CN111777810A - PU resin type wear-resistant nitrile rubber and preparation method thereof - Google Patents
PU resin type wear-resistant nitrile rubber and preparation method thereof Download PDFInfo
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- CN111777810A CN111777810A CN202010702589.5A CN202010702589A CN111777810A CN 111777810 A CN111777810 A CN 111777810A CN 202010702589 A CN202010702589 A CN 202010702589A CN 111777810 A CN111777810 A CN 111777810A
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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Abstract
The invention aims to further improve the wear resistance of nitrile rubber, provides PU resin type wear-resistant nitrile rubber and a preparation method thereof, and belongs to the technical field of nitrile rubber. The nitrile rubber comprises the following raw materials in parts by weight: 100 parts of nitrile rubber, 22-27 parts of zinc oxide, 10-20 parts of PU resin, 8-13 parts of 1, 4-butanediol, 22022-27 parts of carbon black N, 18-23 parts of carbon black N550, 6-10 parts of plasticizer, 0.7-1.2 parts of antioxidant MBZ and 1.2-1.8 parts of vulcanizing agent DCP. The PU resin is added on the basis of a general nitrile rubber formula, and a vulcanization system of the nitrile rubber is changed through reasonable proportion, so that a PU resin molecular chain and a nitrile rubber molecular chain are subjected to copolymerization reaction, and the wear resistance of the nitrile rubber is improved.
Description
Technical Field
The invention belongs to the technical field of nitrile rubber, and particularly relates to PU resin type wear-resistant nitrile rubber and a preparation method thereof.
Background
The improvement of the wear resistance of the rubber roller is the aim of the rubber roller industry. Depending on the requirements of the product and the period of use of the product in actual production.
The nitrile rubber is a synthetic rubber prepared by copolymerizing butadiene and acrylonitrile, is mainly produced by a low-temperature emulsion polymerization method, and has the advantages of excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force. The disadvantages are poor low temperature resistance, ozone resistance, poor insulation properties and slightly low elasticity. The rubber is widely used for manufacturing various oil-resistant rubber products, oil-resistant gaskets, sleeves, flexible packages, flexible rubber tubes, printing and dyeing rubber rollers, cable rubber materials and the like, and becomes an indispensable elastic material in the industries of automobiles, aviation, petroleum, copying and the like.
PU resin, code UR, is polymerized from polyester (or polyether) and diisocyanamide compounds. Its chemical structure is more complex than that of general elastic polymer, besides repeated carbamate groups, the molecular chain also contains ester group, ether group, aromatic group and other groups. The UR molecular main chains have the advantages of high hardness, good strength, high elasticity, high wear resistance, tear resistance, aging resistance, ozone resistance, radiation resistance, good conductivity and the like due to the acting force of hydrogen bonds, and are incomparable with common rubber.
Disclosure of Invention
The invention aims to further improve the wear resistance of nitrile rubber, and provides PU resin type wear-resistant nitrile rubber and a preparation method thereof. The PU resin is added on the basis of a general nitrile rubber formula, and a vulcanization system of the nitrile rubber is changed through reasonable proportion, so that a PU resin molecular chain and a nitrile rubber molecular chain are subjected to copolymerization reaction, and the wear resistance of the nitrile rubber is improved.
One of the technical schemes of the invention is that the PU resin type wear-resistant nitrile rubber comprises the following raw material components in parts by weight:
100 portions of nitrile rubber
22-27 parts of zinc oxide
10-20 parts of PU resin
Carbon black N22022-27 parts
Carbon black N55018-23 parts
8-13 parts of 1, 4-butanediol
6-10 parts of plasticizer
0.7-1.2 parts of antioxidant MBZ
1.2-1.8 parts of vulcanizing agent DCP.
Wherein the nitrile rubber is 6280;
the PU resin is polyurethane resin D3145; the physical and mechanical property detection result of the vulcanized PU resin is as follows: the hardness is 90-92 degrees (Shore hardness); the tensile strength is 50-55 MPa; the tearing strength is 90-100 KN/M; elongation at break of 200-3/1.6km；
The plasticizer is dioctyl terephthalate; after the plasticizer is added, the semi-finished rubber material is soft in texture, good in processing performance and smooth in extruded rubber strip, and the semi-finished rubber material can be recycled after secondary processing, so that the yield of the product is improved.
