CN113249022A - Preparation method of rubber belt rapid repairing material - Google Patents
Preparation method of rubber belt rapid repairing material Download PDFInfo
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- CN113249022A CN113249022A CN202110519221.XA CN202110519221A CN113249022A CN 113249022 A CN113249022 A CN 113249022A CN 202110519221 A CN202110519221 A CN 202110519221A CN 113249022 A CN113249022 A CN 113249022A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
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- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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Abstract
The invention discloses a preparation method of a rubber belt rapid repairing material, which comprises the steps of preparing a first component and a second component, mixing the first component and the second component according to the volume ratio of (0.8-1.2) to (0.8-1.2), and finally obtaining the repairing material; the first component is a prepolymer component which comprises 35-65 parts of isocyanate and 20-55 parts of polyether polyol by mass, the isocyanate is added into the polyether polyol under the condition of vacuum and low pressure, and the polyurethane prepolymer is obtained after uniform mixing and is stored by adopting nitrogen; the second component is a curing agent component which comprises 40-75 parts of polyether polyol, 10-30 parts of chain extender, 0-2 parts of catalyst, 0.1-2 parts of defoaming agent, 0.1-2 parts of thixotropic agent and 1-7 parts of filler in parts by mass, and the components are mixed together under the condition of vacuum low pressure to obtain the curing agent.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a preparation method of a rubber belt rapid repairing material.
Background
The rubber belt is a product which cannot be used or is deficient in daily life and industrial production at present, and particularly for industrial production, for example, the rubber belt is used as a common conveying crawler belt, so that the product can be effectively conveyed, the working efficiency is improved, but in the actual production process, the rubber belt is easily damaged due to the environment, and troubles are caused to the industrial production.
At present, the method for repairing the damaged rubber belt in the market is hot vulcanization repairing; the method is characterized in that a damaged part is treated, hot vulcanized rubber cement is coated on the damaged part, a rubber sheet is adhered on the damaged part, and the unvulcanized rubber sheet and a belt are integrated into a whole through heating and pressurizing by a vulcanizing machine, so that high-strength adhesion is realized. Although the hot vulcanization method is ideal, the process is complex, the operation time is long, the labor intensity is high, the requirement on a heat source is high during vulcanization in the hot vulcanization mode, the equipment is heavy, and the carrying is not facilitated; the process is complex, the time is long, and the influence of the ambient temperature and the humidity is large. The vulcanized part of the joint is easy to peel and crack; later on, although cold vulcanization occurred: the thin film rubber product is immersed into a gasoline solution containing 2% -4% of sulfur monochloride, and vulcanization can be completed within a few seconds to a few minutes, but the method has the defects that vulcanized rubber has poor performance and is particularly not aging-resistant, so that a rapid repairing mode for a rubber belt is developed, and the method is a problem to be solved urgently.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides the preparation method of the rubber belt rapid repairing material, the polyurethane belt is rapidly repaired without a special tool, the aging resistance and the wear resistance of the modified material exceed those of polyurethane, and the high polymer rubber repairing technology has obvious repairing effect on products with elastic characteristics, such as rubber, polyurethane linings, conveyor belts, belt pulleys, insulating layers and the like, which are damaged. And has the characteristics of wear resistance, corrosion resistance, strong flexibility, high elasticity, strong adhesive force, no sagging phenomenon caused by self-leveling, convenient construction, environmental protection and the like.
In order to achieve the aim, the invention provides a preparation method of a rubber belt rapid repairing material, which comprises the steps of preparing a first component and a second component, and then mixing the first component and the second component according to the volume ratio of (0.8-1.2) to finally obtain the repairing material;
the first component is a prepolymer component and comprises 35-65 parts of isocyanate and 20-55 parts of polyether polyol by mass, the isocyanate is added into the polyether polyol under the condition of vacuum and low pressure, and the polyurethane prepolymer is obtained after uniform mixing and is stored by adopting nitrogen;
the second component is a curing agent component which comprises 40-75 parts of polyether polyol, 10-30 parts of chain extender, 0-2 parts of catalyst, 0.1-2 parts of defoaming agent, 0.1-2 parts of thixotropic agent and 1-7 parts of filler by mass, and the components are mixed together under the condition of vacuum and low pressure to obtain the curing agent.
