阅读说明：本技术 一种建筑隔震支座用特种橡胶及其制备方法 (Special rubber for building shock insulation support and preparation method thereof ) 是由 李俊 鲍俊瑶 毛旺龙 张文强 袁良鹏 赵旭 于 2019-12-19 设计创作，主要内容包括：本发明涉及橡胶材料技术领域,具体为一种建筑隔震支座用特种橡胶及其制备方法。本发明提出了一种建筑隔震支座用特种橡胶,包括以重量份计,其原料包括：青胶蒲公英橡胶85～100份、杜仲树橡胶20～30份、银色橡胶菊橡胶15～30份、丁腈橡胶30～40份、环氧化天然橡胶20～30份、AO-80 20～30份、白炭黑20～50份、纳米氧化锌3～8份等。本发明还提出上述的一种建筑隔震支座用特种橡胶的制备方法。本发明交联制备的高性能建筑隔震支座用特种橡胶,具有高强度、高柔性、高弹性、高阻尼的特点。在制成建筑隔震支座使用时,无需阻尼器等耗能装置配合,滞后性能高、能量存储耗散性能强,隔震效果好。(The invention relates to the technical field of rubber materials, in particular to special rubber for a building shock insulation support and a preparation method thereof. The invention provides a special rubber for a building shock insulation support, which comprises the following raw materials in parts by weight: 85-100 parts of green rubber dandelion rubber, 20-30 parts of eucommia ulmoides rubber, 15-30 parts of silver rubber chrysanthemum rubber, 30-40 parts of nitrile rubber, 20-30 parts of epoxidized natural rubber, 20-30 parts of AO-8020-30 parts of white carbon black, 3-8 parts of nano zinc oxide and the like. The invention also provides a preparation method of the special rubber for the building seismic isolation bearing. The special rubber for the high-performance building shock insulation support prepared by crosslinking has the characteristics of high strength, high flexibility, high elasticity and high damping. When the shock insulation support is manufactured into a building shock insulation support for use, the cooperation of energy consumption devices such as a damper and the like is not needed, the hysteresis performance is high, the energy storage and dissipation performance is strong, and the shock insulation effect is good.)

1. The special rubber for the building seismic isolation support is characterized by comprising the following raw materials in parts by weight:

85-100 parts of green rubber dandelion rubber, 20-30 parts of eucommia ulmoides rubber, 15-30 parts of silver rubber chrysanthemum rubber, 30-40 parts of nitrile rubber, 20-30 parts of epoxidized natural rubber, 20-30 parts of AO-8020-30 parts of white carbon black, 3-8 parts of nano zinc oxide, 2-6 parts of stearate, 2-6 parts of hydroxyl silicone oil, 2-6 parts of aluminum phosphate, 2-6 parts of sulfur, 1-5 parts of calcium carbonate, 1-5 parts of paraffin, 1-3 parts of anti-aging agent and 1-3 parts of accelerator.

2. The special rubber for the building seismic isolation bearing as claimed in claim 1, wherein AO-80 is a novel semi-hindered phenol antioxidant produced by Penglahong chemical Limited, specifically 3, 9-bis [1, 1-dimethyl-2- [ (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl ] -2,4,8, 10-tetraoxaspiro [5.5] undecane, molecular weight is 740.97, melting point is 123-124 ℃, and ash content is less than or equal to 0.1%.

3. The special rubber for the building seismic isolation bearing as claimed in claim 1, wherein the sum of the parts by weight of the green rubber dandelion rubber, the eucommia ulmoides rubber and the silver rubber chrysanthemum rubber, and the sum of the parts by weight of the nitrile rubber and AO-80 are as follows, and the ratio of the two parts is as follows: (Taraxacum rubber + eucommia rubber + Geum rubber): (nitrile rubber + AO-80) ═ 2.0 to 3.0): 1.

4. the special rubber for the building seismic isolation bearing as claimed in claim 1, wherein the weight ratio of the nitrile rubber to AO-80 is as follows: nitrile rubber: AO-80 ═ (1.0 to 1.6): 1.

5. the special rubber for the building seismic isolation bearing as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 95 parts of green rubber dandelion rubber, 25 parts of eucommia ulmoides rubber, 23 parts of silver rubber chrysanthemum rubber, 35 parts of nitrile rubber, 25 parts of epoxidized natural rubber, AO-8025 parts of white carbon black, 6 parts of nano zinc oxide, 4 parts of stearate, 4 parts of hydroxyl silicone oil, 5 parts of aluminum phosphate, 5 parts of sulfur, 3 parts of calcium carbonate, 3 parts of paraffin, 2 parts of anti-aging agent and 2 parts of accelerator.

