44 results about "Condensation polymer" patented technology

The invention provides a mechanochemical depolymerisation process of condensation-type polymers, the process comprising the steps of: (a) providing a mixture comprising a condensation polymer and a cleaving agent suitable to cleave the condensation polymer; and (b) subjecting the mixture to heat and a mechanical shearing force for a period of time to provide a depolymerised product, wherein the mixture is substantially free of a solvent and the heat is sufficient to melt the condensation polymer in the mixture.

The invention belongs to the technical field of lithium battery silicon-oxygen negative electrode materials, and particularly relates to a porous carbon carrier for a lithium battery silicon-oxygen negative electrode and a preparation method, the preparation method comprises the following steps: 1) pretreating raw oil to obtain a low-condensation-degree carbon-rich precursor; 2) performing oxidation crosslinking treatment on the low-condensation-degree carbon-rich precursor to obtain a heavy condensation polymer; 3) carrying out multistage supercritical extraction separation on the heavy condensation polymer to respectively obtain a component A, a component B and a component C, and drying and mixing the component A, the component B and the component C to obtain a carbon carrier precursor; 4, the carbon carrier precursor is subjected to pre-oxidation, etching and carbonization, and the porous carbon carrier for the silicon-oxygen negative electrode is obtained.The prepared porous carbon carrier for the silicon-oxygen negative electrode of the lithium battery has the advantages of being small in density, light in mass, reasonable in pore size distribution, high in specific surface area and excellent in conductivity.

The invention relates to a thiourea-polyamine condensation polymer, an epoxy adhesive and a preparation method of the thiourea-polyamine condensation polymer, and the thiourea-polyamine condensation polymer is obtained by reacting thiourea with 3, 3 '-dimethyl-4, 4'-diaminodicyclohexylmethane. According to the preparation method, thiourea is used for modifying 3, 3 '-dimethyl-4, 4'-diaminodicyclohexylmethane under a proper condition, so that the modified thiourea-polyamine condensation polymer is obtained. The modified thiourea-polyamine polycondensate is simple in preparation process and high in yield. Moreover, the modified thiourea-polyamine polycondensate can be used as a chain extender for preparing an epoxy adhesive, the impact toughness and tensile property of the epoxy adhesive can be remarkably improved, the epoxy adhesive has better heat resistance, and the application field and scene of the epoxy adhesive are expanded.

To provide toner for electrostatic charge image development that improves adhesion between an image and a resin-made recording medium and reduces uneven glossiness of an image.SOLUTION: In toner for electrostatic charge image development of the present invention, a binder resin contains hybrid amorphous polyester. A content of the hybrid amorphous polyester is within a range of 5 to 50 pts.mass based on 100 pts.mass of the binder resin. The hybrid amorphous polyester has an amorphous polyester segment and a vinyl resin segment. The amorphous polyester segment is a condensed polymer of a polyvalent carboxylic acid and polyhydric alcohol. The polyhydric alcohol includes aliphatic polyhydric alcohol. The vinyl resin segment includes a constitutional unit derived from a vinyl monomer, a content of the vinyl resin segment is within a range of 3 to 30 pts.mass based on 100 pts.mass of the amorphous polyester segment.SELECTED DRAWING: Figure 2

1. A method for producing modified latex particles, the particles comprising condensation polymers attached to functional groups on the latex particles, and the method for forming the condensation polymer comprises reacting amino groups present on the latex particles with either (i) at least a first multifunctional compound having at least two functional moieties reactive with the functional groups of the latex, or (ii) at least a first multifunctional compound having at least two functional moieties reactive with the functional groups of the latex, and at least a first amine compound comprising an amino group selected from the group consisting of ammonia, primary, and secondary amines, to form a first condensation polymer reaction product comprising ion exchange sites and a first excess of unreacted functional moieties.

The present application discloses reaction products of polyphosphonate homopolymers and other condensation polymers in an extruder in the presence of a catalyst, methods of making such compounds. Refractory compositions using such compounds, as well as blends comprising such compounds, are also disclosed.

A method for making modified latex particles, wherein the particles comprise condensation polymers bonded to functional groups on the latex particles and the method for forming the condensation polymer comprises reacting the amino groups present on the latex particles with (i) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex, or (ii) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex and at least a first amine compound, comprising amino groups selected from the group consisting of ammonia, a primary and a secondary amine to form a first condensation polymer reaction product comprising ion exchanging sites and a first unreacted excess of functional moieties.

