An asphaltene-modified polyurethane damping composite and a method of making the same

Abstract

The present application relates to the technical field of polymer damping material, and particularly relates to a bituminous substance modified polyurethane damping composite material and a preparation method thereof. The preparation method of the bituminous substance modified polyurethane damping composite material adjusts the type, content and combination form of the bituminous substance and the polyurethane material, prepares different types of polyurethane materials, determines the optimal modification route of the bituminous substance modified polyurethane material and the damping performance, improves the damping performance of the polyurethane, and widens the use environment of the damping material.

Description

Technical Field

[0001] This invention relates to the field of polymer damping materials technology, specifically to an asphalt-modified polyurethane damping composite material and its preparation method. Background Technology

[0002] With the continuous advancement of science and technology, the widespread installation and use of various high-performance equipment is also increasing. While these devices meet and enhance the performance of various products, they also lead to vibration and noise problems. The increasingly serious vibration and noise issues not only affect the stability, safety, and lifespan of equipment, but also adversely impact the operating environment. Therefore, reducing vibration and noise has become a core issue that urgently needs to be addressed for all types of equipment.

[0003] Using materials with damping and sound insulation functions has proven to be the simplest and most effective way to reduce vibration noise. Polymer damping materials belong to the viscoelastic damping materials category, combining the energy loss characteristics of certain viscous liquids under certain flow conditions with the energy storage characteristics of elastic solid materials. There are many types of polymer damping materials, among which polyurethane-based damping materials are among the earliest and most thoroughly studied. This is because polyurethane itself possesses a large number of hydrogen bonds, a certain degree of microphase separation structure, and a high damping loss factor.

[0004] However, the damping performance of existing polyurethane materials is still insufficient to meet the damping requirements of various equipment and special vibration reduction applications. Therefore, a high-performance asphalt-modified polyurethane damping composite material needs to be designed. Summary of the Invention

[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an asphalt-modified polyurethane damping composite material and its preparation method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an asphalt-modified polyurethane damping composite material, comprising the following raw material components in the following weight ratios: 65-75 parts of polyurethane prepolymer, 25-35 parts of crosslinking agent and chain extender, 1-5 parts of asphaltene, and 0.1-0.5 parts of solvent.

[0007] Furthermore, the polyurethane prepolymer is synthesized from aromatic isocyanates, polyether polyols, or polyester polyols.

[0008] Furthermore, the crosslinking agent is a small molecule with multifunctionality, containing alcohols or amines; the chain extender is a small molecule compound of diamines.

[0009] Furthermore, asphaltenes are extracts from crude oil and bitumen.

[0010] Furthermore, the solvent was analytical grade toluene.

[0011] A method for preparing an asphaltene-modified polyurethane damping composite material, wherein the method for preparing the above-mentioned asphaltene-modified polyurethane damping composite material is as follows:

[0012] S1. Grind the extracted asphalt into powder and add it to a beaker along with the crosslinking agent and chain extender. Stir at 100-150 r / min for 10-20 min.

[0013] S2. Add the polyurethane prepolymer to the beaker containing the mixture from step S1 and stir manually for 5-8 minutes.

[0014] S3. Place the mixture prepared in step S2 into a vacuum drying oven and vacuum it at room temperature for 7-10 minutes. Then quickly pour it into a polytetrafluoroethylene mold and vacuum it at room temperature for 10-20 minutes. After removing it, place it in an oven to cure it and obtain the asphalt-modified polyurethane damping composite material.

[0015] Furthermore, it also includes the extraction of asphaltenes, the extraction of asphaltenes including...

[0016] S101. Extracting asphalt from the raw material through an extraction experiment: Weigh an appropriate amount of sample into a ground glass distillation flask, add a certain amount of n-heptane to the sample, boil it with a reflux condenser, then remove the distillation flask, stopper it, and let it stand at room temperature for 2-3 hours.

