39results about How to "Reduce water sensitivity" patented technology

The present invention relates to a radiation-curable solvent-free coating composition for optical fiber having a radiation-curable urethane (meth)acrylate oligomer comprising an alkyd backbone,a reactive diluent, and a photoinitiator, and optionally an additive.

The invention provides a method for preparing an aqueous dispersion of polymer particles comprising the following steps: (i) preparing a dispersion having a continuous aqueous phase, a dispersed organic phase comprising one or more ethylenically unsaturated monomers, and an amphiphilic RAFT agent as a stabiliser for said organic phase, and (ii) polymerising said one or more ethylenically unsaturated monomers under the control of said amphiphilic RAFT agent to form said aqueous dispersion of polymer particles, novel amphiphilic RAFT agents for use in this method, novel RAFT agents useful in making these amphiphilic RAFT agents and methods for their manufacture.

The present invention relates to a composite article obtained from binding or adhesion of particulate matter with a polyurethane binder which is derived from a urethane-modified isocyanate obtained by reaction of an isocyanate with a polyether polyol based on an initiator containing a tertiary nitrogen atom. Such composite articles can be, for example, recreational matting or tiles, sports or running tracks, or flooring, or laminates.

A process for manufacturing asphalt is disclosed. The process comprises the steps of : (i) heating bitumen; (ii) heating aggregate; and (iii) mixing the hot bitumen with the hot aggregate in a mixing unit to form asphalt. From 10 to 200 wt % of sulphur, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii) and from 0.1 to 20 wt % of paraffin wax is added in at least one of the steps (i), (ii) or (iii).

The invention relates to a cement adhesive with low energy consumption and super-early strength for binding of an insulator and a preparation method thereof. The cement adhesive is prepared from the following raw materials of quick-hardening cement, common cement, micro-silicon powder, binding quartz sand, a composite admixture and water, wherein the composite admixture consists of a retarder, a polycarboxylate superplasticizer, an early strength agent, a tackifier and a defoamer according to a ratio. The cement adhesive has the beneficial effects that (1) the production efficiency of the insulator is greatly improved by the compounding of the quick-hardening cement and the common cement; (2) the strength stability, anti-seepage property and durability are excellent; (3) by adopting the proper tackifier, the water sensitivity is decreased, the viscosity of the cement adhesive is adjusted, and the operability of the cement adhesive is obviously improved; (4) the binding time of the adhered insulator is greatly shortened, and the utilization rate of a curing tank is improved; (5) by adopting the three-step mixing method, the ratio of premixture to the quick-hardening cement is properly adjusted, so as to maintain the actual condensing time and operation time of the cement adhesive.

There is described use of a biorenewable copolymers in one or more of: in a topical and/or personal care composition, as a binder for toner, as an encapsulating agent for a colorant, as a hybrid colorant, as additive for sheet moulding compounds, as a plastic pigment, as a filler for composite materials such as concrete, as a filler for coatings and/or waxes; and/or as a spacer in a display; where the biorenewable copolymer comprises (a) at least 8. 5 wt-% preferably >=20 wt-% of a higher itaconate diester (preferably dibutyl itaconate—DBI); (b) less than 23 wt-% acid monomer but also sufficient to have an acid value less than 150 mg KOH/g of polymer, (c) optionally with less than 50 wt-% of other itaconate monomers, and (d) optionally less than 77 wt-% of other monomers not (a) to (c). The DBI may be biorenewable. One embodiment is an aqueous dispersion of vinyl sequential polymer of two phases: A) 40 to 90 wt-% of a vinyl polymer A with Tg from −50 to 30° C.; and B) 10 to 60 wt-% of a vinyl polymer B with Tg from 50 to 130° C.; where DBI is used to prepare A and/or B and polymer A has from 0.1 to 10 wt-% of at least one acid-functional olefinically unsaturated monomer.

The invention provides a method for increasing the strongly water-sensitive heavy oil reservoir recovery ratio. The method comprises the steps of injecting antiswelling solutions in a steam injection well in a heavy oil reservoir, the injection quantity of each period being 3-4t and the injection time being 2 hours; and continuously and independently injecting steam in the steam injection well. The antiswelling solutions are obtained by using preparation water to diluting mother solutions with high concentration until the concentration becomes 10%. The method is characterized in that the antiswelling agents are injected to facilitate steam huff and puff, thereby increasing the strongly water-sensitive heavy oil reservoir recovery ratio. At high temperature, the antiswelling agents can effectively restrain clay swelling, reduce the water sensitivity of reservoir strata, increase the oil layer permeability, increase the swept volume of steam and reduce the viscosity of crude oil, thereby increasing the strongly water-sensitive heavy oil reservoir recovery ratio.

