39results about How to "Increased double bond content" patented technology

The invention discloses a high-solid-content UV-curing aqueous urethane acrylate dispersion liquid and a preparation method thereof, wherein the method comprises the following steps of: firstly carrying out the monoesterfication reaction on the partial hydroxide group at the tail end of hyperbranched polyester and the anhydride group of dicarboxylic anhydride to obtain an intermediate I; carrying out the end capping reaction on an isocyanate group in diisocyanate and the hydroxide group in a hydroxyalkyl methacrylate monomer to obtain a reaction intermediate II; carrying out the reaction on the residual hydroxide group of the intermediate I and the residual isocyanate group of the reaction intermediate II to obtain a reaction intermediate III; and carrying out alkali neutralization, aqueous dispersion and reduced-pressure distillation on the reaction intermediate III to remove an organic solvent to obtain the UV-curing urethane acrylate aqueous dispersion liquid. The dispersion liquid has the characteristics of high solid content, relatively low viscosity, UV curability, good mechanical performance of a paint film and the like, conforms to the concept of environmental protection, can be applied to the fields of environment-friendly coatings, aqueous ink, aqueous adhesives, fabric coating agents and the like and has broad prospect.

The present invention discloses a modified ethylene propylene diene monomer and a preparation method thereof, wherein an ethylene propylene diene monomer is subjected to grafting modification with Nadic anhydride having a structure represented by a formula (1) to prepare the modified ethylene propylene diene monomer, and the grafting rate of the modified ethylene propylene diene monomer is 0.4-3.5 wt% by adopting the weight of the modified ethylene propylene diene monomer as the reference. The preparation method comprises that under an olefin ring-opening cross-metathesis reaction condition, in the presence of a catalyst having a structure represented by a formula (2), an ethylene propylene diene monomer contacts Nadic anhydride in an organic solvent. According to the present invention, the preparation method has advantages of high grafting rate, quick reaction, simple steps, and easy performing; and compared to the unmodified ethylene propylene diene monomer, the modified ethylene propylene diene monomer of the present invention has the following advantages that the unsaturation is 0.44-0.68 mol/kg, and the vulcanization rate is increased to a certain degree. The formulas (1) and (2) are defined in the specification.

The invention discloses recoat-able polishing-free unsaturated polyester resin for piano lacquer and a preparation method of the unsaturated polyester resin. The unsaturated polyester resin comprises the following components in percentage by weight: 15 to 25 percent of an air-dry monomer, 25 to 35 percent of polyatomic acid, 20 to 30 percent of polyhydric alcohols, 20 to 30 percent of a solvent, 0.05 to 0.1 percent of an antioxidant and 0.01 to 0.05 percent of a polymerization inhibitor. The preparation method comprises the following steps: adding the polyatomic acid, the polyhydric alcohols, the solvent and the polymerization inhibitor into a reaction kettle in sequence, switching on stirring and heating at the same time, heating to 180 to 200 DEG C, and preserving the heat; continuously detecting an acidity value, cooling to 120 DEG C when the acidity value is reduced to 120 to 130mgKOH/g, then cooling to 120 DEG C and adding the air-dry monomer, uniformly heating to 200+/-5 DEG C by 3 hours, preserving the heat until the viscosity and the acidity value are qualified, then cooling and diluting the materials, performing filtration, and discharging a product. The piano lacquer prepared from the unsaturated polyester resin serving as a base material is high in surface hardness, and is higher in glossiness and transparency without polishing, construction period is short, the unsaturated polyester resin is recoat-able, convenient to prepare, and can be generally used in the bottom surface, and the production efficiency is greatly improved.

The invention provides a synthesis method of hyperbranched polyester. The synthesis method comprises the following steps: adding trimethylolpropane and 2,2-dimethylolpropionic acid and reacting untilan acid value is lower than 20 mgKOH/g; adding a first terminating monomer and reacting until an acid value is 25 to 30 mgKOH/g; and adding a second terminating monomer, reacting until an acid value is lower than 25 mgKOH/g and vacuumizing to obtain the hyperbranched polyester. The method disclosed by the invention can effectively control the reaction process; and meanwhile, the obtained product has higher compatibility with unsaturated polyester.