The present invention concerns a process for separating a heterogeneous depolymerization catalyst from monomers, comprising the steps of (a) providing a feed comprising reaction products of a depolymerization reaction wherein condensation polymer is depolymerized into monomers and oligomers, said feed comprising monomers, oligomers, carrier liquid and heterogeneous depolymerization catalyst; and (b) subjecting the feed of step (a) to cross-flow membrane filtration resulting in a permeate and a retentate, wherein the permeate has an increased monomer to heterogeneous depolymerization catalyst ratio and the retentate is enriched in heterogeneous depolymerization catalyst and oligomers, as compared to the feed, wherein no centrifugation step is performed prior to step (b). The present invention further concerns a separation system for separating a heterogeneous depolymerization catalyst from monomers.

A bullet (ammunition projectile) comprising a branched condensation polymer and a filler, wherein the filler is present in an amount from about 10% to 65% by volume of the branched condensation polymer and filler is described. The bullet may be made by heating a mixture comprised of a branched condensation polymer and a filler comprised of a first and second filler having differing densities and differing particle size distribution to form a molten mixture and injecting the molten mixture into a mold to form the ammunition projectile allowing for the tailoring of the characteristics of the bullet for differing applications.

This invention relates to the field of epoxy resin composite materials technology, specifically to an environmentally friendly epoxy resin composite material for the lining of fructose syrup storage and transportation tanks and its preparation method. The composite material of this invention consists of bisphenol F type epoxy resin, a flexible curing agent, nano-antibacterial reinforcing fillers, and additives. The flexible curing agent is a dimer acid-polyetheramine-cashew phenol Mannich base condensation polymer, and the nano-antibacterial reinforcing filler is nano-TiO2@ε-polylysine-silane coupling agent hybrid particles. The composite material of this invention possesses excellent flexibility, acid resistance, antibacterial properties, and low water absorption; it also exhibits strong adhesion, no migration of heavy metals or toxic organic antibacterial agents, and meets food contact safety regulations, making it suitable for the lining protection of fructose syrup storage and transportation tanks.

This invention discloses a ketone-aldehyde-amine condensation polymer for drilling fluids, its preparation method, and its applications, belonging to the field of oilfield chemical technology. The preparation method includes: using water as a solvent, mixing ketone monomers, aldehyde monomers, and amine monomers in a specific molar ratio, and carrying out a condensation polymerization reaction at 60-85 °C for 4-10 h under alkaline conditions (pH 8.0-10.0) and nitrogen protection, followed by neutralization to obtain the product. This method is simple and environmentally friendly. The obtained polymer has a unique molecular structure, exhibiting excellent high-temperature resistance (≥180 °C) and high-salt resistance (salt resistance ≥20%), and high viscosity retention and good stability in high-density potassium formate and other brine drilling fluids. Simultaneously, this polymer possesses excellent shale inhibition and filtration loss reduction capabilities, significantly improving drill cuttings recovery rate and controlling high-temperature, high-pressure filtration loss. The polymer of this invention is particularly suitable for high-temperature, high-salt drilling fluid systems in deep wells, ultra-deep wells, and complex formations, with broad application prospects.

A viscosity modifier for a condensation polymer may include a chain extender comprising at least one reactive monomer and at least one vinyl monomer copolymerizable with the reactive monomer, the chain extender being present in an amount ranging from 15 to 70 wt % of the viscosity modifier; and a non-condensation carrier resin present in an amount ranging from 30 to 85 wt % of the viscosity modifier. Condensation polymer compositions, methods of forming viscosity modifiers, and methods of molding condensation polymer compositions are also provided.

In various examples, methods of forming a polymer (e.g., a condensation polymer including but not limited to a polyester), include the steps of forming a mixture comprising one or more monomer(s), one or more biocatalyst(s), and carbon dioxide. In various examples, the methods are at least partially carried out in sub critical carbon dioxide or supercritical carbon dioxide. In various examples, a polymer is a condensation polymer. In various examples, a fabricated article, which may be a medical article, includes one or more polymer(s).

