53results about How to "Long gelling time" patented technology

New and novel copolymers of vinylidene fluoride and hexafluoropropylene containing up to 24% by weight hexafluoropropylene having lower DSC melting temperatures at 8 weight percent or greater nominal HFP content, and having improved solution clarity and fluidity, longer gel times and lower extractables than prior art vinylidene fluoride-hexafluoropropylene copolymers of comparable HFP content whose syntheses are disclosed in sufficient detail to duplicate, to novel compositions of matter and articles of manufacture containing such copolymers, processes for the preparation and use of the copolymers, of the compositions of matter containing such copolymers and of the articles of manufacture containing such copolymers are disclosed. Improved electrochemical cells based on the new and novel copolymers are particularly disclosed.

The invention relates to an epoxide resin and the use. The epoxide resin comprises an epoxide, the reacting deflocculating agent and the curing agent, wherein the reacting deflocculating agent is a monomer or oligomer of acrylate and methacrylate with the low viscosity in the ambient temperature and a or a plurality of unsaturated double bond reactive function group, the reacting deflocculating agent is charged in the epoxide resin and is mixed uniformly in order to form the host crystal of the epoxide formulation, the host crystal comprises the reacting deflocculating agent 5-30 parts and agent B which forms epoxy resin formulation comprised by curing agent, the weight percentage of the agent B and the host crystal is 20-50 :100. The invention can improve the gel time, the temperature of exothermic peak and the processing operation characteristic of viscosity in the hardening process of the epoxide, which reduces the mechanical properties of the cured epoxide less, improves the tenacity of the epoxide, is suitable for manufacturing structural element of large scale composite material (air vane, craft, car and aerial craft and the like), and has good operation time, low exothermic peak temperature and fiber immersing property.

The invention is directed to stable and labile crosslinked water swellable polymeric microparticles that can be further gelled, methods for making same, and their various uses in the hygiene and medical arts, gel electrophoresis, packaging, agriculture, the cable industry, information technology, in the food industry, papermaking, use as flocculation aids, and the like. More particularly, the invention relates to a composition comprising expandable polymeric microparticles having labile crosslinkers and stable crosslinkers, said microparticle mixed with a fluid and an unreacted tertiary crosslinker comprising PEI or other polyamine based tertiary crosslinker that is capable of further crosslinking the microparticle on degradation of the labile crosslinker and swelling of the particle, so as to form a stable gel. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric microparticles are injected into a well and when the heat and / or pH of the well cause degradation of the labile crosslinker and when the microparticle expands, the tertiary crosslinker crosslinks the polymer to form a stable gel, thus diverting water to lower permeability regions and improving oil recovery.

The invention discloses a heat-resisting interpenetrating polymer network plural gel profile control agent. The heat-resisting interpenetrating polymer network plural gel profile control agent is characterized by being composed of the following components including (a) sodium silicate, (b) cross-linking agent which is a hydrolysable ester compound, (c) cross-linking agent which is selected from compounds of phenolic resin cross-linking agent, chromium lactic, aluminum citrate or zirconium citrate, (d) polymers which are selected from hydrolytic polyacrylamide, xanthan gum or cellulose, (e) additive I which is selected from sodium bentonite, calcium bentonite or nano silica, (f) additive II which is selected from diatomite or silicate, and (g) water. The invention also provides a preparation method of the heat-resisting interpenetrating polymer network plural gel profile control agent.

