835 results about "Hyperbranched polyester" patented technology

A method for inhibiting hydrate formation in a hydrocarbon flow by adding an amount of a dendrimeric compound effective to inhibit formation of hydrates at conduit temperatures and pressures, and flowing the mixture containing the dendrimeric compound and any hydrates through the conduit. Preferably, a hyperbranched polyester amide is used as hydrate formation inhibitor compound.

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 an application of hyperbranched polyester to plastic processing, and belongs to the technical field of plastic processing assistants. The application of the hyperbranched polyester to plastic processing includes the steps that by mass, 0.1% to 5% of the hydroxyl-terminated hyperbranched polyester is added into plastic; the mixture is mixed to be even, extruded, prilled and dried, and a modified plastic product is obtained. According to the application, the plastic such as PPC and the hyperbranched polyester are melted and blended, and the plastic such PPC is modified through a double-screw extruder; after the hyperbranched polyester is added into a base material of the plastic such as PPC, the effective melt viscosity of the plastic such as PPC can be remarkably reduced; in other words, processing temperature and thermal degradation are reduced; in addition, melting fluidity improved in this way can also be achieved through the small adding amount,, and extruding film forming can be more easily achieved; the tensile strength of the modified plastic such as PPC is up to 30 MPa, and the strength can be higher than the strength of thin-film-level LLDPE and the strength of thin-film-level PVC.

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 provides a preparation method of a hyperbranched polyurethane acrylate interpenetrating polymer network waterproof agent. The method comprises the following steps: (1), synthetizing a waterborne polyurethane prepolymer with ends partially capped; (2), introducing hydroxyl-terminated hyperbranched polyester, and grafting by virtue of reaction between isocyanate in the waterborne polyurethane prepolymer and the hydroxyl of the hyperbranched polyester, thereby obtaining a hyperbranched waterborne polyurethane prepolymer; (3), adding part of ethenyl monomers and a neutralizing agent, salifying, and adding deionized water while stirring at a high speed so as to realize dispersion, thereby obtaining a hyperbranched waterborne polyurethane emulsion; and (4), dropwise adding residual ethenyl monomers and an initiator into the hyperbranched waterborne polyurethane emulsion, thereby obtaining a hyperbranched waterborne polyurethane / acrylate interpenetrating network structure emulsion. The emulsion has excellent waterproof performance, good washable and abrasion-resistant performances and does not contain PFOA and PFOS. The hyperbranched structure has a self-recovery function, is capable of realizing self repairing of damaged regions and is long in waterproof performance duration time.

The invention discloses caprolactone modified hyperbranched polyester, and a preparation method and an application thereof. The preparation method includes mixing polyatomic alcohol with dihydroxytoluene alkyl carboxylic acid by mole part, adding acid catalysts and reflux solvents to react under N2 protection at 140-230 DEG C so as to obtain hyperbranched polyester; adding fatty acid into the hyperbranched polyester serving as the substrate, adding the acid catalysts and the reflux solvents to carry out reflux reaction under N2 protection at 140-240 DEG C until the acid value is lower than 15mgKOH / g so as to obtain the fatty acid modified hyperbranched polyester; and finally adding caprolactone and organic tin catalysts into the fatty acid modified hyperbranched polyester to react under N2 protection at 130-230 DEG C, and removing the organic solvents to obtain the caprolactone modified hyperbranched polyester. The caprolactone modified hyperbranched polyester has no defect of overhigh viscosity as the conventional hyperbranched resin, and good-performance coating films can be obtained after the caprolactone modified hyperbranched polyester is in crosslinking with the polyurethane curing agents. The preparation method can be used for preparing high-solid-content and solvent-free coatings.

The invention provides two-coating type ultraviolet light curing paint, which comprises primer and finish paint, wherein the finish paint comprises 15 to 25 weight parts of high-functionality polyurethane crylic acid resign, 10 to 15 weight parts of hyperbranched polyester acrylic resin, 10 to 20 weight parts of organic-inorganic hybrid resin, 10 to 15 weight parts of hexa-functionality acrylate monomers, 2 to 5 weight parts of photoinitiators, 1 to 2 weight parts of adhesion promoters, 20 to 60 weight parts of diluents and 0.2 to 2 weight parts of auxiliaries. The two-coating type ultraviolet light curing paint solves the technical problems that the wear-resisting and steel wool friction resistance degrade of the existing ultraviolet light curing paint is low, the vacuum coating variety is single, and the cost is high.