Preferably, in the first component, the isocyanate is one or more of toluene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, hexamethylene diisocyanate and modified products thereof; the polyether polyol has the molecular weight of 1000-6000 and the functionality of 2-3, and is one or a mixture of propylene oxide polyether and polytetrahydrofuran polyether.
Preferably, in the second component, the polyether polyol has a molecular weight of 1000-6000 and a functionality of 2-3, and is one or a mixture of propylene oxide polyether and polytetrahydrofuran polyether.
Preferably, in the second component, the chain extender is one of trimethylolpropane, 1, 4-butanediol, triisopropanolamine, dihydroxyisopropylaniline, hydroquinone dihydroxyethyl ether and 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, diethyltoluenediamine and dimethylthiotoluenediamine.
Preferably, in the second component, the catalyst is one or more of an organotin catalyst, an organic heavy metal catalyst and an organic amine catalyst.
Preferably, in the second component, the defoaming agent is an organic silicon defoaming agent; the thixotropic agent is BYK-410 and DeuRheo 2810, and the filler is one or more of titanium dioxide, carbon black, mica powder, hydrotalcite and fumed silica.
Preferably, the preparation method of the polyurethane prepolymer is as follows: adding polyether polyol into a reaction device, stirring and heating to 120 ℃ with stirring, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding isocyanate in a metering manner, gradually heating to 80-90 ℃, reacting for 4-5h, cooling to room temperature, discharging N2, and sealing and storing to obtain the polyurethane prepolymer.
Preferably, adding the polyether polyol and the chain extension crosslinking agent into a reaction device, stirring and heating to 110-120 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding the catalyst, the defoaming agent, the thixotropic agent and the filler, stirring uniformly, sealing and storing to obtain the curing agent.
The invention has the beneficial effects that: according to the preparation method of the rubber belt rapid modification material, the two components are prepared separately and mixed during use, so that the polyurethane prepolymer can be stored and used for a long time; meanwhile, the first component and the second component both contain polyether polyol, so that the polyether polyol can be better dissolved together during mixing, the integrity of the finally obtained product is stronger, and no sagging phenomenon is generated.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
In order to more clearly express the present invention, the present invention will be further described below with reference to examples.
Referring to fig. 1, the invention discloses a preparation method of a rubber belt rapid repair material, which comprises preparing a first component and a second component, and then mixing the first component and the second component according to a volume ratio of (0.8-1.2) to obtain the repair material;
the first component is a prepolymer component and comprises 35-65 parts of isocyanate and 20-55 parts of polyether polyol by mass, the isocyanate is added into the polyether polyol under the condition of vacuum and low pressure, and the polyurethane prepolymer is obtained after uniform mixing and is stored by adopting nitrogen;
the second component is a curing agent component which comprises 40-75 parts of polyether polyol, 10-30 parts of chain extender, 0-2 parts of catalyst, 0.1-2 parts of defoaming agent, 0.1-2 parts of thixotropic agent and 1-7 parts of filler by mass, and the components are mixed together under the condition of vacuum and low pressure to obtain the curing agent. In the embodiment, the first component and the second component are prepared separately, the first component is set as a polyurethane prepolymer, the second component is set as a curing agent, particularly, a chain extender is added into the second component, a hard segment is formed by the chain extender and a molecular chain is extended, and after the first component and the second component are mixed, active H in the chain extender reacts with-NCO in the prepolymer in the curing process, so that the whole isocyanate has a sealing effect, and the whole product is more corrosion-resistant and wear-resistant; in addition, the first component and the second component both contain polyether polyol, so that when the first component and the second component are mixed, the two components are easily combined together due to the principle of similar phase solubility, and the second component with the curing effect is combined with the polyurethane prepolymer to achieve the purpose of rapid curing.
In the first component, the isocyanate is one or more of toluene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, hexamethylene diisocyanate and modified substances thereof; the polyether polyol has the molecular weight of 2000-6000 and the functionality of 2-3, and is one or the mixture of propylene oxide polyether and polytetrahydrofuran polyether. In a specific embodiment, the selected polyether polyol has a molecular weight of not less than 1000, and the higher the molecular weight, the stronger the intermolecular force, so that the polyether polyol and the isocyanate can be combined more tightly whether combined or combined as the first component and the second component; in addition, the functionality of the polyether polyol is 2-3, and the isocyanate matched with the polyether polyol also has the same number of functionalities, so that the polyether polyol and the isocyanate are combined in pairs, and the obtained polyurethane prepolymer is ensured to be combined more stably.
