833 results about "Hyperbranched polyester" 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 invention discloses application of fatty acid ester end group hyperbranched polyester as a high polymer material viscosity reducing and toughening agent. According to the application disclosed by the invention, the fatty acid ester end group hyperbranched polyester is added into a thermosetting polyurethane prepolymer, an epoxy resin prepolymer, thermoplastic polyolefin or polyester for blending, and the viscosity and strength of the blending material are adjusted by adjusting the content of the fatty acid ester end group hyperbranched polyester. Viscosity tests prove that the viscosity of the blending material is reduced along with the increase of the content of the added fatty acid ester end group hyperbranched polyester at a processing temperature, and simultaneously, the mechanical property of the blending material is greatly improved.

The invention provides a radiation-curable alkoxy silanized hyperbranched polyester acrylate, characterized in that the radiation-curable alkoxy silanized hyperbranched polyester acrylate is produced by using a hyperbranched molecule with at least 16 functionalities as a core; acrylating or methacrylating a portion of the terminal groups of the hyperbranched molecule; and terminating a portion of the end groups of the hyperbranched molecule with an isocyanated silane coupling agent. The acrylate of the invention can be formed into a coating on polar substrates, such as glass or metal, or used as an adhesive.

The invention discloses a siloxane modified urethane acrylate hyperbranched oligomer and a preparation method thereof and a multi-curing coating obtained therefrom. The siloxane modified urethane acrylate hyperbranched oligomer is short for Si-PUA aligomer and the weight percentage composition thereof is as follows: 20 wt percent to 50 wt percent of vulcabond, 5 wt percent to 40 wt percent of polylol, 20 wt percent to 50 wt percent of hydroxyl acrylate, 1 wt percent to 20 wt percent of heperbranched polyester, 0.5 wt percent to 10 wt percent of diamino siloxane, 0.001 wt percent to 1 wt percent of catalyst, 0.001 wt percent to 1 wt percent of inhibitor and 5 wt percent to 50 wt percent of reactive diluent. The multi-curing coating containing such Si-PUA aligomer can not only realize ultraviolet light-heat dual curing but also realize moisture curing, thus improving the hardness and enhancing adhesive force of the film thereof and having better properties of water resistance, chemical agent resistance and friction resistance.

The invention discloses hyperbranched polyurethane having self-repairing function in seawater. The hyperbranched polyurethane is prepared from the following raw materials in parts by weight: 213-311 parts of isocyanate-terminated polyurethane prepolymer, 1-16.7 parts of polyhydroxy-terminated hyperbranched polyester, 0.7-18.6 parts of 2,2-dihydromethyl propionic acid, 1-23.7 parts of dopamine hydrochloride and 0.3-6.7 parts of FeCl3. The invention also provides a preparation method and application of hyperbranched polyurethane. A coordination interaction occurs between hyperbranched polyurethane and a pyrocatechol structure in dopamine by virtue of Fe<3+> so as to improve the mechanical properties of the polymer and endow the polymer with the self-repairing function in seawater; the repairing efficiency reaches up to 87% and the polymer has repeated adhesive property in seawater.

The invention relates to hyperbranched polyester modified acrylic resin and a preparation method thereof. Firstly, a By-type polyhydroxylated compound is taken as nuclear molecules (wherein B represents hydroxyl, and the degree of functionality y of B is larger than of equal to 2), ABx-type polyhydroxy acid is taken as divergence molecules (wherein A represents carboxyl, B represents hydroxyl and x represents the degree of functionality of hydroxyl and is larger than or equal to 2), a polyester-type hyperbranched polymer with hydroxyl at the terminal is obtained through a vacuum fusion polycondensation method, and esterification reaction is performed on prepared hyperbranched polyester and acrylic resin with carboxyl in the presence of a water-carrying agent to obtain hyperbranched polyester modified acrylic resin. Acrylate with hyperbranched polyester introduced enriches a great amount of hydroxyl, and is taken as a cross-linking group to greatly reduce the curing time of a coating film; and at the same time, hyperbranched polyester has excellent performance of dendritic polymer, molecular chains are not easily twisted, and hyperbranched polyester modified acrylic resin with high solidity and low viscosity can be obtained. According to the invention, the source of raw materials is wide, the price of the raw materials is low, the synthetic method is simple, the controllability is good, and the production cost is low.

