CN117227203A - Preparation method of high-tensile high-bearing shock insulation support - Google Patents
Preparation method of high-tensile high-bearing shock insulation support Download PDFInfo
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- CN117227203A CN117227203A CN202311443475.3A CN202311443475A CN117227203A CN 117227203 A CN117227203 A CN 117227203A CN 202311443475 A CN202311443475 A CN 202311443475A CN 117227203 A CN117227203 A CN 117227203A
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- 238000009413 insulation Methods 0.000 title claims abstract description 38
- 230000035939 shock Effects 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 229920003225 polyurethane elastomer Polymers 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 229920002635 polyurethane Polymers 0.000 claims abstract description 32
- 239000004814 polyurethane Substances 0.000 claims abstract description 32
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000007796 conventional method Methods 0.000 claims abstract description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 50
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 26
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 25
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 17
- 229920000570 polyether Polymers 0.000 claims description 17
- AOFIWCXMXPVSAZ-UHFFFAOYSA-N 4-methyl-2,6-bis(methylsulfanyl)benzene-1,3-diamine Chemical compound CSC1=CC(C)=C(N)C(SC)=C1N AOFIWCXMXPVSAZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000002518 antifoaming agent Substances 0.000 claims description 13
- 239000003054 catalyst Substances 0.000 claims description 13
- 229920001451 polypropylene glycol Polymers 0.000 claims description 13
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 12
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 9
- 239000004014 plasticizer Substances 0.000 claims description 9
- DKWHHTWSTXZKDW-UHFFFAOYSA-N 1-[2-[2-[2-(2-butoxyethoxy)ethoxymethoxy]ethoxy]ethoxy]butane Chemical compound CCCCOCCOCCOCOCCOCCOCCCC DKWHHTWSTXZKDW-UHFFFAOYSA-N 0.000 claims description 7
- CFXCGWWYIDZIMU-UHFFFAOYSA-N Octyl-3,5-di-tert-butyl-4-hydroxy-hydrocinnamate Chemical compound CCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 CFXCGWWYIDZIMU-UHFFFAOYSA-N 0.000 claims description 6
- 239000013530 defoamer Substances 0.000 claims description 6
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 6
- ZUFUSIMENKJSMG-UHFFFAOYSA-N 1-methyl-3,5-bis(methylsulfanyl)benzene Chemical group CSC1=CC(C)=CC(SC)=C1 ZUFUSIMENKJSMG-UHFFFAOYSA-N 0.000 claims description 5
- CHJMFFKHPHCQIJ-UHFFFAOYSA-L zinc;octanoate Chemical compound [Zn+2].CCCCCCCC([O-])=O.CCCCCCCC([O-])=O CHJMFFKHPHCQIJ-UHFFFAOYSA-L 0.000 claims description 4
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 3
- 239000011496 polyurethane foam Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 abstract 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 210000000988 bone and bone Anatomy 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 239000004970 Chain extender Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
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- 230000001988 toxicity Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Abstract
The invention discloses a preparation method of a high-tensile high-bearing shock insulation support, which comprises the steps of mixing a polyurethane elastomer A component and a polyurethane elastomer B component, pouring the mixture into a multi-cavity mold, curing at room temperature to obtain a polyurethane elastic gasket, uniformly arranging a plurality of grooves on one surfaces of a support sealing plate and a multi-layer skeleton plate, adapting the diameters of the grooves to the polyurethane elastic gasket, carrying out surface treatment on the skeleton plate, an upper sealing plate and a lower sealing plate, coating cold adhesive, superposing the sealing plate and the skeleton plate in a sealable vacuum mold according to a conventional method, placing the polyurethane elastic gasket in the grooves of the skeleton plate and the lower sealing plate, pouring the polyurethane elastomer A component and the polyurethane elastomer B component into the vacuum mold, continuously vacuumizing, curing at room temperature, and demolding to obtain the high-tensile high-bearing shock insulation support; the shock insulation support is novel in structure, simple in forming process, and high in tensile strength, high in bearing capacity and the like.
Description
Technical Field
The invention relates to the technical field of building vibration reduction and shock resistance, in particular to a high-tensile high-bearing shock insulation support for building vibration reduction and shock resistance.