[0017] S102. Place the filter paper in the glass funnel and pour the solution into the filter paper without stirring. Then rinse the inner wall of the distillation flask with hot n-heptane. Filter all the washing liquid through the filter paper and set the distillation flask aside for later use.

[0018] S103. Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux and extract with a certain amount of n-heptane. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time is 4-6 hours.

[0019] S104. Replace the original distillation flask, add toluene, and continue refluxing until all the bitumen is removed from the paper.

[0020] S105. Distill toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until all the toluene is evaporated to obtain asphalt.

[0021] Furthermore, the mass-to-volume (g / mL) ratio of the sample to n-heptane was 80-85:100.

[0022] Furthermore, the ratio of polyurethane prepolymer to crosslinking agent and chain extender is 2.0-2.5:1.

[0023] Furthermore, in step S3, the curing temperature is 80-85℃ and the curing time is 10-12h.

[0024] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention has low preparation cost, stable and easy-to-operate preparation process, and can realize industrial production.

[0026] 2. This invention prepares different types of polyurethane materials by adjusting the type and content of asphaltene and the combination form of asphaltene and polyurethane materials, determines the optimal modification route for asphaltene-modified polyurethane materials and their damping properties, and the prepared composite materials improve the damping performance of polyurethane and broaden the application environment of damping materials. Attached Figure Description

[0027] Figure 1 This is a flowchart illustrating the preparation method of the asphalt-modified polyurethane damping composite material in a preferred embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] A bituminous modified polyurethane damping composite material comprises the following raw material components in the indicated weight ratios: 65-75 parts polyurethane prepolymer, 25-35 parts crosslinking agent and chain extender, 1-5 parts bituminous material, and 0.1-0.5 parts solvent. The polyurethane prepolymer is synthesized from aromatic isocyanate, polyether polyol, or polyester polyol; the crosslinking agent is a small molecule with multifunctionality containing alcohol or amine; the chain extender is a diamine small molecule compound; the bituminous material is an extract from crude oil and asphalt; and the solvent is analytical grade toluene.

[0030] like Figure 1 As shown, a method for preparing an asphaltene-modified polyurethane damping composite material is described below.

[0031] S1. Grind the extracted asphalt into powder and add it to a beaker along with the crosslinking agent and chain extender. Stir at 100-150 r / min for 10-20 min.

[0032] S2. Add the polyurethane prepolymer to the beaker containing the mixture from step S1 and stir manually for 5-8 minutes.

[0033] The ratio of polyurethane prepolymer to crosslinking agent and chain extender is 2.0-2.5:1;

[0034] S3. Place the mixture prepared in step S2 into a vacuum drying oven and evacuate it at room temperature for 7-10 minutes. Then quickly pour it into a polytetrafluoroethylene mold and evacuate it at room temperature for 10-20 minutes in the vacuum drying oven. After taking it out, place it in an oven for curing. The curing temperature is 80-85℃ and the curing time is 10-12 hours to obtain asphalt-modified polyurethane damping composite material.

[0035] In this embodiment, asphaltene extraction is also included, the asphaltene extraction comprising:

[0036] S101. Extracting asphalt from the raw material through an extraction experiment: Weigh an appropriate amount of sample into a ground glass distillation flask, add a certain amount of n-heptane to the sample, boil it with a reflux condenser, then remove the distillation flask, stopper it, and let it stand at room temperature for 2-3 hours.

[0037] The mass-to-volume (g / mL) ratio of the sample to n-heptane was 80-85:100.

[0038] S102. Place the filter paper in the glass funnel and pour the solution into the filter paper without stirring. Then rinse the inner wall of the distillation flask with hot n-heptane. Filter all the washing liquid through the filter paper and set the distillation flask aside for later use.

[0039] S103. Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux and extract with a certain amount of n-heptane. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time is 4-6 hours.

[0040] S104. Replace the original distillation flask, add toluene, and continue refluxing until all the bitumen is removed from the paper.

