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Application of Low Atomization and Low Volatility Catalyst in MDI based and TDI based Molded foam

2022-12-09 Reading Times:

For a long time, automobile manufacturers have put the improvement of interior comfort in a very important position.

Now, the environment inside the car body, especially the smell and smoke inside the car body, is listed as a new standard for judging comfort. Therefore, in the automobile production, the odor caused by the volatilization and atomization of amine in the cushion foam is being strictly reviewed by the manufacturer.

In conclusion, the reaction can be optimized by adjusting the ratio of gel catalyst and foaming catalyst and selecting the degree of delay. In MDI system, gel catalyst EF-602 showed moderate gel ability. When only EF-602 is used as catalyst, it has strong gel ability and slight foaming ability. Foaming catalyst EF-

708 and EF-705 have strong foaming ability and good opening ability. The tapping ability of EF-705 is good.

Although the new catalyst has a strong retarding effect, it can be seen from the test results of thermal cavitation load in Table 1 that its curing performance is also quite good: the data in the table is measured after demoulding and holding for a certain time, which is an indicator of the degree of polymer curing. Even if the delay time is long, the curing degree is still equivalent to that of the reference catalyst. As one of the functions of catalyst, pore opening is also very important. EF602 and EF-705 are particularly suitable for foam formulations with high porosity. Compared with the reference formula, the foam of formula 3 has stronger delaying effect, better opening performance and equivalent curing degree. Formula 1 uses two catalysts at the same time, which produces very good curing effect in the production of foam. At the same time, foam has micro closed pores, with a longer duration, and a shorter cycle is more conducive to production. Formula 2 is between Formula 1 and Formula 3, and its performance test results are also between Formula 1 and Formula 3. The test results show that the combination of EF-602, EF-705 and EF-708 in the formula can easily obtain molded foam with excellent performance.

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