82 results about "Poly(propylene oxide)" patented technology

Polymers which comprise polymer chains of terpolymer type which are constituted by poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) of PEO-PPO-PEO form, which are modified at their termini by groups which can essentially be other chains of PEO-PPO-PEO, acid segments, amine groups or PEOs, these chains being linked to the terpolymer chains via chemical bridges which are constituted by urethane bridges, urea bridges, allophanate bridges and biuret bridges, and which comprise more than 80% by weight of said PEO-PPO-PEO. Thermoreversible physical gels of high viscosification index, which contain these polymers, and their uses. Preparation of these polymers and of these gels.

The invention relates to a fast-demoulding casting type PU elastomer compound; two component systems are adopted; one is a prepolymer component; vulcabond is reacted with polylol for obtaining a prepolymer with NCO percent is equal to 9 to 15 percent (weight); polypropylene oxide ether polylol with molecular weight of 1000 to 3000 and a functionality of 2 to 3 is adopted as the polylol; the second is a polymer component which consists of the polypropylene oxide ether polylol with a molecular weight of 1000 to 3000 and a functionality of 2 to 3, an aromatic diamine firming agent and a catalyst. The prepolymer component and the polymer component are mixed according to a weight ratio of 1: 1, cast, vulcanized and shaped; a product can be demoulded in ten minutes without post-vulcanization, thus obtaining the fast-demoulding casting type PU elastomer with a product rigidity of shoreA80 to 97 and excellent mechanical properties. The fast-demoulding casting type PU elastomer compound is mainly used for manufacturing the products of PU elastomer such as polyurethane rubber wheel, polyurethane plank stuff and rubber roller, etc.

A process for producing resilient, flexible polyurethane foams that function well in noise and vibration absorption applications for vehicle applications that are made from a blend of polyols (i) and an isocyanate (ii), wherein the blend of polyols (i) comprises a mixture of polyether polyols (i.a) that each has a hydroxyl equivalent weight of from 1200 to 3000 and at least 70% primary hydroxyl groups, from 5 to 80% by weight of the ethylene oxide-capped polypropylene oxides are nominally difunctional, from 0.5 to 20% by weight of the ethylene oxide-capped polypropylene oxides have a nominal functionality of four or higher, and the balance of the ethylene oxide-capped polypropylene oxides, but not less than 1.5% by weight thereof, are nominally trifunctional; an autocatalytic polyol (i.b) having a functionality in the range of 2 to 8 and a hydroxyl number in the range of 15 to 200, wherein said autocatalytic polyol compound comprising at least one tertiary amine group; and a low unsaturation polyol (i.c) having a functionality equal to or greater than 2, a hydroxyl equivalent weight of from 1800 to 2800, and a total unsaturation value of equal to or less than 0.06 meq/g.

The invention relates to a flame-retardant rigid polyurethane foaming plastic composite material and a preparation method thereof. The flame-retardant rigid polyurethane foaming plastic composite material is prepared from the following raw materials in parts by weight: 27-40 parts of modified nanometer magnesium hydrate, 10-13 parts of microencapsulation red phosphorus, 30-50 parts of polypropylene oxide, 30-45 parts of isocyanate, 5-15 parts of foaming agent and 0.5-2 parts of dibutyltin dilaurate. Through synergism of the inorganic particle nanometer magnesium hydrate and the microencapsulation red phosphorus, the flame resistance of the composite material is improved, the oxygen index of the composite material is improved to 31%, the horizontal firing level of the composite material reaches HB40, and the vertical firing level of the composite material reaches V-0.

The invention discloses a method for preparing cross-linked anti-fatigue and anti-wear polyurethane rubber. The cross-linked anti-fatigue and anti-wear polyurethane rubber comprises the following components in percentage by mass: 65-70% of polytetramethylene glycol, 6-10% of cyclic polypropylene oxide ether triatomic alcohol, 14-20% of toluene diisocyanate, 5-8% of 1,5-naphthalene diisocyanate, 1-3% of di-o-chlorodiphenylamine methane, 0.5-1.5% of trimethylolpropane, 0-0.5% of carbon black and 1-2% of molybdenum disulfide. The rubber has the advantages of high wear resistance, good resilience, good low-temperature resistance, high tensile strength, predominant hydrolysis resistance, good adhesion to metal, shock resistance and relatively good anti-fatigue performance.

The invention relates to an ultralow-hardness polyurethane elastomer which comprises three components: a component A is diphenylmethane diisocyanate or a prepolymer thereof, wherein the prepolymer is formed by polymerizing the diphenylmethane diisocyanate and a modifier thereof with polypropylene oxide ether polyol with the functionality of 2-3 and the number-average molecular weight of 1000-8000; a component B consists of polymer polyol, a catalyst and an antiaging agent; and a component C is polymer linear monoalcohol with the number-average molecular weight of 1000-4000. When the component A is the prepolymer, the mass ratio of the component A to the component B is 1:(0.8-1.3). When the component A is the diphenylmethane diisocyanate, the mass ratio of the component A to the component B is 1:(19-27). The mass ratio of the component B to the component C is 1:(0-0.3). The invention also provides a preparation method of the ultralow-hardness polyurethane elastomer material, which is simple to formulate and easy for manufacturing; and the obtained product is environment-friendly and safe, has favorable buffering performance and compression resisting performance, the Shore hardness ranging between 0 and 15, and smooth surface or extremely low viscosity, and is used for manufacturing shoe products for buffering, resisting wearing, and the like.