The second technical scheme of the invention is that the preparation method of the PU resin type wear-resistant nitrile rubber comprises the following steps:
preparing various raw materials according to the proportion of the formula, mixing and refining the raw materials by using an internal mixer to prepare a sizing material, performing thin pass for a plurality of times by using an open mill, pressing the sizing material into a rubber sheet, and standing the rubber sheet for 36-48 hours.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the vulcanization system of the nitrile rubber is changed through reasonable proportioning of the raw materials, so that the molecular chain of the PU resin and the molecular chain of the nitrile rubber are subjected to copolymerization reaction;
2. in the raw materials used in the invention, the adopted nitrile rubber can enable linear molecular chains to form three-dimensional reticular molecular chains in a short time at the temperature of below 120 ℃ in the vulcanization process, the cross-linking density of the product is increased after vulcanization, and various performance indexes of the product are superior to those of the product of a universal vulcanization system; the nitrile rubber prepared by adding the PU resin not only has higher wear resistance, but also can play a role of an operation aid in rubber materials, so that the rubber compound is convenient to process; the 1, 4-butanediol plays a role of a temporary plasticizer in the processing process and participates in the vulcanization effect in the vulcanization process, and the vulcanized rubber can be endowed with higher crosslinking density, so that the application of the 1, 4-butanediol not only can improve the processing performance of the nitrile rubber and the quality of products, but also can reduce or replace other auxiliary materials, such as: the usage amount of the softening agent, the accelerator and the carbon black, thus greatly reducing the cost on the use of raw materials;
3. the wear resistance of the nitrile rubber is greatly improved.
Detailed Description
Nitrile rubber 6280 in the following examples was purchased from LG of korea; polyurethane resin D3145 was purchased from norway polyurethane, inc, shandong; the plasticizer is dioctyl terephthalate (environment-friendly LF-30).
Example 1
1.1. Preparing raw materials, wherein the raw materials comprise the following components in parts by mass: 100 parts of nitrile rubber, 25 parts of zinc oxide, 20 parts of PU resin, 10 parts of 1, 4-butanediol, 22025 parts of carbon black N, N55020 parts of carbon black, 8 parts of plasticizer, 1 part of antioxidant MBZ and 1.5 parts of vulcanizing agent DCP.
1.2 the preparation method comprises the following steps: taking 1000g of nitrile rubber, 250g of zinc oxide, 200g of PU resin, 100g of 1, 4-butanediol, N220250 g of carbon black, N550200 g of carbon black, 80g of plasticizer, 10g of anti-aging agent MBZ and 15g of vulcanizing agent DCP, mixing and refining by using an internal mixer to prepare a sizing material, performing thin pass for 4 times by using an open mill, pressing into a film and standing for 48 hours to obtain the nitrile rubber sizing material.
1.3, detection result: the rubber sample is prepared according to the national standard of rubber test sizing material, mixing and vulcanizing equipment and operation procedures for detection. Rubber compositionPhysical and mechanical properties: tensile strength of 17-20MPa, tear strength of 45-50KN/M, elongation at break of 250-300%, Shore hardness of 78-85HA, and Akron abrasion of 0.14cm3/1.6km。
Example 2
1.1. Preparing raw materials, wherein the raw materials comprise the following components in parts by mass: 100 parts of nitrile rubber, 25 parts of zinc oxide, 15 parts of PU resin, 10 parts of 1, 4-butanediol, 22025 parts of carbon black N, 55020 parts of carbon black, 8 parts of plasticizer, 1 part of antioxidant MBZ and 1.5 parts of vulcanizing agent DCP.
