Flame-retardant rubber material and shock insulation rubber support

Abstract

The invention belongs to the technical field of building materials, and provides a flame-retardant rubber material and a shock insulation rubber support. The flame-retardant rubber material comprises the following components in parts by mass: 40-60 parts of chloroprene rubber, 40-60 parts of chlorinated polyethylene, 20-50 parts of aluminum oxide, 20-40 parts of white carbon black, 10-30 parts of a plasticizer, 1.8-3 parts of an accelerant, 3-8 parts of magnesium oxide and 5-8 parts of zinc oxide. The chloroprene rubber and the chlorinated polyethylene which have flame-retardant functions are used as rubber matrixes, and the aluminum oxide and the white carbon black which have flame-retardant functions are used as reinforcing agents, so that the flame-retardant property reaches the B1 level while the mechanical property of the shock insulation rubber support is met; the outer side of the shock insulation rubber support is sequentially wrapped with the aerogel material and coated with the waterproof agent, the heat conductivity coefficient of the aerogel material is low, the construction difficulty can be effectively lowered, the shock insulation rubber support cannot lose efficacy due to water absorption, and the flame retardant property of the shock insulation rubber support is further enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a flame retardant rubber material and a seismic isolation rubber bearing. Background Art

[0002] Seismic isolation rubber bearings are generally made of natural rubber and steel plates. Natural rubber contains a large number of unsaturated double bonds, has high chemical activity, and is prone to aging and burning. Seismic isolation rubber bearings are generally used in high-rise buildings or residential buildings. When a fire occurs, the flammable nature of natural rubber will cause the seismic isolation rubber bearings to lose their corresponding functions.

[0003] The fire prevention measure of traditional seismic isolation rubber bearings is to wrap fireproof materials such as aluminum silicate wool on the outside of the seismic isolation rubber bearings. This measure requires wrapping a large amount of fireproof materials to meet the fire prevention requirements, and has high requirements for construction. Since such fireproof materials will lose their fireproof properties after absorbing moisture, they cannot protect the seismic isolation rubber bearings well.

[0004] Based on this, developing a rubber material with excellent flame retardant effect and fire prevention measures is of great significance for the use of seismic isolation rubber bearings. Summary of the invention

[0005] The purpose of the present invention is to provide a flame retardant rubber material and a seismic isolation rubber bearing in view of the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The invention provides a flame retardant rubber material, comprising the following components in parts by mass: 40-60 parts of chloroprene rubber, 40-60 parts of chlorinated polyethylene, 20-50 parts of aluminum oxide, 20-40 parts of white carbon black, 10-30 parts of a plasticizer, 1.8-3 parts of an accelerator, 3-8 parts of magnesium oxide, and 5-8 parts of zinc oxide.

[0008] Preferably, the chloroprene rubber is a non-sulfur-adjusted chloroprene rubber, and the mass content of chlorine in the non-sulfur-adjusted chloroprene rubber is ≥30%.

[0009] Preferably, the mass content of chlorine in the chlorinated polyethylene is 33-37%, the tensile strength of the chlorinated polyethylene is ≥10 MPa, and the elongation at break is ≥700%.

[0010] Preferably, the particle size of the aluminum oxide is 20 to 30 nm, and the specific surface area of ​​the aluminum oxide is 100 to 200 m 2 / g.

[0011] Preferably, the specific surface area of ​​the white carbon black is 150 to 200 m 2 / g, the mass content of silicon dioxide in white carbon black is ≥95%.

[0012] Preferably, the plasticizer is a flame retardant plasticizer, and the accelerator is a thiourea accelerator.

[0013] The present invention also provides a seismic isolation rubber bearing comprising the flame retardant rubber material, the rubber material used for the body of the seismic isolation rubber bearing is the flame retardant rubber material, the outer side of the seismic isolation rubber bearing is wrapped with aerogel material, and the outer side of the aerogel material is coated with a waterproofing agent.

[0014] Preferably, the aerogel material is porous vacuum silicon, the number of the wrapped layers of the porous vacuum silicon is 1 to 3 layers, and the thickness of each layer of the porous vacuum silicon is 1 to 4 mm.

[0015] Preferably, the waterproofing agent is a silicone waterproofing agent or a hydrophobic coating, and the thickness of the waterproofing agent is 0.1 to 2 mm.