The invention provides ternary high-nickel electrolyte and a high-nickel anode lithium ion battery containing the electrolyte. The ternary high-nickel electrolyte is characterized by comprising, by weight, 13-15% of lithium salt, 80-85% of a non-aqueous organic solvent and 0.1-5% of an additive; wherein the additive comprises vinylene sulfate, vinylene carbonate, succinonitrile, tris (trimethyl silicon-based) phosphorus, lithium bifluroflavin imide and lithium dioxalate borate; the lithium salt is lithium hexafluorophosphate; the non-aqueous organic solvent comprises a cyclic carbonate compound, dimethyl carbonate and ethoxy pentafluoro tripolyphosphate; the high-nickel anode lithium ion battery containing the ternary high-nickel electrolyte adopts anode slurry prepared from high-nickel ternary anode powder, a conductive agent, a functional composite binder, a solvent N-methyl pyrrolidone to prepare the anode membrane, the high-nickel anode lithium ion battery has excellent normal-temperature cycle performance, high-temperature cycle performance and high-temperature storage service life, and can obviously reduce the gas yield in the high-temperature storage process.

The invention discloses an oil reservoir protection accelerator and a preparation method of the oil reservoir protection accelerator. The oil reservoir protection accelerator comprises the following components in percentage by weight: 0.1-1.0 percent of polyepichlorohydrin-dimethylamine, 0.5-2.0 percent of ammonium chloride, 0.1-0.5 percent of a surfactant, 5-15 percent of ethanol, and the balance of water. The oil reservoir protection accelerator is relatively-high in anti-swelling rate and anti-scouring degree, and can reduce the surface tension of working solutions and increase the filtration capacity of the working solutions; the water sensitivity and water blocking damages of a reservoir are greatly reduced, the aim that the protective reservoir is prevented from being damaged due to invasion of the working solutions is fulfilled, and the requirement of oil reservoir protection in a construction operation process of low-porosity and low-permeability reservoirs is met. The oil reservoir protection accelerator can be used in various measure working solutions in an oil field production process, can also be used as an addictive of the measure working solutions such as acidification, crushing, water plugging and profile control, and has functions of protecting stratum and preventing the stratum from being damaged in an operation process.

The invention relates to an acrylamide series terpolymer, a preparation method, and applications thereof. The acrylamide series terpolymer comprises a structural unit A, a structural unit B, and a structural unit C, wherein the structural unit A comprises a structural unit represented by the formula (1), the structural unit B comprises a structural unit represented by the formula (2), and the structural unit C comprises a structural unit represented by the formula (3). The acrylamide series terpolymer improves the solubility of the terpolymer in alcohol and clay inhibitor, has high drag reduction efficiency under a high salinity condition when the terpolymer is used as a drag reducer, and has a very good drag reducing effect in a pH range from 4 to 10.

The invention discloses a nano ATO/Tio2 transparent thermal insulation coating for ultralow VOC waterborne polyurethane/acrylic acid transparent building glass. The coating is prepared from waterbornepolyurethane/acrylic acid, ATO nano dispersion liquid, Tio2 nano dispersion liquid, an organic silicon cross-linking agent, a dispersing agent, a wetting agent, an antifoaming agent, an environment-friendly coalescing agent and a leveling agent. According to the invention, rutile reflection heat insulation TiO2 and radiation heat insulation ATO are compounded; the developed single-component waterborne polyurethane/acrylic acid transparent thermal insulation coating is green and environment-friendly, and meets the national environmental protection quality standard; the nano ATO/Tio2 transparent thermal insulation coating has excellent heat-insulating property and transparency, also has excellent paint membrane mechanical property, water resistance and weather resistance, can be widely applied to transparent heat insulation, heat preservation and energy conservation of automobile glass and building glass, and has a wide market prospect.

The present invention provides aqueous multistage copolymers, preferably, all acrylic and allylic or all acrylic copolymers, having as the outermost stage an acid functional, preferably, carboxyl or carboxylate functional, aqueous solution polymer and as the one or more remaining stage(s) a vinyl emulsion polymer, wherein the vinyl emulsion polymer stage(s) in the multistage copolymer comprises 5 wt. % or less of hydrophilic monomer, based on the total weight of monomers used to make the vinyl emulsion polymer stage(s). The multistage copolymer enables incorporation of a much higher amount of hydrophilic monomer into a vinyl emulsion copolymer. In addition, are methods of methods of making the multistage copolymers are provided.

A Construction waste improved expansive soil roadbed structure comprises a roadbed surface layer and an expansive soil filling layer under the roadbed surface layer, wherein the expansive soil fillinglayer is arranged on a construction waste pore water protective cushion filling layer, inverted filter layers are arranged on both sides of the construction waste pore water protective cushion filling layer, and a construction waste improved soil filling layer is filled on both sides and above the expansive soil filling layer. The roadbed structure is reconstructed by adopting the mixed modification of construction waste in the expansive soil area and utilizing the non-uniform characteristics of the particle size of the broken construction waste, thereby reducing the engineering cost of the roadbed capillary water protection of the urban expressway, effectively utilizing the construction waste and reducing the environmental pollution at the same time.

