Epoxidized SBS, blocked macromolecular active amine toughening agent, preparation and application thereof to epoxy resin

Abstract

The invention belongs to the technical field of an epoxy resin toughening agent, and discloses epoxidized SBS, a blocked macromolecular active amine toughening agent, preparation and application thereof to epoxy resin. A preparation method of the epoxidized SBS comprises the following steps of (1) performing heating reaction on hydrogen peroxide and tungstic acid; then, mixing the materials with phosphoric acid; dripping chloridized quaternary ammonium salt; obtaining a catalyst; (2) using hydrogen peroxide as an oxygen source; performing catalytic oxidation on the SBS under the catalyst effect to obtain the epoxidized SBS. The preparation method of the toughening agent comprises the step of performing ring opening reaction on the epoxidized SBS and aminoethylpiperazine under the catalysteffect in the organic solvent to obtain a product. The catalysis activity of the catalyst is high; no side reaction exists; during the SBS epoxidation, the method is simple; the conditions are mild; the control is easy; the yield is high; the epoxidation product cannot easily gel; the product can be easily purified; the catalyst can be easily recovered. The toughening agent has the obvious toughening effect on the epoxy resin; in addition, the transparency of the epoxy resin cannot be influenced.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin toughening, and relates to an epoxidized SBS, a block macromolecule active amine toughening agent, a preparation method thereof and the application of the toughening agent in epoxy resin. Background technique [0002] Epoxy resin refers to a polymer compound containing two or more epoxy groups in the molecule, with aliphatic, alicyclic or aromatic chain segments as the skeleton. Under appropriate curing conditions, such as amines, Imidazoles, acid anhydrides, or phenolic resins, etc., are polymers that can form a cured product of a three-dimensional crosslinked network. Epoxy resin has the characteristics of excellent physical and mechanical properties, electrical insulation properties, chemical corrosion resistance, adhesive properties and flexible processability, and is widely used in various industries such as light industry, machinery, aerospace, national defense, construction and coatings...

AI Technical Summary

Problems solved by technology

Patent (CN 103396536 A) adopts the method synthetic toughening agent of polyester polyol, and applies it to epoxy resin and acid anhydride curing system, improves the flexibility of epoxy resin, but the hydroxyl and ring in polyester polyol Oxygen resin has low reactivity, and the color of the product is brown, which is not conducive to wide application

The patent (CN 104725782A) adopts a combination of one or more of carboxylated nitrile elastic nanoparticles, nitrile elastic nanoparticles, carboxylated styrene-butadiene elastic nanoparticles, and styrene-butadiene elastic nanoparticles to toughen and modify epoxy resin. impact strength while losing flexural strength and flexural modulus

The patent application (CN 107698733 A) uses synthetic polyurethane to modify epoxy resin, which usually uses polyurethane and epoxy resin to form an interpenetrating network polymer to increase the toughness of the system, but generally loses the elastic modulus of the material and modifies darker in color

Literature [(Guo Qipeng, Wang Ke, Chen Ling, et al. Phase behavior, crystallization, and nanostructures in thermoset blends of epoxy resin and amphiphilic star-shaped block copolymers [J]. Journal of Polymer Science: Part B. Polymer Physics, 2006, 44 (6): 975-985)] discloses a kind of toughening epoxy resin, and it utilizes the characteristic that polypropylene oxide (PPO) and polyethylene oxide (PEO) dissolve with epoxy resin, selects both blocks The polyether toughened epoxy resin formed by copolymerization also shows a good toughening effect because the polyether precipitates out to form a dispersed phase during the curing process of the resin, but the modified product has not yet formed a chemical bond with the epoxy resin substrate. It is only combined with the epoxy resin substrate by secondary valent bonds, so the toughening effect is limited

Patent application (CN 107383366 A) prepared polyamide curing agent to cure epoxy resin, usually this type of curing agent is also an effective method to improve the toughness of epoxy resin, but the color of the cured product is too dark, not suitable for wide application

Images