The invention relates to a delaying cross-linking polymer hard-gel in-depth profile controlling agent and a preparation method thereof. The profile controlling agent consists of the following raw materials: anionic poly aceylanide, sodium dichromate, sodium sulfite, soldium salicylate and water. The preparation method is carried out according to the following steps of: adding the required amount of anionic poly aceylanide into the required amount of water; after the anionic poly aceylanide is sufficiently dissolved, sequentially adding the required amounts of sodium dichromate, sodium sulfiteand soldium salicylate; and sufficiently stirring to obtain the delaying cross-linking polymer hard-gel in-depth profile controlling agent. The delaying cross-linking polymer hard-gel in-depth profile controlling agent and the preparation method thereof have the beneficial effects that the delaying cross-linking polymer hard-gel in-depth profile controlling agent is simple to prepare, has stable performances, is convenient to construct, has long gelling time and has strong gel strength after being gelled; the long-term and large-dose injection is realized on site; and the delaying cross-linking polymer hard-gel in-depth profile controlling agent disclosed by the invention can enter the deep position of an oil pool to block a preferential path so as to improve the waterflooding extraction effect and improve the recovery ratio of the oil pool. The delaying cross-linking polymer hard-gel in-depth profile controlling agent is applied for over 40 well times on site and has good applicationeffect.

The invention discloses a ground crosslinked acid crosslinking agent and a preparation method thereof. The crosslinking agent comprises 5-20% of zirconium oxychloride, 10-50% of a low molecular alcohol, 5-25% of alpha-hydroxy carboxylic acid, 5-25% of a polyol, 0.1-2.0% of a polyhydroxy carboxylate and the balance of water. The preparation method comprises dissolving the 5-20% of zirconium oxychloride in the balance of water, adding the low molecular alcohol, letting in nitrogen, heating up to 50-60 DEG C, reacting for 1.5h-2h, stopping nitrogen, adding the 5-25% of alpha-hydroxy carboxylic acid, the 5-25% of polyol and the 0.1-2% of polyhydroxy carboxylate, continuing to react for 1.5h-2h at 50-55 DEG C, neutralizing a reaction product to pH for 3-5 to obtain the crosslinking agent. The crosslinking agent can crosslink acrylamide polymers in an acid liquid with a high concentration to obtain acid containing gel with high viscosity, and is especially suitable for oilfield reservoir acid fracturing of 100-150 DEG C.

A method of forming a gel monolith includes preparing a first solution comprising metal alkoxide and preparing a second solution comprising a catalyst. A third solution is prepared by mixing the first solution and the second solution together. At least one of the first, second, and third solutions is cooled to achieve a mixture temperature for the third solution which is substantially below room temperature, wherein the third solution has a significantly longer gelation time at the mixture temperature as compared to a room temperature gelation time for the third solution. The method further includes allowing the third solution to gel, thereby forming the gel monolith.

The invention discloses an environment-friendly crosslinking and gelling retarding profile control agent and a preparation method thereof and belongs to the field of enhanced oil recovery technologies for oilfields. The profile control agent comprises a primary agent, i.e. hydrophobic association, a crosslinking agent, i.e. aluminum citrate, an antioxidant, i.e. sodium sulfite, and a retarding agent, i.e. sodium malate, and contains all the ingredients in percentage by weight: 0.1-0.4% of hydrophobic association, 0.01-0.02% of aluminum citrate, 0.015-0.025% of sodium sulfite, 0.005-0.020% of sodium malate and the balance of water. The profile control agent disclosed by the invention has the characteristics that the profile control agent is environment-friendly and is free of damage / injury to environments / human bodies; the crosslinking is retarded, and the gelling time is prolonged, thereby being beneficial to high-dose injection and deep profile control; the plugging rate is high; and the profile control agent has certain temperature-resistant and salt-tolerant performance and scouring resistance. The profile control agent can be used for adjusting a water absorption profile of a water-flood well and improving the water-flood development effect of oilfields.

The invention discloses a coating type crosslinker and a preparation method and application thereof. The coating-type crosslinker is prepared by using toluene-2,4-diisocyanate as an oil-soluble monomer, whiteruss as an oil phase, ethanediamine as a water-soluble monomer, organic acid chrome aqueous solution as a core material and octyl phenol polyoxyethylene (10) ether and sorbitol anhydride monostearate as emulsifiers. A crosslinking polymer system formed by the crosslinker and a suitable polymer has long gelatinizing time and high and controllable gelatinizing strength and can enter the deep part of stratum to achieve the aim of deep profile control or profile modification.