The invention relates to hyperbranched polyester and a preparation method thereof, modified hyperbranched polyester and application thereof in coating and belongs to the field of dispersing agents for coating, and the hyperbranched polyester is a pigment dispersing agent capable of improving the coating effect. The preparation method of the hyperbranched polyester comprises the steps that polyhydric alcohol and polybasic carboxylic acid/acid anhydride are added to a reactor, a catalyst is added to the reactor, the adding amount of the catalyst is 0.1%-5% of the total mass of the polyhydric alcohol and polybasic carboxylic acid/acid anhydride, and the mixture is pre-polymerized to form a polymeric monomer at the temperature of 40-120 DEG C for 1-8 hours; the temperature is raised to 60-250 DEG C and the reaction is performed for 3-20 hours, then the reaction system is subjected to vacummizing, the reaction is continued under the pressure reduction condition until the acid value of the reaction system is reduced to 30 mg KOH/g, and the hydroxyl terminated hyperbranched polyester is prepared. According to the hyperbranched polyester and the preparation method thereof, the modified hyperbranched polyester and the application thereof in the coating, fatty acid monomers are used for modification of terminal groups on the hydroxyl terminated hyperbranched polyester, and the modified hyperbranched polyester which can be taken as the pigment dispersing agent is obtained for the preparation process of the coating.

Disclosed is a thermoplastic composition including at least one semi-aromatic polyamide having a glass transition equal to or greater than 100° C. and a melting point of equal to or greater than 280° C.; a thermally conducting filler having a thermal conductivity of at least 5 W/mK, for instance CaF₂ powder; and at least one hyperbranched polyesteramide having terminal hydroxy groups; and molded articles made therefrom.

The present invention relates to a fluorine-contained ultrabranched polyacrylate which can be used in water-proofing oil-proofing fabric finishing agent and its preparation method. Said method includes the following steps: using hydroxyterminated ultrabranched polyester as reaction substrate, adopting 'direct method' or 'indirect method' to modifying its hydroxyl end group into polymerizable active double bond, then adding perfluorinated acyl chlroide or esters, and making it and residual hydroxyl end group of said ultrabranched polyester implement esterification reaction; finally making part of its terminal group form into acrylate double bond and making its another part form into perfluoroalkyl so as to obtain the fluorine-contained ultrabranched polyacrylate. Then said fluorine-contanied ultrabranched polyacrylate and hydrocarbon (methyl) acrylate are undergone the process of emulsion copolymerization so as to obtain the water-proofing oil-proofing fluorine-contained fabric finishing agent emulsion.

The invention discloses a hyper-branched polyester resin pigment dispersant, a preparation method and color paste thereof, as well as applications of the color paste. The hyper-branched polyester resin pigment dispersant is a dendritic and hyper-branched polyester having hydroxyl functional groups and a 3D structure, the number-average molecular weight of the dispersant is 1500 to 20000, and the solid content of the dispersant is from 20% to 90%. The dispersant is prepared by the following steps: subjecting anhydride to carry out reactions with hyper-branched polyester, and then subjecting the reaction products to carry out reactions with a compound, whose one end is a mono-epoxy functional group and the other end is a hydrophobic long carbon chain, so as to obtain the dispersant. The introduced long chain alkyl/aryl in the dispersant has a structure like the anchor hook, thus the dispersant has a very good compatibility with the main resin molecular of paint, and can reduce the possibility of secondary flocculation or aggregation of the disperse system. The paint or color paste containing the hyper-branched polyester resin pigment dispersant only needs a very short grinding time to meet the fineness requirement; the dispersant is applied to a finished paint to enable the finished paint to have the properties of high hardness and good stability under high-temperature storage or room temperature storage, and effectively reduces the phenomenon of sediment and unfixed dyeing of the finished paint.

The invention relates to a method for preparing an ultraviolet(UV)-curable polyisocyanate modified superbranched epoxy acrylate, which comprises the following steps of: heating maleopimaric acid tri glycidyl ester, maleopimaric acid and a catalyst for esterification reaction to obtain rosin-based superbranched resin; cooling, and adding epoxy chloropropane, water and a catalyst for reaction to obtain superbranched epoxy resin; adding crylic acid, a catalyst and a polymerization inhibitor for reaction to obtain superbranched epoxy acrylic resin; and reacting the superbranched epoxy acrylic resin with ethylene glycol methacrylate terminated para toluene diisocyanate, a catalyst and a polymerization inhibitor to obtain the final product. Compared with the prior art, the method has the advantages that: rosinyl is introduced into superbranched polyester, and the hardness, strength and other special properties of the resin are improved and the curing speed is improved by utilizing the special rigid condensed ring structure of the rosin. The cured product has higher ultraviolet resistance; and by adjusting the using amount of raw materials, superbranched polyester for ultraviolet-curable coatings meeting different coating requirements can be prepared.

