Preparation method of polyurethane foam stabilizer

Abstract

The invention discloses a preparation method of a polyurethane foam stabilizer. The method comprises the following steps: (1) reacting allyl alcohol with oxirane and epoxypropane with an effect of a basic catalyst under conditions of a temperature of 90 to 130 DEG C and a pressure of not more than 0.5 MPa to obtain allyl-terminated copolyether; (2) reacting octamethylcyclotetrasiloxane with hexamethyldisiloxane and high hydrogenous silicone oil with a hydrogen content of 1.2% to 5% in the presence of an acidic ion exchanger under the condition of the temperature of 30 to 80 DEG C to obtain low hydrogenous silicone oil with the hydrogen content of 0.1% to 1%; and (3) adding the allyl-terminated copolyether obtained in step (1), the low hydrogenous silicone oil obtained in step (2), the catalyst and 1 to 5 wt% of amine ether to a reaction kettle under the conditions of the reaction temperature of 80 to 120 DEG C and the reaction pressure of 0.5 to 2 atm to obtain the polyurethane foam stabilizer. Compared with the prior art, the method of the present invention has the advantages of less pollution and cost reduction.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane foam stabilizer. Background technique [0002] Polyurethane foam is a high-performance structural material developed in the 1950s and 1960s. It has the characteristics of porous, low density, and high specific strength. It can be divided into rigid foam, soft foam, and semi-rigid foam according to its mechanical strength. . Due to the wide range of uses of polyurethane foam and its rapid development, its output has been growing at a double-digit rate in my country in recent years. [0003] Foam stabilizer is one of the key components in the production formula of polyurethane foam, and its functions in the production process of polyurethane foam, such as emulsification, nucleation, foam stabilization and material fluidity, are mutually restricted. For example, when the foam stabilizer reduces the surface tension of the polyurethane foam system a lot, the emulsification and fluidity of the...

AI Technical Summary

Problems solved by technology

But the preparation method of this foam stabilizer has the following problems: (1) because the method must use volatile and flammable organic solvents, this type of solvent must be separated from the product in the later stage of the reaction, which increases the reaction operation steps and production costs, and The waste solvent produced will also cause great pollution to the environment and reduce the safety of production operations; (2) Lewis acids such as sulfuric acid are used as catalysts in the reaction process of this method, and the salts produced by neutralizing the Lewis acids need to be filtered Removed, increased reaction operation steps and production costs

Images