The invention specifically relates to epoxy resin for a 50: 50 indoor powdery paint with a high leveling grade and further discloses a preparation method thereof, belonging to the technical field of powdery paints. The epoxy resin for the 50: 50 indoor powdery paint with a high leveling grade is prepared through polymerization of bisphenol A, epichlorohydrin, sodium hydroxide, polyethylene glycoldiglycidyl ether, pentaerythritol dioleate, E-51 epoxy resin, adipic acid, cyclohexane-1,2-dicarboxylic acid diglycidyl ester and N,N-dimethylformamide. The synergistic action among the raw materialsensures that the produced epoxy resin has excellent overall performance such as impact resistance, excellent adhesion, water resistance, etc. The epoxy resin is finally applied to the 50:50 indoor powdery paints and allows a coating with excellent comprehensive performance and a high leveling grade to be obtained.

The invention relates to a water and leakage plugging material of retarded crosslinking gel wrapping high valence metal ions, which can plug crack and cave leakage stratum, and the preparation of wrapped particles is easy to realize batch production. The technical scheme comprises the following steps: adding acrylamide, styrene, zirconium tetrachloride and N,N-methylenebisacrylamide into deionized water, adding initiator after dissolving, standing for 1hour at room temperature to obtain gel, pelleting, stoving and screening to obtain solid-phase particles; adding Span-80 into dimethylbenzene to prepare an oil phase; dissolving polyvinyl alcohol into deionized water to prepare an aqueous phase; adding the solid-phase particles into the aqueous phase, uniformly mixing, adding the mixture into the oil phase, fully stirring to form an inverse phase suspension, evaporating under 100-110 DEG C to remove water, filtering, washing and drying to obtain wrapped particles, and optionally wrapping again; adding the particles and stabilizer into an HPAM (hydrolyzed polyacryamide) aqueous solution to obtain fixed gel. The production of the material is easy to operate and is low cost, the time for gel forming is long, and the material has the characteristics of less filter loss, good leak tightness and good stability.

The invention discloses a delustering agent for an epoxy polyester powder coating. The delustering agent is prepared from the following components in parts by mass: 5-50wt% of carboxyl acrylic resin,10-45wt% of epoxy acrylic resin, 30-55wt% of metal salts or organic metal composites, 0-20wt% of wax or wax analogues and 0-20wt% of filler. The delustering agent prepared by the invention can obtaina full coating appearance with extremely low glossiness and extremely good leveling property and also has relatively long gel time and relatively high storage stability.

The invention provides a method for determining an organic chrominum cross-linkage gel system based on low molecular weight high concentration polymers, comprising steps of: selecting chromium acetate as a primary cross-linking agent; selecting high concentration polymers having a low molecular weight of 4 million as raw materials of profile control agents; For the high concentration polymers having a low molecular weight of 4 million, the concentration is 0.6 to 0.8 percent; the concentration ratio between the high concentration polymers and the first cross-linking agent is 25:1 to 35:1; the intensity of formed gel is 190 to 200mPa.s. The invention has a strong selectivity and is simple in a construction process, moreover the invention can neither bring permanent damage to stratums nor obstruct the performing of later measures.

The invention discloses side slope grouting slurry for silty-fine sand embankment widening, prepared from the following raw material in parts by weight: 3-15 parts of water glass, 2-10 parts of acetic acid, 1-5 parts of calcium chloride, 0.2-3 parts of disodium hydrogen phosphate, 0.1-5 parts of ferric trichloride, 0.1-5 parts of aluminum chloride, and 0.1-3 parts of phosphoric acid or sulfuric acid. The side slope grouting slurry for silty-fine sand embankment widening has the advantages as follows: (1) the slurry provided by the invention is good in permeability, large in dispersion radius after grouting, high in grouting reinforcement strength and good in homogeneity, and the gelation time of the slurry in the air and the sand layer is long; (2) the rest materials of the raw materials apart from the acetic acid which is an organic matter are all inorganic matters, and all of the raw materials do not belong to the range of hazardous article control, and may not cause pollution on the surrounding environment in the use process; the by-products of the slurry after solidification reaction also has no pollution on the environment, and is environment-friendly and harmless; and (3) the raw materials are low in price and wide in source.

