1575 results about "Hyperbranched polymers" patented technology

Radiation curable compositions with a polymeric co-initiator are disclosed comprising a dendritic polymer core with at least one co-initiating functional group as an end group. The dendritic polymeric core is preferably a hyperbranched polymer. Industrial applications include varnishes, lacquers and printing inks. The polymeric co-initiator is especially useful in radiation curable inkjet ink.

Novel powder coating compositions containing reactive hyperbranched polymers are disclosed and claimed. Preferred embodiments include powder coating compositions formed from hyperbranched polyesters having terminal hydroxy, carboxy, epoxy, and isocyanate groups. Preferred hyperbranched polyesters are formed from alpha , alpha -bis-(hydroxymethyl)-propionic acid, which act either as crosslinkers, adhesion promotors, or flow and leveling agents. A process for the synthesis of powder coating compositions is also disclosed which involves (a) self condensation of one or more of the multifunctional monomers to form the hyperbranched polymer, optionally, in the presence of suitable reactive end-capping moieties which are described herein; (b) melt blending of the hyperbranched polymer with suitable amounts of one or more of polyesters, epoxy resins, blocked urethane resins, or acrylic resins, a crosslinker, and one or more of suitable additional ingredients including degassers or flow and leveling agents, to form a flake; and (c) grinding and sieving of the flake to form the powder coating composition. These compositions exhibit improved flow and curing properties. These compositions can therefore be formed into thin films and can be cured at low temperatures to form smooth surfaces. Additionally, these films are hard and exhibit enhanced impact resistance properties than the conventional polyester resins. Thus, these powder coating compositions find utilities in automotive, packaging, and appliances.

The present invention is directed to a process of atom (or group) transfer radical polymerization for the synthesis of novel homopolymer or a block or graft copolymer, optionally containing at least one polar group, with well defined molecular architecture and narrow polydipersity index, in the presence of an initiating system comprising (i) an initiator having a radically transferrable atom or group, (ii) a transition metal compound, and (iii) a ligand, the present invention is also directed to the synthesis of a macromolecule having at least two halogen groups which can be used as a macroinitiator component (i) to subsequently form a block or graft copolymer by an atom or group transfer radical polymerization process; the present invention is also directed to a process of atom or group transfer radical polymerization for the synthesis of a branched or hyperbranched polymer; in addition, the present invention is directed to a process of atom or group transfer radical polymerization for the synthesis of a macroinitiator which can subsequently be used to produce a block or graft copolymer.

Conductive polymers having a star structure comprising a central core with multiple attachment sites and conjugated charge transporting arms radiating therefrom. The cores are derived from hyperbranched polymers, dendrimers, or other molecules with a multiplicity of attachment sites. The arms are derived from conjugated oligomers and polymers such as polythiophene, polyaniline or polyphenylene. The subject polymers allow assembly of the macromolecules in all three dimensions in the solid state. A ramification of the compact assembly is the realization of highly reflective, smooth coatings simply applied from solution. A preferred embodiment having a 1,3,5 hyperbranched polyphenylene core and poly (3-hexylthiophene) arms provides lustrous reflective gold coatings.

Photographically useful materials are disclosed comprising a hyperbranched polymer segment and multiple pendant photographically useful groups. Such materials may be prepared by forming an active hyperbranched polymer segment with multiple functionalized end group sites, and reacting the active hyperbranched polymer segment with an active compound comprising a photographically useful group to form a hyperbranched polymer ended with photographically useful groups. The hyperbranched segment may comprise any kind of polymer segment with hyperbranched architecture, and the active end groups may comprise any kind of reactive site. The active hyperbranched polymer may comprise any kind of other functional groups which are located in either backbone or the ends. The hyperbranched polymers containing photographically useful groups obtained in accordance with the invention are particularly advantageous in that they enable polymer structures comprising components exhibiting different photographically useful properties, while maintaining relatively low intrinsic viscosities compared to non-hyperbranched polymers containing photographically useful groups of similar chemical compositions. Additionally, the hyperbranched polymers are advantageous with respect to dendrimer type polymers in that a wide variety of hyperbranched polymer compositions may be synthesized in accordance with commercially acceptable processes.

