CN111253630A - High-damping composition for building shock-insulation rubber support and building high-damping shock-insulation rubber support - Google Patents
High-damping composition for building shock-insulation rubber support and building high-damping shock-insulation rubber support Download PDFInfo
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- CN111253630A CN111253630A CN202010260578.6A CN202010260578A CN111253630A CN 111253630 A CN111253630 A CN 111253630A CN 202010260578 A CN202010260578 A CN 202010260578A CN 111253630 A CN111253630 A CN 111253630A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
A high-damping composition for a building shock-insulation rubber support and the building high-damping shock-insulation rubber support prepared from the high-damping composition. The high-damping composition is prepared by taking natural rubber and butadiene rubber as rubber main bodies and assisting a special metal activation system, a vulcanization system, an anti-aging system, a filling system, a plasticizing system, a scorch retarder and an antioxidant reducing agent in a specific ratio. Scientific raw material proportion, simple preparation and low cost. The modulus of the building high-damping shock-insulation rubber support prepared from the high-damping composition reaches 0.34-0.49 when the support is used, the damping ratio reaches 18-24%, and the support has good low-temperature performance and fatigue performance.
Description
Technical Field
The invention relates to the technical field of building shock insulation and earthquake resistance, in particular to a high-damping composition for a building shock insulation rubber support and the building high-damping shock insulation rubber support.
Background
The high-damping shock-isolating rubber bearing for building is a shock-isolating device formed by superposing and integrally vulcanizing multiple layers of internal high-damping compositions and multiple layers of internal steel plates. The high-damping rubber support absorbs and dissipates vibration energy through the high-damping characteristic of rubber, has strong self-recovery capability and environment-friendly materials, can overcome the defects of the lead core rubber support, and belongs to the rubber support with the advantages of environmental protection, energy saving and consumption reduction. However, the preparation of the high-damping rubber material is a design difficulty, and the natural rubber has the characteristics of tensile crystallization, is easy to deform and has high breaking strength, but has poor damping performance.
In recent years, people have attracted attention to building high-damping vibration-isolating rubber supports, such as: an ultra-high damping vibration isolation support material (patent number: CN106279803A), a high damping vibration isolation support material (patent number: CN106220907A), a high damping composition, a preparation method thereof, a product (patent number: CN 104893300A) obtained by the high damping composition and a high damping composition (patent number: CN 102863657A), but the patents and the technologies have the following problems:
1) in order to clarify the use requirement of the building shock insulation rubber support, the large deformation capacity of the building shock insulation rubber support is required to be not less than 400 percent. Therefore, the shear modulus of the rubber is lower than that of the bridge. The low modulus is how applicable the high damping rubber material is, and whether the damping ratio can meet the use requirements.
2) The low temperature properties of the high damping composition material itself are not clear. The high-damping common condition meets the requirement of a damping ratio, and simultaneously the low-temperature performance is difficult to meet the requirement that the performance change of the building seismic isolation rubber support at the low temperature level of-20-40 ℃ is not more than 25%.
3) The fatigue properties of the high damping composition material itself are not clear. The high damping is usually required, and meanwhile, the damping ratio is increased, so that the use requirement of the shock insulation rubber support of the building cannot be met.
Disclosure of Invention
The invention aims to provide a high-damping composition for a building shock-insulation rubber support, which has the characteristics of low modulus and high damping ratio, and the temperature dependence, low-temperature performance and fatigue performance of the composition meet the use requirements of the building shock-insulation rubber support.
The second purpose of the invention is to provide a high-damping shock-insulation rubber support for buildings, which is prepared from the high-damping composition.
A high-damping composition for a shock-insulation rubber support of a building comprises the following components in parts by weight:
70-80 parts of natural rubber, 20-30 parts of butadiene rubber, 7-14 parts of a metal activation system, 2-7 parts of a vulcanization system, 4-12 parts of an anti-aging system, 80-135 parts of a filling system, 14-28 parts of a plasticizing system, 0.3-1 part of an anti-scorching agent and 1-2 parts of an antioxidant reducing agent.
