CN113999516A - Vibration damping material and preparation method and application thereof - Google Patents
Vibration damping material and preparation method and application thereof Download PDFInfo
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- CN113999516A CN113999516A CN202111327851.3A CN202111327851A CN113999516A CN 113999516 A CN113999516 A CN 113999516A CN 202111327851 A CN202111327851 A CN 202111327851A CN 113999516 A CN113999516 A CN 113999516A
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The application belongs to the technical field of vibration damping materials, and particularly relates to a vibration damping material and a preparation method and application thereof. The damping material of the present application comprises: polyurethane rubber, maleic anhydride grafted polyolefin elastomer, modified polyurethane-epoxy acrylic resin, bisphenol S epoxy resin, polyimide, carbon black, titanium dioxide, glass fiber, stearic acid, a defoaming agent, an antioxidant, a vulcanizing agent and an accelerator; a method of preparing a vibration damping material comprising: mixing polyurethane rubber, a maleic anhydride grafted polyolefin elastomer, modified polyurethane-epoxy acrylic resin, bisphenol S epoxy resin, polyimide, carbon black, titanium dioxide, glass fiber, stearic acid, a defoaming agent, an antioxidant, a vulcanizing agent and an accelerant for a vulcanization reaction to obtain the vibration damping material. The damping material can overcome the technical defects of poor abrasion resistance, poor aging, insufficient impact resistance and poor flex fatigue resistance of the motor damping pad in the prior art in continuous use.
Description
Technical Field
The application belongs to the technical field of vibration damping materials, and particularly relates to a vibration damping material and a preparation method and application thereof.
Background
The motor is a common device of mechanical equipment, mechanical vibration can bring many adverse effects on some occasions, such as increase of loss, noise generation and the like, good wear resistance and aging resistance are required due to the continuity of operation and use of the motor, and the motor generates noise and generates continuous vibration during operation. The vibration damping pad can reduce the generation of noise, minimize vibration and reduce the influence on the surrounding environment and personnel. The conventional motor damping pad has the problems of poor abrasion resistance, poor aging, insufficient impact resistance, poor flex fatigue resistance and the like in the use process.
Therefore, in order to reduce such adverse effects, it is possible to isolate the shock and absorb the shock by a vibration-isolating pad or the like. The damping pad is widely applied to various industries, such as automobiles, bridges, mechanical equipment, motors, buildings, clothes and the like. In the use process of the existing motor damping pad, due to the continuity of equipment, the wear resistance and the aging resistance are poor, and the service life of the existing motor damping pad is influenced. Therefore, it is necessary to develop a highly wear-resistant and aging-resistant damping pad and prolong the service life of the damping pad.
Disclosure of Invention
In view of this, the application provides a vibration damping material, a preparation method and an application thereof, which can be used for a manufacturing method of a motor vibration damping pad, and is a material with high wear resistance, aging resistance and convenient processing and forming.
The present application provides, in a first aspect, a vibration damping material comprising:
polyurethane rubber, maleic anhydride grafted polyolefin elastomer, modified polyurethane-epoxy acrylic resin, bisphenol S epoxy resin, polyimide, carbon black, titanium dioxide, glass fiber, stearic acid, a defoaming agent, an antioxidant, a vulcanizing agent and an accelerator;
the structural formula of the modified polyurethane-epoxy acrylic resin is as follows:
wherein, R is1Is composed of
The R is2Is composed of
In another embodiment, the damping material comprises, in parts by weight
In another embodiment, the stearic acid is selected from zinc stearate or/and stearic acid 1801; the defoaming agent is selected from defoaming agent BYK-088 or/and defoaming agent BYK 141; the antioxidant is selected from: one or more of antioxidant 1135, antioxidant 1076, and antioxidant BHT; the vulcanizing agent is selected from one or more of sulfur, a vulcanizing agent BP, a vulcanizing agent DCBPI and a vulcanizing agent DCP; the accelerator is selected from dibenzothiazyl disulfide zinc or/and dimethyl dithiocarbamate zinc.
In a second aspect, the present application provides a method for preparing a vibration damping material, comprising the steps of:
and 2, mixing the reactant, a vulcanizing agent and an accelerant for a vulcanization reaction to obtain the vibration damping material.
In another embodiment, in the step 1, the heating and banburying temperature is 80-100 ℃, and the heating and banburying time is 30-45 min.
In another embodiment, in the step 2, the temperature of the vulcanization reaction is 210 ℃ to 250 ℃; the time of the vulcanization reaction is 15-30 min.