[0041] S105. Distill toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until all the toluene is evaporated to obtain asphalt.

[0042] The following is a description using specific embodiments.

[0043] Example 1

[0044] Step 1: Extract the asphalt from the raw material through an extraction experiment. Weigh 80g of the sample into a ground glass distillation flask and add 300mL of n-heptane to the sample. Boil the sample using a reflux condenser. Remove the distillation flask, stopper it, and let it stand at room temperature for 2 hours.

[0045] Step 2: Place filter paper into a glass funnel and pour the solution through the filter paper without stirring. Then rinse the inside of the distillation flask with hot n-heptane, filtering all the washings through the filter paper. Set the flask aside for later use.

[0046] Step 3: Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux with 250 mL of n-heptane for extraction. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time: 4 hours.

[0047] Step 4: Replace the original flask with the one used before, add 300 mL of toluene, and continue reflux until all the bitumen is removed from the paper.

[0048] Step 5: Distill the toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until the toluene is completely evaporated to obtain asphaltene.

[0049] Step 6: Grind 1 part of the extracted asphalt into powder and add 29 parts of crosslinking agent and chain extender components into a beaker, and stir at 100 r / min for 10 min.

[0050] Step 7: Add 71 parts of polyurethane prepolymer to the beaker of the mixture and stir manually for 5 minutes;

[0051] Step 8: Place the stirred mixture into a vacuum drying oven and vacuum it at room temperature for 8 minutes. Then quickly pour it into a polytetrafluoroethylene mold and vacuum it at room temperature for 15 minutes in the vacuum drying oven. After taking it out, place it in an oven at 80°C for 12 hours to cure it and obtain the asphalt-modified polyurethane damping composite material.

[0052] Example 2

[0053] Step 1: Extract the asphalt from the raw material through an extraction experiment. Weigh 80g of the sample into a ground glass distillation flask and add 300mL of n-heptane to the sample. Boil the sample using a reflux condenser. Remove the distillation flask, stopper it, and let it stand at room temperature for 2 hours.

[0054] Step 2: Place the filter paper into the glass funnel, and without stirring, pour the solution into the filter paper for filtration. Then rinse the inner wall of the distillation flask with hot n-heptane. Filter all the washing liquid through the filter paper and set the flask aside for later use.

[0055] Step 3: Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux with 250 mL of n-heptane for extraction. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time: 4 hours.

[0056] Step 4: Replace the original flask with the one used before, add 300 mL of toluene, and continue reflux until all the bitumen is removed from the paper.

[0057] Step 5: Distill the toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until the toluene is completely evaporated to obtain asphaltene.

[0058] Step 6: Grind 2 parts of the extracted asphalt into powder and add 29 parts of crosslinking agent and chain extender components into a beaker, and stir at 100 r / min for 10 min.

[0059] Step 7: Add 71 parts of polyurethane prepolymer to the beaker of the mixture and stir manually for 5 minutes;

[0060] Step 8: Place the stirred mixture into a vacuum drying oven and vacuum it at room temperature for 8 minutes. Then quickly pour it into a polytetrafluoroethylene mold and vacuum it at room temperature for 15 minutes in the vacuum drying oven. After taking it out, place it in an oven at 80°C for 12 hours to cure it and obtain the asphalt-modified polyurethane damping composite material.

[0061] Example 3

[0062] Step 1: Extract the asphalt from the raw material through an extraction experiment. Weigh 80g of the sample into a ground glass distillation flask and add 300mL of n-heptane to the sample. Boil the sample using a reflux condenser. Remove the distillation flask, stopper it, and let it stand at room temperature for 2 hours.

[0063] Step 2: Place filter paper into a glass funnel and pour the solution through the filter paper without stirring. Then rinse the inside of the distillation flask with hot n-heptane, filtering all the washings through the filter paper. Set the flask aside for later use.

