CN112458759B - Water-based hydrogenated nitrile butadiene rubber impregnation liquid for oil-resistant and heat-resistant synchronous belt, preparation method of impregnation liquid and preparation process of impregnated cloth - Google Patents
Water-based hydrogenated nitrile butadiene rubber impregnation liquid for oil-resistant and heat-resistant synchronous belt, preparation method of impregnation liquid and preparation process of impregnated cloth Download PDFInfo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/20—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with polyhydric phenols
- C08G8/22—Resorcinol
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/395—Isocyanates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
- D06M15/41—Phenol-aldehyde or phenol-ketone resins
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/55—Epoxy resins
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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention provides a water-based hydrogenated nitrile rubber dipping solution for an oil-resistant and heat-resistant synchronous belt, a preparation method thereof and a preparation process of dipped cloth, wherein the dipping solution comprises the following components in parts by weight: 100 parts of latex; 5-20 parts of resorcinol; 2-10 parts of formaldehyde; 0.1-1 part of alkaline catalyst; 2-10 parts of a tackifier; 2-10 parts of water-based carbon black; 50-200 parts of soft water; wherein the latex is HNBR and/or HXNBR; the molar ratio of formaldehyde to resorcinol is 0.5. The water-based hydrogenated nitrile butadiene rubber dipping solution provided by the invention does not use an organic solvent, has lower viscosity and stronger permeability to fiber base cloth; the preparation method of the impregnation solution is disclosed; the dipped fabric prepared by the dipping solution has good adhesive property and elasticity, and the static and dynamic properties of the synchronous belt can be improved.
Description
Technical Field
The invention relates to the technical field of gum dipping solution and gum dipping cloth, in particular to water-based hydrogenated nitrile butadiene rubber gum dipping solution for an oil-resistant and heat-resistant synchronous belt, a preparation method thereof and a preparation process of gum dipping cloth.
Background
Hydrogenated nitrile rubber (HNBR) has good oil resistance, excellent heat resistance, weather resistance and chemical stability, and a small amount of remaining unsaturated double bonds can participate in vulcanization crosslinking and improve the compression set of vulcanized rubber. Meanwhile, the hydrogenated nitrile rubber has the characteristics of high strength, high tearing performance, excellent wear resistance and the like, and is one of rubbers with extremely excellent comprehensive performance.
At present, domestic synchronous belt manufacturing enterprises with a certain scale all have synchronous belt production taking HNBR as a base material, so that the synchronous belt manufacturing enterprises also have corresponding requirements on HNBR treatment rubberized fabric. The HNBR rubberized fabric in the prior art usually adopts the technology of HNBR rubber glue solution flooding, uses a large amount of organic solvents in its course of working, has the risk in the aspect of environmental protection and safety, and the storage of rubberized fabric is short for an expiry date, and manufacturing cost is higher.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the water-based hydrogenated nitrile rubber dipping solution for the oil-resistant and heat-resistant synchronous belt, which does not use an organic solvent, has lower viscosity and stronger permeability to fiber-based cloth; the invention also provides a preparation method of the impregnation liquid; the dipped fabric prepared by the dipping solution has good bonding performance and elasticity, and the static and dynamic performance of the synchronous belt can be improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to the first aspect of the invention, the water-based hydrogenated nitrile rubber dipping solution for the oil-resistant and heat-resistant synchronous belt comprises the following components in parts by weight:
wherein the latex is HNBR and/or HXNBR;
the molar ratio of the formaldehyde to the resorcinol is 0.5.
Further, the concentration of formaldehyde is 37%.
Further, the basic catalyst is alkali metal hydroxide or ammonia water.
Further, the tackifier is a water-based blocked isocyanate or epoxy resin.