A process for manufacturing asphalt is disclosed. The process comprises the steps of: (i) heating bitumen; (ii) heating aggregate; and (iii) mixing the hot bitumen with the hot aggregate in a mixing unit to form asphalt. From 10 to 200 wt % of sulphur, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii) and from 0.1 to 20 wt % of a compound of formula A, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii). R¹ and R² are independently chosen from C6-C30 alkyl or alkenyl.

The present invention relates to a self hardening glass carbomer composition obtainable by treating a fluorosilicate glass powder with: (a) a poly(dialkylsiloxane) having terminal hydroxyl groups, wherein the alkyl groups contain 1 to 4 carbon atoms, (b) an aqueous acid solution, and (c) separating the treated fluorosilicate glass powder from the aqueous acid solution. The glass carbomer compositions according to the invention have for example good toughness and strength and excellent fluoride release, In addition, the glass carbomer compositions according to the invention do not show shrinkage or expansion, an essential property for providing fillings for cavities having high strength and long durability. Moreover, the glass carbomer composition according to the present invention has a lower sensitivity towards abrasion and wear, a greater stiffness, a smoother surface, a better colourfastness, a better adherence to e.g. bone tissue and a lower water sensitivity.

The invention provides a horizontal well drilling fluid without being mixed with oil and a preparation method of the horizontal well drilling fluid. The drilling fluid comprises the following components by mass: 1000 parts of water, 30-60 parts of bentonite, 5-15 parts of organic silanol, 20-30 parts of emulsified paraffin, 1-5 parts of cationic polymer, 5-15 parts of filtrate reducer, 30-50 partsof temperature resisting agent, and 0-200 parts of weighing agent. The horizontal well drilling fluid does not contain oil substances. The invention further provides an application of the horizontalwell drilling fluid without being mixed with oil. The oil substance is not added, the lubricating property of the drilling fluid is effectively improved through the matching of the cationic polymer, the emulsified paraffin and an organic silanol inhibitor together, the negative charge in the clay is effectively neutralized in the use process, the water sensitivity of the clay is reduced, the stability of the wall of a well is improved, and the requirement on the drilling fluid in the drilling process of the horizontal well is met.

The invention discloses an expansive soil texture improved roadbed structure in a seasonally frozen soil area. A first improved reinforcing layer, a construction waste filling layer, a second improvedreinforcing layer and a construction waste filtering layer are sequentially arranged from top to bottom. The first improved reinforcing layer and the second improved reinforcing layer have the same components; the preparation method comprises the steps of uniformly mixing steel slag powder and expansive soil according to a mass ratio of 1: 4 to form a preliminary improved expansive soil mixture,crushing the construction waste until the particle size does not exceed 10mm, and mixing the crushed construction waste with the preliminary improved expansive soil mixture according to a mass ratio of (2 to 3): (1 to 2) to form an improved expansive soil filling material; the construction waste filter layer and the construction waste filling layer being both composed of construction waste with different particle size gradations. The expansive soil is improved by utilizing the construction waste and the steel slag powder, so that the water sensitivity of the expansive soil is effectively reduced, the strength and freeze-thaw resistance of the roadbed are effectively improved, and meanwhile, the construction waste, the steel slag and other wastes are effectively utilized.

The invention relates to the technical field of pavement repair, in particular to a premixed foamed asphalt in-situ cold-recycling base layer and bottom surface layer construction method which comprises the following steps: construction preparation: performing traffic closing on a construction road section, and cleaning a construction pavement through a high-pressure water gun; firstly, cutting two sides of a construction pavement, forming an isolation ditch between the construction pavement and an intact pavement, and cleaning pavement residues in the isolation ditch; preliminarily crushing the construction pavement, and destroying the overall structure of the construction pavement; taking the isolation ditch as a traffic lane, and paving the surface of the construction pavement with regenerated stabilizer, water and filler asphalt; milling a base layer and a bottom surface layer of the construction pavement through a cold recycling machine, mixing the old asphalt aggregate and the mixture together, and re-paving; and leveling the re-paved road surface, performing compaction after leveling is completed, and performing later maintenance. The original damaged pavement material is utilized and regenerated into a semi-flexible base layer at the same time, so that the construction concepts of energy conservation, emission reduction and green roads are met.

The invention relates to a preparation method of a salt-tolerant and stable type starch-based fluid-loss-resistant agent material and belongs to the technical field of fluid-loss-resistant agent materials. Cationic gel is prepared from methacrylamide propyl trimethyl ammonium chloride by polymerization, electrostatic adsorption can be formed between the gel and clay through cationic groups, actingforce of electrostatic adsorption is stronger than that formed by hydrogen bonds, fast adsorption can be realized even in a saline and high-temperature system, clay particle surfaces are wrapped withthe gel, so that specific surface area and the negative charges on the surface of the clay are reduced greatly, water sensitivity of the clay is weakened, functions of stabilizing the clay, suppressing dispersion and reducing fluid loss are achieved, and the fluid loss reduction performance of the material is improved effectively.