[0064] Step 3: Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux with 250 mL of n-heptane for extraction. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time: 4 hours.

[0065] Step 4: Replace the original flask with the one used before, add 300 mL of toluene, and continue reflux until all the bitumen is removed from the paper.

[0066] Step 5: Distill the toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until the toluene is completely evaporated to obtain asphaltene.

[0067] Step 6: Grind 3 parts of the extracted asphalt into powder and add 29 parts of crosslinking agent and chain extender components into a beaker, and stir at 100 r / min for 10 min.

[0068] Step 7: Add 71 parts of polyurethane prepolymer to the beaker of the mixture and stir manually for 5 minutes;

[0069] Step 8: Place the stirred mixture into a vacuum drying oven and vacuum it at room temperature for 8 minutes. Then quickly pour it into a polytetrafluoroethylene mold and vacuum it at room temperature for 15 minutes. After taking it out, place it in an oven at 80°C for 12 hours to cure it and obtain the asphalt-modified polyurethane damping composite material.

[0070] Example 4

[0071] Step 1: Extract the asphalt from the raw material through an extraction experiment. Weigh 80g of the sample into a ground glass distillation flask and add 300mL of n-heptane to the sample. Boil the sample using a reflux condenser. Remove the distillation flask, stopper it, and let it stand at room temperature for 2 hours.

[0072] Step 2: Place filter paper into a glass funnel and pour the solution into the filter paper without stirring. Then rinse the inner wall of the distillation flask with hot n-heptane. Filter all the washing liquid through the filter paper and set the flask aside for later use.

[0073] Step 3: Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux with 250 mL of n-heptane for extraction. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time: 4 hours.

[0074] Step 4: Replace the original flask with the one used before, add 300 mL of toluene, and continue reflux until all the bitumen is removed from the paper.

[0075] Step 5: Distill the toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until the toluene is completely evaporated to obtain asphaltene.

[0076] Step 6: Grind 4 parts of the extracted asphalt into powder and add 29 parts of crosslinking agent and chain extender components into a beaker, and stir at 100 r / min for 10 min.

[0077] Step 7: Add 71 parts of polyurethane prepolymer to the beaker of the mixture and stir manually for 5 minutes;

[0078] Step 8: Place the stirred mixture into a vacuum drying oven and vacuum it at room temperature for 8 minutes. Then quickly pour it into a polytetrafluoroethylene mold and vacuum it at room temperature for 15 minutes. After taking it out, place it in an oven at 80°C for 12 hours to cure it and obtain the asphalt-modified polyurethane damping composite material.

[0079] Example 5

[0080] Step 1: Extract the asphalt from the raw material through an extraction experiment. Weigh 80g of the sample into a ground glass distillation flask and add 300mL of n-heptane to the sample. Boil the sample using a reflux condenser. Remove the distillation flask, stopper it, and let it stand at room temperature for 2 hours.

[0081] Step 2: Place filter paper into a glass funnel and pour the solution into the filter paper without stirring. Then rinse the inner wall of the distillation flask with hot n-heptane. Filter all the washing liquid through the filter paper and set the flask aside for later use.

[0082] Step 3: Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux with 250 mL of n-heptane for extraction. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time: 4 hours.

[0083] Step 4: Replace the original flask with the one used before, add 300 mL of toluene, and continue reflux until all the bitumen is removed from the paper.

[0084] Step 5: Distill the toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until the toluene is completely evaporated to obtain asphaltene.

[0085] Step 6: Grind 5 parts of the extracted asphalt into powder and add 29 parts of crosslinking agent and chain extender components into a beaker, and stir at 100 r / min for 10 min.

[0086] Step 7: Add 71 parts of polyurethane prepolymer to the beaker of the mixture and stir manually for 5 minutes;

[0087] Step 8: Place the stirred mixture into a vacuum drying oven and vacuum it at room temperature for 8 minutes. Then quickly pour it into a polytetrafluoroethylene mold and vacuum it at room temperature for 15 minutes in the vacuum drying oven. After taking it out, place it in an oven at 80°C for 12 hours to cure it and obtain the asphalt-modified polyurethane damping composite material.