The preparation method of the water-based hydrogenated nitrile rubber dipping solution for the oil-resistant and heat-resistant synchronous belt of the embodiment of the second aspect of the invention comprises the following steps:
step 01, sequentially adding soft water and a catalyst into a first reaction kettle, and stirring to fully dissolve the catalyst;
step 02, adding resorcinol into the first reaction kettle, and stirring until the resorcinol and the resorcinol are uniformly mixed;
03, adding formaldehyde into the first reaction kettle, controlling the reaction temperature to be 5-35 ℃, and polymerizing for 4-8 hours to obtain an RF liquid;
step 04, adding the tackifier and the latex into a second reaction kettle, and stirring until the tackifier and the latex are uniformly mixed to obtain thickened latex;
step 05, adding the RF liquid prepared in the step 03 into the thickening latex in a stirring state;
and step 06, after the materials in the second reaction kettle are uniformly mixed, adding water-based carbon black into the mixture and uniformly stirring the mixture to obtain the water-based hydrogenated nitrile butadiene rubber impregnation liquid for the oil-resistant heat-resistant synchronous belt.
Further, the reaction temperature in step 03 is 20 to 30 ℃.
Further, the pH at the end of the reaction in step 03 is controlled to 6 to 10.
The preparation process of the impregnated cloth provided by the embodiment of the third aspect of the invention comprises the following specific steps: soaking the fiber base cloth into the dipping solution, and pressing the fiber base cloth through a press roller to form wet dipping cloth; and then putting the wet impregnated cloth into an oven, drying for 20-30S at 110-220 ℃, reacting for 60-90S, taking out and cooling to obtain the impregnated cloth.
Compared with the prior art, the invention has the beneficial technical effects that: according to the water-based hydrogenated nitrile rubber dipping solution for the oil-resistant and heat-resistant synchronous belt and the preparation method thereof, the water-based HNBR latex is adopted to replace the traditional solvent-based HNBR rubber solution, no benzene/ketone organic solvent is used in the preparation process, and compared with the solvent-based dipping solution, the water-based dipping solution has lower viscosity and stronger permeability to fiber-based cloth; the HNBR latex has good bonding property and good extensibility after film forming, and the molar ratio of phenolic aldehyde in the formula and the proportion of the latex are adjusted, so that the prepared gum dipping solution has good stability and bonding property, and the formed gum film also has excellent elasticity; the invention also provides a preparation process for preparing the impregnated cloth by using the impregnation liquid, the impregnated cloth prepared by the process has higher adhesive strength and lower constant elongation load, the storage period of the product is greatly prolonged, and the invention is an innovation with social benefit and economic benefit in the field of the driving belt adhesive tape.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Example 1
Sequentially adding 135.8 parts of soft water and 0.2 part of sodium hydroxide into the first reaction kettle, and stirring to fully dissolve the sodium hydroxide; adding 7.1 parts of resorcinol into a reaction kettle, and stirring until the resorcinol and the resorcinol are uniformly mixed; then adding 2.6 parts of (37%) formaldehyde into the first reaction kettle, controlling the reaction temperature to be 20-30 ℃, and polymerizing for 6 hours to obtain RF liquid;
adding 8.77 parts of epoxy resin and 250 parts of (40%) HXNBR latex into a second reaction kettle, and stirring until the epoxy resin and the (40%) HXNBR latex are uniformly mixed to obtain thickened latex; adding RF liquid to the thickened latex with stirring; and after the materials in the second reaction kettle are uniformly mixed, adding 28.6 parts of water-based carbon black into the mixture, and uniformly stirring to obtain the water-based hydrogenated nitrile butadiene rubber dipping solution for the oil-resistant heat-resistant synchronous belt.
Example 2
Sequentially adding 130.6 parts of soft water and 0.2 part of sodium hydroxide into the first reaction kettle, and stirring to fully dissolve the sodium hydroxide; adding 7.1 parts of resorcinol into a reaction kettle, and stirring until the resorcinol and the resorcinol are uniformly mixed; then adding 7.8 parts of (37%) formaldehyde into the first reaction kettle, controlling the reaction temperature to be 20-30 ℃, and polymerizing for 6 hours to obtain RF liquid;
adding 8.77 parts of epoxy resin and 250 parts of (40%) HXNBR latex into a second reaction kettle, and stirring until the epoxy resin and the (40%) HXNBR latex are uniformly mixed to obtain thickened latex; adding the RF liquid to the thickened latex with stirring; and after the materials in the second reaction kettle are uniformly mixed, adding 28.6 parts of water-based carbon black into the second reaction kettle, and uniformly stirring to obtain the water-based hydrogenated nitrile butadiene rubber impregnation liquid for the oil-resistant and heat-resistant synchronous belt.