The invention discloses a reactive emulsifier for emulsion polymerization, a preparation method and application thereof. The reactive emulsifier includes the compound(s) shown as formula (I) and/or formula (II) in the specification. The preparation method includes: carrying out ring-opening reaction on fatty primary amine and a glycidyl ether compound with unsaturated double bond, then conducting alkoxylation on the product to obtain a nonionic reactive emulsifier with a reactive double bond and an anionic reactive emulsifier derived therefrom. The emulsifier provided by the invention employs the reaction of primary amino and the glycidyl ether compound to introduce the double bond, the reaction activity and selectivity are stronger, and the reaction conditions are milder, the double bond loss in the reaction can be reduced, and the reactive double bond content of the final emulsifier product can be increased. In the process of emulsion polymerization, the emulsifier has higher reactivity with monomers, and can improve the water resistance of emulsion products more effectively.

The invention discloses a photosensitive solder resist material with short exposure time. The photosensitive solder resist material comprises the following components in parts by weight: 35-40 parts of photosensitive resin, 5-10 parts of polyurethane acrylate, 5-10 parts of acrylic acid monomers, 4-8 parts of epoxy resin, 1-4 parts of a pigment, 25-35 parts of a filler, 5-10 parts of a photoinitiator, 1-5 parts of an auxiliary agent and 3-8 parts of a solvent. Photosensitive resin is obtained by carrying out a polymerization reaction on acrylic acid and o-cresol formaldehyde epoxy resin, and then sequentially reacting a reaction product with anhydride and glycidyl methacrylate. The exposure time of the prepared photosensitive solder resist material is short, and is only 5-10 seconds, and the exposure time of traditional ink is generally about 20-25 seconds, so that the exposure time is shortened by 1-5 times compared with the traditional exposure time; the photosensitive solder resistmaterial also has the advantages of high temperature resistance, acid and alkali resistance, heat and oil resistance, high adhesive force and high hardness; and a solder resist mask obtained by coating has excellent insulativity and high temperature resistance.

The invention provides an epoxy resin for a crazing-resistant photocuring solder resist coating material and a preparation method of the epoxy resin, and provides the crazing-resistant photocuring solder resist coating material prepared from the epoxy resin, and a preparation method of the crazing-resistant photocuring solder resist coating material. According to the invention, acrylic acid is introduced through a ring-opening reaction, and then the hydroxyl group and long aliphatic chain anhydride are subjected to an esterification reaction to obtain the epoxy resin, wherein the long chain anhydride is introduced into the reaction of hydroxyl and anhydride in the second step, so that flexibility is provided for the system, chain segment movement is enhanced, the glass transition temperature of the polymer is reduced, and the purposes of reducing the development of the crazing or easily treating the crazing to retract and disappear can be achieved; and the weather resistance, low temperature resistance, impact strength, fatigue resistance and other properties of a cured product of the coating material are enhanced, the application field of the solder resist photocureable coating material is widened, and the requirements of the current photocureable industry on the solder resist coating material are met.

The invention discloses modified aldehyde-ketone resin as well as a preparation method and an application thereof. According to the preparation method, double-bond-containing carboxylic acid, a catalyst, a solvent, a polymerization inhibitor, a decolorizing agent and a solid water absorbent are added to a reaction kettle firstly and uniformly stirred, steam heating and thermal insulation are performed, polybasic hydroxycarboxylic acid is added, and the mixture has a reflux reaction; a aldehyde-ketone resin solution is added, and the mixture has a reflux reaction; washing, layering and suction filtration are performed, the solvent is removed, and the modified aldehyde-ketone resin is obtained. The modified aldehyde-ketone resin is added to light-cured resin and monomers, a photoinitiator is added, the mixture is uniformly stirred, and photo-cured coating composition can be obtained. The prepared modified ketone-aldehyde resin has higher double-bond content, a coating film of a resin system can obtain higher crosslinking density after photocuring, and the cured coating film has excellent oil resistance, ageing resistance and solvent resistance.