Background
The shock insulation support is a shock absorption and energy consumption device formed by integrally vulcanizing a plurality of layers of internal elastic rubber materials and a plurality of layers of internal steel plates in a superposition manner. The vibration isolation support absorbs and dissipates vibration energy through deformation generated by the high elastic property of the rubber. At present, the vertical tension can occur in the use process of the shock insulation support, and the tensile yield strength of the prepared shock insulation support is lower by about 1.5MPa and the ultimate tensile stress is about 4MPa because the tensile strength of the natural rubber is 15-25 MPa. In order to solve the vertical tensile problem of the shock insulation support, a tensile device is often added around the support, but the tensile device has the advantages of complex process, higher cost and low reliability.
Polyurethane has a modulus between rubber and plastic, yet has a high elasticity at hardness higher than 75A, and is widely used. The invention forms a prepolymer by two polyether polyols and diphenylmethane diisocyanate, and the prepolymer is mixed with dimethyl thiotoluene diamine, a plasticizer, a defoaming agent, a catalyst and the like according to a certain proportion, poured into a mold and cured and molded at room temperature.
Compared with the traditional shock-insulation rubber support, the shock-insulation support prepared from the polyurethane has the advantages of simple production process, environmental protection and energy conservation, and the prepared support has higher tensile yield strength and ultimate tensile strength, and simultaneously ensures the high elasticity and large deformation characteristics of the shock-insulation support in a wide temperature range.
However, polyurethane shock insulation supports with good performance are not developed in the prior art.
Disclosure of Invention
The invention provides a room-temperature curing high-tensile high-bearing shock insulation support, which has the characteristics of simple and environment-friendly production process, room-temperature curing, cost reduction, energy conservation and the like, and the product has excellent low-temperature resistance, high bearing, high tensile strength and high elasticity.
The technical scheme of the invention is as follows:
a preparation method of a high-tensile high-bearing shock insulation support comprises the following specific steps:
(1) The polyurethane elastomer A component and the polyurethane elastomer B component are mixed according to the mass ratio of 80:20-60:40, and then poured into a multi-cavity mold, and cured at room temperature to obtain a plurality of polyurethane elastic gaskets;
(2) Uniformly arranging a plurality of grooves on one surface of a support sealing plate and one surface of a multi-layer skeleton plate, wherein the diameters of the grooves are matched with those of the polyurethane elastic gasket prepared in the step (1);
(3) After the surfaces of the skeleton plate, the upper sealing plate and the lower sealing plate are treated, a cold adhesive is coated;
(4) The sealing plate and the framework plate are overlapped and placed in a sealable vacuum die according to a conventional method, and the polyurethane elastic gasket prepared in the step (1) is placed in a groove between the framework plate and the sealing plate;
(5) And (3) mixing the polyurethane elastomer A component and the polyurethane elastomer B component according to the mass ratio of 80:20-60:40, pouring into the vacuum die in the step (4), continuously vacuumizing, solidifying at room temperature, and demolding to obtain the high-tensile high-bearing shock insulation support.
The preparation method of the polyurethane elastomer A component in the step (1) comprises the following steps: reacting 20-50 parts by mass of polytetrahydrofuran glycol, 5-15 parts by mass of polypropylene oxide ether glycol and 15-30 parts by mass of diphenylmethane diisocyanate at 70-80 ℃ for 1-8 hours to obtain the modified polyurethane foam; the number average molecular weight of the polytetrahydrofuran glycol is 1000-3000, and the number average molecular weight of the polypropylene oxide ether glycol is 1000-3000.
The preparation method of the polyurethane elastomer B component in the step (1) comprises the following steps: uniformly mixing 10-30 parts by mass of dimethyl thiotoluene diamine, 3-10 parts by mass of polyether plasticizer TP-90B, 2-5 parts by mass of defoamer, 0.1-1 part by mass of catalyst and 1-4 parts by mass of antioxidant 1135 at room temperature; the defoaming agent is polyether modified silicon defoaming agent; the catalyst comprises one of zinc, tin and amine, specifically one of zinc octoate, dibutyl tin dilaurate and triethylenediamine; the dimethyl thiotoluene diamine is 3, 5-dimethyl thiotoluene diamine.
