Surfactant used in preparation of slow rebound polyurethane foam and preparation technology of surfactant
A surfactant and polyurethane foam technology, applied in the field of surfactants in the field of fine chemicals, can solve the problems of poor slow rebound performance, uneven cell structure, poor foam feel, etc., to achieve good stability of foam, uniformity Fine cell structure, the effect of improving cell structure
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[0032] (1) Synthesis of propylene oxide and propylene oxide copolyether with allyl as the end group: add 1 to 10 parts by weight of allyl alcohol, 20 to 45 parts by weight of ethylene oxide and 50 ~70 parts by weight of propylene oxide, under the action of 0.1~0.5 parts by weight of basic catalyst, controlled reaction temperature 90°C~130°C, reaction pressure not greater than 0.5MPa, reacted for 4~6 hours, when the system pressure When the temperature is lowered to less than 0.15MPa, the temperature is lowered to stop the reaction. After neutralization, filtration and extraction, a ethylene oxide and propylene oxide containing allyl alcohol is obtained, with an allyl group at one end and a hydroxyl group at the other end. The polyether of the random copolymerization structure of the group.
[0033] Three polyether samples were synthesized according to this process, and the typical parameters of their molecular structures are as follows:
[0034] Table 1: Sample list of allyl-...
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