A high-damping shock-insulation rubber support for buildings is prepared from the high-damping composition.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a high-damping composition for a building shock-insulation rubber support and the building high-damping shock-insulation rubber support prepared from the high-damping composition. The high-damping composition is prepared by taking natural rubber and butadiene rubber as rubber main bodies and matching a special metal activation system, a vulcanization system, an anti-aging system, a filling system, a plasticizing system, an anti-scorching agent and an antioxidant reducing agent according to a specific proportion. Scientific raw material proportion, simple preparation and low cost. The modulus of the building high-damping shock-insulation rubber support prepared from the high-damping composition reaches 0.34-0.49 when the support is used, the damping ratio reaches 18-24%, and the support has good low-temperature performance and fatigue performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The invention provides a high-damping composition for a building seismic isolation rubber bearing and a building high-damping seismic isolation rubber bearing.
The invention discloses a high-damping composition for a building shock insulation rubber support, which comprises the following components in parts by weight:
70-80 parts of natural rubber, 20-30 parts of butadiene rubber, 7-14 parts of a metal activation system, 2-7 parts of a vulcanization system, 4-12 parts of an anti-aging system, 80-135 parts of a filling system, 14-28 parts of a plasticizing system, 0.3-1 part of an anti-scorching agent and 1-2 parts of an antioxidant reducing agent.
Preferably, the high damping composition comprises, in parts by weight:
73-78 parts of natural rubber, 23-28 parts of butadiene rubber, 9-12 parts of a metal activation system, 3-5 parts of a vulcanization system, 6-10 parts of an anti-aging system, 90-120 parts of a filling system, 16-25 parts of a plasticizing system, 0.5-1 part of an anti-scorching agent and 1-1.5 parts of an antioxidant reducing agent.
Wherein the metal activation system comprises zinc oxide and stearic acid. The metal activation system can ensure the activity of the vulcanization system and ensure the smooth operation of the rubber vulcanization process. Preferably, the mass ratio of the zinc oxide to the stearic acid is 5-10: 2 to 4. The activation effect of the metal activation system prepared according to the proportion is better.
The vulcanization system comprises a vulcanizing agent S-80, an accelerator TMTD and an accelerator TRA. Preferably, the mass ratio of the vulcanizing agent S-80 to the accelerator TMTD to the accelerator TRA is 0.8-3: 0.4-1: 0.6 to 3. The dosage of the vulcanizing agent needs to be matched with that of the accelerator, so that the obtained vulcanized rubber has high tensile strength and good wear resistance and fatigue crack resistance. In addition, the embodiment of the invention also reduces the consumption of sulfur according to the low-temperature performance of the seismic isolation support, and the lower the vulcanization consumption, the better the low-temperature performance.
The anti-aging system comprises an anti-aging agent RD, an anti-aging agent NBC, an anti-fatigue agent PL-600 and microcrystalline wax; preferably, the mass ratio of the antioxidant RD to the antioxidant NBC to the antifatigue PL-600 to the microcrystalline wax is 1-3: 1-3: 1.5-4: 0.5 to 2. The anti-aging system provided by the embodiment of the invention is scientifically prepared and used for ensuring the thermal aging performance, the ozone aging resistance and the fatigue performance of the shock insulation support. The dosage of the anti-fatigue agent is increased, and the fatigue performance of the shock insulation support is better. Wherein, the ozone aging resistance of the vulcanized rubber can be improved by increasing the usage amount of the anti-aging agent NBC and the microcrystalline wax.
The filling system comprises a damping agent A0-80, a tackifying resin RX-60, a homogenizing agent A78, carbon black N115 and carbon black N339; preferably, the mass ratio of the damping agent A0-80 to the tackifying resin RX-60 to the homogenizing agent A78 to the carbon black N115 to the carbon black N339 is 5-10: 10-15: 5-10: 30-45: 30 to 55. The filling system can provide the damping ratio of the high damping composition, and in addition, the adjustment and guarantee of the range of the shear modulus of the high damping composition. The damping agent A0-80, the carbon black N115 and the carbon black N339 are added mainly to ensure the adjustment of the damping ratio of the high-damping composition, and the damping is also large when the using amount is larger. Besides, the tackifying resin RX-60 and the homogenizing agent A78 ensure the processability of the rubber compound and are beneficial to the uniform dispersion of the rubber compound. Meanwhile, the necessary means for reducing the damping ratio attenuation of the vibration isolation support is also reduced.
