High-hardness polyurethane elastomer pressure-bearing support material for bridge and preparation method and using method thereof
A polyurethane elastomer and high hardness technology, which is applied in the field of polyurethane elastomer pressure-bearing bearing materials for bridges and its preparation, can solve the problems of intensifying cross-linking side reactions, speeding up the reaction speed, and losing the main chain reaction, so as to reduce the use of Quantity, reduce the frequency of replacement, improve the effect of bearing capacity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Component A: Dehydrate 400gPPG (number average molecular weight: 2000) at 100-110°C for 2h under a vacuum of 0.1MPa, cool down to 50°C, add 112gIPDI, react at 80-85°C for 2h under nitrogen protection, and cool down to 60°C Then add 20g of butanediol, 20g of dipropylene glycol and 157g of toluene diisocyanate T-80 and continue the reaction at 80-85°C for 2h to obtain a prepolymer component.
[0029] Component B: Dimethylthiotoluenediamine
[0030] Preparation of the pressure-bearing support: Add 0.62 g of additives compounded by antioxidant 1010 / ultraviolet absorber 328 / light stabilizer 292 / polyphosphite to components A and B at a mass ratio of 100 / 24.2 After mixing, degas and extend the chain, and cast the pressure bearing and the sample. The pressure-bearing support can be used after being placed for 7 days. The performance test results of the sample are shown in Table 2.
Embodiment 2
[0032] Component A: After dehydrating 400gPPG (number average molecular weight 1000) at 100-110°C for 2h under a vacuum of 0.1MPa, cool down to 50°C and add 200g of HMDI, react at 80-85°C for 2h under nitrogen protection, then cool down to 60°C and then Add 50g of diethylene glycol and 200g of toluene diisocyanate T-100 and continue the reaction at 80-85°C for 2h to obtain a prepolymer component.
[0033] Component B: a mixture of di-o-chloroanilinomethane and dimethylthiotoluenediamine in a molar ratio of 2:1.
[0034] Preparation of pressure bearings: Add 0.64g of additives compounded by antioxidant 245 / UV101 / light stabilizer 292 / polyphosphite to component A and component B at a mass ratio of 100 / 28.2 After mixing and degassing, cast pressure bearings and samples. The pressure-bearing support can be used after being placed for 7 days. The performance test results of the sample are shown in Table 2.
Embodiment 3
[0036]Component A: After dehydrating 400gPTMG (number average molecular weight 1000) for 2h under vacuum degree of 0.1MPa, cool down to 50°C and add 150gHDI, react at 80~85°C for 2h under the protection of nitrogen, cool down to 60°C, then add 55g of diethylene glycol Alcohol and 250g toluene diisocyanate T-100 continue to react at 80-85°C for 2h to obtain prepolymer components.
[0037] Component B: a mixture of di-o-chloroanilinomethane and dimethylthiotoluenediamine in a molar ratio of 1:1.
[0038] Preparation of the pressure bearing: the mass ratio of component A and component B is 100 / 27.2, and 0.63g is compounded by antioxidant 1076 / ultraviolet absorber 329 / light stabilizer 292 / polyphosphite The additives are mixed and degassed to extend the chain, and the pressure-bearing support and the sample are cast. The pressure-bearing support can be used after being placed for 7 days. The performance test results of the sample are shown in Table 2.
PUM
| Property | Measurement | Unit |
|---|---|---|
| tensile strength at break | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More