109results about How to "Not easy to gel" patented technology

The invention discloses long-chain branched polyester and a preparation method thereof. The long-chain branched polyester is obtained by carrying out esterification and polycondensation on a diacid component A, a diacid component B and a bifunctional branching agent component C such as biglycidyl ester, diglycidyl ether or glycidol and the like. According to the invention, a non-toxic bifunctional branching agent is directly adopted to in situ generate branching points; the preparation method is unique, preparation process is simple and environmentally-friendly, branching reaction is uniform,branching degree is easy to regulate and control, and the high molecular weight long-chain branched polyester can be prepared; and the preparation method can be used for preparation of non-degradablepolyester and preparation of biodegradable polyester, thereby being beneficial to the realization of commercialization. The long-chain branched polyester has the characteristics of long-chain branching and large molecular weight in structure and is beneficial to increase of melt strength and improvements of blow molding and foaming processing performance.

The invention discloses a preparation method of an anion sulfonate type coal water slurry dispersant. A terpolymer is prepared from an anion monomer and a sulfonate monomer as reaction monomers under the action of an initiator and a chain transfer agent through free radical polymerization. By using the dispersant obtained by the preparation method disclosed by the invention, coal water slurry with solid content of 60-70% has excellent dispersion and stabilization effects; and the dispersant is suitable for various coal species, in particular slurrying of coal with poor quality.

The invention discloses a preparation method of hyperbranched polyurethane/polyacrylate damping material, which comprises the following preparation steps: (1) partially end capped waterborne polyurethane prepolymer is synthesized by a traditional method; (2) the self-made hydroxyl-terminated hyperbranched polyurethane is reacted with isocyanate group to be grafted to the waterborne polyurethane prepolymer, thereby obtaining hyperbranched waterborne polyurethane prepolymer; (3) triethylamine and partial vinyl monomer are added in the prepolymer to ionize, and added with water to disperse to obtain polyurethane/vinyl monomer dispersing liquid under high-speed stirring; (4) the temperature of the dispersing liquid is raised to 65-80 DEG C, and the dispersing liquid is dripped with residual vinyl monomer, initiator and a crosslinking agent to react for 2-6h in heat preservation; and the reacted liquid is cooled to obtain the hyperbranched polyurethane/polyacrylate emulsion. The material obtained by coating the hyperbranched polyurethane/polyacrylate emulsion and curing has the characteristics of excellent damping performance and heat resistance, can be used in the fields such as automobile industry and constructional engineering, and has wide application prospect.

The invention provides a preparation method of organic fluorine modified hyperbranched water-based polyurethane. The method comprises the following steps: (1), synthesizing water-based terminal hydroxyl hyperbranched polyurethane core; (2), synthesizing a double bond end capped linear polyurethane prepolymer through diisocyanate, low polymer divalent alcohol, a chain extendor, an end-capping reagent and the like; (3), grafting linear polyurethane onto terminal hydroxyl hyperbranched polyurethane; (4), leading a fluorine element onto a polymer through an emulsion method, so as to obtain the organic fluorine modified hyperbranched water-based polyurethane. According to the organic fluorine modified hyperbranched water-based polyurethane provided by the invention, raw materials are cheap and readily available, and are wide in sources, the synthesis process is simple, and industrialized production is facilitated. The organic fluorine modified hyperbranched water-based polyurethane is appropriate to be used independently, can be matched with other water-based resins, can be applied to the fields of water-resistant paints, environment-friendly water-based adhesives, water-based paints and the like, and has a broad application prospect.

The invention provides a reverse osmosis membrane scale inhibitor. The reverse osmosis membrane scale inhibitor mainly comprises organic phosphonic acid, organic carboxylic polymers, sulfonic copolymers, a quaternary phosphonium salt, and methane dithiocyanate. The invention further provides an application of the reverse osmosis membrane scale inhibitor in scale inhibition of a reverse osmosis system. When used for reverse osmosis water treatment, the reverse osmosis membrane scale inhibitor provided by the invention can effectively eliminate membrane pollution caused by deposition of CaCO3, CaSO4, SiO2 and silicate; working efficiency of the reverse osmosis system is improved, service lives of the reverse osmosis membrane and reverse osmosis equipment are prolonged, and reverse osmosis cost is reduced; the reverse osmosis membrane scale inhibitor is compatible with various common flocculating agents such as polyaluminum chloride and cationic polyacrylamide; and a pH value is not required to regulate.

The invention discloses a delayed-combustion-retarding high-temperature-resisting workshop primer. The key technology is that high-temperature film-forming materials are used. Two high-temperature film-forming materials are compounded in the formula, the melting points of the high-temperature film-forming materials are respectively in a range of 480-490 DEG C and a range of 680-700 DEG C, accordingly a primary film material can be followed to form a secondary continuous film and a ternary continuous film before the high-temperature heat weightlessness is not yet invalid completely, and coatings are ensured to be not crack. Simultaneously, the heat resistance of the coatings reaches to more than 800 DEG C, the area of the burning loss is very small, and smoke is hardly produced in the cutting or welding operation process.