The plasticizing system includes plasticizer TOTM and plasticizer DOP; preferably, the mass ratio of the plasticizer TOTM to the plasticizer DOP is 10-18: 4 to 10. The plasticizing system is primarily used to adjust the shear modulus and low temperature properties of the high damping composition. The increase of the dosage of the plasticizer TOTM and the plasticizer DOP is beneficial to improving the low-temperature performance of the rubber material and ensuring that the temperature dependence of the high-damping shock-insulation rubber support meets the use requirement.
The scorch retarder is the scorch retarder NDPA or the scorch retarder E/C. The scorch retarder can prevent the rubber compound from generating early vulcanization in the processing process. However, excessive use of scorch retarders can affect the processability of the rubber compound. The scorch retarder adopted in the embodiment is screened by the inventor, and the mixing effect of the scorch retarder NDPA or the scorch retarder E/C and the rest components is better.
The antioxidant reducing agent is antioxidant reducing agent HTS. The oxidation-reducing agent HTS acts as a post-cure stabilized anti-reversion accelerator that increases the resistance to changes in crosslink density due to over-vulcanization, high temperature vulcanization and anaerobic aging, thereby avoiding the deterioration of the physical and dynamic properties associated with reversion.
A high-damping shock-insulation rubber support for buildings is prepared from the high-damping composition. The elastic modulus of the high-damping shock-insulation rubber support for the building is 0.34-0.49, and the damping ratio is 18% -24%. And has better low-temperature performance and fatigue performance.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a high damping composition for a shock insulation rubber support of a building, which comprises the following components in parts by weight:
75 parts of natural rubber (SCR WF), 25 parts of BR butadiene rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 800.8 parts of vulcanizing agent S, 0.4 part of accelerator TMTD, 0.6 part of accelerator TRA, 2 parts of antioxidant RD, 2 parts of antioxidant NBC, 2 parts of anti-fatigue agent PL-6002, 1 part of microcrystalline wax, 0-805 parts of damping agent A, RX-6010 part of tackifying resin, 785 parts of homogenizing agent A, 11530 parts of carbon black N, 33930 parts of carbon black N, 10 parts of plasticizer TOTM, 4 parts of plasticizer DOP, 0.3 part of scorch retarder NDPA and 1 parts of antioxidant reducing agent HTS.
Example 2
The embodiment provides a high damping composition for a shock insulation rubber support of a building, which comprises the following components in parts by weight:
75 parts of natural rubber (SCR WF), 25 parts of BR butadiene rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 800.8 parts of vulcanizing agent S, 0.4 part of accelerator TMTD, 0.6 part of accelerator TRA, 2 parts of antioxidant RD, 2 parts of antioxidant NBC, 2 parts of anti-fatigue agent PL-6002 parts, 1 part of microcrystalline wax, 0-805 parts of damping agent A, RX-6015 parts of tackifying resin, 785 parts of homogenizing agent A, 11540 parts of carbon black N, 33940 parts of carbon black N, 10 parts of plasticizer TOTM, 6 parts of plasticizer DOP, 0.3 part of anti-scorching agent NDPA and 1 part of antioxidant reducing agent HTS.
Example 3
The embodiment provides a high damping composition for a shock insulation rubber support of a building, which comprises the following components in parts by weight:
75 parts of natural rubber (SCR WF), 25 parts of BR butadiene rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 800.8 parts of vulcanizing agent S, 0.4 part of accelerator TMTD, 0.6 part of accelerator TRA, 2 parts of antioxidant RD, 2 parts of antioxidant NBC, 2 parts of anti-fatigue agent PL-6002, 1 part of microcrystalline wax, 0-8010 parts of damping agent A, RX-6015 parts of tackifying resin, 785 parts of homogenizing agent A, 11545 parts of carbon black N, 33945 parts of carbon black N, 10 parts of plasticizer TOTM, 8 parts of plasticizer DOP, 0.3 part of anti-scorching agent NDPA and 1 part of antioxidant reducing agent HTS.