The invention relates to a temperature-resistant thickening light-cured epoxy vinyl ester resin and a preparation method thereof, and specifically discloses an epoxy vinyl ester resin composition. Thecomposition comprises components (A) to (G). The invention also discloses a method for preparing the resin composition, and a resin product comprising the resin composition.

The invention discloses a polypropylene composition for improving a surface flame treatment effect and a preparation method of the polypropylene composition. The composition is prepared from, by weight, 40-70 parts of polypropylene resin, 10-20 parts of POE, 5-15 parts of a styrenic block copolymer, 10-30 parts of filler, 3-5 parts of maleic anhydride grafted polypropylene, 0.5-2.0 parts of pigments and 0.2-2.0 parts of auxiliary agents. By introduction of the styrenic block copolymer with a main chain containing unsaturated double bonds into a conventional polypropylene and filler system, thesurface double bond content is increased, and polymer surface polarity is improved; since the double bonds can be easily oxidized by high-temperature flame, more oxygen-containing functional groups can be introduced, surface tension and wettability are improved, the surface flame treatment effect can be evidently improved by the prepared polypropylene composition, and the polypropylene composition can be used for preparation of automobile full-plastic tail door outer plates and spoilers and has great surface flame treatment and adhesion performances.

The invention relates to the field of rubbers, and discloses a modified ethylene propylene diene monomer and a preparation method thereof, wherein the modified ethylene propylene diene monomer contains a third structure unit derived from a third monomer, the third monomer is a non-conjugated diolefin, at least the part of the third structure unit contains a grafting group derived from a compound having a structure represented by a formula (1), and the grafting rate of the modified ethylene propylene diene monomer is 0.4-3.3 wt% based on the weight of the modified ethylene propylene diene monomer. The preparation method comprises that an ethylene propylene diene monomer contacts the compound having the structure represented by the formula (1) in an organic solvent in the presence of a catalyst having a structure represented by a formula (2) under the conditions of an olefin ring-opening cross metathesis reaction, wherein the ethylene propylene diene monomer contains the structure unit derived from the third monomer, and the third monomer is the non-conjugated diolefin. According to the present invention, the method has advantages of high grafting rate, rapid reaction and simple andeasy-performing steps, and can improve the vulcanization rate of the ethylene propylene diene monomer. The formulas (1) and (2) are defined in the specification.

The invention relates to an amphiphilic allyl polymer for a sewage treatment demulsifier and a preparation method thereof, and belongs to the technical field of polymer synthesis industrial sewage treatment. The amphiphilic allyl polymer is obtained by carrying out a polymerization reaction on diallyl-terminated polyether and one or more of low-hydrogen silicone oil, acrylamide (AM), acrylic acid(AA) and chloropropene. The amphiphilic allyl polymer for a sewage treatment demulsifier has the characteristics of strong demulsifying capacity, high demulsifying speed, low dosage, low demulsifyingtemperature and particular suitability for thick oil emulsion; and meanwhile, the invention provides a simple and convenient preparation method.

The invention discloses an aerogel fireproof coating, and belongs to the technical field of building materials. The aerogel fireproof coating is prepared according to the following steps: stirring andmixing hollow glass beads with hydrofluoric acid, conducting filtering and washing to obtain pretreated hollow glass beads, mixing the pretreated hollow glass beads, bacillus pasturii, urea and water, conducting fermentation, then adding a calcium nitrate solution, conducting stirring and mixing, and conducting filtering, washing, drying and high-temperature treatment to obtain a modified thermalinsulation filler; and stirring and mixing the modified thermal insulation filler, a flame retardant, a binder, a plasticizer, a stabilizer, a modified additive, a moisture-proof agent, water, a surfactant, wood chips, an organic acid and unsaturated polyester resin to obtain the aerogel fireproof coating. The aerogel fireproof coating prepared by the technical scheme has the characteristics of excellent heat insulation performance and fire resistance.

