selected to be used together with the PERBUAN 2845F and the PERBUAN 3446F, the unique catalyst synthesis characteristics of the raw rubber are fully utilized, and under the same vulcanization system, higher crosslinking density can be obtained.
The light color reinforcing agent is ZJ-355 and basic white carbon black SODASIL P95. ZJ-355 imparts good strength to the compound, but too much is used, which tends to result in increased compression set. The basic white carbon black SODASIL P95 is a basic component, can promote vulcanization, has unique structural characteristics, can endow rubber materials with good elasticity and low pressure change, and is a key material for reducing the compression permanent deformation of the colored rubber materials compared with common white carbon black SODASIL P95.
The light-colored filler is a mixture of PF216 and R103, the PF216 is diatomite with a special structure, and the special structural characteristics of the diatomite can obviously reduce the compression permanent deformation of the rubber while improving the strength, so that the rubber can have good physical properties and rebound resilience, and the edge tearing performance of the product is improved.
The anti-aging agent is a mixture of anti-aging agents NAUGARD 445 and ZMTI. The 2 kinds of anti-aging agents are matched, so that the anti-aging agent has a lasting protection effect, and the requirement of the product on heat air aging resistance and compression permanent deformation reduction at high temperature can be further improved by pumping out heat-resistant oil.
The processing aid is a mixture of processing aid WB222, processing aid 935P and processing aid PEG 4000; the color master batch is R111A 2.
The vulcanization accelerator is a mixture of S-80E, TMTD-75E, CBS-80E, TETD-80E and PVI.
The sulfur system color low-pressure change high-temperature resistant NBR compound rubber related to the invention is manufactured according to the following steps.
Preparing the glue, accurately weighing the raw materials in sequence according to the proportion in the table 1, and standing for later use.
Firstly, mixing, namely putting the nitrile rubber, the anti-aging agent and other ingredients into an internal mixer for mixing for 60 s; firstly, putting a light-color reinforcing agent into an internal mixer, mixing for 120-180 s, then cleaning an upper top plug, then putting a light-color filler, mixing for 60-90 s, then discharging and discharging a sheet to prepare a rubber compound A for later use;
and (3) mixing the rubber compound A for 60-80 seconds, cleaning, mixing for 30-60 seconds again, and discharging the sheet for later use after sufficient mixing and dispersion.
Table 1 shows the mixing ratios of the components in examples 1 to 4 in terms of mass fractions.
TABLE 1
Table 2 shows the mixing ratios of the other compounding ingredients of examples 1 to 4 in terms of mass fraction
TABLE 2
Table 3 shows the blending ratio of the anti-aging agents of examples 1 to 4 in terms of mass fraction
TABLE 3
Wherein the processing aid is a mixture of processing aid WB222, processing aid 935P and processing aid PEG4000, and the mass fraction of the processing aids of examples 1-4 is shown in Table 4.
TABLE 4
Table 5 shows the kneading times of examples 1 to 4.
TABLE 5
Table 6 shows the performance parameters of the sulfur-based color low-pressure change high-temperature NBR compounds prepared in examples 1 to 4.
TABLE 6
As can be seen from Table 6, the sulfur system color low-pressure change high-temperature resistant NBR compound of the invention has the following characteristics: firstly, the rubber takes the combination of PERBUNAN 2845F and PERBUNAN 3446F as main rubber, has the properties of high temperature resistance, low temperature resistance, medium resistance and oil resistance, has good pressure deformation performance, and ensures the service life of products. The four formulas of the embodiment all meet the requirements of technical parameters of products, and the formula of the embodiment 3 has the optimal performance, because the rubber content is moderate, and the vulcanization system and the protection system are properly matched, the four formulas not only meet the requirements of the technical parameters of the products, but also have better performance advantages. On the premise of meeting other physical property requirements, a matching scheme with optimal cost performance can be reasonably selected according to the price change of the reinforcing filler and the softening agent.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The sulfur system color low-pressure-change high-temperature-resistant NBR rubber compound is characterized by comprising the following components in percentage by weight:
44.0-50.0% of nitrile rubber
15.0 to 21.0 percent of light-color reinforcing agent
21.0 to 27.0 percent of light-color filler
0.8 to 1.5 percent of anti-aging agent
3.0 to 6.0 percent of other compounding agents
2.5-5.0% of a vulcanization accelerator;
the other compounding agent is a mixture of zinc oxide, stearic acid, a processing aid and color masterbatch.
2. The sulfur system color low-pressure change high-temperature resistant NBR compound as claimed in claim 1, which is characterized by comprising the following components by weight percent:
45.0 to 47.0 percent of nitrile rubber
16.0 to 18.0 percent of light-color reinforcing agent
23.0 to 25.0 percent of light-color filler
1.0 to 1.5 percent of antiager
4.0 to 5.0 percent of other compounding agents
3.5 to 4.5 percent of vulcanization accelerator.