Example 4
The embodiment provides a high damping composition for a shock insulation rubber support of a building, which comprises the following components in parts by weight:
70 parts of natural rubber (SCR WF), 30 parts of BR butadiene rubber, 10 parts of zinc oxide, 4 parts of stearic acid, S-803 parts of vulcanizing agent, 1 part of accelerator TMTD, 3 parts of accelerator TRA, 1 part of antioxidant RD, 1 part of antioxidant NBC, 0.5 part of anti-fatigue agent PL-6001.5, 0.5 part of microcrystalline wax, 0-805 parts of damping agent A, RX-605 parts of tackifying resin, 7810 part of homogenizing agent A, 11530 parts of carbon black N, 33930 parts of carbon black N, 18 parts of plasticizer TOTM, 10 parts of plasticizer DOP, 1 part of anti-scorching agent NDPA and 2 parts of antioxidant reducing agent HTS.
Example 5
The embodiment provides a high damping composition for a shock insulation rubber support of a building, which comprises the following components in parts by weight:
65 parts of natural rubber (SCR WF), 35 parts of BR butadiene rubber, 5 parts of zinc oxide, 2 parts of stearic acid, S-802 parts of vulcanizing agent, 0.6 part of accelerator TMTD, 1.5 parts of accelerator TRA, 3 parts of antioxidant RD, 3 parts of antioxidant NBC, 3 parts of anti-fatigue agent PL-6004 parts, 2 parts of microcrystalline wax, 0-8010 parts of damping agent A, RX-6015 parts of tackifying resin, 788 parts of homogenizing agent A, N11530 parts of carbon black, N33930 parts of carbon black, 10 parts of plasticizer TOTM, 4 parts of plasticizer DOP, 0.6 part of anti-scorching agent NDPA and 1.5 parts of antioxidant reducing agent HTS.
Test example 1
The high-damping rubber bearing for the building is prepared by using the high-damping composition provided by the embodiment 1-5. The shear modulus and the equivalent damping ratio of the support are tested by a shear performance method 6.3.2 of GB/T20688.1-2007 test method for the part 1 vibration isolation rubber support of the rubber support, and the test results are shown in Table 1.
TABLE 1 shear modulus and equivalent damping ratio performance test of high-damping shock-insulation rubber bearing for building
| Shear modulus G | Equivalent damping ratio | |
| Example 1 | 0.34 | 18.70% |
| Example 2 | 0.392 | 20.41% |
| Example 3 | 0.49 | 24.37% |
| Example 4 | 0.49 | 18.45% |
| Example 5 | 0.34 | 24.17% |
As shown in Table 1, the high-damping rubber support for building prepared by the high-damping composition provided by the embodiments 1 to 5 has an elastic modulus as low as 0.34 to 0.49 and a damping ratio as high as 18 to 24%. Excellent mechanical performance and wide application range.
Test example 2
The high-damping rubber bearing for the building is prepared by using the high-damping composition provided by the embodiment 1-5. The change rate of the equivalent damping ratio of the support at-20 ℃ to 40 ℃ is tested by adopting a temperature-related performance method of shear performance in GB/T20688.1-2007 test method for part 1 vibration isolation rubber support of rubber support 6.4.5, and the test result is shown in Table 2.
TABLE 2 temperature dependency test of equivalent damping ratio of high-damping shock-insulation rubber bearing for building
As shown in Table 2, the high-damping rubber support for building prepared by the high-damping composition provided by the embodiments 1-5 has a temperature dependency within + -25% at-20-40 ℃, and has a good application range.
Test example 3
The high-damping rubber bearing for the building is prepared by using the high-damping composition provided by the embodiment 1-5. The durability of the 7.5 building shock insulation rubber support of JG/T118-2018 is adopted to test the fatigue performance, and the test result is shown in Table 3.