The invention discloses application of fatty acid modified hyperbranched polyester to plastic processing, belonging to the technical field of plastic processing aids. The application of fatty acid modified hyperbranched polyester comprises the steps of adding 0.5-3% of fatty acid modified hyperbranched polyester into plastics, uniformly mixing, extruding for granulating, and drying to obtain a modified plastic product. Plastics including polypropylene and the like are modified through mixing the plastics including polypropylene and the like and hyperbranched polyester at a high speed, and then, granulating by extruding through a double-screw extruder; the hyperbranched polyester is added into plastic matrixes, so that the processing temperature of the plastics can be remarkably lowered, the apparent property of the plastics is improved, and relatively high melting flowability is realized through relatively low additive amount; the decomposition temperature of the fatty acid modified hyperbranched polyester is relatively high and can be up to 290 DEG C; and the melt index of the modified plastics is remarkably increased, and meanwhile the dispersing performance of a filling system is improved.

The various embodiments herein provide a hyper branched polyester and a method of synthesizing the same. The embodiments herein also provide a method of encapsulating a drug into the void spaces of the polymer to act as a drug delivery system. The hyper branched polyester mer comprises an acidic moiety and an alcoholic moiety. The acidic moiety is citric acid monohydrate. The alcoholic moiety is glycerol. The acidic moiety and the alcoholic moiety are randomly arranged in the hyperbranched polymer. The method comprises of heating the mixture of citric acid and glycerol at temperatures of 90 to 150° C. by constant stirring for different time periods. In the method of encapsulation, the drug solution is drop-wise added to polymer solution at 37° C. by constant stirring for 24 h.

The invention relates to a fire retardant coating for a steel structure surface of a nuclear power plant. The fire retardant coating consists of components A, B and C at a weight ratio of (4-6): 1: 1, wherein the component A is a mixture composed of 15-35 parts of epoxy resin, 2-10 parts of reactive diluent, 5-15 parts of dehydration catalyst, 10-30 parts of carbonizing agent, 5-20 parts of foaming agent, 15-35 parts of fire retardant, 5-15 parts of smoke inhibitor, 10-30 parts of pigment and filler and 2-10 parts of auxiliaries; the component B is a mixture composed of 10-50 parts of toughened resin, 10-30 parts of pigment and filler and 2-10 parts of auxiliaries; the C component is an amine curing agent; and the toughened resin in the component B is hyper-branched polyester resin with a terminal carboxyl group. The fire retardant coating disclosed by the invention is more excellent than a normal intumescence fire retardant coating in binding strength, freezing and thawing cycle resistance, acid and base resistance, and fire retardant limit, and is specifically up to fire resistance requirements of the steel structure surface of the nuclear power plant.

The invention discloses a preparation method of ultraviolet-curing hyperbranched polyester polyurethane acrylate resin, which comprises the steps of (1) adding diisocyanate, a catalyst and a polymerization inhibitor to a reaction flask at a room temperature, dropwise adding monohydroxyl-terminated acrylate while stirring, performing temperature rise to be 40-50 DEG C, and performing a reaction until a measured NCO value reaches one half during reaction start to form a semi-blocked isocyanate monomer, and (2) keeping a stirring state and dropwise adding hyperbranched polyester and tetrahydrofuran mixed liquid to the reaction flask in Step (1), performing a thermal insulation reaction for 1-8h, performing slow temperature rise to be 40-90 DEG C, performing a stirring reaction for 1-6h, performing temperature rise to be 60-100 DEG C, performing a stirring reaction until the measured NCO value reaches a theoretical value, and removing a solvent. The invention further discloses the ultraviolet-curing hyperbranched polyester polyurethane acrylate resin prepared by the method. The method is simple to operate; raw materials are easy to obtain; and the prepared resin is good in wear resistance and high in curing rate.