A method for controlling the level degree on the ULSI multi-layer wiring in chamico-mechanical polishing includes such steps as diluting SiO2 hydrosol by deionized water, adding metal ion chelating agent to regulate pH=10-13, adding alcohol-ether kind of surfactant and oxidant while stirring to obtain polishing liquid, and polishing at 20-40 deg.C and 60-120 rpm under 100-250 g/sq.cm.

The invention relates to a method of preparing hyperbranched polythioether based on selective thiol-ene and thiol-epoxy click chemistry. According to the method, difunctional glycidyl acrylate monomers and trifunctional mercaptan are used as raw materials, and hyperbranched polythioether with a controlled skeleton and end group is synthesized by a one-pot method. The hyperbranched polythioether click chemical preparation method has the advantages that the raw material is easy to obtain, the steps are simple, the polymerization rate is rapid, the controllability is good, the skeleton of the prepared hyperbranched polythioether can be controlled, and the end group can be effectively controlled to be thiol or epoxy by using the monomeric molar ratio; functional modification can be further conducted, and the hyperbranched polythioether with particular characteristics is prepared.

The invention relates to N, N-dimethyl dodecyl terminal quaternization modified silicone oil, and a preparation method and application thereof. The preparation method comprises the steps of reacting octamethyl cyclotetrasiloxane and tetramethyl dihydro disiloxane according to the proportion in the presence of an acid catalyst so as to prepare double-terminal hydrogenous silicon oil; carrying out hydrosilylation reaction on the silicon oil and glycidyl allyl ether or allyl polyoxyethylene polyoxypropylene glycidyl ether to obtain epoxy-terminated silicone oil; and finally, carrying out aminolysis ring-opening reaction on the epoxy-terminated silicone oil and N, N-dodecyl tertiary amine to obtain the terminal quaternization modified silicone oil. The silicone oil is used as a textile finishing agent for treating cotton fabrics, so that the cotton fabrics are endowed with an antibacterial property, meanwhile, the softness of the cotton fabrics can be also improved, and the hydrophilia is better at the same time.

The present invention is composite boron nitride paint for precise invested mold casting of titanium and titanium alloy, and belongs to the field of non-ferrous metal casting technology. The composite paint consists of boron nitride 29-65 wt%, Yt sol or zirconium diacetate 33-70 wt%, surfactant 0.1-5 wt% and defoaming agent 0.1-5 wt%. The boron nitride is boron nitride 200 mesh below grains of pyrolytic boron nitride, crushed cold pressed boron nitride block, high purity boron nitride or boron nitride with small amount of flux. The composite boron nitride paint has the features of high floatability, easy maintenance and simple preparation process.

The invention relates to a field of silica gel materials, and discloses silicone resin and a preparation method thereof. The silicone resin is the silicone resin containing an alkenyl active group and having a three-dimensional mesh-like structure. The method comprises co-hydrolyzing an end-capping reagent and the silane agent containing the alkenyl functional group in the presence of an acid catalyst, adding tetrafunctional organic silicon monomer in drops, performing a hydrolysis-condensation reaction, extracting, cleaning, and distilling to obtain the silicone resin solution containing the alkenyl. The silicone resin provided by the invention not only improves adhesion, reinforcement and other aspects of performance with metal materials and inorganic materials, but also has good compatibility and dispersibility. The method for preparing the silicone resin provided by the invention uses a nontoxic and harmless extractant to substitute toluene used in prior art, and thus does not cause harm to human and pollute the environment; and the silicone resin is not easy to gel, and wide in application.

The invention discloses an environment-friendly nickel-plating rust-proof sealing agent and a preparation method thereof and belongs to the technical field of metal surface treatment. The environment-friendly nickel-plating rust-proof sealing agent is characterized in that 100 parts of the sealing agent comprise, by mass, 6.0-10.0 parts of lithium silicate, 0.6-1.5 parts of sodium silicate, 0.6-1.0 part of sodium molybdate, 0.4-0.6 part of sodium phytate, 0.1-0.2 part of benzotriazole, 0.4-0.6 part of polyethylene glycol, 0.4-0.6 part of polyving akohol, 1.0-2.0 parts of triethanolamine, and the balance deionized water. The nickel-plating rust-proof sealing agent is environmentally friendly, safe and good in stability and has remarkable anti-corrosion effect on steel nickel-plating parts, and gelling is not prone to occurring.

The invention relates to a catalytic cracking catalyst and a preparation method thereof. The preparation method of the catalyst comprises the following steps of: leading soluble glass and acid to contact to prepare alkaline silicasol with the pH value of 10-11.5 and the SiO2 content of 3-20wt%, mixing the alkaline silicasol and active components, pulping and drying. The pore volume of the cracking catalyst prepared by the preparation method of the catalyst in the invention is higher. The catalyst of the invention has higher capability of heavy oil cracking for catalyzing and cracking the heavy oil.

