89 results about "Synthetic copolymer" patented technology

Well treatment fluids and methods of treating high temperature subterranean formations of up to about 500° F. (260° C.) are provided. The well treatment fluids and methods utilize a high molecular weight synthetic copolymer and a pH buffer than maintains a pH in a range of about 4.5 to about 5.25 for the fluids. The high molecular weight synthetic copolymer is derived from acrylamide, acrylamidomethylpropanesulfonic acid, and vinyl phosphonates. The well treatment fluids may be energized or foamed.

A personal care composition comprising:

• • a) a synthetic random copolymer having a net positive charge comprising;
    • i.) a nonionic monomer unit of the following formula:

The invention relates to a preparation method of a segmented copolymer material P(MMA-co-DMAEMA)-b-PPEGMA with temperature and pH (Potential of Hydrogen) sensitivity. According to the method, a copolymer poly(methyl methacrylate-co-dimethylaminoethyl methacrylate) is synthesized by adopting a reversible addition-fragmentation chain transfer polymerization method firstly; the synthesized poly(methyl methacrylate-co-dimethylaminoethyl methacrylate) as a macromolecular chain transfer agent is subjected to RAFT (Reversible Additive Fragment Transfer) polymerization with polyethylene glycol methyl ether methacrylate, so as to obtain the segmented copolymer material P(MMA-co-DMAEMA)-b-PPEGMA with the temperature and pH sensitivity. The method provided by the invention has the characteristics of simplicity and convenience, high preparation yield, no pollution to environment and the like; the prepared polymer material has high functionality and narrow molecular weight distribution, can be applied to organic dye adsorption and heavy metal adsorption, and medicine fields including in-vivo transportation of difficultly-soluble anti-cancer medicines and the like.

Compositions and methods of treating high temperature subterranean formations of up to about 500° F. (260° C.) are provided. The compositions and methods utilize a high molecular weight synthetic copolymer and a pH buffer than maintains a pH in a range of about 4.5 to about 5.25 for the compositions. The high molecular weight synthetic copolymer is derived from acrylamide, acrylamidomethylpropanesulfonic acid, and vinyl phosphonate,

The invention provides a colorful coating. The colorful coating comprises the following components in percentage by mass: 50-55% of film forming matter, 2-6% of water-based color paste, 10-16% of accessory ingredients and 35-40% of deionized water. According to the film forming matter, synthetic copolymer emulsion is used as a film forming matter of the coating. The accessory ingredients comprise the following components in parts by weight: 0.2-0.4 part of dispersing agent, 2-5 parts of film forming additive, 4-6 parts of antifreezing agent, 0.1-0.2 part of antiseptic and antimildew agent, 2-3 parts of thickening agent, 0.1-0.3 part of defoaming agent, 0.2-0.6 part of fragrance enhancer and 0.2-0.6 part of thixotropic agent. The colorful coating is water-based coating; the coating has the paint characteristic and is free of toxicity, non-combustible and slight in fragrance, so that coating is good in safety during storing, transporting and using, free of pollution to the environment during construction and free of fire danger; the dried coating is tough, durable, wearable and anti-scratch; and meanwhile, the coating has resistance to washing with ethyl alcohol, detergent and water.

A method of reducing fluid loss from a wellbore that includes emplacing a fluid loss pill in the wellbore, the fluid loss pill comprising: a base fluid; a hydratable or solvatable synthetic copolymer having at least one crosslinkable comonomer; and a crosslinking agent is disclosed.

Provided are a super absorbent resin with a high absorbent velocity and a preparation method. A polymer and monomer aqueous solution composed of, by weight, 2-10 wt% of PVA, 18-26 wt% of PAAS and 3-9 wt% of AMPS is heated and dissolved. Copolymer gel is synthesized through electron beam radiation crosslinking and grafting. The copolymer gel is then subjected to swelling and immersion cleaning by an immersion cleaning liquid, and then subjected to extraction freezing and freeze-drying to obtain a super absorbent resin. The pH value, normal saline absorbent amount and centrifugal preservation amount of the super absorbent resin have reached international level, and the super absorbent resin is remarkably superior to famous super absorbent resin products (P is less than 0.01) at home and abroad especially in the absorbent amount and the absorbent velocity of triple-distilled water and is in international advanced level. The super absorbent resin has advantages of simple technology, good biocompatibility and safe usage. The super absorbent resin can be widely used in a plurality of fields of medical and health supplies such as uracratia mattresses, infant diapers, woman sanitary napkins and the like, water retention and moisture preservation of agriculture and forestry and the like. The super absorbent resin has great application and development values.

