Catalyst system for preparing polyether materials for aviation

Abstract

The invention provides a boron alkyl-halogenated onium salt system and an application thereof in living polymerization of epoxy monomers and belongs to the field of an epoxy resin. An epoxy monomer active anion controllable polymerization reaction system provided by the invention contains an initiator, a catalyst, a solvent and epoxy monomers, wherein the halogenated quaternary ammonium salt or halogenated quaternary phosphor salt is taken as the initiator and the boron alkyl is taken as the catalyst. The epoxy monomer polymerization system provided by the invention is capable of efficiently triggering the epoxy monomer controllable anionic polymerization reaction under the conditions of shorter period and room temperature. An epoxypropane / ethane polymer prepared according to the system provided by the invention can be applied to the additives of aviation chemical products.

Description

technical field [0001] The invention belongs to the field of epoxy resins, and in particular relates to the application of an alkyl boron-halogenonium salt system in the polymerization of epoxy monomers. Background technique [0002] In view of the sensitivity of the aircraft to weight and the need to meet its own performance, it is becoming increasingly urgent to reduce its own weight as much as possible under the premise of safety. Reducing the weight of the aircraft can improve fuel efficiency, extend the flight mileage of the aircraft or increase the payload of the aircraft. The specific gravity of polymer materials is light, and the use of polymer materials in aircraft interiors can greatly reduce the weight of aircraft. Polyurethane is a widely used material in aviation polymer materials (see Pan Jinjin, Civil Aircraft Interior Materials Research. Equipment Manufacturing Technology, 2014.8.237-238.), his application in the aviation field includes polyurethane foam mat...

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Problems solved by technology

Document HUANG YJ, Controlled ring-opening polymerization of propylene oxide catalyzed by double metal-cyanide complex [J]. , a dicyano catalytic system Zn 3 [Co(CN) 6 ] 2 It is widely used in the production of polyether compounds, but such products have transition metal and cyanide residues, which limit the scope of application of their products

[0005] GOETHALS E J. The formation of cyclic oligomers in the cationic polymerization of heterocycles [J]. Adv. Polym. Sci., 1977, (23): 103-130. It is pointed out that the strong Lewis acidic boron catalyst can trigger the cation opening of propylene oxide Ring polymerization, but there is a "biting reaction" of active growing chains in the polymerization process, so that the prepared propylene oxide polymers are mostly low-molecular-weight cyclic oligomers, which cannot meet the application requirements in the aviation field

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