4results about How to "Good toughness" patented technology

The invention provides a preparation method of a metal lithium powder composite electrode containing a BIMSM binder, and the method comprises the following steps: S1, dissolving a brominated isobutylene-p-methylstyrene copolymer in a first organic solvent to obtain a pre-coating solution; s2, in an inert atmosphere, adding metal lithium powder into the pre-coating solution for dispersing and mixing, and then removing the solvent and drying to obtain modified metal lithium powder coated with a BIMSM layer on the surface; s3, dispersing the modified metal lithium powder, butadiene styrene rubber, a conductive agent and a cross-linking agent in a second organic solvent, and uniformly mixing to obtain electrode slurry; and S4, coating the surface of a current collector with the electrode slurry, heating, drying and rolling to obtain the metal lithium powder composite electrode. The metal lithium powder composite electrode prepared by the invention effectively inhibits volume expansion and dendritic crystal growth of metal lithium, and the cycle life and coulombic efficiency of the battery are remarkably improved.

This invention belongs to the field of epoxy resins, specifically relating to toughening agent particles with a core-shell structure and a low-temperature impact-resistant epoxy resin composition. The toughening agent particles with a core-shell structure comprise a core of TPU nanoparticles and a shell of liquid crystal epoxy molecules grafted onto the TPU nanoparticles. Polyether-type TPU exhibits good low-temperature flexibility, and by grafting liquid crystal epoxy molecules, both the toughening effect and compatibility with the epoxy resin substrate are improved. The low-temperature impact-resistant epoxy resin composition comprises epoxy resin, toughening agent particles, and a composite accelerator system. By adding toughening agent particles, the notched impact strength at -40°C is increased by more than 60%.

The present application relates to modified copolyester material, disclose a kind of modified polyester and its preparation method and application.Modified polyester is less than or equal to 130 ℃, modified polyester and polyvinyl chloride are melt-mixed to form composite particles with weight ratio 1:0.5-2, then with toughening agent is co-extrusion mixed to be made into the composite board material with thickness 1-2cm with weight ratio 1:0.1-0.15, the impact resistance of composite board material is 390kg / mm above.Modified polyester preparation method includes: under esterification reaction condition, after modified monomer, dibasic acid monomer, dibasic alcohol monomer and catalyst are mixed, first stage reaction is carried out;Under polycondensation reaction condition, second stage reaction is carried out, modified monomer contains polyhydric alcohol with formula (I) shown structure and monomer with formula (II) shown structure, and the molar ratio of monomer with formula (II) shown structure and dibasic acid monomer is 0.4-1.5:1.Modified polyester melting point is low, and the compatibility with polyvinyl chloride is good, and the composite material formed by melt-mixing of the two has excellent strength, toughness and cold resistance.

The application discloses a kind of copolymer modified polyester and its preparation method, belong to polyester field.The method uses glycerol or dimer glycerol as copolymer tri-monomer, synthesizes glycerol modified polyethylene isophthalate, and the melting point of the modified polyester can reach about 110 DEG C.This kind of low melting point copolymer with certain crosslinking molecular chain can be co-extruded with toughening modifier polybutylene adipate in screw extruder, and the plate material with thickness of more than 1cm is extruded by mixing, has excellent toughness and impact resistance, and is used for producing shoe front and rear cover material.