In another embodiment, the preparation method of the modified polyurethane-epoxy acrylic resin comprises the following steps: according to the synthetic route of the modified polyurethane-epoxy acrylic resin, mixing polyurethane acrylic resin, styrene, epoxy acrylate resin and an initiator in a solvent, and carrying out heating reflux reaction to obtain the modified polyurethane-epoxy acrylic resin;
the structural formula of the modified polyurethane-epoxy acrylic resin is as follows:
wherein, R is1Is composed of
The R is2Is composed of
The synthetic route of the modified polyurethane-epoxy acrylic resin is as follows:
wherein, R is1Is composed of
The R is2Is composed of
In another embodiment, the molar ratio of the urethane acrylic resin, the styrene and the epoxy acrylate resin is (1-2): 0.2-0.5): 1-1.5.
The molar ratio of the polyurethane acrylic resin, the styrene and the epoxy acrylate resin is 1: 0.2: 1.
in another embodiment, the viscosity of the epoxy acrylate resin is 150 to 250 cps.
In another embodiment, the solvent is selected from one or more of ethyl acetate, ethyl acetate and butyl acetate.
In another embodiment, the initiator is selected from one or more of initiator BPO, initiator AIBN and initiator ABVN.
The third aspect of the application discloses the application of the damping material or the damping material prepared by the preparation method in a damping pad of a motor.
The modified polyurethane-epoxy acrylic resin is introduced into a polyurethane rubber system, so that the toughness and the impact strength of the polyurethane rubber system can be improved, and the maleic anhydride grafted polyolefin elastomer is introduced, so that the polarity in the system can be increased, the system can be better combined with other polar and non-polar materials, and the compatibility of the system can be effectively increased by the maleic anhydride grafted polyolefin elastomer.
Compared with the conventional mode of blending polyurethane and epoxy resin, the modified polyurethane-epoxy acrylic resin adopted by the method is an amphoteric molecule, so that the compatibility of polyurethane and epoxy resin in a system can be improved, and the mechanical strength is improved. In addition, because the bisphenol-S epoxy resin has good high elasticity, the polyurethane rubber is used as a main material of a damping material, the bisphenol-S epoxy resin is introduced into a polyurethane rubber system, and the bisphenol-S epoxy resin has a structure with strong electron-withdrawing group-sulfuryl group compared with the conventional epoxy resin
Increasing the damping coefficient of the damping material; the glass fiber has better bonding property and wettability with mixed glass fiber, and is beneficial to the compatibility of all components, so that all components are combined more tightly, and the glass fiber has proper static rigidity.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a structural formula of a modified polyurethane-epoxy acrylic resin provided in an embodiment of the present application;
fig. 2 is a synthetic route of the modified polyurethane-epoxy acrylic resin provided in the embodiment of the present application.
Detailed Description
The application provides a vibration damping material and a preparation method and application thereof, which are used for solving the technical defects of poor abrasion resistance, poor aging, insufficient impact strength and poor flex fatigue resistance of a motor vibration damping pad in the prior art in continuous use.
The technical solutions in the embodiments of the present application will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The raw materials and reagents used in the following examples are commercially available or self-made.
The synthetic route of the modified polyurethane-epoxy acrylic resin used in the following examples is shown in fig. 2, and the preparation method comprises the following steps:
polyurethane acrylic resin, styrene and epoxy acrylic resin are mixed according to a molar ratio of 1: 0.2: 1 to a reactor to obtain a mixture, and adding ethyl acetate, wherein the volume ratio of the ethyl acetate to the mixture is 1: 1, heating and refluxing, adding an initiator BPO, stirring and reacting to obtain modified polyurethane-epoxy acrylic resin, wherein the modified polyurethane-epoxy acrylic resin is a macromolecular chain amphoteric prepolymer; wherein the epoxy acrylic resin is low-viscosity epoxy acrylic resin with the viscosity of 200 cps.
The polyurethane rubber used in the following examples was purchased from Hebeiwen blue sealing material; maleic anhydride grafted polyolefin elastomers are purchased from dow chemistry; polyurethane acrylics are purchased from a brand new resin; epoxy acrylate resins were purchased from chang materials.
The maleic anhydride-grafted polyolefin elastomer of the following examples was POE-g-MAH.
Example 1
The embodiment of the application provides a damping material and a motor damping pad prepared by the damping material, and the damping pad specifically comprises:
the damping material comprises the following components: the rubber comprises the following components in parts by weight: 60 parts of maleic anhydride grafted polyolefin elastomer: 20 parts of modified polyurethane-epoxy acrylic resin: 15 parts of bisphenol S epoxy resin: 10 parts of polyimide: 10 parts of carbon black: 9 parts of titanium dioxide: 3 parts of glass fiber: 5 parts, zinc stearate: 5 parts, defoaming agent BYK 141: 1 part, antioxidant 1076: 2 parts of vulcanizing agent DCBPI: 4 parts and zinc dibenzothiazyl disulfide: 2.5 parts.