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 relates to a hyperbranched polyester lithium ion battery gel electrolyte and a preparation method thereof. The gel electrolyte is formed by mixed liquor prepared from 5-30 percent by mass of hyperbranched photopolymer resin, 5-25 percent by mass of cross-linking agent, 1-10 percent by mass of initiator, 20-50 percent by mass of plasticizer, 20-50 percent by mass of lithium salt and the like by using a radiation crosslinking method or a heating crosslinking method and the like. In the invention, the hyperbranched structure of a hyperbranched polyester can effectively prevent chain segments from being crystallized, whereas the molecular conformation similar to a spheric shape can increase the free volume of the polyester; bigger space and fewer -COO- and ether bond structures among branch points of the hyperbranched polyester have very strong interreaction with oxygen in the carbonic ester plasticizer, and therefore, a large amount of liquid electrolyte can be contained, and the gel electrolyte has very high dissolving capacity on salts, which is beneficial to ionic migration and the increase of electrical conductivity so that a lithium ion battery prepared from the hyperbranched polyester lithium ion battery gel electrolyte has long service life, small internal resistance, better specific energy, simple preparation process and no pollution.

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.

Photochromic materials and photochromic compositions and articles including the photochromic materials are disclosed. The photochromic materials may be the reaction product of a hyperbranched polyester polyol having, on average, at least two reactive hydroxyl groups, and at least one photochromic indeno-fused naphthopyran.

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 a hyperbranched polyester resin pigment dispersant as well as a preparation method thereof, color paste and application of color paste. The hyperbranched polyester resin pigment dispersant is a dendritic hyperbranched polyester with a hydroxyl functional group and a 3D structure, wherein number-average molecular weight of the polyester is 1500-20000, and solid content of the polyester is 20%-90%; the hyperbranched polyester resin pigment dispersant is prepared by reacting acid anhydride with hyperbranched polyester, and then reacting with a compound with a monoepoxy functional group at one end and a hydrophobic long-carbon chain at the other end. The long-chain alkyl / acryl introduced by the dispersant is just as a structure of a fish hook, has good compatibility with a paint main body resin molecular chain, and can lower re-flocculation or aggregation possibility of a dispersion system. Paint or color paste adopting the dispersant disclosed by the invention can reach fineness requirements by grinding within short time; the paint or the color paste is applied to finished product paint, so that the finished product paint has high hardness, and good thermal storage and room-temperature storage stability, and finished product paint precipitation and flooding can be effectively relieved.

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 relates to a shape memory epoxy resin and a preparation method thereof. The shape memory epoxy resin comprises epoxy resin, a curing agent and hyperbranched polyester at a weight part ratio of 100:(8-80):(3-20). The preparation method comprises the following steps: firstly mixing the epoxy resin and hyperbranched polyester, then adding the curing agent, evenly mixing, then injecting into a die, curing at 50 DEG C-170 DEG C for 1h-6h, then curing at 80 DEG C-200 DEG C for 0h-6h, cooling to room temperature and demoulding, so as to obtain the shape memory epoxy resin. The shape memory epoxy resin has high tenacity within the secondary shape forming temperature range, and has no difference in heat resistance property compared with the corresponding type of shape memory epoxy resin without hyperbranched polyester, is difficult to crack and damage, and has great values on the engineering application aspect of a shape memory epoxy resin-based composite material.

The invention discloses a modified hyperbranched polyester urethane acrylate ultraviolet-cured coating. The coating comprises the following chemical components in percentage by weight: 40 to 85% of modified hyperbranched polyester urethane acrylate, 10 to 55% of active monomer diluents, 0.5 to 5% of photoinitiator, 0.1 to 2% of flatting agent, and 0.1 to 5% of adhesion promoter; all raw materials account for 100% in percentage by weight; and the modified hyperbranched polyester urethane acrylate is long-chain-acid modified hyperbranched polyester urethane acrylate. The invention also discloses a preparation method of the modified hyperbranched polyester urethane acrylate ultraviolet-cured coating. The coating has the characteristics of being low in viscosity, high in flexibility, high in adhesive force, etc.

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 present invention provides an ophthalmic composition comprising a hyperbranched polyester. The ophthalmic compositions may also comprise carbonic anhydrase inhibitors, wherein the hyperbranched polyester increases the aqueous solubility of the carbonic anhydrase inhibitor, and increases corneal permeation of the active agent. The ophthalmic compositions may also comprise non-ionic surfactants, such as PEG, Polysorbate, HPMC or HEC, and beta-blockers, such as Carteolol, Levobunolol, Betaxolol, Metipranolol, Timolol or Propranolol. The concentration of the hyperbranched polyester in the ophthalmic formulation should be less than or equal to 4% (w / v) in order to avoid any cytotoxic effects on human corneal cells and thus the eye irritation.