34 results about "Condensation polymer" patented technology

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.

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.

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.

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 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

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.

An end capped condensation polymer may be formed by heating a condensation polymer in the presence of an end capping compound to form cleaved condensation polymer reacting at least a portion of the cleaved condensation polymer with the end capping compound to form the end capped condensation polymer. The end capped condensation polymers may be used to form additive manufactured articles having high solids loading and improved processing due to improved rheological behavior.

The present invention relates to a method for recovering aromatic dicarboxylic acids from a waste gas stream of a depolymerization reaction of a condensation polymer, the waste gas stream containing a metal carboxylate of the aromatic dicarboxylic acid to be recovered, wherein a first aromatic dicarboxylic acid constituting the basis of the condensation polymer is precipitated from the waste gas stream at a first pH value, and after subsequent solid-liquid separation, a further aromatic dicarboxylic acid constituting the basis of the condensation polymer is precipitated from the liquid phase obtained by solid-liquid separation at a second pH value lower than the first pH value.

The present invention provides an admixture for hydraulic compositions that enables a reduction in the mixing time required to obtain a predetermined fluidity of the hydraulic composition, and a hydraulic composition that enables a reduction in the mixing time required to obtain a predetermined fluidity. [Solution] An admixture for hydraulic compositions containing the following components (A) and (B). (A) Component: A formaldehyde condensation polymer comprising a monomer unit (a1) having a polyalkylene oxy group on the aromatic ring, a monomer unit (a2) having a carboxylic acid group and / or a salt thereof on the aromatic ring, or a monomer unit (a3) ​​having a phosphate group and / or a salt thereof on the aromatic ring. (B) Components: One or more selected from the following components (B1) and (B2). (B1) Components: One or more selected from alkyl or alkenyl sulfates, polyoxyalkylene alkyl or alkenyl ether sulfates, and salts thereof. (B2) Ingredients: Rosin acid and / or its salt

Described is a method of depolymerizing a condensation polymer in a carrier liquid. The method comprises the steps of providing a reaction mixture of a carrier liquid with a solid condensation polymer dispersed therein in a reactor vessel, the reaction mixture having a free surface; providing a means for measuring the level of the free surface of the reaction mixture in the reactor vessel; subjecting the condensation polymer in the carrier liquid to a depolymerization reaction to produce monomers and oligomers thereof in the carrier liquid; measuring the level of the free surface of the reaction mixture at regular time intervals or continuously during the depolymerization reaction to determine a free surface level profile as a function of reaction time, said free surface level profile showing the subsequent phases of (i) an optional decline of the free surface level, (ii) a rise of the free surface level and (iii) a stabilization of the free surface level as a function of reaction time; and continuing the depolymerization reaction until at least the onset of phase (iii). A reactor system is also described.

The present invention discloses black tea-birchleaf pear leaf processing craft tea, and relates to the technical field of craft tea preparation, and the black tea-birchleaf pear leaf processing craft tea is prepared by compounding a black tea base material and a birchleaf pear leaf component according to a mass ratio of 7: 3-9: 1, the black tea-birchleaf pear leaf processing technology tea contains a tea polyphenol-birchleaf pear tannin condensation polymer with the molecular weight of 1000-5000 of the black tea-birchleaf pear leaf processing technology tea Da. The mass percentage of the tea polyphenol-birchleaf pear tannin condensation polymer in the total soluble polyphenol is greater than or equal to 40%; according to the black tea-birchleaf pear leaf processing technology tea, deep fusion of the black tea and the birchleaf pear leaves in flavor, taste and function is successfully realized by regulating and controlling enzyme activity of the birchleaf pear leaves and combining a synergistic biotransformation technology of the black tea and the birchleaf pear leaves, and the obtained black tea-birchleaf pear leaf processing technology tea not only effectively reduces common astringency and astringency in traditional composite tea, but also improves sweet aftertaste and mellowness; the herbal faint scent and the stale fragrance of the dark green tea are coordinated and fused to form a unique and pleasant fragrance characteristic, and meanwhile, tea soup is stable in color and luster, clear and transparent, and turbid or browning caused by non-controlled oxidation is avoided.

A method for selective extraction of lithium from geothermal brines using host-guest complexes of host molecules such as calixarene, dendrimeric polymers, hyper-branched polymers, and / or acid-catalyzed resins complexed with synergists such as organic acids, condensation polymers, olefin / maleic anhydride copolymers, and / or chelants.

Described is a method of depolymerizing a condensation polymer in a carrier liquid. The method comprises the steps of providing a reaction mixture of a carrier liquid with a solid condensation polymer dispersed therein in a reactor vessel, the reaction mixture having a free surface; providing a means for measuring the level of the free surface of the reaction mixture in the reactor vessel; subjecting the condensation polymer in the carrier liquid to a depolymerization reaction to produce monomers and oligomers thereof in the carrier liquid; measuring the level of the free surface of the reaction mixture at regular time intervals or continuously during the depolymerization reaction to determine a free surface level profile as a function of reaction time, said free surface level profile showing the subsequent phases of (i) an optional decline of the free surface level, (ii) a rise of the free surface level and (iii) a stabilization of the free surface level as a function of reaction time; and continuing the depolymerization reaction until at least the onset of phase (iii). A reactor system is also described.

This disclosure relates to polyolefin compositions comprising polyamide condensation polymers of C32-C44 dimer dioic acids and C2-C44 aliphatic diamines. The polyamide condensation polymers may be used in a range of concentrations with additional additives. The use of the condensation polymers described herein in polyolefin compositions helps prevent surface defects when the polyolefin compositions are processed into final products.

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.