[0016] Beneficial effects of the present invention:

[0017] The present invention adopts chloroprene rubber and chlorinated polyethylene with flame retardant function as the rubber matrix, and alumina and white carbon black with flame retardant function as reinforcing agents, so as to achieve the flame retardant performance of B1 level while meeting the mechanical properties of the seismic isolation rubber bearing; the outer side of the seismic isolation rubber bearing is sequentially wrapped with aerogel material and coated with a waterproofing agent. The thermal conductivity of the aerogel material is low, which can effectively reduce the difficulty of construction and will not fail due to water absorption, thereby further enhancing the flame retardant performance of the seismic isolation rubber bearing. DETAILED DESCRIPTION

[0018] The invention provides a flame retardant rubber material, comprising the following components in parts by mass: 40-60 parts of chloroprene rubber, 40-60 parts of chlorinated polyethylene, 20-50 parts of aluminum oxide, 20-40 parts of white carbon black, 10-30 parts of a plasticizer, 1.8-3 parts of an accelerator, 3-8 parts of magnesium oxide, and 5-8 parts of zinc oxide.

[0019] In the present invention, the flame retardant rubber material comprises, by mass, 40 to 60 parts of chloroprene rubber, preferably 45 to 55 parts, and more preferably 50 parts; 40 to 60 parts of chlorinated polyethylene, preferably 45 to 55 parts, and more preferably 50 parts; 20 to 50 parts of aluminum oxide, preferably 25 to 45 parts, and more preferably 30 to 40 parts, and more preferably 35 parts; 20 to 40 parts of white carbon black, preferably 25 to 35 parts, and more preferably 30 parts; 10 to 30 parts of plasticizer, preferably 15 to 25 parts, and more preferably 20 parts; 1.8 to 3 parts of accelerator, preferably 2.0 to 2.6 parts, and more preferably 2.2 to 2.4 parts; 3 to 8 parts of magnesium oxide, preferably 4 to 7 parts, and more preferably 5 to 6 parts; and 5 to 8 parts of zinc oxide, preferably 6 to 7 parts.

[0020] In the present invention, the chloroprene rubber is preferably non-sulfur-adjusted chloroprene rubber, and the mass content of chlorine in the non-sulfur-adjusted chloroprene rubber is preferably ≥30%, more preferably ≥35%, and more preferably ≥40%.

[0021] In the present invention, the mass content of chlorine in the chlorinated polyethylene is preferably 33-37%, more preferably 34-36%, and more preferably 35%; the tensile strength of the chlorinated polyethylene is preferably ≥10MPa, more preferably ≥12MPa, and more preferably ≥15MPa; the elongation at break is preferably ≥700%, more preferably ≥750%, and more preferably ≥800%.

[0022] In the present invention, the particle size of the aluminum oxide is preferably 20 to 30 nm, more preferably 22 to 28 nm, and more preferably 25 nm; the specific surface area of ​​the aluminum oxide is preferably 100 to 200 m 2 / g, more preferably 120 to 180 m 2 / g, more preferably 150m 2 / g.

[0023] In the present invention, the specific surface area of ​​the white carbon black is preferably 150 to 200 m 2 / g, more preferably 160 to 190 m 2 / g, more preferably 170 to 180 m 2 / g; the mass content of silicon dioxide in white carbon black is preferably ≥95%, and more preferably ≥98%.

[0024] In the present invention, the plasticizer is preferably a flame retardant plasticizer, and the accelerator is preferably a thiourea accelerator.

[0025] In the present invention, the flame retardant plasticizer is preferably ditolyl phosphate or triphenyl phosphate, and the magnesium oxide is preferably active magnesium oxide.

[0026] The present invention also provides a seismic isolation rubber bearing comprising the flame retardant rubber material, the rubber material used for the body of the seismic isolation rubber bearing is the flame retardant rubber material, the outer side of the seismic isolation rubber bearing is wrapped with aerogel material, and the outer side of the aerogel material is coated with a waterproofing agent.

[0027] In the present invention, the aerogel material is preferably porous vacuum silicon, and the number of wrapped layers of porous vacuum silicon is preferably 1 to 3 layers, more preferably 2 layers; the thickness of each layer of porous vacuum silicon is preferably 1 to 4 mm, more preferably 2 to 3 mm.

[0028] In the present invention, the waterproofing agent is preferably a silicone waterproofing agent or a hydrophobic coating, and the thickness of the waterproofing agent is preferably 0.1 to 2 mm, more preferably 0.5 to 1.5 mm, and more preferably 1 mm.

[0029] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0030] The active magnesium oxide used in the embodiment of the present invention has a citric acid active adsorption value of 15s and a particle size of 1300nm.

[0031] Example 1

[0032] The flame retardant rubber material contains the following components in parts by mass:

[0033] 40 parts of non-sulfur-adjusted chloroprene rubber (the mass content of chlorine in the non-sulfur-adjusted chloroprene rubber is 30%);

[0034] 60 parts of chlorinated polyethylene (the mass content of chlorine in the chlorinated polyethylene is 35%, the tensile strength of the chlorinated polyethylene is 12 MPa, and the elongation at break is 750%);

[0035] 25 parts of aluminum oxide (aluminum oxide particle size is 25nm, specific surface area is 150m 2 / g);

[0036] 30 parts of white carbon black (the specific surface area of ​​white carbon black is 170m 2 / g, the mass content of silicon dioxide in white carbon black is 95%);

[0037] 15 parts of ditolyl phosphate, 22.0 parts of thiourea accelerator NA-22, 5 parts of active magnesium oxide, and 5 parts of zinc oxide.