6. The preparation method of the special rubber for the building seismic isolation bearing as claimed in claim 1, characterized by comprising the following steps:

s1, mixing and molding by an internal mixer: in an internal mixer milling chamber, adding the green rubber dandelion rubber, the eucommia ulmoides rubber and the silver rubber chrysanthemum rubber respectively according to parts by weight, mixing and milling for 5-10 min at the temperature of 85-90 ℃, adding the nitrile rubber, and mixing and milling for 3-5 min at the temperature of 90-95 ℃ to obtain a rubber mixed and moulded product;

s2, mixing by an internal mixer: adding the rubber plastic-blend product prepared in the step S1 into an internal mixer according to the parts by weight, pressurizing for 3-5 minutes, adding epoxidized natural rubber, AO-80, white carbon black, nano zinc oxide, stearate and an anti-aging agent, and pressurizing and internally mixing for 15-20 min; then adding hydroxyl silicone oil, aluminum phosphate, calcium carbonate and paraffin, and banburying for 5-7 min; finally, adding sulfur and an accelerator, banburying for 3-5 min, and discharging to obtain a mixed material;

s3, vulcanization: and (5) pressurizing and vulcanizing the mixed material prepared in the step S2 to obtain the special rubber for the building seismic isolation bearing.

7. The method for preparing special rubber for building seismic isolation bearings as claimed in claim 7, wherein in the step of S3 vulcanization, the pressure vulcanization is carried out, specifically by injection molding technology, and the mixed material is directly vulcanized on the middle clamping plate of the seismic isolation bearing in a mold.

Technical Field

The invention relates to the technical field of rubber materials, in particular to special rubber for a building shock insulation support and a preparation method thereof.

Background

Earthquake is a sudden and natural disaster which is difficult to predict, and often brings about serious casualties and property loss. Improving the earthquake resistance of buildings is an important way to resist earthquake damage and reduce casualties and property loss.

The traditional steel-method earthquake resistance is to resist the earthquake and ensure the personal and property safety by enhancing the bearing and resisting capability of the building structure, such as rigidity, ductility and other performances. The traditional anti-seismic method can be effective in resisting small-scale ground expansion, but the required rigidity and strength requirements are difficult to meet when large-scale earthquakes occur, and the cost for increasing the anti-seismic capacity of the structure is very high. The developed basic shock-insulation technology is a new technology for building shock resistance and disaster reduction, and the developed rubber shock-insulation support is widely applied in developed countries and is effectively proved.

The rubber shock isolation support is mainly formed by alternately superposing thin layers of rubber and middle steel plates through high-temperature and pressure vulcanization, and the tight combination of the rubber and the steel plates ensures that the steel plates have enough deformation constraint on the rubber layers and have higher horizontal deformation capability of the palea in vertical bearing capability. When earthquake occurs, vibration energy is converted into heat energy by the damping performance of the rubber and the viscoelasticity of the rubber, so that a part of earthquake energy can be dissipated, the amplitude is reduced, and the effect of shock insulation is achieved.

At present, the thin layer rubber in the rubber shock insulation support is generally made of pure natural rubber. The natural rubber shock insulation support has high elasticity and good restoring force in the horizontal direction, but the high damping characteristic required by the shock insulation support cannot be met due to the lower damping value of the pure natural rubber, and the natural rubber shock insulation support has low hysteresis performance and weak energy storage and consumption performance. And when the natural rubber support is actually used, the natural rubber support is usually matched with energy consumption devices such as a damper and the like, the structure is complex, the installation is troublesome, and the energy consumption is high. The thin layer rubber in the existing rubber shock insulation support can not meet the requirements of high strength, high flexibility, high elasticity and high damping of the rubber for the high-performance shock insulation support, and the shock insulation effect is not ideal.

Disclosure of Invention

The invention aims to provide special rubber for a building seismic isolation bearing and a preparation method thereof, and aims to solve the problems in the background art.

The purpose of the invention can be realized by the following technical scheme:

a special rubber for building seismic isolation supports comprises the following raw materials in parts by weight: 85-100 parts of green rubber dandelion rubber, 20-30 parts of eucommia ulmoides rubber, 15-30 parts of silver rubber chrysanthemum rubber, 30-40 parts of nitrile rubber, 20-30 parts of epoxidized natural rubber, 20-30 parts of AO-8020-30 parts of white carbon black, 3-8 parts of nano zinc oxide, 2-6 parts of stearate, 2-6 parts of hydroxyl silicone oil, 2-6 parts of aluminum phosphate, 2-6 parts of sulfur, 1-5 parts of calcium carbonate, 1-5 parts of paraffin, 1-3 parts of anti-aging agent and 1-3 parts of accelerator.