A molded stator comprising: a stator having a stator core and a coil wound on the stator core; and a molding material covering the stator, wherein the molding material is a cured product of a thermosetting resin composition comprising (A) a saturated polyester resin, (B) an unsaturated polyester resin, (C) an olefinic unsaturated monomer, (D) a thermal polymerization initiator, (E) glass fiber, and (F) an inorganic filler, wherein the (B) unsaturated polyester resin comprises at least a (B-1) unsaturated polyester resin, the (B-1) unsaturated polyester resin being a condensation polymer comprising a mixture of a diol and an unsaturated polybasic acid, and the (B-1) unsaturated polyester resin containing a structure derived from propylene glycol and a structure derived from neopentyl glycol.

To provide a reactor for electrochemical reactions.SOLUTION: The invention consists of device, addition polymerization, condensation polymerization, process with piping, control and procedure. The device is a mechanical design to continuously remove solid deposit, conductive or not, on electrode surface. Besides overcoming the limitation of electrochemical polymer production where the products block the electrode from further operation, the device provides cheaper operation for electrometallurgy to harvest the valuable metals formed on electrode. The novel process allows retrofitting conventional polymer production process by replacing conventional reactor with electrochemical reactor, for low-cost rapid implementation. The novel reactions consist of addition reaction to produce polymers; and intermolecular reaction to produce classes of condensation polymers.SELECTED DRAWING: Figure 7

The invention relates to the technical field of coal water slurry, in particular to a coal water slurry additive which comprises a main dispersant and an auxiliary stabilizer, the main dispersing agent is a polystyrene-maleic anhydride grafted sulfonated acetone-phenol polycondensate, and the auxiliary stabilizer is an oxidation-hydroxymethylation modified compound of lignosulfonate and sodium humate. The coal water slurry additive comprises the main dispersing agent and the auxiliary stabilizer, and the main dispersing agent and the auxiliary stabilizer act together, so that the coal water slurry additive has the advantages that the coal water slurry additive is uniform in dispersion and high in stability; and the action effect of the additive in the coal water slurry is improved. The main dispersing agent is polystyrene-maleic anhydride grafted sulfonated acetone-phenol polycondensate, and sulfonated acetone-phenol polycondensate chain segments: sulfonic acid groups introduced after phenol is sulfonated can generate strong negative charges through ionization, and the strong negative charges and positive charges on the surfaces of pulverized coal particles form electrostatic repulsion, so that the agglomeration force among the particles is remarkably reduced; a net structure formed by crosslinking acetone and formaldehyde endows molecular chains with certain rigidity, so that the molecular chains form a stable adsorption layer on the surfaces of particles.

A bullet (ammunition projectile) comprising a branched condensation polymer and a filler, wherein the filler is present in an amount from about 10% to 65% by volume of the branched condensation polymer and filler is described. The bullet may be made by heating a mixture comprised of a branched condensation polymer and a filler comprised of a first and second filler having differing densities and differing particle size distribution to form a molten mixture and injecting the molten mixture into a mold to form the ammunition projectile allowing for the tailoring of the characteristics of the bullet for differing applications.

A method for making modified latex particles, wherein the particles comprise condensation polymers bonded to functional groups on the latex particles and the method for forming the condensation polymer comprises reacting the amino groups present on the latex particles with (i) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex, or (ii) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex and at least a first amine compound, comprising amino groups selected from the group consisting of ammonia, a primary and a secondary amine to form a first condensation polymer reaction product comprising ion exchanging sites and a first unreacted excess of functional moieties.

A viscosity modifier for a condensation polymer may include a chain extender obtained from a reaction between at least one reactive monomer and at least one vinyl monomer copolymerizable with the reactive monomer, the chain extender comprising at least one reactive group and being present in an amount ranging from 50 to 90 wt % of the viscosity modifier; and a non-condensation carrier resin comprising from greater than 2.5 wt % to 10 wt % of units derived from a reactive monomer in the carrier resin, the non-condensation carrier resin present in an amount ranging from 10 to 50 wt % of the viscosity modifier. Condensation polymer compositions, methods of forming viscosity modifiers, and methods of molding condensation polymer compositions are also provided.