1.2 the preparation method comprises the following steps: taking 1000g of nitrile rubber, 250g of zinc oxide, 150g of PU resin, 100g of 1, 4-butanediol, N220250 g of carbon black, N550200 g of carbon black, 80g of plasticizer, 10g of anti-aging agent MBZ and 15g of vulcanizing agent DCP, mixing and refining by using an internal mixer to prepare a sizing material, performing thin pass for 4 times by using an open mill, pressing into a film and standing for 48 hours to obtain the nitrile rubber sizing material.
1.3, detection result: preparing a rubber sample according to the national standard of rubber test sizing material, mixing and vulcanizing equipment and operation procedures for detection; physical and mechanical properties of the rubber: tensile strength of 17-20MPa, tear strength of 45-50KN/M, elongation at break of 250-300%, Shore hardness of 75-80HA, and Akron abrasion of 0.15cm3/1.6km。
Comparative example 1
1.1. Preparing raw materials, wherein the raw materials comprise the following components in parts by mass: 115 parts of nitrile rubber, 25 parts of zinc oxide, 15 parts of PU resin, 10 parts of 1, 4-butanediol, 22025 parts of carbon black N, N55020 parts of carbon black, 8 parts of plasticizer, 1 part of antioxidant MBZ and 1.5 parts of vulcanizing agent DCP.
The preparation method is the same as example 2.
The rubber roller prepared in the embodiment 2 and the rubber roller prepared in the comparative example 1 are used, the abrasion resistance of the rubber roller prepared in the embodiment 2 is greatly improved, and the service cycle of the rubber roller is improved by 20-30% compared with the rubber roller prepared in the comparative example 1.
Comparative example 2
1.1. Preparing raw materials, wherein the raw materials comprise the following components in parts by mass: 100 parts of nitrile rubber, 25 parts of zinc oxide, 25 parts of PU resin, 10 parts of 1, 4-butanediol, 22025 parts of carbon black N, N55020 parts of carbon black, 8 parts of plasticizer, 1 part of antioxidant MBZ and 1.5 parts of vulcanizing agent DCP.
The preparation method is the same as example 2.
The physical and mechanical properties of the rubber material obtained by the formula are reduced, and if the addition of the PU resin is continuously increased, the rubber vulcanization system is even destroyed.
Example 3
1.1. Preparing raw materials, wherein the raw materials comprise the following components in parts by mass: 100 parts of nitrile rubber, 25 parts of zinc oxide and 10 parts of PU resin; 10 parts of 1, 4-butanediol; carbon black N22025 parts; carbon black N55020 parts; 8 parts of a plasticizer; 1 part of an anti-aging agent MBZ; 1.5 parts of vulcanizing agent DCP.
1.2 the preparation method comprises the following steps: taking 1000g of nitrile rubber, 250g of zinc oxide, 100g of PU resin, 100g of 1, 4-butanediol, N220250 g of carbon black, N550200 g of carbon black, 80g of plasticizer, 10g of anti-aging agent MBZ and 15g of vulcanizing agent DCP, mixing and refining by using an internal mixer to prepare a sizing material, performing thin pass for 4 times by using an open mill, pressing into a film and standing for 48 hours to obtain the nitrile rubber sizing material.
1.3, detection result: preparing a rubber sample according to the national standard of rubber test sizing material, mixing and vulcanizing equipment and operation procedures for detection; physical and mechanical properties of the rubber: tensile strength of 17-20MPa, tear strength of 45-50KN/M, elongation at break of 250-300%, Shore hardness of 75-80HA, and Akron abrasion of 0.18cm3/1.6km。
Example 4
1.1. Preparing raw materials, wherein the raw materials comprise the following components in parts by mass: 100 parts of nitrile rubber, 22 parts of zinc oxide and 10 parts of PU resin; 8 parts of 1, 4-butanediol; carbon black N22022 parts; carbon black N55018 parts; 6 parts of a plasticizer; 0.7 part of antioxidant MBZ; 1.2 parts of vulcanizing agent DCP.