[0038] Example 2

[0039] The flame retardant rubber material contains the following components in parts by mass:

[0040] 50 parts of non-sulfur-adjusted chloroprene rubber (the mass content of chlorine in non-sulfur-adjusted chloroprene rubber is 35%);

[0041] 50 parts of chlorinated polyethylene (the mass content of chlorine in the chlorinated polyethylene is 33%, the tensile strength of the chlorinated polyethylene is 10 MPa, and the elongation at break is 700%);

[0042] 30 parts of aluminum oxide (aluminum oxide particle size is 20nm, specific surface area is 200m 2 / g);

[0043] 40 parts of white carbon black (the specific surface area of ​​white carbon black is 200m 2 / g, the mass content of silicon dioxide in white carbon black is 98%);

[0044] 20 parts of triphenyl phosphate, 22.2 parts of thiourea accelerator NA-22, 6 parts of active magnesium oxide, and 7 parts of zinc oxide.

[0045] Example 3

[0046] The flame retardant rubber material contains the following components in parts by mass:

[0047] 60 parts of non-sulfur-adjusted chloroprene rubber (the mass content of chlorine in the non-sulfur-adjusted chloroprene rubber is 40%);

[0048] 40 parts of chlorinated polyethylene (the mass content of chlorine in the chlorinated polyethylene is 37%, the tensile strength of the chlorinated polyethylene is 15 MPa, and the elongation at break is 800%);

[0049] 50 parts of aluminum oxide (aluminum oxide particle size is 30nm, specific surface area is 100m 2 / g);

[0050] 40 parts of white carbon black (the specific surface area of ​​white carbon black is 150m 2 / g, the mass content of silicon dioxide in white carbon black is 95%);

[0051] 30 parts of ditolyl phosphate, 22.6 parts of thiourea accelerator NA-22, 8 parts of active magnesium oxide, and 8 parts of zinc oxide.

[0052] Comparative Example 1

[0053] The flame retardant rubber material contains the following components in parts by mass:

[0054] 100 parts of non-sulfur-adjusted chloroprene rubber (the mass content of chlorine in the non-sulfur-adjusted chloroprene rubber is 30%);

[0055] 40 parts of high wear-resistant furnace black N234, 2.5 parts of antioxidant 4010NA, 5 parts of activator zinc oxide, 4 parts of activator magnesium oxide, 2 parts of accelerator stearic acid, 12 parts of plasticizer DOP, 10 parts of plasticizer chlorinated paraffin, and 15 parts of flame retardant antimony trioxide.

[0056] Comparative Example 2

[0057] The flame retardant rubber material contains the following components in parts by mass:

[0058] 40 parts of chlorinated polyethylene (the mass content of chlorine in the chlorinated polyethylene is 35%, the tensile strength of the chlorinated polyethylene is 10 MPa, and the elongation at break is 700%);

[0059] Flame retardant magnesium hydroxide 15 parts, plasticizer trioctyl trimellitate 12 parts, accelerator zinc molybdate 18 parts, vulcanizer thiadiazole 2 parts, plasticizer DOS 25 parts.

[0060] The mechanical properties and flame retardant properties of the flame retardant rubber materials of Examples 1 to 3 and Comparative Examples 1 to 2 were tested respectively. The test results are shown in Table 1.

[0061] The hardness is tested according to GB / T 531.1-2008, the tensile strength and elongation at break are tested according to GB / T 528-2009, the peel strength between flame retardant rubber material and steel plate is tested according to GB / T 7760-2003, and the flame retardant grade is tested according to GB8624-2012.

[0062] The preparation method of the flame-retardant rubber material samples of Examples 1 to 3 is as follows: non-sulfur-adjusted chloroprene rubber is plasticized, and then mixed with chlorinated polyethylene at a speed of 35 r / min for 60 seconds, followed by adding aluminum oxide, white carbon black, and a flame-retardant plasticizer in sequence, and mixing at a speed of 35 r / min for 90 seconds. When the temperature of the mixture drops to 80°C, an accelerator, active magnesium oxide, and zinc oxide are added, and mixing is continued at a speed of 35 r / min for 60 seconds to obtain a flame-retardant rubber material.

[0063] The preparation method of the flame retardant rubber material sample of Comparative Example 1 is as follows: the rubber matrix is ​​plasticized, and then high wear-resistant furnace black N234, plasticizer, flame retardant and antioxidant are added in sequence, and mixed at a speed of 35r / min for 90s. When the material temperature drops to 80°C, the promoter and activator are added, and mixed at a speed of 35r / min for 60s to obtain the flame retardant rubber material.