The invention belongs to the technical field of UV (ultraviolet) curing glue, and discloses solvent-free UV curing glue for an optical transparent adhesive tape and a preparation method and application thereof. The glue comprises the following components in parts by mass: 20-60 parts of aliphatic polyurethane acrylate, 5-15 parts of hyperbranched polyester acrylate, 10-25 parts of acrylate monomer, 1-10 parts of thiol, 1-10 parts of tackifying resin, 0.1-1 part of leveling agent, 0.5-2 parts of antifoaming agent and 0.5-2 parts of photoinitiator. In the invention, the colloid crosslinking density and colloid strength are improved by preferentially adopting aliphatic polyurethane acrylate with low functionality degree and adding hyperbranched polyester acrylate; the acrylate monomer adjusts the viscosity and enhances the colloid strength; the caking property is improved by adding the thiol containing an ether structure; the prepared non-solvent UV curing glue for an optical transparent adhesive tape has high toughness, high light transmittance, low haze, high colloid strength, high viscosity, high thickness and low VOC (volatile organic compound) content.

The invention discloses a preparation method of water dispersed modified acrylic ester resin for automobile finish varnish. The raw materials of the resin comprise the following components in parts by mass: 5 to 20 parts of modifier, 100 parts of allyl monomer, 1.2-1.8 parts of initiator, 0.8-1.2 parts of molecular weight regulator and 35 to 50 parts of cosolvent, and the resin is obtained by polymerization reaction at 100 -120 DEG C. The modifier is acetoacetyl sealed end BoltornTM series dendritic hyperbranched polyester or acetoacetyl sealed end pentaerythritol. The cured varnish film of the water-based automobile finish varnish prepared by modified resin obtained by the method of the invention has obviously higher water resistance, alkali resistance, acid resistance, salt fog resistance and ultraviolet light aging resistance compared with not modified water-based automobile finish varnish, and has high gloss and excellent physical mechanical property.

The invention discloses fluorinated hyperbranched polyester acrylate and a preparation method thereof. Fluoride-alcohol and hydroxy acrylate are chosen to react with diisocyanate respectively to achieve two semi-additive products, and the two semi-additive products in proper proportions are used to react with hydroxyl-terminated hyperbranched polymer, to achieve hyperbranched polymer fluorine terminated bases with acrylic acid ester base groups and halothane base groups linked to the hyperbranched molecular framework through carbamate base groups as well as acrylic acid modified hyperbranched polymer. The iso-cyan acid radical reaction of the method has high activity, the Fluoro-alcohol conversion rate is high, the raw materials are cheap and easy to obtain, the operation is easy, and capable of facilitating industrial production. The fluoric hyperbranched polyester acrylate achieved by the method can be applied to ultraviolet-light solidification coating, the achieved coating has sound hydrophobic and oleophobic performances, and the industrial application is very broad.

The invention discloses abietyl hyper branched epoxy resin and a preparation method thereof. The method comprises the following steps: a) maleopimaric anhydride and bio-dihydric alcohol, a benzene solvent, and a catalyst are reacted, the benzene solvent is removed through pressure reduction to obtain the abietyl hyper branched polyester; and b) the abietyl hyper branched polyester and chloropropylene oxide are subjected to a reaction under the effect of an open loop reaction catalyst, the unreacted chloropropylene oxide is removed through pressure reduction, an organic solvent and an alkalescence catalyst are added for the reaction, and then processing is carried out to obtain the abietyl hyper branched epoxy resin. The invention also discloses an application of the resin. The rosin is introducecd into a hyper branched epoxy resin structure, a special hydrogen phenanthrene ring structure of rosin is used, rigidity, heat resistance and solidification speed are increased, viscosity is low, hydroxy is not contained, so that the epoxy resin can be used for the fields of high temperature resistance gluing agent, high temperature resistance paint, environmental protection low volatilization paint, low volatilization resin and routine epoxy resin.

The invention discloses a low-floating-fiber high- glossiness glass fiber reinforced polyamide composition and a preparation method thereof. The composition comprises 30 to 85 parts by weight of polyamide resin, 15 to 60 parts by weight of glass fiber, 0.1 to 10 parts by weight of nanometer filler and a rheological regulator in an amount which is 0.08 to 5.0 percent of the weight of the glass fiber, wherein the nanometer filler and the rheological regulator are limited, particularly the structure of modified hyperbranched polymer in the rheological regulator is specifically limited. Due to adoption of the rheological regulator, the retention distribution range of melt in processing equipment can be reduced to a great degree and the product appearance defect caused by the part which exceedsthe ideal retention time limit value is reduce; in particular, the nanometer filler which integrates the special structure and the effect has remarkable beneficial effect of improving the appearanceof the glass fiber reinforced polyamide composition; the obtained polyamide composition has high glossiness and little floating fiber, and still can maintain excellent physical and mechanical properties while embodying good product appearance.