57results about How to "Increase initial viscosity" patented technology

The invention relates to water soluble alcohol-soluble polyurethane and a preparation method thereof. The method is characterized in that 5 to 35 percent of oligomer polyhydric alcohol reacts with 5 to 30 percent of polyisocyanate for 2 to 2.5h at 70 to 90 DEG C, 1 to 20 percent of hydrophilic chain-extending agent and 1 to 2 percent of acetone are added, the temperature is maintained at 60 to 70 DEG C for 1 to 1.2h, then 2 to 15 percent of chain-extending agent and 0.3 to 0.5 percent of catalyst are added, after reaction is performed at 60 to 70 DEG C for 3 to 4h, the temperature is reduced to 30 to 50 DEG C for discharging, and then a pre-polymer is obtained; after being neutralized with 2 to 5 percent of trihexylamine, the pre-polymer is added into 10 to 70 percent of ethyl alcohol, and an emulsion product can be obtained after emulsification. In the invention, not only superior properties such as high initial viscosity, quick solidification, good stability, etc. of solvent-type polyurethane can be guaranteed, but also the solid content of polyurethane can be adjusted to the actually required value through water, the default of the prior alcohol-soluble polyurethane that the operation is inconvenient because of water insolubility is overcome, thereby the invention can be used in industries such as lumber, flexible package, compound lamination, etc.

The invention discloses an interface bonding-enhanced aramid fiber composite material preparation method. The method is characterized in that isocyanate and epoxy resin are used for preparing modifiedepoxy resin having a molecule main chain containing a five-membered ring structure according to controllable proportion and technical reaction; liquid epoxy resin and a curing agent are added for kneading to obtain a pre-dip material resin system with synchronously increased bonding property and toughness; a resin glue membrane is prepared, then is composited with aramid fiber or fabric to obtaina pre-dip material, and finally moulding preparation is carried out to obtain the interface bonding-enhanced aramid fiber composite material. The toughness of the modified epoxy resin system is increased, the bonding property of a resin matrix and aramid fiber are enhanced, the technical performance of the pre-dip material is good, a processing moulding window is wide, the interlayer shearing intensity of the composite material is obviously increased, and the modified epoxy resin system can be used for the composite material having the aramid fiber structure.

The invention relates to organic silicon perfusion resin and a preparation method thereof. The preparation method comprises the following steps: selecting at least one silane monomer expressed according to a structure formula RnSiX4-n as an initial material, wherein R is an organic group and can be alkyl, aryl or vinyl, X is a hydrolysable group and can be chlorine atom, alkoxy or acyloxy, n is equal to 0 or 1 and the initial material comprises a vinylsilane monomer or hydrogen-containing silane monomer; determining the proportion of the initial material according to a silicon resin R/Si value of 1.0-1.3, dropwise adding the initial material into a flask adding with water, weak-polarity solvent and HCl gas absorbent at 5-20 DEG C, carrying out hydrolysis reaction for 3-6 h, concentrating, separating a resin layer, carrying out reflux curing reaction at 80-120 DEG C for 2-5 h, washing with water, filtering, removing solvent for hydrolysis by decompression at 110-140 DEG C, and discharging when the cone-plate viscosity of the product is 1,500-3,000 CP at 60 DEG C. The organic silicon perfusion resin has no rapid heat release, does not generate bubble in the curing process and has higher heat resistance and excellent corona resistant performance.

The invention relates to an oil extraction wastewater polymer preparation processing method; reducing substances Fe<2+> and S2 causing serious influence on polymer solution viscosity in oil extraction wastewater are oxidized by an oxidant, sulfate reducing bacteria in the oil extraction wastewater is killed, organic matters in the oil extraction wastewater are absorbed by use of strong lipophilicity and super strong adsorption property of a diatomite filter, suspended impurities in the oil extraction wastewater can be removed by filtration, and high valent metal cations casing great influence on preparation polymer solution viscosity can be removed by ion exchange resin equipment. According to the oil extraction wastewater polymer preparation processing method, suspended matters, oil, the organic matters, the sulfate reducing bacteria, the high valent metal cations and the like causing serious influence on polymer solution viscosity in the oil extraction wastewater are removed, the initial viscosity of polymer solution prepared by the wastewater is improved, and the stability of the viscosity of the polymer solution is guaranteed.