The invention discloses a preparation method of modified cellulose adsorbents. The preparation method comprises the following steps: (1) activating cellulose in alkaline aqueous solution to obtain activated cellulose; (2) reacting the activated cellulose with epoxy chloropropane to obtain epoxy cellulose; (3) reacting the epoxy cellulose with an oxidizing agent to obtain epoxy dialdehyde oxidized cellulose; (4) reacting cyclodextrin with epoxy dialdehyde oxidized cellulose to obtain cyclodextrin grafted modified cellulose; and (5) reacting the cyclodextrin grafted modified cellulose with amino-terminated hyperbranched polymer to obtain the modified cellulose adsorbents. The raw material source is wide, the price is low, and the environment-friendly effect is achieved; the preparation method is simple, the reaction condition is mild, the equipment requirement is low and scale production is facilitated; and the prepared adsorbent has stable performance and broad-spectrum adsorption capacity for heavy metal ions, dyes and other organic matters and is environment-friendly, the cellulose additional value is remarkably promoted, and good economic and social benefits are achieved.

The invention discloses a crosslinking hyper branched polymer composite nanofiltration membrane as well as the preparation method thereof. The crosslinking hyper branched polymer composite nanofiltration membrane is prepared by taking an ultrafiltration membrane as a basement membrane and crosslinking hyper branched polymer as a selecting layer through hyper branched polymer and the interfacial polymerization of polybasic acid, polybasic acyl chloride, polybasic anhydride and polybasic amine; and the interfacial polymerization takes the mixed solution of water and ethanol as the water phase and n-hexane, n-heptane or n-octane as the organic phase. As the hyper branched polymer has the spheroidal structure, a plurality of nano-voids exist in the interior of the molecule, so as to enable the selecting layer of the crosslinking hyper branched polymer composite nanofiltration membrane to be looser, and leads the nanofiltration membrane to maintain high flux and retention rate under the lower operating pressure. The nanofiltration membrane can be used in the fields of medicament, foodstuff, environmental protection, etc. The composite nanofiltration membrane is applicable to the separation and the condensation of high valence ions, low valence ions, neutral particles, drugs, food additives, etc.

The present invention deals with a process for treating a polyimide comprising exposing said polyimide to a compound selected from the group consisting of dendrimers, hyperbranched polymers and mixtures thereof. The polyimide may be in the form of a membrane and the membrane, after treatment according to the process of the invention, may be suitable for use in a membrane-based separation technique, for example gas separation, filtration, microfiltration, ultrafiltration, reverse osmosis or pervaporation. The membrane may for example be suitable for separation of gas and hydrocarbon mixtures including mixtures of H2/N2, H2/CO2, He/N2, CO2/CH4, and C2-C4 hydrocarbon mixtures.

An anode material with lithium-alloying particles contained within a porous support matrix is provided. The porous support matrix preferably has a porosity of between 5 and 80% afforded by porosity channels and expansion accommodation pores, and is electrically conductive. More preferably the support matrix has a porosity of between 10 and 50%. The support matrix is made from an organic polymer, an inorganic ceramic or a hybrid mixture of organic polymer and inorganic ceramic. The organic polymer support matrix and can be made from a rod-coil polymer, a hyperbranched polymer, UV cross-linked polymer, heat cross-linked polymer or combination thereof. An inorganic ceramic support matrix can be made from at least one group IV-VI transition metal compound, with the compound being a nitride, carbide, oxide or combination thereof. The lithium-alloying particles are preferably nanoparticles with a mean linear dimension of between 5 and 500 nanometers, and more preferably have a mean linear dimension of between 5 and 50 nanometers.