A polyurethane adhesive composition having a long pot life that does not cause its user to experience breathing difficulty is described. In one embodiment, the adhesive is prepared from a mixture of a high molecular weight component, an isocyanate, and a proton donor.

The invention relates to high-strength slow-crosslinked chromic gel and a preparation method thereof. The gel comprises, by mass, 0.6-1.0% of a main agent, 0.2-0.4% of a cross-linking agent, 0.5-1.5%of a stabilizer and the balance water, wherein the percentage sum of the components is 100%, the main agent is an AM / DAC biopolymer, the cross-linking agent is chromium acetate, and the stabilizer isaluminum sol. The chromic gel is high in gel forming strength which can reach 15 Pa or above. The gel forming time is controllable and is in the range of 42-70 hours, the field operation requirementsof deep profile control can be met, and an effective plugging effect can be achieved in an oil reservoir environment at the temperature of 90 DEG C.

The invention discloses a fiberglass reinforced plastic and the manufacturing method thereof. The manufacturing method includes providing a die including a die cavity, providing a depositing layer in the die cavity, providing a diverting device on the depositing layer, providing a vacuum bag on the diverting device and covering the die cavity to seal the diverting device and the depositing layer between the vacuum bag and the die, injecting resin in the die cavity and heating the resin. The fiberglass reinforced plastic prepared with the method is excellent in surface flatness. The resin is long in curing time, short in hardening time, low in dispersed heat, high in glassfiber conversion temperature and low in contraction. The fiberglass and carbon fiber are excellent in immersion performance.

The invention provides a medium-low temperature gel based on a cationic cross-linking agent and used for stratum plugging. The cationic cross-linking agent is poly(4-vinylbenzene tetrahydrothiophene tetrafluoroborate), and the medium-low temperature gel for stratum plugging is prepared by the following steps: dissolving polyacrylamide and the cationic cross-linking agent in water, and fully and uniformly stirring under the condition of heating to 22-90 DEG C to obtain a mixed solution; adjusting the pH value of the mixed solution to be 3-11, continuously stirring uniformly, and standing at constant temperature sufficiently to obtain the medium-low temperature gel for stratum plugging. The cationic cross-linking agent and polyacrylamide are subjected to covalent cross-linking in a large temperature range (including medium and low temperature), so that the medium-low temperature gel for stratum plugging, which has relatively good salt resistance and mechanical properties, is further provided.

The invention discloses a copolymer elastic gel type profile control agent for chemical oil recovery of an oilfield, and belongs to the field of oil field application chemical agents. The copolymer elastic gel type profile control agent for chemical oil recovery of the oilfield comprises a polymer, a crosslinker, a stabilizer, an additive and water. The profile control agent has the advantages oflong gel formation time, penetration deep into the oil layer, strong plugging property, good stability, high compressive strength, long effective period, slowness in moving deep into the formation, good shear resistance, good elasticity, effectiveness in plugging of large pores and cracks of the oil reservoir, dynamic spreading effect, good dual effects of profile control and oil displacement, simplicity in preparation, good resistance to the temperature and salt, convenience in construction, and small pollution to non-target layers.

The present invention relates to plastic moldings that are prepared from optionally filled polyurethanes. The plastic molding of the present invention exhibit high tenacity, flexural strength and heat stability. This invention also relates to a process for the preparation of these plastic moldings and specifically to a process for the production of large parts comprising these plastic moldings.