The invention provides a method for preparing sulfonated polyetheretherketone, belonging to the technical field of condensation polymers of ketones and phenols. The preparation method comprises preparing modified polyetheretherketone, pretreatment, sulfonation, and post-treatment. The method for preparing the modified polyetheretherketone comprises the following steps: adding 4,4'-difluorobenzophenone, hydroquinone, and diphenyl sulfone to a reaction kettle under nitrogen protection; heating the kettle to 170-190°C; adding a catalyst; maintaining the temperature for 0.8-1.2 hours; then dropwise adding a PEG-400 solution at 260-290°C for 1.5-2.5 hours; reacting the mixture at 310-330°C for 1.5-3.5 hours after the dropwise addition is completed; cooling and crystallizing the mixture after the reaction is completed; and washing away the solvent and inorganic salts to obtain the modified polyetheretherketone. The sulfonated polyetheretherketone of the invention has a sulfonation degree of 69.6-75.1%, good sulfonation uniformity, and a deviation of 2.37-2.52%.

The present invention generally relates to a transient copolymer that can undergo chemical or biological decomposition over a predetermined period. More specifically, the present invention relates to a transient copolymer, and preparation methods thereof, comprising at least two different macromers, wherein a first macromer is a polyester; wherein a second macromer is a condensation polymer; and wherein the molar ratio of the first macromer to the second macromer is more than 4:1. The present invention further relates to an article comprising the transient copolymer and the use of a transient copolymer for preparing an article.

The invention provides a high-strength transparent polymer brush coating material as well as a preparation method and application thereof, and belongs to the technical field of functional protection materials. The preparation method comprises the following steps: mixing a silane raw material containing an ATRP (Atom Transfer Radical Polymerization) initiator, small molecular acid, water and an alcohol solvent, carrying out hydrolytic condensation reaction, mixing an obtained initiator condensation polymer, an amine curing agent and a diluent to obtain an initiator coating, coating the surface of a base material with the initiator coating, and curing to obtain an initiator coating on the surface of the base material. And finally, immersing the base material containing the initiator coating into a reaction solution containing a hydrophilic monomer, and carrying out ATRP (Atom Transfer Radical Polymerization) reaction to obtain the high-strength transparent polymer brush coating material. The thickness of the obtained polymer brush layer coating can reach 30 microns, the polymer brush layer coating has excellent transparency, toughness, hydrophilicity, antifouling property and wear resistance, the coating can keep the ultralow friction coefficient of 0.0036 for 10000 cycles under the load of 1N, and the coating can also keep the low friction coefficient of 2000 cycles under the load of 2N.

The application belongs to the technical field of sodium ion batteries, and particularly relates to a polymer dispersant of a positive electrode material of a sodium ion battery and a sodium ion battery, which comprises, by mass fraction, 10-40 parts of acrylonitrile-acrylate copolymer A, 50-85 parts of amine-containing condensation polymer B and 3-10 parts of small molecule carboxylic acid additive C; the polymer dispersant exists in the form of an N-methylpyrrolidone solution, has a solid content of 20-40 wt%, and the solid content is the sum of the mass of the acrylonitrile-acrylate copolymer A, the amine-containing condensation polymer B and the small molecule carboxylic acid additive C, which accounts for the percentage of the total weight of the polymer dispersant; the combination of the above components can effectively improve the solid content under the premise that the viscosity of the positive electrode main material remains unchanged, and is not prone to gelation, so as to facilitate subsequent coating and rolling, improve the compaction density of the sodium battery, and effectively improve the production efficiency of the sodium battery.

To provide a method for preparing a glass fiber-nylon composition that can effectively improve the flame retardant properties of glass fiber-nylon composites.SOLUTION: The preparation of the composition includes the steps of: (1) condensing and polymerizing a compound represented by formula (I) in the presence of an inorganic acid and acetic anhydride to obtain a partially condensed polymer in which a portion forms a high-molecular-weight polymer; (2) reacting the partially condensed polymer with a rare earth inorganic salt to obtain a phosphonate; (3) mixing the phosphonate, an organic silicone flame retardant, and an inorganic silicone synergist to obtain a flame-retardant composition; (4) melt-extruding a raw material containing a first nylon, the flame-retardant composition, a lubricant, and an antioxidant in an extruder to obtain a flame-retardant masterbatch; and (5) melt-extruding a raw material containing a second nylon, glass fibers, the flame-retardant masterbatch, and additives in an extruder to obtain a composition.SELECTED DRAWING: Figure 1

The present invention provides an aromatic condensation biopolymer or terpolymer compound having a weight average molecular weight of 1,500 to 30,000 and formed by a condensation reaction with a heteroaromatic compound, a cyclopentanone derivative, and an aromatic compound under an acid catalyst condition. Also provided is an antireflective resist underlayer film composition comprising: (i) the aromatic condensation biopolymer or terpolymer compound or a polymer compound blend comprising same; and (ii) an organic solvent.