The invention provides a filling powder used for plywood, which uses a technical scheme that: 45%-55% of heavy calcium carbonate, 30%-35% of pregelatinized starch, 3%-5% of cereal element powder and 5%-10% of wood powder are placed in a stirrer according to proportion, stirred and mixed to produce the filling powder. The filling powder used for plywood is a green environmental protection functional material with no toxicity, no flavour, fire resistance, deterioration resistance and mildew resistance. After mixing with a resin adhesive, the filling powder has the advantages of good cohesiveness, suspensibility, dispersibility, fluidity, adsorptivity and thixotropy. The solid content of the filling powder is higher than that of industrial flour, the price of the filling powder is lower than that of the industrial flour. The filling powder used for plywood is a mixture which has the advantages of simple production process, less investment equipment, convenient operation and large production capacity.

The invention discloses an aqueous sealing adhesive emulsion and a preparation method thereof and belongs to the technical field of adhesives. An aqueous sealing adhesive prepared by the emulsion is high in adhesion strength, high in heat resistance and excellent in freezing resistance. The aqueous sealing adhesive emulsion is prepared from the following components in parts by weight: 15-20 partsof polyvinyl alcohol, 2-3 parts of sodium hydrogen carbonate, 15-20 parts of an emulgator, 3-4 parts of an initiator, 300-500 parts of butyl acrylate, 100-300 parts of vinyl acetate, 10-20 parts of acrylic acid-2-hydroxy ethyl ester, 1-2 parts of acrylic acid, 1-2 parts of N-dodecyl mercaptan, 0.5-1 part of sodium hydrogen sulfite, 0.5-1 part of a defoaming agent, 2-3 parts of an anticorrosion agent and 450-500 parts of deionized water. The aqueous sealing adhesive prepared by the aqueous sealing adhesive emulsion can be effectively applied to edge sealing or opening lapping of BOPP/paper, polishing/paper, PET/paper, paper/paper, ink/paper and UV polishing/paper.

The invention relates to the technical field of coating materials, particularly to a thick coating type aqueous epoxy zinc-rich anticorrosive coating material and a preparation method thereof, whereinthe thick coating type aqueous epoxy zinc-rich anticorrosive coating material comprises a component A and a component B, the component A comprises, by mass, 5-10 parts of a curing agent, 0.5-2 partsof a dispersing agent, 0.05-1 part of a defoaming agent, 0.5-5 parts of a thixotropic agent A, 0.5-5 parts of a thixotropic synergist BYK-P 2720, 60-83 parts of zinc powder, and 8-20 parts of a cosolvent, and the component B comprises, by mass, 55-80 parts of an epoxy resin emulsion, 10-35 parts of water, 5-10 parts of a thixotropic agent B, and 5-10 parts of a thixotropic blocking agent BYK-P 2710. The thick-coating type waterborne epoxy zinc-rich anticorrosive paint disclosed by the invention has excellent sagging resistance, adhesive force, salt spray resistance and impact resistance.

The invention relates to a masonry mortar plasticizer which consists of aged powder, polyoxyethylene ether sodium sulfate, water-soluble polyvinyl alcohol, polyacrylamide, oil cake powder and plant stem leaf powder, wherein the preparation method of the masonry mortar plasticizer comprises the following steps of: preparing the aged powder, the plant stem leaf powder, the oil cake powder, the polyoxyethylene ether sodium sulfate, the water-soluble polyvinyl alcohol and the polyacrylamide, burdening the aged powder, the plant stem leaf powder, the oil cake powder, the polyoxyethylene ether sodium sulfate, the water-soluble polyvinyl alcohol and the polyacrylamide according to proportions, evenly mixing and packaging to obtain the masonry mortar plasticizer product. A great amount of sites for stacking harmful waste can be saved, the expense of managing the industrial wastes is saved, the pollution of the industrial wastes to air, water body and soil and the consumption of cement is reduced, and the natural building materials such as lime, mountain flour and bentonite are saved. The masonry mortar plasticizer and the preparation method thereof disclosed by the invention have the advantages of advanced process, energy saving and environment friendliness, low prices and good quality of the product, reduced environment pollution, enhanced resource utilization ratio and remarkable economic and environment-friendly significances.