And (3) the cold adhesive is THIXON403 or THIXON404, and the thickness of the adhesive is 25-40 mu m.
And (3) curing the step (1) and the step (5) for 2-7 days.
Compared with the prior art, the invention has the beneficial effects that:
(1) The polyurethane elastomer used in the invention takes tetrahydrofuran polyether as a soft chain segment, has regular and soft molecular chains, can endow the elastomer with good tensile property and low temperature resistance, and simultaneously, the polypropylene oxide ether glycol is added to destroy the regularity of the tetrahydrofuran polyether, inhibit low-temperature crystallization to further widen the wide temperature range of polyurethane and keep high elasticity, and simultaneously solve the problem of difficult pouring of the independently used tetrahydrofuran polyether due to viscosity in the forming process.
(2) Compared with Toluene Diisocyanate (TDI), the polyurethane elastomer used in the invention takes diphenylmethane diisocyanate (MDI) as a hard segment, has relatively low price, and meanwhile, the synthesized prepolymer reduces toxic components, thereby protecting the physical health of production operators and constructors and being beneficial to environmental protection.
(3) The polyurethane used in the invention takes the dimethyl thiotoluene diamine (DMTDA) as a chain extender, the dimethyl thiotoluene diamine is a low-viscosity liquid at room temperature, has excellent fluidity, provides convenience for pouring the polyurethane elastomer at room temperature, and has lower toxicity and better environmental protection compared with other common polyurethane chain extenders.
(4) The polyurethane used in the invention takes polyether type TP-90B as a plasticizer, has good compatibility with the soft segment part of the polyurethane elastomer, is not easy to migrate, and ensures the high elasticity of the polyurethane elastomer at high and low temperatures.
(5) The polyurethane elastomer used in the invention has the characteristics of high hardness, high tensile strength and high elasticity in a wide temperature range, and the shock insulation support prepared by the polyurethane elastomer has the characteristics of high bearing, high tensile strength and high elasticity in a wide temperature range.
(6) The polyurethane elastic gasket used in the invention can fix the skeleton plate, and ensure that the distance between the skeleton plate layers is uniform
(7) According to the invention, the polyurethane material is poured into the mold, and is cured and formed at room temperature, so that the cost is reduced, the energy is saved, and the process is environment-friendly.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The embodiment of the invention provides a high-tensile high-bearing shock insulation support and a preparation method thereof.
Example 1
A preparation method of a high-tensile high-bearing shock insulation support comprises the following specific steps:
(1) The preparation method of the polyurethane elastomer A component comprises the following steps: reacting 20 parts by mass of polytetrahydrofuran glycol, 5 parts by mass of polypropylene oxide ether glycol and 15 parts by mass of diphenylmethane diisocyanate at 70 ℃ for 1 hour; the number average molecular weight of polytetrahydrofuran glycol is 1000-3000, and the number average molecular weight of polypropylene oxide ether glycol is 1000-3000;
(2) The preparation method of the polyurethane elastomer B component comprises the following steps: uniformly mixing 10 parts by mass of dimethyl thiotoluene diamine, 30 parts by mass of polyether plasticizer TP-90B, 2 parts by mass of defoamer, 0.1 part by mass of catalyst and 1 part by mass of antioxidant 1135 at room temperature; the defoaming agent is polyether modified silicon defoaming agent; the catalyst is specifically zinc octoate, and the dimethyl thiotoluene diamine is 3, 5-dimethyl thiotoluene diamine;
(3) The polyurethane elastomer A component and the polyurethane elastomer B component are mixed according to the mass ratio of 80:20, and then poured into a multi-cavity mold, and cured for 2 days at room temperature to obtain a plurality of polyurethane elastic gaskets;
(4) Uniformly arranging a plurality of grooves on one surface of an upper sealing plate, a lower sealing plate and a multi-layer skeleton plate of the support, wherein the diameters of the grooves are matched with those of the polyurethane elastic gasket prepared in the step (1);
(5) After the surfaces of the bone plate, the upper sealing plate and the lower sealing plate are treated, a cold adhesive THIXON403 is coated, and the thickness of the adhesive is 25-40 mu m;
(6) The sealing plate and the framework plate are overlapped and placed in a sealable vacuum die according to a conventional method, and the polyurethane elastic gasket prepared in the step (1) is placed in grooves of the framework plate and the lower sealing plate, so that the sealing plate and the framework plate are spaced;
(7) And (3) mixing the polyurethane elastomer A component and the polyurethane elastomer B component according to the mass ratio of 80:20, pouring into the vacuum die in the step (4), continuously vacuumizing, solidifying for 2 days at room temperature, and demoulding to obtain the high-tensile high-bearing shock insulation support.