A bullet (ammunition projectile) comprising a branched condensation polymer and a filler, wherein the filler is present in an amount from about 10% to 65% by volume of the branched condensation polymer and filler is described. The bullet may be made by heating a mixture comprised of a branched condensation polymer and a filler comprised of a first and second filler having differing densities and differing particle size distribution to form a molten mixture and injecting the molten mixture into a mold to form the ammunition projectile allowing for the tailoring of the characteristics of the bullet for differing applications.

The invention belongs to the technical field of lithium iron phosphate batteries, and particularly relates to a lithium iron phosphate precursor slurry additive and carbon-coated lithium iron phosphate. The main component polycondensate A is rich in amino groups, hydroxyl groups, benzene rings and other functional groups capable of forming strong intermolecular force with lithium iron phosphate, and can be adsorbed on the surfaces of lithium iron phosphate particles during slurry grinding, at the moment, polyether side chains rich in the polycondensate A form a hydrated protective layer, flocculent precipitation between two lithium iron phosphate particles is prevented, and the lithium iron phosphate particles are prevented from being separated from each other. Therefore, uniform particle size distribution of the lithium iron phosphate is ensured, and the viscosity of the slurry is greatly reduced; the compound component ether amine polymer B can also be strongly adsorbed on the surface of the lithium iron phosphate to assist the main component polycondensate A in reducing the viscosity of the slurry; meanwhile, the compound C is an organic salt, so that the electrostatic repulsion on the surface of the lithium iron phosphate can be enhanced, and outstanding effects on reducing the viscosity of the slurry and shortening the grinding time are achieved.

This invention relates to the field of concrete admixtures, and more particularly to an ammonium-based condensation polymer water-reducing agent adapted to high-alumina phase admixtures and its preparation method. The water-reducing agent comprises a polycarboxylic acid copolymer containing carboxyl and ammonium groups. The copolymer is prepared by free radical copolymerization of the following monomers: an allyl-containing ammonium salt monomer, methyl allyl polyoxyethylene ether, and acrylic acid; wherein the molar amount of acrylic acid is greater than the molar amount of methyl allyl polyoxyethylene ether to introduce abundant carboxyl groups into the main chain; the allyl-containing ammonium salt monomer can introduce ammonium functional groups into the main chain. This invention uses an excess of acrylic acid in the monomer molar ratio, and employs a three-way independent nitrogen pre-pass combined with a delayed initiator dripping process to effectively eliminate oxygen inhibition of polymerization. The monomer conversion rate reaches over 92%, the process conditions are mild, the cost is low, and the water-reducing rate is high. It can be directly transferred from laboratory to industrial scale, production is safe and reliable, and it has good industrialization prospects.

System (1) for providing an even distribution of waste heat in a battery set comprising: the battery pack; at least one cooling plate located between two cells (2) of the battery pack extends, wherein the cooling plate has an “L” shape, comprising a lower, longitudinally arranged coolant reservoir (6) section (8) and an upper section (5) arranged along the cell height; a coolant reservoir (6) coupled to the cooling plate via a deformable thermal paste (4) so ​​that heat can be conducted between them, wherein the coolant reservoir (6) contains a coolant flow in the form of a liquid or a gas; a support structure (7) between the battery pack and the coolant reservoir (6); and wherein the deformable thermal paste (4) in the form of a liquid and / or a gel can be placed within the support structure and is configured to fill the space between the coolant reservoir (6) and each cell (2) of the to be fluid in the battery pack, so that there is constant thermal contact between an entire lower surface of each cell (2) of the battery pack and an upper side of the coolant reservoir (6), and wherein the deformable thermal paste (4) maintains constant thermal contact by cross-linking, which reduces the fluidity of the deformable thermal paste (4) and provides an even distribution of waste heat by dissipating the waste heat from each of the cells (2) to the coolant reservoir (6), wherein the deformable thermal paste (4) comprises a cross-linked condensation polymer, wherein the deformable thermal paste (4) is part of a formulation, wherein the formulation comprises polydimethylsiloxane, boron nitride, melamine, a processing aid and a ceramic, and the formulation includes: from 0.1 to 50 wt% boron nitride; from 0.05 to 0.10 wt% melamine; from 0.05 to 0.1 wt.% processing aid and the combined ceramic materials; and the remaining residue is polydimethylsiloxane.