The invention discloses an environment-friendly glue for a corrugated board high-speed production line. The glue is characterized by being prepared from the following raw materials by weight: 70% of water, 26.3% of corn starch, 1.8% of alkali lye, 0.5% of borax and 1.4% of a bridging agent. For the environment-friendly glue used for the corrugated board high-speed production line, the viscosity of a gluing machine is 18 s, the gelatinization temperature of the gluing machine is 56 DEG C, the viscosity of a single-side machine is 16 s, and the gelatinization temperature of the single-side machine is 58 DEG C. The invention also discloses a preparation method for the environment-friendly glue used for the corrugated board high-speed production line. The environment-friendly glue provided by the invention has the characteristics of low preparation and usage temperature, high adhesive strength, quick-drying performance, environment-friendliness and low usage cost; and the preparation method has the advantages of reasonable technology, easiness, low preparation temperature and capacity of improving adhesiveness of the adhesive glue.

The invention discloses a production method of a waterproof and freezing-tolerant white emulsion. The production method comprises the following steps: mixing dibutyl phthalate with octyl alcohol, and stirring till the dibutyl phthalate and the octyl alcohol are dissolved for later use; adding water into a reaction kettle with a jacket, heating to 60 to 80 DEG C, adding polyvinyl alcohol during stirring, heating to 90 DEG C, and preserving the heat till the polyvinyl alcohol is completely dissolved; injecting cold water into the jacket of the reaction kettle to cool the liquid in the kettle to 66 to 69 DEG C, and adding vinyl acetate during stirring; adding the octyl alcohol solution of the dibutyl phthalate into the reaction kettle, then adding ammonium persulfate, performing uniform stirring, mixing the components at 66 to 69 DEG C for 1 to 2 hours, so as to obtain white viscous vinyl acetate white emulsion, and packaging the white emulsion with a glass bottle or a plastic bottle. According to the production method of the waterproof and freezing-tolerant white emulsion, the production process of common white emulsion is improved; by adding of a modifier, the modified white emulsion which is not gelatinized at low temperature is obtained; when compared with the common white emulsion, the modified white emulsion has the advantage that the water resistance, the heat resistance and the freezing tolerance are all obviously improved.

The invention relates to an environmental-friendly double-component polyurethane adhesive, and belongs to the technical field of polyurethane. The adhesive is prepared from a component A and a component B in a mass ratio of 1:(5-1), wherein the component A is prepared from the following raw materials in percentage by mass: 3-6% of polypropylene oxide diol, 12-20% of polypropylene oxide triol, 15-25% of polypropylene oxide tetrol, 5-10% of a chain extender, 0.3-2% of a coupling agent, 30-60% of packing, 0.2-0.5% of a thickening agent, 0.05-0.8% of a catalyst and 0.2-0.8% of water; the component B is prepared from the following raw materials in percentage by mass: 30-50% of diphenyl methylene diisocyanate, 20-47% of polymethylene poly-phenyl isocyanate and 3-5% of a plasticizer. The environmental-friendly double-component polyurethane adhesive provided by the invention is mainly used for binding substrates and is applicable to adhesion of stainless steel plates, aluminum alloy plates, inorganic calcium silicate boards and rock wool plates, the component A and the component B are mixed according to a ratio and are subjected to chemical cross-linking reactions, and excellent properties of high initial viscosity, high curing speed and good binding properties are achieved.

The invention discloses a thickening composition for an adhesive for plywood. The composition is prepared from the following raw materials in parts by weight: 60-100 parts of flour, 30-50 parts of lignin, 30-50 parts of tapioca flour, 3-5 parts of polyvinyl alcohol, 3-5 parts of silicon aluminide and 5-10 parts of a mildew preventive. The invention further discloses a preparation method of the thickening composition for the adhesive for plywood. The preparation method comprises the following steps: A, thermally dissolving polyvinyl alcohol; B, mixing the flour, lignin and tapioca flour in proportion to obtain a mixture; and C, adding the mildew preventative into the mixture in the step B, and then dropwise adding polyvinyl alcohol and silicon aluminide while stirring. The tapioca flour is good in viscidity, so that the composition has very strong adsorbability. Lignin and a wood veneer have relatively strong affinity. The flour is more flexible due to polyvinyl alcohol. According to the composition disclosed by the invention, not only is the production cost lowered, but also the adhering property is further enhanced.

The invention relates to the field of solar cell encapsulation adhesive films and discloses a resin composition. The resin composition is characterized by containing polyolefin, a cross-linking initiator, a coupling agent and a tackifier, wherein the tackifier contains a (methacrylate) acrylate oligomer and a (methacrylate) acrylate monomer. The solar cell encapsulation adhesive films prepared from the resin composition disclosed by the invention are not prone to bubbling during lamination and viscous adhesive overflow at edges.