The invention discloses a secondary cross-linked gel profile control and flooding agent with low filtration loss. The profile control and flooding agent is prepared from a main agent, an activating agent, a primary crosslinking agent, a secondary crosslinking agent and water, wherein the activating agent is N,N-dimethyl-polyamide-amine; the primary crosslinking agent is hexamethylene tetramine orresorcin; the secondary crosslinking agent is a mixture of phenol and formaldehyde; the main agent is one of partially hydrolyzed polyacrylamide, a comb type polymer, a hydrophobically associated polymer or a hyperbranched polymer; the profile control and flooding agent is prepared from the following components in percentage by mass: 0.075 to 0.4 percent of the main agent, 0.02 to 0.075 percent ofthe activating agent, 0.03 to 0.3 percent of the primary crosslinking agent, 0.02 to 0.5 percent of the secondary crosslinking agent and the balance of the water. A secondary cross-linked gel systemis convenient to prepare on the scene and has strong feasibility; the secondary cross-linked gel system can be widely applied to profile control and flooding of strong non-homogeneous oil deposit andimproving a water injection developing effect.

The invention provides an electrostatic spraying priming paint. The electrostatic spraying priming paint comprises an agent A and an agent B. The agent A comprises the following components in parts by weight: 45-62 parts of first alkyd resins, a parts of second alkyd resins, b parts of defoaming agents, c parts of flatting agents, 1-5 parts of fillers, and 1-4 parts of bentonite; the agent B comprises the following components in parts by weight: d parts of toluene diisocyanate trimer, 30-60 parts of toluene diisocyanate-trimethylolpropane addition products, and 10-50 parts of solvents; the mass ratio of the agent A to the agent B is 1 to (0.3-0.8). The electrostatic spraying priming paint comprises bentonite, the content of toluene diisocyanate trimer in the electrostatic spraying priming paint is less, and the mass proportion of the agent A and the agent B in the electrostatic spraying priming paint is moderate, so that the electrostatic spraying priming paint is high in sagging resistance and cladding property and long in gel time.

The invention relates to a method for preparing a rutile titanium dioxide nano-film by virtue of a sol-gel method, belonging to the technical field of film preparation. The method comprises the following steps: firstly preparing a precursor solution by taking tetrabutyl titanate (Ti(OBu)4) as a solute and taking mixed liquid of monoethanal amine, glycol methyl ether and acetone as a solvent, wherein the concentration of tetrabutyl titanate in the precursor solution is 0.1mol / L-1mol / L, and the volume ratio of monoethanal amine to glycol methyl ether to acetone is 1 to 1 to 0.5; adding acetylacetone as a chelating agent and glycerol as a thickening agent, and stirring, so as to obtain transparent and uniform sol; finally carrying out spin coating and high-temperature sintering, so as to obtain the rutile titanium dioxide nano-film on a silicon wafer. The method has the advantages that the cost is low, the process is simple, the repeatability is good, and the mass manufacturing can be realized.

The invention provides a seawater-based polyacrylamide high-temperature gel profile control system. The system comprises a main agent, a cross-linking agent, a high-temperature stabilizer and simulated seawater; the main agent is a polyacrylamide polymer; the cross-linking agent is an organic phenolic aldehyde cross-linking agent; and the high-temperature stabilizer is one or a combination of thiourea, amino acid, oxalate, citrate and salicylate. The seawater-based polyacrylamide high-temperature gel profile control system provided by the invention can meet the use requirements of seawater sample preparation and 90-130 DEG C high-temperature environment in profile control and water plugging operation of an offshore high-temperature oil field; when being used in a stratum, the gel plugging agent preferentially enters a high-permeability layer, a high-strength and non-flowing gel system is formed under the oil reservoir condition, and the purposes of plugging the high-permeability layer, improving the injection efficiency and increasing the crude oil recovery rate can be achieved; and the system has the advantages of long gelling time and high gel strength, can be stable for a long time in a high-temperature environment without being damaged for 60 days, and has better plugging capacity.