TABLE 3 fatigue performance test of equivalent damping ratio of high-damping shock-insulation rubber bearing for building
| Before fatigue | After fatigue | Rate of change | |
| Example 1 | 0.187 | 0.1602 | -14.31% |
| Example 2 | 0.2041 | 0.1739 | -14.78% |
| Example 3 | 0.2437 | 0.2109 | -13.45% |
| Example 4 | 0.1845 | 0.1653 | -10.42% |
| Example 5 | 0.2417 | 0.2141 | -11.42% |
As shown in Table 2, the high-damping rubber bearing for building prepared by the high-damping composition provided by the embodiments 1-5 has a fatigue performance of 50 cycles, a change rate of the fatigue performance before and after fatigue performance test is within a range of +/-15%, and has good fatigue resistance.
In conclusion, the invention discloses a high-damping composition for a building seismic isolation rubber bearing and a building high-damping seismic isolation rubber bearing prepared from the high-damping composition. The high-damping composition is prepared by taking natural rubber and butadiene rubber as rubber main bodies and matching a special metal activation system, a vulcanization system, an anti-aging system, a filling system, a plasticizing system, an anti-scorching agent and an antioxidant reducing agent according to a specific proportion. Scientific raw material proportion, simple preparation and low cost. The modulus of the building high-damping shock-insulation rubber support prepared from the high-damping composition reaches 0.34-0.49 when the support is used, the damping ratio reaches 18-24%, and the support has good low-temperature performance and fatigue performance.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A high-damping composition for a shock-insulation rubber support of a building is characterized by comprising the following components in parts by weight:
70-80 parts of natural rubber, 20-30 parts of butadiene rubber, 7-14 parts of a metal activation system, 2-7 parts of a vulcanization system, 4-12 parts of an anti-aging system, 80-135 parts of a filling system, 14-28 parts of a plasticizing system, 0.3-1 part of an anti-scorching agent and 1-2 parts of an antioxidant reducing agent.
2. The high damping composition for building isolation rubber mount of claim 1, wherein the metal activation system comprises zinc oxide and stearic acid; preferably, the mass ratio of the zinc oxide to the stearic acid is 5-10: 2 to 4.
3. The high damping composition for building isolation rubber mount of claim 1, wherein the vulcanization system comprises vulcanizing agent S-80, accelerator TMTD and accelerator TRA; preferably, the mass ratio of the vulcanizing agent S-80 to the accelerator TMTD to the accelerator TRA is 0.8-3: 0.4-1: 0.6 to 3.
4. The high damping composition for building vibration-isolating rubber mounts according to claim 1, wherein the anti-aging system comprises an anti-aging agent RD, an anti-aging agent NBC, an anti-fatigue agent PL-600 and microcrystalline wax; preferably, the mass ratio of the antioxidant RD, the antioxidant NBC, the anti-fatigue agent PL-600 and the microcrystalline wax is 1-3: 1-3: 1.5-4: 0.5 to 2.
5. The high damping composition for building vibration-isolating rubber mounts according to claim 1, wherein the filling system comprises damping agent A0-80, tackifying resin RX-60, homogenizing agent A78, carbon black N115 and carbon black N339; preferably, the mass ratio of the damping agent A0-80 to the tackifying resin RX-60 to the homogenizing agent A78 to the carbon black N115 to the carbon black N339 is 5-10: 10-15: 5-10: 30-45: 30 to 55.
6. The high damping composition for building seismic isolation rubber mount according to claim 1, wherein said plasticizing system comprises plasticizer TOTM and plasticizer DOP; preferably, the mass ratio of the plasticizer TOTM to the plasticizer DOP is 10-18: 4 to 10.
7. The high damping composition for building seismic isolation rubber mounts according to claim 1, wherein the scorch retarder is a scorch retarder NDPA or a scorch retarder E/C.
8. The high damping composition for building vibration-isolating rubber bearing according to claim 1, wherein the antioxidant reducing agent is antioxidant reducing agent HTS.
9. A high-damping shock-insulation rubber support for buildings is characterized by being prepared from the high-damping composition as claimed in any one of claims 1 to 8.
10. The high-damping vibration-isolating rubber support for the building as claimed in claim 9, wherein the modulus of elasticity of the high-damping vibration-isolating rubber support for the building is 0.34-0.49, and the damping ratio is 18% -24%.
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| CN113185756A (en) * | 2021-05-08 | 2021-07-30 | 清华大学 | Magnetic sensitive rubber composition and preparation method thereof |
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