Preferably, the AO-80 is a novel semi-hindered phenol antioxidant produced by Pennlong chemical Limited, specifically 3, 9-bis [1, 1-dimethyl-2- [ (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl ] -2,4,8, 10-tetraoxaspiro [5.5] undecane, the molecular weight is 740.97, the melting point is 123-124 ℃, and the ash content is less than or equal to 0.1%.

Preferably, the ratio of the sum of the parts by weight of the green rubber dandelion rubber, the eucommia ulmoides rubber and the silver rubber chrysanthemum rubber to the sum of the parts by weight of the nitrile rubber and the AO-80 is as follows: (Taraxacum rubber + eucommia rubber + Geum rubber): (nitrile rubber + AO-80) ═ 2.0 to 3.0): 1.

preferably, the weight ratio of the nitrile rubber to AO-80 is: nitrile rubber: AO-80 ═ (1.0 to 1.5): 1.

preferably, the raw materials comprise the following components in parts by weight: 95 parts of green rubber dandelion rubber, 25 parts of eucommia ulmoides rubber, 23 parts of silver rubber chrysanthemum rubber, 35 parts of nitrile rubber, 25 parts of epoxidized natural rubber, AO-8025 parts of white carbon black, 6 parts of nano zinc oxide, 4 parts of stearate, 4 parts of hydroxyl silicone oil, 5 parts of aluminum phosphate, 5 parts of sulfur, 3 parts of calcium carbonate, 3 parts of paraffin, 2 parts of anti-aging agent and 2 parts of accelerator.

A preparation method of special rubber for building seismic isolation supports comprises the following steps:

s1, mixing and molding by an internal mixer: in an internal mixer milling chamber, adding the green rubber dandelion rubber, the eucommia ulmoides rubber and the silver rubber chrysanthemum rubber respectively according to parts by weight, mixing and milling for 5-10 min at the temperature of 85-90 ℃, adding the nitrile rubber, and mixing and milling for 3-5 min at the temperature of 90-95 ℃ to obtain a rubber mixed and moulded product;

s2, mixing by an internal mixer: adding the rubber plastic-blend product prepared in the step S1 into an internal mixer according to the parts by weight, pressurizing for 3-5 minutes, adding epoxidized natural rubber, AO-80, white carbon black, nano zinc oxide, stearate and an anti-aging agent, and pressurizing and internally mixing for 15-20 min; then adding hydroxyl silicone oil, aluminum phosphate, calcium carbonate and paraffin, and banburying for 5-7 min; finally, adding sulfur and an accelerator, banburying for 3-5 min, and discharging to obtain a mixed material;

s3, vulcanization: and (5) pressurizing and vulcanizing the mixed material prepared in the step S2 to obtain the special rubber for the building seismic isolation bearing.

Preferably, in the step of vulcanization at S3, the press vulcanization, in particular, the molding compound is directly vulcanized on the middle clamping plate of the seismic isolation bearing in the mold by an injection molding technology.

The invention has the beneficial effects that:

the invention relates to a special rubber for building shock insulation supports and a preparation method thereof.A natural rubber such as green rubber dandelion rubber, eucommia ulmoides rubber, silver rubber chrysanthemum rubber and the like is adopted to replace the traditional natural rubber, the natural rubber is blended with nitrile rubber, epoxidized natural rubber is introduced to serve as a compatilizer, the natural rubber serves as a continuous phase, the nitrile rubber and semi-hindered phenol antioxidant A0-80 serve as a disperse phase, the continuous phase can be stretched and crystallized and the disperse phase can be stretched and oriented under the condition of large deformation, the compatilizer epoxidized natural rubber between the two has the functions of improving compatibility and dispersion, and the epoxidized natural rubber is distributed at the interface of the two to help a damping phase to rebound better, so that the system has various performances. The special rubber for the high-performance building shock insulation support prepared by crosslinking has the characteristics of high strength, high flexibility, high elasticity and high damping. When the building shock insulation support made of the special rubber for the building shock insulation support is used, the cooperation of energy consumption devices such as a damper and the like is not needed, and the building shock insulation support is high in hysteresis performance, strong in energy storage and dissipation performance and good in shock insulation effect.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention will be further described with reference to specific examples.