[0064] The preparation method of the flame retardant rubber material sample of Comparative Example 2 is as follows: the rubber matrix is ​​plasticized, and then the plasticizer and the flame retardant are added in sequence, and mixed at a speed of 35r / min for 90s. When the material temperature drops to 80°C, the accelerator and the vulcanizer are added, and mixed at a speed of 35r / min for 60s to obtain the flame retardant rubber material.

[0065] Table 1 Performance test results of various flame retardant rubber materials

[0066]

[0067] It can be seen from Table 1 that the flame retardant rubber material of the present invention has both excellent strength and flame retardant properties. The flame retardant rubber material of comparative example 1, which is based only on chloroprene rubber, has good strength but low flame retardant properties. The flame retardant rubber material of comparative example 2, which is based on chlorinated polyethylene, has a flame retardant grade of B1 but poor strength and cannot meet the use requirements of seismic isolation rubber bearings.

[0068] Application Example 1

[0069] The flame-retardant rubber material of Example 1 is used to prepare the seismic isolation rubber bearing body. Two layers of porous vacuum silicon material are first coated on the outside of the seismic isolation rubber bearing, each layer of porous vacuum silicon material is 2 mm thick, and then a silicone waterproofing agent with a thickness of 1 mm is applied.

[0070] Application Example 2

[0071] The flame retardant rubber material in Application Example 1 is replaced by the flame retardant rubber material in Example 2, and the rest is the same as in Application Example 1.

[0072] Application Example 3

[0073] The flame retardant rubber material in Application Example 1 is replaced by the flame retardant rubber material in Example 3, and the rest is the same as in Application Example 1.

[0074] The main body of the seismic isolation rubber bearing of the present invention adopts the flame-retardant rubber material of the present invention. In addition, the porous vacuum silicon material has a low thermal conductivity (can reach 0.014W / m·K) and has excellent thermal insulation performance. Compared with traditional fireproof materials such as aluminum silicate wool, it can greatly reduce the amount of materials while achieving the same waterproof level; the silicone waterproofing agent has hydrophobic properties, and under normal use, there will be no problem of flame retardant failure due to water absorption by the fireproof material. The flame-retardant rubber material of the present invention and the double-layer structure of the porous vacuum silicon material + waterproofing agent further improve the flame retardant performance of the seismic isolation rubber bearing.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A flame retardant rubber material, characterized in that: The invention comprises the following components in parts by weight: 40-60 parts of chloroprene rubber, 40-60 parts of chlorinated polyethylene, 20-50 parts of aluminum oxide, 20-40 parts of white carbon black, 10-30 parts of plasticizer, 1.8-3 parts of accelerator, 3-8 parts of magnesium oxide and 5-8 parts of zinc oxide.

2. The flame retardant rubber material according to claim 1, characterized in that: The chloroprene rubber is a non-sulfur-adjusted chloroprene rubber, and the mass content of chlorine in the non-sulfur-adjusted chloroprene rubber is ≥30%.

3. The flame retardant rubber material according to claim 2, characterized in that: The mass content of chlorine in the chlorinated polyethylene is 33-37%, the tensile strength of the chlorinated polyethylene is ≥10MPa, and the elongation at break is ≥700%.

4. The flame retardant rubber material according to claim 2 or 3, characterized in that: The particle size of the aluminum oxide is 20 to 30 nm, and the specific surface area of ​​the aluminum oxide is 100 to 200 m 2 / g.

5. The flame retardant rubber material according to claim 4, characterized in that: The specific surface area of ​​the white carbon black is 150 to 200 m 2 / g, the mass content of silicon dioxide in white carbon black is ≥95%.

6. The flame retardant rubber material according to claim 5, characterized in that: The plasticizer is a flame retardant plasticizer, and the accelerator is a thiourea accelerator.

7. A seismic isolation rubber bearing comprising the flame retardant rubber material according to any one of claims 1 to 6, characterized in that: The rubber material used for the body of the seismic isolation rubber bearing is the flame-retardant rubber material. The outer side of the seismic isolation rubber bearing is wrapped with an aerogel material, and the outer side of the aerogel material is coated with a waterproofing agent.

8. The seismic isolation rubber bearing according to claim 7, characterized in that: The aerogel material is porous vacuum silicon, the number of the wrapped layers of the porous vacuum silicon is 1 to 3 layers, and the thickness of each layer of the porous vacuum silicon is 1 to 4 mm.

9. The seismic isolation rubber bearing according to claim 8, characterized in that: The waterproofing agent is an organic silicon waterproofing agent or a hydrophobic coating, and the thickness of the waterproofing agent is 0.1 to 2 mm.

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