The preparation method of the motor damping pad comprises the following steps: the raw materials (60 parts of polyurethane rubber, 20 parts of maleic anhydride grafted polyolefin elastomer, 15 parts of modified polyurethane-epoxy acrylic resin, 10 parts of bisphenol S epoxy resin, 10 parts of polyimide, 9 parts of carbon black, 3 parts of titanium dioxide, 5 parts of glass fiber, 5 parts of zinc stearate, 1 part of defoaming agent BYK141 and 2 parts of antioxidant 1076) are added into an internal mixing device and mixed uniformly. Heating to 95 deg.C, kneading for 40min, and cooling to obtain reactant. And putting the reactant, 4 parts by weight of vulcanizing agent DCBPI and 2.5 parts by weight of dibenzothiazyl disulfide zinc into a vulcanizing machine, and vulcanizing at 230 ℃ for 20 minutes to obtain the motor damping pad with good wear resistance and excellent aging resistance.
Example 2
The embodiment of the application provides a damping material and a motor damping pad prepared by the damping material, and the damping pad specifically comprises:
the damping material comprises the following components: the rubber comprises the following components in parts by weight: 65 parts of maleic anhydride grafted polyolefin elastomer: 18 parts of modified polyurethane-epoxy acrylic resin: 20 parts of bisphenol S epoxy resin: 12 parts of polyimide: 12 parts of carbon black: 12 parts of titanium dioxide: 3 parts of glass fiber: 6 parts of zinc stearate: 4 parts, defoaming agent BYK 141: 1.5 parts, antioxidant 1076: 2.5 parts of vulcanizing agent DCBPI: 4.5 parts and zinc dibenzothiazyl disulfide: and 3 parts.
The preparation method of the motor damping pad comprises the following steps: the raw materials (65 parts of polyurethane rubber, 18 parts of maleic anhydride grafted polyolefin elastomer, 20 parts of modified polyurethane-epoxy acrylic resin, 12 parts of bisphenol S epoxy resin, 12 parts of polyimide, 12 parts of carbon black, 3 parts of titanium dioxide, 6 parts of glass fiber, 4 parts of zinc stearate, 1.5 parts of defoaming agent BYK141 and 2.5 parts of antioxidant 1076) are added into a banburying device and mixed uniformly. Heating to 95 deg.C, kneading for 40min, and cooling to obtain reactant. And putting the reactant, 4.5 parts by weight of vulcanizing agent DCBPI and 3 parts by weight of dibenzothiazyl disulfide zinc into a vulcanizing machine, and vulcanizing at 230 ℃ for 20 minutes to obtain the motor damping pad with good wear resistance and excellent aging resistance.
Example 3
The embodiment of the application provides a damping material and a motor damping pad prepared by the damping material, and the damping pad specifically comprises:
the damping material comprises the following components: the rubber comprises the following components in parts by weight: 70 parts of maleic anhydride grafted polyolefin elastomer: 16 parts of modified polyurethane-epoxy acrylic resin: 22 parts of bisphenol S epoxy resin: 14 parts of polyimide: 7 parts of carbon black: 15 parts of titanium dioxide: 4.5 parts of glass fiber: 6 parts of zinc stearate: 4.5 parts, defoaming agent BYK 141: 1.2 parts, antioxidant 1076: 2.5 parts of vulcanizing agent DCBPI: 5 parts of dibenzothiazole disulfide zinc: and 2 parts.
The preparation method of the motor damping pad comprises the following steps: the raw materials (70 parts of polyurethane rubber, 16 parts of maleic anhydride grafted polyolefin elastomer, 22 parts of modified polyurethane-epoxy acrylic resin, 14 parts of bisphenol S epoxy resin, 7 parts of polyimide, 15 parts of carbon black, 4.5 parts of titanium dioxide, 6 parts of glass fiber, 4.5 parts of zinc stearate, 1.2 parts of defoaming agent BYK141 and 2.5 parts of antioxidant 1076) are added into an internal mixing device and mixed uniformly. Heating to 95 deg.C, kneading for 40min, and cooling to obtain reactant. And putting the reactant, 5 parts by weight of vulcanizing agent DCBPI and 2 parts by weight of dibenzothiazyl disulfide zinc into a vulcanizing machine, and vulcanizing at 230 ℃ for 20 minutes to obtain the motor damping pad with good wear resistance and excellent aging resistance.