The invention provides a preparation method for a self-adhesive PVC floor. The self-adhesive PVC floor comprises a PVC substrate layer, a UV treatment layer, an adhesive layer and a protective paper layer. The preparation method comprises the following steps: S1, preparation of the PVC substrate layer; S2, preparation of the UV treatment layer; S3, preparation of a rough friction surface; S4, preparation of protective paper; and S5, preparation of the adhesive layer. According to the invention, an acrylate emulsion is polymerized by adopting acrylic acid and methacrylic acid with a mass fraction of 2% to 5%, so oil resistance, solvent resistance and adhesive strength of the acrylate emulsion are significantly improved; freeze-thaw stability of the emulsion and wettability of the emulsion to a pigment filler can be improved; the polymerized emulsion can be endowed with the characteristic of thickening; meanwhile, through addition of different varieties of filling materials with different parts by mass and various auxiliary agents with different parts by mass, a floor adhesive is optimized; a PVC floor adhesive with good initial viscosity and high bonding strength is prepared; and the service life of a PVC floor is prolonged.

The invention discloses a mixed loading emulsion explosive used for upward hole charge and a preparation method of the mixed loading emulsion explosive, the preparation steps comprise steps of (1) preparation of a mixed loading emulsion matrix: an ammonium nitrate water phase is heated, an oil phase is taken for heating, the ammonium nitrate water phase and the oil phase are mixed and stirred, andthe mixed loading emulsion matrix is prepared; (2) mixing of the mixed loading emulsion matrix and a cross-linking agent: the mixed loading emulsion matrix and the cross-linking agent are mixed; (3)mixing of a PEG/SiO2 shear thickening liquid: the emulsion matrix and a PEG 600 solution containing nanometer SiO2 are mixed; (4) tail end static sensitizing: the mixed emulsion matrix is subjected tostatic sensitizing at the charge tail end through a sensitizing agent, and the mixed loading emulsion explosive used for upward hole charge is formed. The mixed loading emulsion explosive prepared with the method has higher viscosity at the charge initial stage, crosslinking solidification is combined, the emulsion explosive is not easy to fall from explosive holes, material waste is reduced, andthe energy and the resource are saved.

The invention discloses a water-based formaldehyde-free adhesive as well as a preparation method and application thereof. The method comprises the following steps: (1) dissolving a water-soluble poly-multistructure compound in water at 0-200 DEG C to obtain a high polymer solution; (2) adjusting the temperature to 0-200 DEG C, adding an active auxiliary agent into the high polymer solution, adjusting the pH value to 2-10, and carrying out a stirring reaction for 1.0-72 h to obtain a hydrogel-like material; (3) reacting the hydrogel-like gel with an emulsion and a surfactant to form an emulsion/composite hydrogel system; and (4) adding a reinforcing material into the emulsion/composite hydrogel system to adjust the pH value to 2-11, and reacting to obtain the water-based formaldehyde-free adhesive. According to the invention, a water molecule, emulsion and hydrogel-like co-embedded film structure is constructed, so that the problem that a water reactive compound and a water-based compound are difficult to coexist is solved. Moreover, the prepared water-based formaldehyde-free adhesive has the effects of high stability, long activity period, toughening, water resistance, high adhesion and no formaldehyde release, and is suitable for artificial boards.

The invention discloses a low-formaldehyde high-strength adhesive and a preparation method thereof. The adhesive comprises the following raw materials: deionized water, formaldehyde, urea, polyvinyl alcohol, biomass, acetic acid, sodium hydroxide, a curing agent and tannin. The preparation method comprises the following steps: adding the deionized water and the polyvinyl alcohol to a reaction pot according to the ratio; heating to completely dissolve the polyvinyl alcohol; adding the biomass and evenly agitating after completely dissolving; dropwise adding the acetic acid to agitate after the solution is cooled; adding the formaldehyde to carry out condensation reaction; dripping the sodium hydroxide to adjust the pH value to neutral property after cooling; adding the urea to carry out amination treatment; adding the tannin and the curing agent to evenly agitate; dropwise adding the sodium hydroxide to adjust the pH value after sampling and checking out; and cooling, filtering and discharging, bulking by a barrel, so as to obtain the low-formaldehyde high-strength adhesive. An adhesive prepared by adopting a traditional technical formula is high in free formaldehyde content in general, and generates a great harm to a human body. The adhesive disclosed by the invention has the advantages of low free formaldehyde, high bonding strength, rapid curing, low cost and the like according with the standards.