6results about How to "Promotes microphase separation" patented technology

This invention relates to the field of polymer technology, specifically disclosing an oxyfluorene-containing polyaryl suspended side-chain anion exchange polymer. By introducing an oxyfluorene structure, this invention successfully overcomes the defects of traditional polyaryl ether materials, such as easy main chain breakage and degradation under strong alkaline conditions, thus improving the chemical and thermal stability of the material. The suspension side-chain strategy introduces benzene rings, quaternary ammonium groups, or piperidine cationic groups, effectively promoting microphase separation within the polymer and constructing efficient ion transport channels. This allows the membrane material to maintain a low swelling ratio while achieving good hydroxide ion conductivity, reaching up to 170.2 mS / cm at 80°C. The polymer exhibits excellent mechanical properties, with outstanding dry membrane tensile strength and excellent alkali resistance and durability. After immersion in a strong alkaline (KOH) solution at 80°C for over 1800 hours, its conductivity loss is minimal. The anion exchange membrane prepared by this invention has good application value in fuel cells and water electrolysis for hydrogen production, demonstrating strong commercial potential.

The application discloses an end hexaazido nitrate polyether adhesive and a synthesis method thereof. The method first takes triazido neopentyl alcohol and glycidyl ether nitrate as raw materials, boron trifluoride-ether complex as a catalyst, and obtains triazido neopentyl polyglycidyl ether nitrate alcohol through cation ring-opening polymerization reaction; then takes triazido neopentyl polyglycidyl ether nitrate alcohol and hexamethylene diisocyanate as raw materials, dibutyl tin dilaurylate as a catalyst, and obtains end hexaazido polyglycidyl ether nitrate through addition reaction, namely the end hexaazido nitrate polyether adhesive. The application is mainly used for solid propellants, is used for synthesizing polytriazole elastomers, improves the content and crosslinking density of hard segments, promotes microphase separation of the elastomers, and thus improves mechanical properties.

The invention relates to the technical field of cross-linking agents, in particular to a special cross-linking agent for soft polyurethane foam, which comprises the following components in percentage by mass: 1-85% of alkyl glycoside compound, 1-5% of polyoxyethylene propylene ether compound, 1-5% of urea derivative, 1-5% of stabilizer of urea derivative and the balance of solvent. The polyoxyethylene propylene ether compound accounts for 1-40% of the cross-linking agent; the urea derivative accounts for 1-25% of the cross-linking agent; the stabilizer accounts for 0.01 to 1 percent of the cross-linking agent; and the solvent accounts for 1-40% of the cross-linking agent. When the cross-linking agent adopting the formula is used in the production process of polyurethane foam, rapid cross-linking curing in the early stage of foaming can be helped, foam opening is promoted, the problem of cold deformation bulging of high resilience of large foam blocks is solved, meanwhile, the use amount of diethanol amine is reduced, and the hardness problem of soft foam caused by diethanol amine can be solved.

The invention relates to the technical field of polyurethane, and particularly discloses a high-performance composite polyurethane plastic comprehensive material and a preparation method thereof. Comprising a polyurethane component and a polyurea component, the weight of the polyurethane component accounts for 50-90% of the total weight of the comprehensive material, the polyurethane component is formed by compounding a material A and a material B, the material A is a polyurethane prepolymer, the NCO value of the polyurethane prepolymer is 4-12%, and the material B comprises polyether polyol, a catalyst, an antioxidant, an anti-ultraviolet agent and a filler; and the polyurea component comprises a polyurea prepolymer with the NCO value of 13 to 15 percent. The high-performance composite polyurethane plastic comprehensive material provided by the invention can overcome the limitation of inherent properties of isocyanate groups and hydroxyl groups, realizes higher tensile strength, and can fully meet high-end requirements.

The present application relates to the technical field of coating compositions, and discloses a Janus structure marine antifouling and anticorrosion polyurethane coating and a preparation method thereof, the preparation method of the Janus structure marine antifouling and anticorrosion polyurethane coating comprises the following steps: preparing an amphoteric ionic functional monomer; taking a functional glycol, a diisocyanate, an organic bismuth catalyst, the amphoteric ionic functional monomer and a pyridine functional monomer as raw materials, reacting to obtain a functional polyurethane slurry; coating the functional polyurethane slurry on the surface of a metal substrate, curing, and immersing in artificial simulated seawater to obtain the Janus structure marine antifouling and anticorrosion polyurethane coating; the coating has the characteristics of simple preparation, stable properties and multifunctional integration, and can be adapted to various metal substrates.