In the second component, the polyether polyol has the molecular weight of 1000-6000 and the functionality of 2-3, and is one or a mixture of propylene oxide polyether and polytetrahydrofuran polyether; the chain extender is one of trimethylolpropane, 1, 4-butanediol, triisopropanolamine, dihydroxyisopropylaniline, hydroquinone dihydroxyethyl ether and 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, diethyl toluenediamine and dimethyl-thio toluenediamine; in the second component, the catalyst is one or more of an organic tin catalyst, an organic heavy metal catalyst and an organic amine catalyst, and in the second component, the defoaming agent is an organic silicon defoaming agent; the thixotropic agent is BYK-410 and DeuRheo 2810, and the filler is one or more of titanium dioxide, carbon black, mica powder, hydrotalcite and fumed silica;
the preparation method of the polyurethane prepolymer comprises the following steps: adding polyether polyol into a reaction device, stirring and heating to 120 ℃ with stirring, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding isocyanate in a metering manner, gradually heating to 80-90 ℃, reacting for 4-5h, cooling to room temperature, discharging N2, and sealing and storing to obtain the polyurethane prepolymer. Adding polyether polyol and a chain extension cross-linking agent into a reaction device, stirring and heating to 110-120 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding a catalyst, a defoaming agent, a thixotropic agent and a filler, stirring uniformly, and sealing and storing to obtain the curing agent. When the adhesive is used, the polyurethane prepolymer and the curing agent are mixed according to the volume ratio of 1:1, and the mixture is coated on a damaged area of a rubber belt, so that rapid repair can be realized.
The invention is illustrated below by means of specific examples:
example 1
(1) Adding 44.5 parts of epoxypropane polyether polyol (Mn is 6000 and f is 3) into a reaction device, stirring and heating to 115 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding 55.5 parts of diphenylmethane diisocyanate (MDI-50), gradually heating to 85 ℃, reacting for 4h, cooling to room temperature, discharging N2, and sealing and storing to obtain a polyurethane prepolymer A component with the NCO content of 17.7%.
(2) Adding 38 parts of propylene oxide polyether polyol (Mn is 6000, f is 3), 32 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) and 15 parts of 1, 4-butanediol into a reaction device, stirring and heating to 115 ℃, dehydrating for 2 hours under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding 1.5 parts of stannous octoate, 1.5 parts of BYK-066N, 1 part of BYK-410, 2 parts of carbon black, 2 parts of hydrotalcite and 2 parts of white carbon black, stirring uniformly, and sealing and storing to obtain the curing agent B component.
(3) A, B components are mixed according to the volume ratio of 1:1, poured into a mold, cured at room temperature for 7d, and then subjected to performance test.
Example 2
(1) Adding 44 parts of polytetrahydrofuran polyether polyol (Mn is 2000, f is 2) into a reaction device, stirring and heating to 115 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding 56 parts of diphenylmethane diisocyanate (MDI-50), gradually heating to 85 ℃, reacting for 4h, cooling to room temperature, and discharging N2Sealing and storing to obtain the component A of the polyurethane prepolymer, wherein the NCO content is 17.0%.
(2) Adding 16 parts of propylene oxide polyether polyol (Mn is 6000, f is 3), 56 parts of polytetrahydrofuran polyether polyol (Mn is 2000, f is 2) and 15 parts of 1, 4-butanediol into a reaction device, stirring and heating to 115 ℃, dehydrating for 2 hours under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding 1.5 parts of stannous octoate, 1.5 parts of BYK-066N, 1 part of BYK-410, 2 parts of carbon black and 2 parts of titanium dioxide, uniformly stirring, and sealing and storing to obtain the curing agent B component.
(3) A, B components are mixed according to the volume ratio of 1:1, poured into a mold, cured at room temperature for 7d, and then subjected to performance test.