1.2 the preparation method comprises the following steps: taking 1000g of nitrile rubber, 220g of zinc oxide, 100g of PU resin, 80g of 1, 4-butanediol, N220220 g of carbon black, N550180 g of carbon black, 60g of plasticizer, 7g of anti-aging agent MBZ and 12g of vulcanizing agent DCP, mixing and refining by using an internal mixer to prepare a rubber material, passing through an open mill for 3 times, pressing into a rubber sheet, and standing for 36 hours to obtain the nitrile rubber material.
Example 5
1.1. Preparing raw materials, wherein the raw materials comprise the following components in parts by mass: 100 parts of nitrile rubber, 27 parts of zinc oxide and 20 parts of PU resin; 13 parts of 1, 4-butanediol; 22027 parts of carbon black N; carbon black N55023 parts; 10 parts of a plasticizer; 1.2 parts of an anti-aging agent MBZ; 1.8 parts of vulcanizing agent DCP.
1.2 the preparation method comprises the following steps: taking 1000g of nitrile rubber, 270g of zinc oxide, 200g of PU resin, 130g of 1, 4-butanediol, N220270 g of carbon black, N550230 g of carbon black, 100g of plasticizer, 12g of anti-aging agent MBZ and 18g of vulcanizing agent DCP, mixing and refining by using an internal mixer to prepare a rubber material, passing through an open mill for 3 times, pressing into a rubber sheet, and standing for 36 hours to obtain the nitrile rubber material.
Claims (5)
1. The PU resin type wear-resistant nitrile rubber is characterized by comprising the following raw material components in parts by weight:
100 portions of nitrile rubber
22-27 parts of zinc oxide
10-20 parts of PU resin
Carbon black N22022-27 parts
Carbon black N55018-23 parts
8-13 parts of 1, 4-butanediol
6-10 parts of plasticizer
0.7-1.2 parts of antioxidant MBZ
1.2-1.8 parts of vulcanizing agent DCP.
2. The PU resin type abrasion-resistant nitrile rubber according to claim 1, wherein the nitrile rubber is nitrile rubber 6280.
3. The PU resin type abrasion-resistant nitrile rubber according to claim 1, wherein the PU resin is a polyurethane resin D3145.
4. The abrasion-resistant nitrile rubber of the PU resin type according to claim 1, wherein the plasticizer is dioctyl terephthalate.
5. The process for preparing the PU resin type abrasion-resistant nitrile rubber according to any one of claims 1 to 4, wherein the raw materials are prepared according to the proportion of the formula, mixed by an internal mixer to prepare a sizing material, passed through an open mill for several times, pressed into a film and placed for 36 to 48 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010702589.5A CN111777810A (en) | 2020-07-21 | 2020-07-21 | PU resin type wear-resistant nitrile rubber and preparation method thereof |
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| CN202010702589.5A CN111777810A (en) | 2020-07-21 | 2020-07-21 | PU resin type wear-resistant nitrile rubber and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113292841A (en) * | 2021-05-14 | 2021-08-24 | 广州市众智体育科技有限公司 | Base rubber cushion layer with good matching degree with polyurethane glue |
| CN113388161A (en) * | 2021-06-11 | 2021-09-14 | 鞍山市宏图防腐工程有限公司 | Nitrile rubber wear-resistant agent and preparation method and application thereof |
| CN117402418A (en) * | 2023-12-11 | 2024-01-16 | 河北润驰流体科技有限公司 | High-wear-resistance rubber hose and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292841A (en) * | 2021-05-14 | 2021-08-24 | 广州市众智体育科技有限公司 | Base rubber cushion layer with good matching degree with polyurethane glue |
| CN113388161A (en) * | 2021-06-11 | 2021-09-14 | 鞍山市宏图防腐工程有限公司 | Nitrile rubber wear-resistant agent and preparation method and application thereof |
| CN117402418A (en) * | 2023-12-11 | 2024-01-16 | 河北润驰流体科技有限公司 | High-wear-resistance rubber hose and preparation method thereof |
| CN117402418B (en) * | 2023-12-11 | 2024-02-27 | 河北润驰流体科技有限公司 | High-wear-resistance rubber hose and preparation method thereof |
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Application publication date: 20201016 |