Example 2
A preparation method of a high-tensile high-bearing shock insulation support comprises the following specific steps:
(1) The preparation method of the polyurethane elastomer A component comprises the following steps: reacting 30 parts by mass of polytetrahydrofuran glycol, 8 parts by mass of polypropylene oxide ether glycol and 20 parts by mass of diphenylmethane diisocyanate at 75 ℃ for 3 hours; the number average molecular weight of polytetrahydrofuran glycol is 1000-3000, and the number average molecular weight of polypropylene oxide ether glycol is 1000-3000;
(2) The preparation method of the polyurethane elastomer B component comprises the following steps: 15 parts by mass of dimethyl thiotoluene diamine, 5 parts by mass of polyether plasticizer TP-90B, 3 parts by mass of defoamer, 0.4 part by mass of catalyst and 2 parts by mass of antioxidant 1135 are uniformly mixed at room temperature to prepare the modified polyurethane foam; the defoaming agent is polyether modified silicon defoaming agent; the catalyst is specifically zinc octoate, and the dimethyl thiotoluene diamine is 3, 5-dimethyl thiotoluene diamine;
(3) The polyurethane elastomer A component and the polyurethane elastomer B component are mixed according to the mass ratio of 70:30, and then poured into a multi-cavity mold, and cured for 3 days at room temperature to obtain a plurality of polyurethane elastic gaskets;
(4) Uniformly arranging a plurality of grooves on one surface of an upper sealing plate, a lower sealing plate and a multi-layer skeleton plate of the support, wherein the diameters of the grooves are matched with those of the polyurethane elastic gasket prepared in the step (1);
(5) After the surfaces of the bone plate, the upper sealing plate and the lower sealing plate are treated, a cold adhesive THIXON403 is coated, and the thickness of the adhesive is 25-40 mu m;
(6) The sealing plate and the framework plate are overlapped and placed in a sealable vacuum die according to a conventional method, and the polyurethane elastic gasket prepared in the step (1) is placed in grooves of the framework plate and the lower sealing plate, so that the sealing plate and the framework plate are spaced;
(7) And (3) mixing the polyurethane elastomer A component and the polyurethane elastomer B component according to the mass ratio of 70:30, pouring into the vacuum die in the step (4), continuously vacuumizing, solidifying for 3 days at room temperature, and demoulding to obtain the high-tensile high-bearing shock insulation support.