The invention discloses a polyamide and amine hybridized nanosilicon dioxide hyperbranched polymer and a preparation method thereof. The preparation method of the polymer comprises the following steps of firstly, modifying the surface of nanosilicon dioxide by using a coupling agent; then, carrying out Michael addition reaction and amidation reaction on the modified nanosilicon dioxide by using ethylenediamine and methyl acrylate; finally, carrying out functional modification by using allyl glycidyl ether to obtain a functional polyamide and amine hybridized nanosilicon dioxide monomer, and initiating polymerization reaction on the functional polyamide and amine hybridized nanosilicon dioxide monomer, acrylamide, acrylic acid and a heat-resistant and salt-tolerant monomer by using a redox initiator or azobis(isobutylamidine) initiator. The hyperbranched polymer has a network structure with a polyamide and amine hybridized nanosilicon dioxide unit as a center, has excellent shear resistance, strong thickening property, heat resistance and salt tolerance, and is wide in adaptability and capable of being used as an oil displacement agent for increasing the recovery rate of raw oil in an oil field environment with a high mineralization degree and a wide temperature range; the preparation method of the polyamide and amine hybridized nanosilicon dioxide hyperbranched polymer is reliable in principle, simple and convenient to operate and wide in application prospect.

The invention relates to high-ionic conductivity electrolyte compositions. The invention particularly relates to high-ionic conductivity electrolyte compositions of semi-interpenetrating polymer networks and their nanocomposites as quasi-solid/solid electrolyte matrix for energy generation, storage and delivery devices, in particular for hybrid solar cells, rechargeable batteries, capacitors, electrochemical systems and flexible devices. The binary or ternary component semi-interpenetrating polymer network electrolyte composition comprises: a) a polymer network with polyether backbone (component I); b) a low molecular weight linear, branched, hyper-branched polymer or any binary combination of such polymers with preferably non-reactive end groups (component-ll and/or component-Ill, for formation of ternary semi-IPN system); c) an electrolyte salt and/or a redox pair, and optionally d) a bare or surface modified nanostructured material to form a nanocomposite.

The invention discloses a method for modifying epoxy resin through amino-terminated hyperbranched polymer-grafted graphene oxide. The method comprises the following steps: preparing graphite oxide from flake graphite utilized as a raw material by adopting a Hummers oxidation method, adding the graphite oxide into a beaker, adding distilled water and forming a graphene oxide mixed solution by virtue of ultrasonic waves; stirring for dissolving triethylene tetramine in N,N-dimethylformamide, raising the temperature to 55-65 DEG C, dropwise adding a mixed solution of methyl methacrylate and methanol, continuously raising the temperature to 80-120 DEG C and reacting for 6-10 hours to get an amino-terminated hyperbranched polymer; further adding the graphene oxide mixed solution and NaOH, regulating the PH value to be 5-10, performing ultrasonic dispersion for 2-8 hours at the temperature of 80-120 DEG C, evaporating the methanol, cooling to room temperature, adding water to precipitate a product, drying to get the amino-terminated hyperbranched polymer-grafted graphene oxide capable of toughening and modifying the epoxy resin. The method disclosed by the invention is wide in raw material source, simple in preparation process, pollution-free, lower in cost and beneficial to industrial large-scale production.

The invention discloses an all-solid-state composite polymer electrolyte and a preparation method thereof. An adopted polymer matrix is a hyperbranched polymer or a star-like polymer. Different types of lithium salt are added into the polymers, and are compounded with substances such as inorganic fillers (such as nanoparticles, nanofibers), ionic liquid, carbonic ester compounds as well as other linear or branched polymers (such as polyether, polydioxolane, polycaprolactone, polyphosphazene, polyurethane, Makrolon, polyamide, polyimide, polyester, polyvinylidene fluoride, polytetrafluoroethylene, polyhexafluoropropylene or corresponding segmented copolymers or graft polymers thereof and the like) respectively, a film can be formed through a solution pouring process, the all-solid-state composite polymer electrolyte is prepared, and the room-temperature conductivity of the electrolyte is approximate to 10<-4> S/cm. The solid electrolyte has potential applications in electrochemical devices such as secondary lithium ion batteries, supercapacitors, electronic sensors, electrochromic devices and the like.