The invention provides a method for preparing nano-structure aniline-co-pyrrole copolymer microsphere, belongs to the technical field of high polymer materials, and solves the problems of impure obtained polymer, complicated post-processing process, environmental pollution of the used solvent, difficult industrial production and the like in the prior polymerizing method for preparing the nano-structure conductive polymer microsphere produces due to the adding of an extra template or massive additives. The copolymer is prepared by changing medium types of polymerization, selecting aniline or N-ethyl aniline and pyrrole as monomers and implementing a static chemical oxidation polymerization method. The method can prepare copolymer microspheres of between 400 nanometers and 4.4 microns. The method has the characteristics of simple operation, high yield and low cost. The prepared copolymer microspheres have excellent characteristics of nano materials. Furthermore, as an aqueous system, the method, which avoids organic solvent, is a green method for synthesizing the copolymer microspheres. The invention provides a new approach for preparation of the nano-structure polymer microspheres.

The invention discloses an electrostatic spinning nanofiber membrane. Acrylic ester, acrylic acid and polyethylene glycol methacrylate are polymerized into a copolymer. Then, a metal salt solvent is added to the copolymer to prepare a spinning solution, and the spinning solution is injected into an electrostatic spinning device to carry out electrostatic spinning. According to the nanofiber membrane, a preparation method and application, under the precondition of not obviously influencing nanofiber surface morphology, the breaking tenacity of the nanofiber membrane is effectively increased byone to two times; when the amount of an added copper chloride substance is 10% of that of an acrylic acid substance in the copolymer, the mechanical property of the nanofiber membrane is the best, thebreaking tenacity of the nanofiber membrane is 35.12 MPa, and the breaking elongation rate is 26.91%.

The invention discloses a method for preparing an AA/AM/MAH-beta-CD ternary oil-displacing agent. Although a method for synthesizing a polymer through the cyclodextrin is utilized, but the method for synthesizing a copolymer through the maleic anhydride is not reported; because the cyclodextrin has special characteristics of external hydrophilic and internal lyophobic, the cyclodextrin is grafted to a polymer chain so that the viscosity of the polymer water solution is increased and the supramolecular chemistry is introduced into the petroleum industry. The method has the advantages that the method for synthesizing the unsaturated cyclodextrin monomer is simple, the temperature-resistant and the salt-resistant effect are obvious, the yield is high and the cost is low. The unsaturated cyclodextrin monomer is grafted to the copolymer chain through a simple method, the temperature-resistant and the salt-resistant research (the salt used in the experiment includes sodium chloride and calcium chloride) are processed, and the experiment result shows that the temperature-resistant and the salt-resistant property of the ternary copolymer are increased due to the introduction of the cyclodextrin.

The invention relates to a polyether sulphone hollow intelligent fibrous membrane with pH sensitivity, a method for preparing the same and application of the fibrous membrane. The method is characterized in that 8 to 24 weight portions of acrylonitrile, 5 to 18 weight portions of crylic acid, 70 to 85 weight portions of a solvent and 0.1 to 0.5 weight portion of an evocating agent are added into a reaction kettle with a stirrer, a thermometer and a condenser; under stirring, the mixture reacts for 8 to 24 hours at a temperature of between 55 and 70 DEG C to obtain an acrylonitrile-crylic acid copolymer solution; and 10 to 28 weight portions of polyether sulphone, 70 to 85 weight portions of a solvent and 1.5 to 6 weight portions of an additive are put into a vessel and dissolved for 2 to 24 hours at a temperature of between 75 and 95 DEG C under stirring to prepare a polyether sulphone solution, and 0.2 to 0.6 weight portion of the synthetic copolymer polyether sulphone solution is added into the prepared polyether sulphone solution; and the mixed solution is mixed for 2 to 24 hours at a temperature of between 55 and 65 DEG C under stirring. The mixed solution is subjected to filtering and defoaming and is positioned for curing to prepare a polyether sulphone spinning solution. The polyether sulphone spinning solution is spun to prepare the intelligent type hollow fibrous membrane with pH sensitivity by dry spraying-wet spinning technology; and the membrane has different screening coefficient and flux on acidic amino acid and basic amino acid, thereby being applied to separation of amino acid.

Macromolecular water-soluble conjugates based on synthetic copolymers to which at least one affinity tag, at least one imaging probe, and at least one targeting ligand are bound via covalent bonds. The macromolecular conjugate may be used in identification, visualization, quantification or isolation of proteins and/or cells. The targeting ligand may be attached to the synthetic copolymer via a flexible linker.

Random or block co- or terpolymers produced by using metal complex catalysts in a reaction of one conjugated diene monomer with one aromatic Random or block co- or terpolymers produced by using metomers with one aromatic alpha-olefin or terpolymers of one conjugated diene monomer with one aromatic alpha-olefin and one aliphatic alpha-olefin by using metal complexes comprising metals of group 3 to 10 of the Periodic System of the Elements in combination with activators and optionally a support material. More particularly the metal complexes used for the synthesis of co- or terpolymer are lanthanide metals. Even more particularly diene monomer(s) and aromatic alpha-olefin monomer(s) such as, but not limited to, butadiene and styrene or isoprene and styrene are copolymerized giving random or block copolymers or butadiene, styrene and isoprene are terpolymerized giving random or block terpolymers using metal complexes comprising lanthanide metals in combination with activators and optionally a support material. Preferably random co- or terpolymers are formed.