The invention discloses a preparation method of high cross-linking ultraviolet cured waterborne polyurethane. The method comprises the following steps of performing a reaction between macromolecular dihydric alcohol, polyisocyanate with double bond and diisocyanate for 2-4h at the temperature of 90-100 DEG C; adding a micromolecular chain extender, a hydrophilic chain-extending agent I, solvent and a catalyst to react for 4-7h at the temperature of 60-80 DEG C; adding solvent and a hydrophilic chain-extending agent II to react for 0.5-1h at the temperature of 50-60 DEG C; adding solvent, and adding a salt-forming agent under high-speed cutting, adding water after stirring for 1-5min and adding a post chain-extending agent which is diluted by 3-5 times of water after dispersing and emulsifying for 2-5min at high speed, stirring for 20-40min, and then desorbing the solvent under vacuum to acquire the waterborne polyurethane. The high cross-linking ultraviolet cured waterborne polyurethane which is solidified by UV has high cross-linking density and molecular weight, and excellent chemical resistance and mechanical performance.

The invention provides a soybean oil-based resin and a preparation method thereof, a soybean oil-based resin cured product and a preparation method thereof, belonging to the technical field of functional materials. In the invention, vanillol is taken as a raw material to undergo a first esterification reaction with methacrylic anhydride, and generated vanillol methacrylate retains the rigid benzene ring structure of the vanillol, has high double bond content and low viscosity, is an ideal reactive diluent, and can replace styrene as a diluent for subsequent second esterification reaction; meanwhile, the remaining methacrylic anhydride after the first esterification reaction and epoxidized soybean oil acrylate undergo a second esterification reaction to realize the modification of the epoxidized soybean oil acrylate, and the preparation method is beneficial to ensuring that the obtained soybean oil-based resin is cured to obtain the soybean oil-based resin cured product with high crosslinking degree, excellent thermal stability and excellent mechanical properties.

The invention discloses an all-plastic tail door outer plate material with low linear expansion coefficient and easy adhesion. The all-plastic tail door outer plate material is prepared from the following components in parts by weight: 45 to 61 parts of polypropylene, 8 to 15 parts of styrene-isoprene-styrene block copolymer, 5 to 10 parts of polarity improver, 15 to 30 parts of enhancer, 3 to 6 parts of compatilizer, 0.4 to 0.6 part of antioxidant and 0.2 to 0.4 part of light stabilizer. The invention further discloses a preparation method of the all-plastic tail door outer plate material. By adding the reinforcing agent, the mechanical property of the material is improved, and the linear expansion coefficient of the material is reduced; the surface polarity of the material is improved by adding the styrene-isoprene-styrene block copolymer; through the synergistic effect of the nitrile rubber and the compatilizer, the surface polarity of the material is improved, and the bonding strength of the material is improved. The material prepared by the invention has the characteristics of low linear expansion coefficient and easiness in adhesion, and is particularly suitable for manufacturing an all-plastic tail door outer plate.

The invention discloses polyester polyol as well as a preparation method and application. The polyester polyol is prepared from the following components in parts by mass through a condensation polymerization reaction: A) 100 parts of dibasic acid or derivatives thereof; B) 50-500 parts of polyol containing a double bond; and C) 0-200 parts of small molecule dibasic alcohol without a double bond. The preparation method for the polyester polyol is used for preparing through a conventional condensation polymerization reaction. The invention further provides application of the polyester polyol topreparation of photocurable polyurethane resin. The polyester polyol disclosed by the invention has the technical advantages that the polyester polyol has relatively high content of double bond; and all performance of the photocurable polyurethane resin can be improved and the dosage of active monomer acrylates can be reduced or acrylates are not added into a resin system in a resin preparation process, so that the influences on the performance of the resin, caused by the acrylates, are reduced.