Example 3
(1) Adding 59.5 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) into a reaction device, stirring and heating to 115 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, adding 40.5 parts of toluene diisocyanate (TDI-80), gradually heating to 85 ℃, reacting for 4h, cooling to room temperature, and discharging N2Sealing and storing to obtain the component A of the polyurethane prepolymer, wherein the NCO content is 14.5 percent.
(2) Adding 58 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) and 30 parts of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane into a reaction device, stirring and heating to 120 ℃, dehydrating for 2 hours under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding 0.5 part of stannous octoate, 1.5 parts of Tech-367N, 1 part of DeuRheo 2810, 2 parts of carbon black and 2 parts of mica, uniformly stirring, and sealing for storage to obtain the curing agent B component.
(3) A, B components are mixed according to the volume ratio of 1:1, poured into a mold, cured at room temperature for 7d, and then subjected to performance test.
Example 4
(1) Adding 46 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) into a reaction device, stirring and heating to 115 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding 54 parts of diphenylmethane diisocyanate (MDI-50), gradually heating to 85 ℃, reacting for 4h, cooling to room temperature, and discharging N2Sealing and storing to obtain the component A of the polyurethane prepolymer, wherein the NCO content is 14.3 percent.
(2) Adding 71 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) and 17 parts of diethyltoluenediamine into a reaction device, stirring and heating to 110 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding 1 part of Demodex 6500, 1 part of DeuRheo 2810, 2 parts of carbon black, 2 parts of mica and 1 part of white carbon black, stirring uniformly, and sealing and storing to obtain the curing agent B component.
(3) A, B components are mixed according to the volume ratio of 1:1, poured into a mold, cured at room temperature for 7d, and then subjected to performance test.
Example 5
(1) Adding 56 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) into a reaction device, stirring and heating to 115 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding 20 parts of toluene diisocyanate (TDI-80) and 24 parts of naphthalene diisocyanate, gradually heating to 85 ℃, reacting for 4h, cooling to room temperature, and discharging N2Sealing and storing to obtain the component A of the polyurethane prepolymer, wherein the NCO content is 14.5 percent.
(2) Adding 58 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) and 30 parts of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane into a reaction device, stirring and heating to 120 ℃, dehydrating for 2 hours under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding 0.5 part of stannous octoate, 1.5 parts of Delume 5300, 1 part of DeuRheo 2810, 2 parts of carbon black and 2 parts of mica, uniformly stirring, and sealing and storing to obtain the curing agent B component.
(3) A, B components are mixed according to the volume ratio of 1:1, poured into a mold, cured at room temperature for 7d, and then subjected to performance test.
Comparative example 1
(1) Adding 50 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) into a reaction device, stirring and heating to 115 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding 50 parts of diphenylmethane diisocyanate (MDI-50), gradually heating to 85 ℃, reacting for 4h, cooling to room temperature, and discharging N2Sealing and storing to obtain the component A of the polyurethane prepolymer, wherein the NCO content is 12.6 percent.
(2) Adding 70 parts of amino-terminated polyether (Mn 2000, f 2) and 17 parts of diethyl toluenediamine into a reaction device, stirring and heating to 110 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding 1 part of Demodex 6500, 1 part of DeuRheo 2810, 2 parts of carbon black, 2 parts of mica and 1 part of white carbon black, stirring uniformly, and sealing and storing to obtain the curing agent B component.
(3) A, B components are mixed according to the volume ratio of 1:1 and poured into a mould.
Comparative example 2
(1) Adding 66 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) into a reaction device, stirring and heating to 115 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding 34 parts of toluene diisocyanate (TDI-80), gradually heating to 85 ℃, reacting for 4h, cooling to room temperature, and discharging N2Sealing and storing to obtain the component A of the polyurethane prepolymer, wherein the NCO content is 10.86%.
(2) Adding 75 parts of polytetrahydrofuran polyether polyol (Mn is 1000, f is 2) and 15 parts of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane into a reaction device, stirring and heating to 120 ℃, dehydrating for 2 hours under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, sequentially adding 0.5 part of stannous octoate, 1.5 parts of Tech-367N, 1 part of DeuRheo 2810, 2 parts of carbon black and 2 parts of mica, uniformly stirring, and sealing for storage to obtain the curing agent B component.