Example 3
Adding 125.4 parts of soft water and 0.2 part of sodium hydroxide into the first reaction kettle in sequence, and stirring to fully dissolve the sodium hydroxide; adding 7.1 parts of resorcinol into a reaction kettle, and stirring until the resorcinol and the resorcinol are uniformly mixed; 13 parts of formaldehyde (37%) is added into the first reaction kettle, the reaction temperature is controlled to be 20-30 ℃, and polymerization is carried out for 6 hours, so as to obtain RF liquid;
adding 8.77 parts of epoxy resin and 250 parts of (40%) HXNBR latex into a second reaction kettle, and stirring until the epoxy resin and the (40%) HXNBR latex are uniformly mixed to obtain thickened latex; adding RF liquid to the thickened latex with stirring; and after the materials in the second reaction kettle are uniformly mixed, adding 28.6 parts of water-based carbon black into the mixture, and uniformly stirring to obtain the water-based hydrogenated nitrile butadiene rubber dipping solution for the oil-resistant heat-resistant synchronous belt.
Example 4
Adding 130.6 parts of soft water and 0.2 part of sodium hydroxide into the first reaction kettle in sequence, and stirring to fully dissolve the sodium hydroxide; adding 7.1 parts of resorcinol into a reaction kettle, and stirring until the resorcinol and the resorcinol are uniformly mixed; then adding 7.8 parts of (37%) formaldehyde into the first reaction kettle, controlling the reaction temperature to be 20-30 ℃, and polymerizing for 6 hours to obtain RF liquid;
adding 8.77 parts of epoxy resin and 250 parts (50/50W/W) of (40%) HNBR + HXNBR mixed latex into a second reaction kettle, and stirring until the mixture is uniformly mixed to obtain thickened latex; adding RF liquid to the thickened latex with stirring; and after the materials in the second reaction kettle are uniformly mixed, adding 28.6 parts of water-based carbon black into the mixture, and uniformly stirring to obtain the water-based hydrogenated nitrile butadiene rubber dipping solution for the oil-resistant heat-resistant synchronous belt.
Comparative example
Sequentially adding 130.6 parts of soft water and 0.2 part of sodium hydroxide into the first reaction kettle, and stirring to fully dissolve the sodium hydroxide; adding 7.1 parts of resorcinol into a reaction kettle, and stirring until the resorcinol and the resorcinol are uniformly mixed; then adding 7.8 parts of (37%) formaldehyde into the first reaction kettle, controlling the reaction temperature to be 20-30 ℃, and polymerizing for 6 hours to obtain RF liquid;
adding 8.77 parts of epoxy resin and 250 parts of (40%) butyronitrile latex into a second reaction kettle, and stirring until the epoxy resin and the (40%) butyronitrile latex are uniformly mixed to obtain thickened latex; adding RF liquid to the thickened latex with stirring; and after the materials in the second reaction kettle are uniformly mixed, adding 28.6 parts of water-based carbon black into the second reaction kettle, and uniformly stirring to obtain the water-based hydrogenated nitrile butadiene rubber impregnation liquid for the oil-resistant and heat-resistant synchronous belt.
The RFL glue solutions prepared in the examples 1-4 and the comparative example are respectively adopted to prepare standard sample cloth, and the specific steps are as follows: soaking the fiber base cloth into a dipping solution, and pressing the fiber base cloth through a press roller to form wet dipping cloth; and then, putting the wet impregnated cloth into an oven, drying for 20-30S at 110-220 ℃, reacting for 60-90S, taking out and cooling to obtain the standard sample cloth of the impregnated cloth.