Example 3
A preparation method of a high-tensile high-bearing shock insulation support comprises the following specific steps:
(1) The preparation method of the polyurethane elastomer A component comprises the following steps: reacting 40 parts by mass of polytetrahydrofuran glycol, 10 parts by mass of polypropylene oxide ether glycol and 25 parts by mass of diphenylmethane diisocyanate at 80 ℃ for 3 hours; the number average molecular weight of polytetrahydrofuran glycol is 1000-3000, and the number average molecular weight of polypropylene oxide ether glycol is 1000-3000;
(2) The preparation method of the polyurethane elastomer B component comprises the following steps: uniformly mixing 20 parts by mass of dimethyl thiotoluene diamine, 8 parts by mass of polyether plasticizer TP-90B, 4 parts by mass of defoamer, 0.6 part by mass of catalyst and 3 parts by mass of antioxidant 1135 at room temperature; the defoaming agent is polyether modified silicon defoaming agent; the catalyst is specifically dibutyl tin dilaurate, and the dimethyl thiotoluene diamine is 3, 5-dimethyl thiotoluene diamine;
(3) The polyurethane elastomer A component and the polyurethane elastomer B component are mixed according to the mass ratio of 75:25, and then poured into a multi-cavity mold, and cured for 5 days at room temperature, so as to obtain a plurality of polyurethane elastic gaskets;
(4) Uniformly arranging a plurality of grooves on one surface of an upper sealing plate, a lower sealing plate and a multi-layer skeleton plate of the support, wherein the diameters of the grooves are matched with those of the polyurethane elastic gasket prepared in the step (1);
(5) After the surfaces of the bone plate, the upper sealing plate and the lower sealing plate are treated, a cold adhesive THIXON403 is coated, and the thickness of the adhesive is 25-40 mu m;
(6) The sealing plate and the framework plate are overlapped and placed in a sealable vacuum die according to a conventional method, and the polyurethane elastic gasket prepared in the step (1) is placed in grooves of the framework plate and the lower sealing plate, so that the sealing plate and the framework plate are spaced;
(7) And (3) mixing the polyurethane elastomer A component and the polyurethane elastomer B component according to the mass ratio of 75:25, pouring the mixture into a vacuum die in the step (4), continuously vacuumizing, solidifying for 5 days at room temperature, and demoulding to obtain the high-tensile high-bearing shock insulation support.
Example 4
A preparation method of a high-tensile high-bearing shock insulation support comprises the following specific steps:
(1) The preparation method of the polyurethane elastomer A component comprises the following steps: 50 parts by mass of polytetrahydrofuran glycol, 15 parts by mass of polypropylene oxide ether glycol and 30 parts by mass of diphenylmethane diisocyanate are reacted for 8 hours at 80 ℃; the number average molecular weight of polytetrahydrofuran glycol is 1000-3000, and the number average molecular weight of polypropylene oxide ether glycol is 1000-3000;
(2) The preparation method of the polyurethane elastomer B component comprises the following steps: uniformly mixing 30 parts by mass of dimethyl thiotoluene diamine, 10 parts by mass of polyether plasticizer TP-90B, 5 parts by mass of defoamer, 1 part by mass of catalyst and 4 parts by mass of antioxidant 1135 at room temperature; the defoaming agent is polyether modified silicon defoaming agent; the catalyst is triethylenediamine, and the dimethyl-thiotoluenediamine is 3, 5-dimethyl-thiotoluenediamine;
(3) The polyurethane elastomer A component and the polyurethane elastomer B component are mixed according to the mass ratio of 60:40, and then poured into a multi-cavity mold, and cured for 7 days at room temperature, so as to obtain a plurality of polyurethane elastic gaskets;
(4) Uniformly arranging a plurality of grooves on one surface of an upper sealing plate, a lower sealing plate and a multi-layer skeleton plate of the support, wherein the diameters of the grooves are matched with those of the polyurethane elastic gasket prepared in the step (1);
(5) After the surfaces of the bone plate, the upper sealing plate and the lower sealing plate are treated, a cold adhesive THIXON404 is coated, and the thickness of the adhesive is 25-40 mu m;
(6) The sealing plate and the framework plate are overlapped and placed in a sealable vacuum die according to a conventional method, and the polyurethane elastic gasket prepared in the step (1) is placed in grooves of the framework plate and the lower sealing plate, so that the sealing plate and the framework plate are spaced;
(7) And (3) mixing the polyurethane elastomer A component and the polyurethane elastomer B component according to the mass ratio of 60:40, pouring into the vacuum die in the step (4), continuously vacuumizing, solidifying for 7 days at room temperature, and demoulding to obtain the high-tensile high-bearing shock insulation support.
Comparative example 1
The components and parts by weight are as follows: 100 parts of natural rubber; petroleum resin, 5 parts; 20 parts of carbon black; 8 parts of plasticizer; 10 parts of vulcanizing agent; 4 parts of an anti-aging agent; conventional mixing, discharging sheets, and filling into a mold, and then vulcanizing at 125 ℃ under 15Mpa for 24 hours.