(3) A, B components are mixed according to the volume ratio of 1:1, poured into a mold, cured at room temperature for 7d, and then subjected to performance test.
The results of the performance test of the rubber tape quick repair materials obtained in examples 1 to 5 and comparative examples 1 to 2 are shown in the following table.
Where "/" indicates none.
As can be seen from the comparison of the ingredients in the examples and the comparative examples, the addition and the addition of different ingredients affect different performances, and for the repair of rubber, not only the requirement of quick drying but also the requirement of certain strength and tensile strength need to be met, while the ingredients adopted in the application have certain difference between the strength or elongation and the comparative examples, but the tear strength and the tensile strength are far from those of the comparative examples, and when the rubber belt is used, the tear strength and the tensile strength are indispensable, so the application effect is far better than that of the comparative examples.
The embodiments of the present invention are merely illustrative and not restrictive, and those skilled in the art can modify the embodiments without inventive contribution as required after reading the present specification, but the present invention is protected by patent law within the scope of the appended claims.
Claims (8)
1. A preparation method of a rubber belt rapid repairing material is characterized by preparing a first component and a second component, then mixing the first component and the second component according to the volume ratio of (0.8-1.2) to finally obtain the repairing material;
wherein the first component is a prepolymer component which comprises 35-65 parts of isocyanate and 20-55 parts of polyether polyol by mass, and is preserved by adopting nitrogen;
the second component is a curing agent component which comprises 40-75 parts of polyether polyol, 10-30 parts of chain extender, 0-2 parts of catalyst, 0.1-2 parts of defoaming agent, 0.1-2 parts of thixotropic agent and 1-7 parts of filler by mass, and the components are mixed together under the condition of vacuum and low pressure to obtain the curing agent.
2. The method for preparing the rubber belt rapid repair material according to claim 1, wherein in the first component, the isocyanate is one or more of toluene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, hexamethylene diisocyanate, and modifications thereof; the polyether polyol has the molecular weight of 1000-6000 and the functionality of 2-3, and is one or a mixture of propylene oxide polyether and polytetrahydrofuran polyether.
3. The method for preparing the rubber belt rapid repair material as claimed in claim 1, wherein in the second component, the polyether polyol has a molecular weight of 1000-6000 and a functionality of 2-3, and is one or a mixture of propylene oxide polyether and polytetrahydrofuran polyether.
4. The method of claim 1, wherein the chain extender is one of trimethylolpropane, 1, 4-butanediol, triisopropanolamine, dihydroxyisopropylaniline, hydroquinone dihydroxyethyl ether, and 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, diethyltoluenediamine, and dimethylthiotoluenediamine.
5. The method for preparing the rubber belt rapid-repairing material of claim 1, wherein in the second component, the catalyst is one or more of an organic tin catalyst, an organic heavy metal catalyst and an organic amine catalyst.
6. The method for preparing the rubber belt rapid repair material according to claim 1, wherein in the second component, the defoaming agent is a silicone defoaming agent; the thixotropic agent is BYK-410 and DeuRheo 2810, and the filler is one or more of titanium dioxide, carbon black, mica powder, hydrotalcite and fumed silica.
7. The method for preparing the rubber belt rapid repair material according to claim 1, wherein the method for preparing the polyurethane prepolymer comprises the following steps: adding polyether polyol into a reaction device, stirring and heating to 110-120 ℃, dehydrating for 2h under the condition that the vacuum degree is-0.095 MPa, stopping vacuumizing, cooling to 50 ℃, then adding isocyanate in a metering manner, gradually heating to 80-90 ℃, reacting for 4-5h, cooling to room temperature, and discharging N2Sealing and storing to obtain the polyurethane prepolymer.
8. The method for preparing the rubber belt rapid repair material as claimed in claim 1, wherein the polyether polyol and the chain extension crosslinking agent are added into a reaction device, stirred and heated to 110-120 ℃, and dehydrated for 2 hours under the condition that the vacuum degree is-0.095 MPa, the vacuumizing is stopped, the temperature is reduced to 50 ℃, the catalyst, the antifoaming agent, the thixotropic agent and the filler are sequentially added, stirred uniformly, sealed and stored to obtain the curing agent.
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