3. The sulfur system color low pressure change high temperature resistant NBR compound of claim 1, wherein the nitrile rubber is a combination of PERBUN 2845F and PERBUN 3446F.
4. The sulfur system colored low-pressure change high-temperature resistant NBR compound as claimed in claim 1, wherein the light color reinforcing agent is a mixture of white carbon ZJ-355 and basic white carbon SODASIL P95.
5. The sulfur system color low pressure change high temperature resistant NBR compound of claim 1, wherein the light color filler is a mixture of PF216 and R103.
6. The sulfur system colored low-pressure change high-temperature resistant NBR compound as claimed in claim 1, wherein the anti-aging agent is a mixture of NAUGARD 445 and ZMTI.
7. The sulfur system color low pressure change high temperature resistant NBR compound as claimed in claim 1, wherein the processing aid is a combination of processing aid WB222, processing aid 935P, and processing aid PEG 4000.
8. The sulfur system color low-pressure change high-temperature resistant NBR compound as claimed in claim 1, wherein the color masterbatch is color masterbatch R111A 2.
9. The sulfur system color low pressure change high temperature resistant NBR compound as claimed in claim 1, wherein the vulcanization accelerator is a mixture of S-80E, TMTD-75E, CBS-80E, TETD-80E and PVI.
10. The preparation method of the sulfur system color low-pressure-change high-temperature-resistant NBR compound as claimed in any one of claims 1 to 9, wherein the preparation method comprises the following steps: the method sequentially comprises the following steps:
(1) preparing materials in the following sequence:
sequentially comprising nitrile rubber, an anti-aging agent, other accessory ingredients, a light-color reinforcing agent, light-color filler and a vulcanization accelerator;
(2) firstly, mixing, namely putting the nitrile rubber, the anti-aging agent and other ingredients into an internal mixer for mixing for 60 s; firstly, putting a light-color reinforcing agent into an internal mixer, mixing for 120-180 s, then cleaning an upper top plug, then putting a light-color filler, mixing for 60-90 s, then discharging and discharging a sheet to prepare a rubber compound A for later use;
(3) and (3) mixing the rubber compound A for 60-80 seconds, cleaning, mixing for 30-60 seconds again, and discharging the sheet for later use after sufficient mixing and dispersion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111087989.0A CN113831613A (en) | 2021-09-16 | 2021-09-16 | Sulfur system color low-pressure variable high-temperature resistant NBR (nitrile-butadiene rubber) compound and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111087989.0A CN113831613A (en) | 2021-09-16 | 2021-09-16 | Sulfur system color low-pressure variable high-temperature resistant NBR (nitrile-butadiene rubber) compound and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113831613A true CN113831613A (en) | 2021-12-24 |
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| CN202111087989.0A Pending CN113831613A (en) | 2021-09-16 | 2021-09-16 | Sulfur system color low-pressure variable high-temperature resistant NBR (nitrile-butadiene rubber) compound and preparation method thereof |
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|---|---|---|---|---|
| CN102532626A (en) * | 2012-01-12 | 2012-07-04 | 山东大学 | High strength rubber with radiation resistance and thermal aging resistance and preparation method thereof |
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| CN103435869A (en) * | 2013-09-02 | 2013-12-11 | 沈阳化工大学 | Light-color NBR/PVC (nitrile butadiene rubber/poly vinyl chloride) oil-resistant rubber material with high acrylonitrile content |
| CN111748135A (en) * | 2019-03-28 | 2020-10-09 | 内山工业株式会社 | Rubber composition and rubber molded article |
| CN111763361A (en) * | 2020-07-10 | 2020-10-13 | 嘉兴东升橡塑有限公司 | Rubber composition and preparation method thereof |
| CN112321915A (en) * | 2020-11-25 | 2021-02-05 | 芜湖集拓橡胶技术有限公司 | Nitrile rubber sealing ring |
-
2021
- 2021-09-16 CN CN202111087989.0A patent/CN113831613A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532626A (en) * | 2012-01-12 | 2012-07-04 | 山东大学 | High strength rubber with radiation resistance and thermal aging resistance and preparation method thereof |
| CN103275367A (en) * | 2013-06-22 | 2013-09-04 | 山西至正实业有限公司 | Seal rubber used for valves and preparation method thereof |
| CN103435869A (en) * | 2013-09-02 | 2013-12-11 | 沈阳化工大学 | Light-color NBR/PVC (nitrile butadiene rubber/poly vinyl chloride) oil-resistant rubber material with high acrylonitrile content |
| CN111748135A (en) * | 2019-03-28 | 2020-10-09 | 内山工业株式会社 | Rubber composition and rubber molded article |
| CN111763361A (en) * | 2020-07-10 | 2020-10-13 | 嘉兴东升橡塑有限公司 | Rubber composition and preparation method thereof |
| CN112321915A (en) * | 2020-11-25 | 2021-02-05 | 芜湖集拓橡胶技术有限公司 | Nitrile rubber sealing ring |
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