Table 1 shows the comparison of the performance data of the examples and comparative materials and the support
| Comparative example | Example 1 | Example 2 | Example 3 | Example 4 | |
| Tensile Strength/mpa | ＞15 | 30 | 35 | 40 | 42 |
| Elongation at break/% | ＞650 | 580 | 550 | 500 | 480 |
| hardness/A | 35～50 | 75 | 78 | 80 | 85 |
| Temperature range of application/. Degree.C | -40～60 | -35～80 | -40～80 | -45～80 | -50～80 |
| Shock insulation support yield strength/mpa | 1.5 | 3.8 | 4.0 | 4.4 | 5.3 |
| Ultimate tensile Strength/mpa of shock insulation support | 4 | 7.2 | 7.4 | 8.1 | 9.4 |
In summary, the invention discloses a high-tensile high-bearing shock insulation support and a preparation method thereof, wherein the preparation process is simple and environment-friendly, the composite material has good tensile strength and elongation at break in a wide temperature range, the yield strength of the prepared shock insulation support is higher than 3mpa, and the ultimate tensile stress is higher than 7mpa.
The above description of the embodiments is only for aiding in the understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (7)
1. The preparation method of the high-tensile high-bearing shock insulation support is characterized by comprising the following specific steps of:
(1) The polyurethane elastic gasket is obtained by pouring the polyurethane elastic body A component and the polyurethane elastic body B component into a multi-cavity mold after being mixed according to the mass ratio of 80:20-60:40, and curing at room temperature;
(2) Uniformly arranging a plurality of grooves on one surface of a support sealing plate and one surface of a multi-layer skeleton plate, wherein the diameters of the grooves are matched with those of the polyurethane elastic gasket prepared in the step (1);
(3) After the surfaces of the skeleton plate, the upper sealing plate and the lower sealing plate are treated, a cold adhesive is coated;
(4) The sealing plate and the skeleton plate are overlapped and placed in a sealable vacuum die according to a conventional method, and the polyurethane elastic gasket prepared in the step (1) is placed in grooves of the skeleton plate and the sealing plate;
(5) And (3) mixing the polyurethane elastomer A component and the polyurethane elastomer B component according to the mass ratio of 80:20-60:40, pouring into the vacuum mold in the step (4), continuously vacuumizing, curing at room temperature, and demolding to obtain the high-tensile high-bearing shock insulation support.
2. The method for preparing the high-tensile high-load-bearing shock insulation support according to claim 1, wherein the preparation method of the polyurethane elastomer A component in the step (1) is as follows: 20 to 50 parts by mass of polytetrahydrofuran glycol, 5 to 15 parts by mass of polypropylene oxide ether glycol and 15 to 30 parts by mass of diphenylmethane diisocyanate are reacted for 1 to 8 hours at the temperature of between 70 and 80 ℃ to prepare the modified polyurethane foam.
3. The method for preparing the high-tensile high-load-bearing shock insulation support according to claim 2, wherein the number average molecular weight of polytetrahydrofuran glycol is 1000-3000, and the number average molecular weight of polypropylene oxide ether glycol is 1000-3000.
4. The method for preparing the high-tensile high-load-bearing shock insulation support according to claim 1, wherein the method for preparing the polyurethane elastomer B component in the step (1) is as follows: 10 to 30 parts by mass of dimethyl thiotoluene diamine, 3 to 10 parts by mass of polyether plasticizer TP-90B, 2 to 5 parts by mass of defoamer, 0.1 to 1 part by mass of catalyst and 1 to 4 parts by mass of antioxidant 1135 are uniformly mixed at room temperature.
5. The method for preparing the high-tensile high-load-bearing shock insulation support according to claim 4, wherein the defoaming agent is polyether modified silicon defoaming agent; the catalyst is one of zinc octoate, dibutyl tin dilaurate and triethylenediamine, and the dimethyl thiotoluene diamine is 3, 5-dimethyl thiotoluene diamine.
6. The method for preparing the high-tensile high-load-bearing vibration-isolating support according to claim 1, wherein the cold adhesive in the step (3) is THIXON403 or THIXON404, and the thickness of the adhesive is 25-40 μm.
7. The method for preparing the high-tensile high-load-bearing shock insulation support according to claim 1, wherein the step (1) and the step (5) are cured for 2-7 days.
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