[0088] The performance of the samples from the above embodiments was tested, and the test results are shown in the table below.

[0089] Tensile strength / MPa 2.7 2.8 2.9 2.9 2.6 Elongation at break / % 321.3 351.2 370.1 366.9 353.5 Loss factor 0.82 0.83 0.88 0.89 0.86

[0090] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0091] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A bituminous modified polyurethane damping composite material, characterized in that: The product comprises 65-75 parts of polyurethane prepolymer, 25-35 parts of crosslinking agent and chain extender, 1-5 parts of asphaltene, and 0.1-0.5 parts of solvent; the polyurethane prepolymer is synthesized from aromatic isocyanate and polyether polyol or polyester polyol; the crosslinking agent is a small molecule with multifunctionality containing alcohol or amine; and the chain extender is a small molecule compound of diamine. The method for preparing the asphalt-modified polyurethane damping composite material is as follows: S1. Grind the extracted asphalt into powder and add it to a beaker along with the crosslinking agent and chain extender components. Stir at 100-150 r / min for 10-20 min. S2. Add the polyurethane prepolymer to the beaker containing the mixture from step S1 and stir manually for 5-8 minutes. S3. Place the mixture prepared in step S2 into a vacuum drying oven and vacuum it at room temperature for 7-10 minutes. Then quickly pour it into a polytetrafluoroethylene mold and vacuum it at room temperature for 10-20 minutes. After removing it, place it in an oven to cure it and obtain the asphalt-modified polyurethane damping composite material.

2. The asphalt-modified polyurethane damping composite material according to claim 1, characterized in that: The asphaltenes are extracts from crude oil and asphalt.

3. The asphalt-modified polyurethane damping composite material according to claim 1, characterized in that: The solvent is analytical grade toluene.

4. The preparation method of the asphalt-modified polyurethane damping composite material according to claim 1, characterized in that: It also includes the extraction of asphaltenes, the extraction of asphaltenes including... S101. Extracting asphalt from the raw material through an extraction experiment: Weigh an appropriate amount of sample into a ground glass distillation flask, add a certain amount of n-heptane to the sample, boil it with a reflux condenser, remove the distillation flask, stopper it, and let it stand at room temperature for 2-3 hours. S102. Place the filter paper in the glass funnel and pour the solution into the filter paper without stirring. Then rinse the inner wall of the distillation flask with hot n-heptane. Filter all the washing liquid through the filter paper and set the distillation flask aside for later use. S103. Remove the filter paper from the funnel and place it in the extractor. Use another distillation flask to reflux and extract with a certain amount of n-heptane. Control the rate at which n-heptane drips from the end of the condenser to be 2-4 drops per second. Extraction time is 4-6 hours. S104. Replace the original distillation flask, add toluene, and continue refluxing until all the bitumen is removed from the paper. S105. Distill toluene from the distillation flask in a furnace inside a fume hood. After evaporation to a certain extent, transfer the solution in the distillation flask to a beaker and continue evaporation until all the toluene is evaporated to obtain asphalt.

5. The method for preparing the asphalt-modified polyurethane damping composite material according to claim 4, characterized in that: The mass-to-volume ratio of the sample to n-heptane was 80-85: 100, where the unit of mass is grams and the unit of volume is milliliters.

6. The method for preparing the asphalt-modified polyurethane damping composite material according to claim 1, characterized in that: The ratio of the polyurethane prepolymer to the crosslinking agent and chain extender is 2.0-2.5:

1.

7. The method for preparing the asphalt-modified polyurethane damping composite material according to claim 1, characterized in that: In step S3, the curing temperature is 80-85℃ and the curing time is 10-12h.

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