Disclosed is a method for preparing silica gel with dual-mode pore size distribution by taking an inorganic silicate and an inorganic acid as raw materials and through two stages of gel reaction. In the first stage, silica gel with the pore size distribution of between 50 angstroms and 500 angstroms is prepared by adopting a sol-gel process and adjusting the pH value, the reaction temperature and the aging time; and in the second stage, the second-stage silica gel pore size is adjusted and controlled by adding polyethylene oxide or polypropylene oxide as a template reagent, the second-stage pore size distribution is between 20 angstroms and 150 angstroms, and the silica gel carrier having a difference between the average pore sizes of the two stages being greater than 50 angstroms is prepared. A catalyst prepared from the obtained carrier is polymerized to obtain an olefin polymer with wide molecular weight distribution.

The invention discloses a copper electroplating additive and a preparation method of the copper electroplating additive. The copper electroplating additive is prepared from, by weight, 5-10kg of 50% sulfuric acid, 1-5kg of copper sulfate, 1-6kg of bis-(sodium sulfopropyl)-disulfide, 1-6kg of propane pyridinium sulfonate salt, 1-5kg of alkyl dimethyl ammonium chloride and sulfur dioxide polymerizedquaternary ammonium salt, 80-150kg of polyoxycyclohexane-polypropylene oxide monobutyl ether and 1-8kg of PEG. The preparation method comprises the specific steps that 1.1, about 85 L of pure water is added, and stirring is started; 1.2, sulfuric acid is added and stirred till being completely dissolved; 1.3, copper sulfate is added and stirred till being completely dissolved; 1.4, bis-(sodium sulfopropyl)-disulfide is added and stirred till being completely dissolved; 1.5, propane pyridinium sulfonate salt is added and stirred till being completely dissolved; 1.6, alkyl dimethyl ammonium chloride and sulfur dioxide polymerized quaternary ammonium salt are added and stirred till being completely dissolved; 1.7, polyoxycyclohexane-polypropylene oxide monobutyl ether is added and stirred till being completely dissolved; and 1.8, PEG8000 is added and stirred till being completely dissolved. Brightness of an electroplated copper layer can be ensured, plate burning is prevented, anode slime is reduced, and the electroplating Tp value is high.

The invention relates to an ultrahigh-hardness transparent two-component aliphatic polyurethane coating and a preparation method thereof, the ultrahigh-hardness transparent two-component aliphatic polyurethane coating comprises a polyol component and an isocyanate prepolymer, the polyol component comprises the following raw materials by weight: 20-55% of polyester polyol and/or polyether polyol, 40-55% of a first chain extender, 0.2-2% of an organic metal catalyst, and 0.5-3% of an anti-ultraviolet aging agent; 1-4% of an anti-hydrolysis agent; the polyester polyol is one or more of adipic acid polyesters with the hydroxyl value of 100 to 180 mgKOH/g; the polyether polyol is one or more of polypropylene oxide polyether polyol with the hydroxyl value of 100 to 180 mgKOH/g; the isocyanate prepolymer is formed by prepolymerizing a second chain extender and aliphatic isocyanate, and the NCO content of the prepolymer is 15-35%. The coating is prepared from a polyol component and an isocyanate prepolymer through a transparent coating injection molding process, has excellent ultraviolet aging resistance, scratch resistance and light transmittance, and can be widely applied to the surfaces of decorative parts, household appliance shells, furniture parts and the like in the interior and the exterior of an automobile.

A combination of a non-ionic tri-block poly-propylene-oxide, poly-ethylene-oxide alcohol ether surfactant coupled with block polymer poly(Butadiene-b-Ethylene Oxide) is an excellent surfactant phase to micro-emulsify sebum on contact. A method of micro-emulsification of sebum on contact with inventive compositions according to the present invention will form micro-emulsions which can enhance (1) deep pore cleansing of skin and (2) delivery of skin benefit actives into the skin.

The invention discloses a preparation method of a two-dimensional MXene/polydopamine composite desalination electrode material, wherein the preparation method is characterized by comprising the following steps: (1) self-assembly of a block polymer: firstly, carrying out self-assembly on a polyethylene oxide-block-polypropylene oxide-block-polyethylene oxide PEO20-b-PPO70-b-PEO20 triblock polymer in a solution to form columnar micelles, and taking the columnar micelles as a mesoporous soft template; and (2) preparing the columnar mesoporous MXene/polydopamine two-dimensional composite nanosheet (mPDA/MXene). The invention also provides an application of the two-dimensional MXene/polydopamine composite desalination electrode material in a CDI battery. According to the invention, P123 is used as a soft template, and mesoporous channels are introduced to two sides of MXene, so that the material has a larger internal active specific surface area and ion transmission channels, the electrochemical performance is expected to be improved, and the application prospect of capacitive deionization is achieved.

The invention discloses an elastic surface co-extruded wood-plastic profile which comprises a core material layer, an elastic inner layer and an elastic surface layer, wherein the elastic inner layercomprises the following raw materials in parts by weight: 20-30 parts of natural rubber, 15-20 parts of polypropylene oxide polyols, 15-20 parts of high density polyethylene, 20-25 parts of poplar powder, 3-8 parts of a coupling agent, 2-5 parts of a compatibilizer, 3-5 parts of a plasticizer and 5-8 parts of calcium carbonate; the elastic surface layer comprises the following raw materials in parts by weight: 20-30 parts of high density polyethylene, 20-25 parts of poplar powder, 10-15 parts of an elastic material, 3-6 parts of a compatibilizer, 3-5 parts of a coupling agent, 2-3 parts of anantioxidant, 1-2parts of an ultraviolet-resistant agent and 2-4 parts of calcium carbonate. Designing of a double elastic layer of the co-extruded wood-plastic profile ensures that the co-extruded wood-plastic profile has high resilience, wear resistance and oxidation resistance, and the service life is significantly prolonged.