The invention provides preparation and degradation methods of hot-melt phenolic resin and a composite material thereof, and relates to the technical field of high polymer materials and chemical recovery thereof. The preparation method of the hot-melt phenolic resin comprises the following specific steps of: carrying out heating reaction on a phenolic compound and an aldehyde compound under the action of a catalyst, cooling, adding arylboronic acid and a derivative thereof, heating, boiling and refluxing again, carrying out decompression dehydration after the reaction is finished, adding a modifier and a flexibilizer, and vacuumizing to obtain the hot-melt phenolic resin. The preparation method of the hot-melt phenolic resin-based composite material comprises the following steps of: preparing a resin adhesive film from the hot-melt phenolic resin by adopting a hot-melt preimpregnation method, compounding the resin adhesive film with a fiber reinforcement body, and carrying out hot-pressing treatment to obtain the hot-melt phenolic resin-based composite material. The hot-melt phenolic resin and the hot-melt phenolic resin-based composite material are heated and decomposed in an ethanol or acetone solvent, and can be degraded and recycled. The preparation process is simple to operate and low in energy consumption, the production process is easy to control, and large-batch continuous production can be realized. The degradation process is safe, environment-friendly, green and pollution-free.

The invention belongs to the technical field of waterborne polyurethane adhesive, and discloses an amphoteric waterborne polyurethane adhesive with high solid content and a preparation method thereof. The preparation method comprises the following steps: synthesizing an amino-containing cationic hydrophilic cross-linker; adding polyester polyol into a polymerization reactor, distilling under reduced pressure to remove water, adding polyisocyanate and a catalyst, and reacting while stirring; adding the cationic hydrophilic cross-linker and a chain extender, and reacting while stirring; adding an organic solvent and a hydrophilic chain extender containing a sulfonic acid group, and continuously reacting while stirring; adding water and a silicane coupling agent to a dispersion barrel filled with the reactant, performing high-speed shear emulsification, and adding a post chain extender for reacting; and distilling under reduced pressure, and then adding a defoaming agent and a thickener to obtain the amphoteric waterborne polyurethane shoe adhesive with high solid content. The amphoteric waterborne polyurethane shoe adhesive with high solid content substantially does not have solvent residue, has excellent mechanical properties and good water and heat resistance, and can substitute the present commercial mature solvent type adhesive.

The invention discloses a thermoset fluororesin powder coating preparation method. The method includes the steps that 1, by weight, polymerized media, fluorine-containing monomers, functional-group-containing monomers, other monomers and initiators react with one another at the temperature of 58 DEG C to 95 DEG C for 10 h to 20 h, discharging and filtering are conducted after unreacted gas-phase monomers are cooled and recycled, and a thermoset fluororesin transparent solution is obtained; 2, by weight, the thermoset fluororesin transparent solution obtained in step 1 is placed into a closed container, then curing agents, titanium dioxide, flatting agents and defoaming agents are added to the thermoset fluororesin transparent solution to be evenly stirred, and thermoset fluororesin coating composition dispersion liquid is obtained; 3, the obtained thermoset fluororesin coating composition dispersion liquid obtained in step 2 is dried, and a thermoset fluororesin powder coating is obtained. The thermoset fluororesin powder coating preparation method has the advantages of being simple in process, high in yield and excellent in product performance.

The invention provides a self-polishing antifouling resin and a preparing method thereof. The self-polishing antifouling resin is prepared from, by weight, 10-44 parts of a bifunctional zinc acrylate monomer solution, 55-70 parts of other acrylate polymerizable unsaturated monomers, 0.8-5 parts of an initiating agent and 40-55 parts of a mixed solvent. The self-polishing antifouling resin comprises the bifunctional zinc acrylate monomers and other free-radical-initiated-polymerization unsaturated monomers, and the mixture is prepared into a matrix resin component in an antifouling coating for an environment-friendly ship through copolymerization. According to the self-polishing antifouling resin and the preparing method thereof, synthesized cross-linking-type zinc acrylate resin serves as the antifouling coating of a main film-forming substance, and has the good base-material adhesive force, the certain self-polishing rate, the good antifouling effect in the ocean environment and good practical applications and development prospects.

The invention belongs to the technical field of macromolecular polymerization and discloses monodisperse micron elastic microsphere powder as well as a preparation method and an application thereof. The microsphere powder is prepared as follows: mixing polyurethane acrylate and a vinyl monomer to obtain a prepolymer, preparing a pre-suspension by free radical polymerization after adding an initiator and a stabilizer, introducing nitrogen into the pre-suspension, performing heating to obtain a polymer suspension, and drying the polymer suspension to obtain the microsphere powder, wherein the polyurethane acrylate is obtained by dropwise adding polyol to isocyanate and performing blocking by a hydroxyl-containing acrylate monomer. The method is simple, no solvent is used, and industrial production and application of microspheres are facilitated. The obtained polymer microspheres have high elasticity and monodispersion, elasticity, particle size and particle size distribution of the product can be controlled by simply changing experimental conditions, and the product can be widely applied to cosmetics and coatings to increase elasticity and touch.