10 results about "Polyhydroxy compound" patented technology

The application discloses a kind of sulphur-containing polydopamine melanin nanoparticles and preparation method and application, preparation raw materials include polyhydroxy compound and sulphur-containing compound, the weight ratio of the polyhydroxy compound and the sulphur-containing compound is (1-100) :(1-100), the preparation raw materials also include water, organic solvent and acid-base regulator.The application occurs self-polymerization reaction under alkaline condition with dopamine and sulphur-containing compound, without additional crosslinking agent and oxidant, and the nanoparticles obtained have excellent photothermal performance.In photothermal therapy, biomedical imaging, water purification, functional coating and other aspects, it shows great application potential.And preparation reaction condition is mild, without additional catalyst and oxidant, process is safe, post-processing is simple, and no harmful waste water and waste residue to environment, meet the requirements of green chemistry.

The present invention relates to the technical field of concrete materials. Disclosed are a modified epoxy resin and a preparation method therefor, a composition for an epoxy resin grouting material, an epoxy resin grouting material, a preparation method therefor, and a use thereof. The method for preparing the modified epoxy resin comprises: heating a polyhydroxy compound and an epoxy resin at 80-100ºC in a nitrogen atmosphere in the presence of a catalyst to obtain the modified epoxy resin, wherein the molar ratio of the polyhydroxy compound, the epoxy resin, and the catalyst is 1:1-2:0.05-0.1; the epoxy resin is a bisphenol A epoxy resin; the catalyst is selected from any one of sodium hydroxide, potassium carbonate, and dimethylaniline; and the polyhydroxy compound is selected from at least one of glycerol, ethylene glycol, propylene glycol, glucose, and butylene glycol. The epoxy resin grouting material of the present invention has more excellent toughness and lower viscosity, and good bonding strength and bonding durability with a concrete matrix.

This application belongs to the field of display technology and relates to a composition, ink, thin film, light-emitting device, and display apparatus. The composition comprises a polyhydroxy compound and a first metal oxide, wherein the polyhydroxy compounds are interconnected by hydrogen bonds, and the first metal oxide is coordinated with the polyhydroxy compounds. The polyhydroxy compounds can passivate surface defects of the first metal oxide, improving its conductivity, and, after coordination with the first metal oxide, can prevent uneven diffusion of the first metal oxide.

This application relates to a blocked isocyanate prepolymer system, its preparation method, and its applications. The blocked isocyanate prepolymer system is prepared by reacting an isocyanate having two or more isocyanate groups sequentially with a blocking agent and a polyhydroxy compound. The blocked isocyanate prepolymer system of this invention can be processed into various products, has a wide range of applications, and exhibits low viscosity even without solvent dilution, which is beneficial for subsequent use.

This invention relates to the field of building materials and concrete admixtures, and particularly to a hydration temperature rise inhibitor, its preparation method, and its application. The hydration temperature rise inhibitor of this invention employs a host-guest supramolecular assembly strategy, using calixarene as the host and polyhydroxy compounds as the guest, constructing a capsule-like composite structure through hydrogen bonding. During cement hydration, calixarene is first adsorbed onto the surface of cement particles, delaying the nucleation and growth stages of cement hydration through interfacial adsorption. Subsequently, the calixarene gradually dissolves and continuously releases polyhydroxy compounds, allowing them to enter the aqueous phase. The released polyhydroxy compounds further effectively inhibit the interfacial reaction process of cement hydration, thereby slowing down the hydration heat release rate, reducing the hydration temperature peak, and achieving regulation of the early hydration temperature rise of cement. The hydration temperature rise inhibitor has wide applicability, significantly reducing the risk of concrete cracking caused by temperature drop shrinkage, and effectively improving the durability and long-term safety of engineering structures.

The present application relates to the field of ethylene glycol preparation, and discloses a method for preparing ethylene glycol. The method comprises the following steps: in the presence of water, a polyhydroxy compound and hydrogen are reacted with a catalyst; the catalyst comprises a metal / COFs material and a tungsten-containing compound; wherein the COFs material in the metal / COFs material is selected from at least one of nitrogen-containing organic framework materials; and the metal in the metal / COFs material is selected from at least one of noble metal elements and nickel elements. The method for preparing ethylene glycol has high ethylene glycol selectivity and yield; and the catalyst used in the method has good cycle stability.

This invention relates to the field of electrochemistry, specifically disclosing a method for the selective electrooxidation of polyhydroxy compounds. More specifically, it involves the selective electrooxidation of compound (Ⅰ) to obtain compound (Ⅱ). This invention reduces the large number of byproducts caused by the simultaneous oxidation of multiple pairs of hydroxyl groups in traditional oxidation methods. By selectively electrooxidizing to obtain compound (Ⅱ), and then reducing compound (Ⅱ) to obtain compound (Ⅲ), for example, selectively electrooxidizing hydroxycitronellol (3,7-dimethyl-1,7-octanediol, compound 1a) to obtain (7-hydroxy-3,7-dimethyloctanoic acid, compound 2b), and then reducing it with compound 1b to obtain compound 1c. Compound 1c is hydroxycitronellol (CAS: 107-75-5), which has a strong floral fragrance. By changing the number of carbon atoms in hydroxycitronellol without changing the functional groups, a series of small molecule compounds with different fragrances can be produced efficiently and with low pollution.

This invention discloses a method for preparing and applying a polymer-type demulsifier, belonging to the field of petroleum extraction and crude oil dehydration technology. The preparation of the branched self-healing polyether polymer includes: using a polyhydroxy compound as a starting agent, sequentially performing ring-opening polymerization with propylene oxide and ethylene oxide to prepare a star-shaped amphiphilic polyether prepolymer; preparing a dihydroxy chain extender containing Diels-Alder bonds; and performing branching, chain extension, and self-assembly crosslinking of the prepolymer and the dihydroxy chain extender containing DA bonds under the action of a coupling agent to obtain the branched self-healing polyether polymer. The polymer is then mixed with a solvent to prepare a polymer-type demulsifier. This invention introduces the DA self-healing mechanism into the polyether demulsifier system for the first time. The resulting demulsifier possesses both a highly branched structure and thermally reversible self-healing function, and can restore its molecular structure after shear damage. It exhibits excellent and long-lasting demulsification and dehydration effects on crude oil emulsions, and is particularly suitable for high-shear gathering and transportation environments and difficult-to-demulsify systems.

This application relates to a water-dispersible blocked isocyanate prepolymer system, its preparation method, and its applications. The blocked isocyanate prepolymer system is prepared by reacting an isocyanate having two or more isocyanate groups, a blocking agent, a non-hydrophilic polyhydroxy compound, and an active hydrogen compound containing hydrophilic groups. The blocked isocyanate prepolymer system of this invention is water-dispersible, can be processed into various products, and has a wide range of applications.

The present disclosure relates to a composition that increases the hardness of concrete surface and methods for producing and using the same. In particular, the composition of the disclosure is a solution comprising a solvent and calcium compound, wherein the solvent comprises a polyhydroxy compound, water, and optionally ethanol.