Comparative example 1
The comparative example of this application provides contrast damping material and contrast motor damping pad, specifically includes:
this comparative example did not add a polyurethane elastomer rubber.
The composition of the control damping material included: maleic anhydride grafted polyolefin elastomer, calculated in parts by weight: 30 parts of modified polyurethane-epoxy acrylic resin: 30 parts of bisphenol S epoxy resin: 15 parts, 12 parts of polyimide, and carbon black: 8 parts of titanium dioxide: 4 parts of glass fiber: 8 parts of zinc stearate: 5 parts, defoaming agent BYK 141: 1 part, antioxidant 1076: and 2 parts.
The preparation method of the control motor damping pad comprises the following steps: the raw materials (30 parts of maleic anhydride grafted polyolefin elastomer, 30 parts of modified polyurethane-epoxy acrylic resin, 15 parts of bisphenol S epoxy resin, 12 parts of polyimide, 8 parts of carbon black, 4 parts of titanium dioxide, 8 parts of glass fiber, 5 parts of zinc stearate, 1 part of defoaming agent BYK141 and 2 parts of antioxidant 1076) are added into an internal mixing device and mixed uniformly. Heating to 95 deg.C, kneading for 40min, and cooling to obtain reactant. The reactant, 4 parts by weight of a vulcanizing agent DCBPI and 2.5 parts by weight of dibenzothiazyl disulfide zinc were put into a vulcanizer and vulcanized at 230 ℃ for 20 minutes to obtain a control motor vibration damping pad.
Comparative example 2
The comparative example of this application provides contrast damping material and contrast motor damping pad, specifically includes:
this comparative example did not add maleic anhydride grafted polyolefin elastomer.
The composition of the control damping material included: polyurethane elastomer rubber: 65 parts of modified polyurethane-epoxy acrylic resin: 25 parts of bisphenol S epoxy resin: 10 parts, 8 parts of polyimide, and carbon black: 9 parts of titanium dioxide: 4 parts of glass fiber: 8 parts of stearic acid: 5 parts, defoaming agent BYK 141: 1 part, antioxidant 1076: and 2 parts.
The preparation method of the control motor damping pad comprises the following steps: the raw materials (65 parts of polyurethane elastomer rubber, 25 parts of modified polyurethane-epoxy acrylic resin, 10 parts of bisphenol S epoxy resin, 8 parts of polyimide, 9 parts of carbon black, 4 parts of titanium dioxide, 8 parts of glass fiber, 5 parts of stearic acid, 1 part of defoaming agent BYK141 and 2 parts of antioxidant 1076) are added into an internal mixing device and mixed uniformly. Heating to 95 deg.C, kneading for 40min, and cooling to obtain reactant. The reactant, 4.5 parts by weight of a vulcanizing agent DCBPI and 3 parts by weight of dibenzothiazyl disulfide zinc were put into a vulcanizer and vulcanized at 230 ℃ for 20 minutes to obtain a control motor vibration damping pad.
Comparative example 3
The comparative example of this application provides contrast damping material and contrast motor damping pad, specifically includes:
the comparative example does not add the modified polyurethane-epoxy acrylic resin.
The composition of the control damping material included: polyurethane elastomer rubber: 70 parts of maleic anhydride grafted polyolefin elastomer, 15 parts of bisphenol S epoxy resin: 15 parts, 10 parts of polyimide, and carbon black: 9 parts of titanium dioxide: 4 parts of glass fiber: 8 parts, hard fatty acid: 5 parts, 1 part of defoaming agent BYK141 and 2 parts of antioxidant 1076.
The preparation method of the control motor damping pad comprises the following steps: the raw materials (70 parts of polyurethane elastomer rubber, 15 parts of maleic anhydride grafted polyolefin elastomer, 15 parts of bisphenol S epoxy resin, 10 parts of polyimide, 9 parts of carbon black, 4 parts of titanium dioxide, 8 parts of glass fiber, 5 parts of hard fatty acid, 1 part of defoaming agent BYK141 and 2 parts of antioxidant 1076) are added into an internal mixing device and mixed uniformly. Heating to 95 deg.C, kneading for 40min, and cooling to obtain reactant. The reactant, 4.5 parts by weight of vulcanizing agent DCBPI and 2 parts by weight of dibenzothiazyl disulfide zinc were put into a vulcanizer and vulcanized at 230 ℃ for 20 minutes to obtain a control motor vibration damping pad.