The invention discloses a lanthanide-MOF (Metal Organic Framework) doping-based electrostatic spinning fiber membrane serving as a fluorescent sensor and a preparation method thereof. The sensor is applied to the quantitative detection of uric acid in human urine. The detection process comprises the following steps of: (I) synthesizing Eu-PTA-MOF powder; (II) synthesizing a copolymer PMMA/PVP; (III) preparing an electrostatic spinning solution; (IV) preparing a nanofiber membrane; (V) cutting the nanofiber membrane; (VI) inserting the cut membrane into a cuvette; and (VII) recording fluorescence spectrum data. The prepared electrostatic spinning fiber membrane shows various kinds of characteristic blue fluorescence of Eu<3+> and good hydrophilicity and shows good fluorescence detection stability at the pH value of 4.5-8.0 in 30 minutes; the quenching efficiency of the uric acid on the electrostatic spinning fiber membrane fluorescence shows good concentration dependence and anti-interference performance; the detection range of the uric acid is 3-100 [mu]M and the detection limit is 1.3 [mu]M; in addition, the electrostatic spinning fiber membrane can be used repeatedly. The invention provides a simple and efficient method for the quantitative detection of the uric acid in biological fluids.

The invention provides a composite hydrate kinetic inhibitor based on a vinyl imidazole copolymer and an application thereof. The composite hydrate kinetic inhibitor is prepared from a vinyl imidazolecopolymer and an assisting agent, wherein the assisting agent is N-butyl-N-methylpyrrolidinium tetrafluoroborate and diethylene glycol monobutyl ether, the structure of the vinyl imidazole copolymeris as shown in a formula I (described in the specification), wherein n is equal to 10-600, m is equal to 2-900, and the molecular weight distribution coefficient of the vinyl imidazole copolymer is between 1.2 and 1.8. By introducing 1-Vinylimidazole in the process of copolymer synthesizing, through the strong hydrophilicity and biodegradability of imidazole five-membered ring, compared with a single homopolymer PVCap, the water solubility and environmental friendliness of the copolymer inhibitor are improved.

The invention relates to a method for preparing high-strength supramolecular hydrogel. The method comprises the following steps: (1) synthesizing polyethylene glycol-polycaprolactone-polycationic copolymer; (2) preparing a copolymer/nucleic acid composite liquid; and (3) mixing the copolymer/nucleic acid composite liquid obtained in the step (2) and an alpha-cyclodextrin liquid to prepare the high-strength supramolecular hydrogel. The invention also relates to the high-strength supramolecular hydrogel prepared by the method and an application of the hydrogel. The hydrogel forming process does not have chemical crosslinking reactions, the influence of chemical crosslinking reaction by-products on the activity of nucleic acid can be effectively avoided, the hydrogel has an effective gene transfer effect, the preparation method is convenient and quick, the hydrogel can be formed at room temperature, and the bioactivity of an embedded gene and the biocompatibility of a material can be kept. According to the hydrogel, the defect of quick degradation of current similar gel materials can be overcome, the nucleic acid can be released for more than 2 weeks, and the aim of long-time durable transfection can be achieved.

The present invention is a soft tissue sheet having reduced lint and slough. The tissue sheet comprises papermaking fibers and a synthetic co-copolymer. The synthetic co-polymer has the general structure:

wherein R¹, R², R³ are independently selected from a group consisting of: H; C_1-4 alkyl radicals; and, mixtures thereof; R⁴ is selected from a group consisting of C₁-C₈ alkyl radicals and mixtures thereof; Z¹ is a bridging radical attaching the R⁴ functionality to the polymer backbone; and, Q¹ is a functional group containing at least a cationic quaternary ammonium radical. w, x, y≧1 and the mole ratio of x to (x+y) is about 0.5 or greater.

The invention belongs to the technical field of materials, and discloses a phase-change temperature-regulating microcapsule, a preparation method and application thereof. The phase-change temperature-regulating microcapsule comprises a phase-change material core material and a wall material wrapping the phase-change material core material, phase-change material paraffin is used as the core material, toluene-2, 4 diisocyanate (TDI) and hexamethylenediamine are used as the wall material, a hydrolysate of a synthesized copolymer styrene-maleic anhydride (SMH) is used as an emulsifier, an in-situpolymerization technology is adopted, and the phase-change material is coated with the microcapsule to prepare the phase-change temperature-regulating microcapsule. The influence of experimental parameters on microcapsule synthesis is studied through orthogonal experiments, and finally the microcapsule synthesis process is determined. The technical indexes of the process are as follows: the average particle size of the temperature-regulating microcapsule is about 1 micron, and the phase-change temperature is 34-39DEG C. The process technical indexes of the phase-change temperature-regulating fiber are as follows: the average breaking strength of the viscose-based microcapsule phase-change temperature-regulating fiber is 18.97cN/tex, and the average elongation at break is 13.1%.