The invention discloses hyperbranched polysiloxane and a preparation method thereof. The hyperbranched polysiloxane contains a phosphaphenanthrene structure and an epoxy group simultaneously. The preparation method comprises the following steps of: mixing distilled water and epoxy group-containing trialkoxysilane uniformly according to a molar ratio, adding a catalyst A slowly and dropwise under the condition of stirring, and performing a reaction to obtain epoxy group-containing hyperbranched polysiloxane; mixing the epoxy group-containing hyperbranched polysiloxane and a certain amount of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; and mixing the mixture and a catalyst B and alcohol solvent, and purifying, filtering and vacuumizing a crude product to obtain the hyperbranched polysiloxane containing the phosphaphenanthrene structure and the epoxy group. The hyperbranched polymer integrates the molecular characteristics of the hyperbranched polysiloxane, the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and the epoxy group, and has the huge application potential in the modification aspect. The preparation method has the characteristics of wide applicability and simpleoperational process.

The invention provides a formaldehyde catching agent. An efficient macromolecular type formaldehyde catching agent is synthesized by performing addition polycondensation reaction on a methyl acrylate monomer and a polyamine compound to generate an amino-group-enriched hyperbranched polymer and adding corresponding auxiliaries. According to the catching agent, formaldehyde is caught by using an amino group of the hyperbranched polymer and film forming fixing is implemented by using a carbon framework of an acrylate type substance; modification is realized by the corresponding various auxiliaries, so that the physical performance and the formaldehyde elimination effect are improved. The formaldehyde catching agent has the characteristics of no toxicity, no volatility and no irritating odor, and secondary harm to a human body is avoided; the formaldehyde catching agent can be limitlessly dissolved in water, is mild in property, free from corrosion, easy to add and spray, high in film forming property and durable.

A novel polymeric initiator is disclosed comprising a dendritic polymer core with at least one initiating functional group as an end group. The dendritic polymeric core is preferably a hyperbranched polymer. The polymeric initiators are useful in radiation curable compositions such as varnishes, lacquers and printing inks and are especially useful in radiation curable inkjet inks.

This invention discloses a method for preparing highly water-soluble carbon nanotubes by grafting modification with hyper branched polymer. The method comprises: purifying carbon nanotubes with a highly oxidative acid to form active groups at the sidewalls and the ends, modifying with polyamine or polyol to form initiating groups at the surfaces, and then reacting between hyper branched polymer and the initiating groups for grafting to form large quantities of carboxyl or amine groups at the surfaces of carbon nanotubes so that carbon nanotubes have high solubility and dispersibility in aqueous solvents. The obtained highly water-soluble carbon nanotubes have improved processability, and can be used in composite materials, hydrogen storage materials, electronics, sensors and biomaterials.

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.

New photoresist compositions are provided that are useful for immersion lithography. Preferred photoresist compositions of the invention comprise one or more materials that can be substantially non-mixable with a resin component of the resist. Further preferred photoresist compositions of the invention comprise 1) Si substitution, 2) fluorine substitution; 3) hyperbranched polymers; and/or 4) polymeric particles. Particularly preferred photoresists of the invention can exhibit reduced leaching of resist materials into an immersion fluid contacting the resist layer during immersion lithography processing.

The invention discloses a preparation method of a chiral fluorescent nanoparticle based on a hyperbranched conjugated polymer. The method is characterized by comprising the following steps of: preparing a hyperbranched polymer containing 9,9-dioctylfluorene and a bithiophene unit into a trichloromethane solution of which the solubility is 1*10<-3> to 1*10<-1> mg/mL; and adding one of (R)-limonene or (S)-limonene into the trichloromethane solution of the copolymer together with methanol, and mixing uniformly to obtain a stable turbid solution, wherein the volume ratio of the (R)-limonene or (S)-limonene to the methanol to the copolymer is (1-8):(8-1):1. In the method, a solvent chiral transfer technology is applied to the preparation of a hyperbranched polymer chiral fluorescent nanoparticle with a hyperbranched polymer, so that the problems of high price of a chiral reagent, complex synthesis steps and the like existing in the conventional method for synthesizing the hyperbranched polymer chiral fluorescent nanoparticle are solved.