The tensile strength, elongation at break, shore a hardness and damping coefficient of the motor vibration damping pads of examples 1 to 3 and comparative examples 1 to 3 were measured, and the results are shown in table 1.
TABLE 1
| Tensile strength/MPa | Elongation at break/% | Shore A hardness | Damping coefficient | |
| Example 1 | 78 | 467 | 75 | 1.43 |
| Example 2 | 80 | 463 | 76 | 1.41 |
| Example 3 | 76 | 474 | 78 | 1.44 |
| Comparative example 1 | 65 | 402 | 78 | 1.23 |
| Comparative example 2 | 67 | 385 | 76 | 1.32 |
| Comparative example 3 | 62 | 374 | 80 | 1.28 |
According to the data, the polyurethane rubber, the maleic anhydride grafted polyolefin elastomer, the modified polyurethane-epoxy acrylic resin and the bisphenol S epoxy resin are added into the vibration-damping main material, and the modified polyurethane-epoxy acrylic resin is introduced under the synergistic effect of the four raw materials, so that the conventional single intermixing mode is changed, polar and non-polar materials in the components can be better combined, the compatibility in a system is increased, and the vibration-damping main material has better physical and mechanical properties; in addition, the damping material prepared by adding the modified polyurethane-epoxy acrylic resin has the characteristics of good abrasion resistance, aging resistance and good tensile strength.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. A vibration damping material, comprising:
polyurethane rubber, maleic anhydride grafted polyolefin elastomer, modified polyurethane-epoxy acrylic resin, bisphenol S epoxy resin, polyimide, carbon black, titanium dioxide, glass fiber, stearic acid, a defoaming agent, an antioxidant, a vulcanizing agent and an accelerator;
the structural formula of the modified polyurethane-epoxy acrylic resin is as follows:
wherein, R is1Is composed of
The R is2Is composed of
2. Damping material according to claim 1, characterized in that it comprises, in parts by weight
3. Damping material according to claim 1 or 2, characterized in that the stearic acid is selected from zinc stearate or/and stearic acid 1801; the defoaming agent is selected from defoaming agent BYK-088 or/and defoaming agent BYK 141; the antioxidant is selected from: one or more of antioxidant 1135, antioxidant 1076, and antioxidant BHT; the vulcanizing agent is selected from one or more of vulcanizing agent BP, vulcanizing agent DCBPI and vulcanizing agent DCP; the accelerator is selected from dibenzothiazyl disulfide zinc or/and dimethyl dithiocarbamate zinc.
4. The preparation method of the damping material is characterized by comprising the following steps of:
step 1, mixing polyurethane rubber, a maleic anhydride grafted polyolefin elastomer, modified polyurethane-epoxy acrylic resin, bisphenol S epoxy resin, polyimide, carbon black, titanium dioxide, glass fiber, stearic acid, a defoaming agent and an antioxidant, and heating and banburying to obtain a reactant;
the structural formula of the modified polyurethane-epoxy acrylic resin is as follows:
wherein, R is1Is composed of
The R is2Is composed of
And 2, mixing the reactant, a vulcanizing agent and an accelerant for a vulcanization reaction to obtain the vibration damping material.
5. The preparation method according to claim 4, wherein in the step 1, the temperature for heating and banburying is 80-100 ℃, and the time for heating and banburying is 30-45 min.
6. The preparation method according to claim 4, wherein in the step 2, the temperature of the vulcanization reaction is 210 ℃ to 250 ℃; the time of the vulcanization reaction is 15-30 min.
7. The preparation method of claim 4, wherein the preparation method of the modified polyurethane-epoxy acrylic resin comprises the following steps: according to the synthetic route of the modified polyurethane-epoxy acrylic resin, mixing the polyurethane acrylic resin, styrene, epoxy acrylate resin and an initiator in a solvent, and carrying out heating reflux reaction to obtain the modified polyurethane-epoxy acrylic resin;
the structural formula of the modified polyurethane-epoxy acrylic resin is as follows:
wherein, R is1Is composed of
The R is2Is composed of
The synthetic route of the modified polyurethane-epoxy acrylic resin is as follows:
wherein, R is1Is composed of
The R is2Is composed of
8. The method according to claim 7, wherein the molar ratio of the urethane acrylic resin, the styrene resin and the epoxy acrylate resin is (1-2): (0.2-0.5): (1-1.5).
9. The method of claim 7, wherein the epoxy acrylate resin has a viscosity of 150 to 250 cps.
10. Use of the vibration damping material according to any one of claims 1 to 3 or the vibration damping material prepared by the preparation method according to any one of claims 4 to 9 in a vibration damping pad for a motor.
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