The invention is directed to stable and labile crosslinked water swellable polymeric microparticles that can be further gelled, methods for making same, and their various uses in the hygiene and medical arts, gel electrophoresis, packaging, agriculture, the cable industry, information technology, in the food industry, papermaking, use as flocculation aids, and the like. More particularly, the invention relates to a composition comprising expandable polymeric microparticles having labile crosslinkers and stable crosslinkers, said microparticle mixed with a fluid and an unreacted tertiary crosslinker comprising PEI or other polyamine based tertiary crosslinker that is capable of further crosslinking the microparticle on degradation of the labile crosslinker and swelling of the particle, so as to form a stable gel. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric microparticles are injected into a well and when the heat and / or pH of the well cause degradation of the labile crosslinker and when the microparticle expands, the tertiary crosslinker crosslinks the polymer to form a stable gel, thus diverting water to lower permeability regions and improving oil recovery.

The invention relates to slow cross-linking jelly for profile control of medium-high temperature oil reservoirs and a preparation method of the slow cross-linking gel. The gel comprises the following components in percentage by mass: 0.4%-1.0% of a main agent, 0.2%-1.0% of a cross-linking agent, 0.05%-0.2% of a catalyst, 0.3%-1.0% of a stabilizer, 0.025%-0.1% of an accelerant and the balance of water, and the sum of the components is 100%. The main agent is an acrylamide / 2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer, the cross-linking agent is melamino-formaldehyde resin, the catalyst is ammonium chloride, the stabilizer is acidic silica sol, and the accelerant is hydroquinone. The slow crosslinking gel for profile control of the medium-high temperature oil reservoir is suitable for water shutoff and profile control of an oil layer with the temperature of 90-110 DEG C and the mineralization degree of 1.0*10<5>-4.0*10<5> mg / L, the gel forming time is controllable within 72-168 hours, and the formed gel is high in strength, can reach the G-I level, is good in stability and can meet the requirements of deep profile control field operation.

The invention discloses an unsaturated polyester material electrostatically sprayed at the high temperature of 38 DEG C and gelatinized for 80 minutes. The material comprises, by weight, 38-48 parts of unsaturated polyester resin, 1-3 parts of polishing aids, 35-55 parts of inorganic fillers, 3-6 parts of solvents, 1-2 parts of anti-settling agents, 1-2 parts of enhanced anti-settling rheologicalagents, 1-3 parts of hardening agents, 0.1-0.5 part of defoaming agent, 0.2-0.5 part of leveling agent, 0.1-0.2 part of conducting assistants, 0.5-0.7 part of polymerization inhibitor, 3-5 parts of adhesion promoters and 0.5-0.7 part of slow-drying anti-greening dispersing agent. The unsaturated polyester material has the advantages that the material is suitable for rotary-cup-type electrostatic spraying, and the paint utilization rate is increased; the gelatinization time reaches 80 minutes in an environment with the temperature of 38 DEG C, and performance and environmental protection requirements are met at the same time.

The invention discloses a method for preparing a rutile titanium dioxide nanometer film by a sol-gel method, which belongs to the technical field of film preparation. First, use tetrabutyl titanate (Ti(OBu)4) as the solute, and a mixture of monoethanolamine, ethylene glycol methyl ether and acetone as the solvent to prepare a precursor with a tetrabutyl titanate concentration of 0.1-1mol / L solid solution, wherein the volume ratio of monoethanol ammonia, ethylene glycol methyl ether and acetone is 1:1:0.5; then add acetylacetone as a chelating agent and glycerol as a tackifier, and stir to obtain a transparent and uniform sol; Finally, through spin coating and high-temperature sintering, a rutile titanium dioxide nanometer film is obtained on the silicon wafer. The method of the invention has the advantages of low cost, simple process, good repeatability and large-scale production.