The standard sample cloths prepared from the RFL glue solutions prepared in the examples 1 to 4 and the comparative example are respectively subjected to performance tests, and the test structures are as follows:
table 1 is a table for testing the performance of the RFL glue solutions of examples 1-4 and comparative examples
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example | |
| Adhesive strength N | 137 | 187 | 162 | 157 | 111 |
| 50% definite elongation N | 184 | 219 | 237 | 244 | 249 |
As can be seen from Table 1, the sample fabrics processed by the impregnation solutions prepared in examples 1 to 4 have higher adhesive strength and constant elongation load of bottom crossing, the service life of the impregnated fabrics is prolonged, the processing property is improved, and the production and use costs are reduced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. The water-based hydrogenated nitrile rubber dipping solution for the oil-resistant heat-resistant synchronous belt is characterized by comprising the following components in parts by weight:
100 parts of latex;
5-20 parts of resorcinol;
2-10 parts of formaldehyde;
0.1-1 part of alkaline catalyst;
2-10 parts of a tackifier;
2-10 parts of water-based carbon black;
50-200 parts of soft water;
wherein the latex is HNBR and/or HXNBR;
the molar ratio of said formaldehyde to said resorcinol is 0.5; the tackifier is water-based blocked isocyanate or epoxy resin;
the preparation method comprises the following steps: step 01, sequentially adding soft water and a catalyst into a first reaction kettle, and stirring to fully dissolve the catalyst;
step 02, adding resorcinol into the first reaction kettle, and stirring until the resorcinol and the resorcinol are uniformly mixed;
03, adding formaldehyde into the first reaction kettle, controlling the reaction temperature to be 5-35 ℃, and polymerizing for 4-8 hours to obtain RF liquid;
step 04, adding the tackifier and the latex into a second reaction kettle, and stirring until the tackifier and the latex are uniformly mixed to obtain thickened latex;
step 05, adding the RF liquid prepared in the step 03 into the thickening latex in a stirring state;
and 06, after the materials in the second reaction kettle are uniformly mixed, adding water-based carbon black into the mixture and uniformly stirring the mixture to obtain the water-based hydrogenated nitrile butadiene rubber dipping solution for the oil-resistant heat-resistant synchronous belt.
2. The water-based hydrogenated nitrile rubber dip for oil and heat resistant synchronous belt according to claim 1, wherein the concentration of formaldehyde is 37%.
3. The water-based hydrogenated nitrile rubber dipping solution for oil and heat resistant synchronous belts according to claim 1, wherein the basic catalyst is alkali metal hydroxide or ammonia water.
4. The water-based hydrogenated nitrile rubber dipping solution for oil-resistant and heat-resistant synchronous belts as claimed in claim 1, wherein the reaction temperature in step 03 is 20-30 ℃.
5. The water-based hydrogenated nitrile rubber dipping solution for oil-resistant and heat-resistant synchronous belts according to claim 1, wherein the pH at the end of the reaction in step 03 is controlled to be 6-10.
6. A preparation process of the dipped fabric is characterized by comprising the following specific steps: immersing the fiber base cloth into the dipping solution according to any one of claims 1 to 5, and performing rubber pressing on the fiber base cloth through a press roller to form wet dipped cloth; and then putting the wet impregnated cloth into an oven, drying for 20-30S at 110-220 ℃, reacting for 60-90S, taking out and cooling to obtain the impregnated cloth.
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| CN202011085135.4A CN112458759B (en) | 2020-10-12 | 2020-10-12 | Water-based hydrogenated nitrile butadiene rubber impregnation liquid for oil-resistant and heat-resistant synchronous belt, preparation method of impregnation liquid and preparation process of impregnated cloth |
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| CN202011085135.4A CN112458759B (en) | 2020-10-12 | 2020-10-12 | Water-based hydrogenated nitrile butadiene rubber impregnation liquid for oil-resistant and heat-resistant synchronous belt, preparation method of impregnation liquid and preparation process of impregnated cloth |
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