34results about How to "Enough viscosity" patented technology

The invention relates to a fracturing fluid capable of resisting low pH value environment and higher salinity and a preparation method thereof. Most conventional fracturing fluid can have favorable viscoelasticity only in an alkaline environment, and the natural vegetable glue used under normal conditions is difficulty for crosslinking under acidic conditions. The preparation method comprises the following steps: uniformly mixing a viscoelastic surfactant, an acid and a dispersion pour-point depressant to form a liquid component mixture; and dissolving a water-soluble nonionic polymer thickener at normal temperature, adding the liquid component mixture, and stirring uniformly to obtain the fracturing fluid. Under the condition of not using any crosslinking agent, the vermiform accumulation of the viscoelastic surfactant is utilized to coat the linear high-polymer part inside the viscoelastic surfactant, so that the linear high polymer generates the crosslinking-like effect due to the existence of the viscoelastic surfactant when meeting the acid and shrinking. The fracturing fluid has high viscosity in a neutral environment due to the linear high polymer, and thus, can not have the solid carrying capacity due to greatly lowered viscosity under acidic conditions.

The invention provides a preparation method and application of a papermaking coating styrene-acrylic latex. The preparation method comprises the following steps: (1) evenly mixing 5-40 wt% of initiator, 10-50 wt% of emulsifier and 5-30 wt% of water, and adding 50-80 wt% of mixed monomers to obtain a homogeneous emulsion A, wherein the mixed monomers are composed of (methyl) acrylate, (methyl) styrene and (methyl) acrylic acid; and (2) reacting acrylic resin, the rest of initiator, the rest of emulsifier, the rest of mixed monomers and the rest of water, dropwisely adding the homogeneous emulsion A obtained in the step (1) to react, adding a starch water solution, continuing the reaction, and neutralizing with an alkaline matter until the pH value is 6-9, thereby obtaining the papermaking coating styrene-acrylic latex. By using the method of adding the acrylic resin through the kettle bottom and adding the coating starch subsequently, the bonding property of the styrene-acrylic latex is greatly enhanced, and the smoothness of the coated paper is improved.

The invention discloses a die-casting forming method free from shrinkage cavity and shrinkage porosity defects for a thick wall die-casting fitting. By the adoption of the method, the problems of shrinkage cavity, shrinkage porosity and air hole defects which are likely to happen to a thick wall aluminum alloy die-casting fitting frequently can be solved effectively. The die-casting forming method includes the main contents that a specific pouring method with the low superheat degree is adopted, large fullness pouring with the pressure chamber fullness being 60%-70% is used, the high-pressure mold filling die-casting technique is utilized, and the internal compactness zero-defect performance of the die-casting fitting is achieved. The local pressurization structure is added in mold design, and pressurization feeding at the thick wall position far away from the position of an inner casting gate is realized. By the adoption of the method, the casting defects of the thick wall die-casting fitting can be reduced, the rejection rate of products is lowered, material wasting is avoided, cost is reduced and benefits are increased.

The invention provides a method for preparing an insulating foam glass ceramic material from lithium tailings. The method comprises the following steps: 1, the lithium tailings and cleaned cullet aresubjected to wet ball milling, dried and sieved by a 120-200-mesh sieve respectively; 2, the lithium tailings, the cullet, sodium fluoride, potassium carbonate and mirabilite are uniformly mixed in percentage by mass to serve as a base material; 3, a foaming agent is added to the base material, and a mixture is obtained; 4, uniformly mixed powder is placed into a refractory container, heated rapidly to 800 DEG C, then heated to 900-1050 DEG C at reduced rate for melting foaming, and subjected to heat preservation for 15 min; 5, after heat preservation, quenching is performed to 500-600 DEG C for annealing treatment for 1 h, slow cooling is performed, and a product is obtained after demolding and cutting. Through adoption of the method, the environmental problem in the slag treatment process is solved, production cost of the product is reduced, the product with high added value is prepared, and compared with other products, the product has high strength and good insulating performance.

Disclosed herein is a pre-fiber composition comprising: a) a first fiber component having a first melting point; b) a second fiber component having a second melting point; and c) a gelling agent that combines the first fiber component or the second fiber component Solvation of at least one of the two fiber components, wherein the gelling agent substantially reduces copolymerization of any one component of the composition. Also disclosed herein is a fiber comprising: a) at least two amide-based polymers, each having a melting point, wherein one amide-based polymer has a different melting point than the second amide-based polymer; and b) a gelling agent compatible with at least one of said amide-based polymers, wherein said fibers have two distinguishable melting points substantially similar to those of said amide-based polymers Each melting point. Disclosed herein is a method of producing a pre-fiber composition comprising: a) providing a first fiber component having a first melting point; b) providing a second fiber component having a second melting point, wherein the first melting point and the second melting point are different c) providing at least one gelling agent; and d) mixing the first component, the second component, and the at least one gelling agent such that the composition has sufficient viscosity and sufficient melt strength so that it can be Spinning forms fibers, and the first and second melting points of the fibers are substantially similar to their original values ​​prior to blending.

A non-benzene gold blending oil consists of resin, solvent and printing ink accessory. It has good viscosity and wetting ability, better transparency, quick drying and curing performances.

The invention discloses a thick-coating quick-drying cold-spraying zinc sealing agent. The sealing agent comprises an agent A and an agent B, wherein the agent A at least comprises the following components in parts by mass: 20 to 30 parts of phenol; 25 to 35 parts of paraformaldehyde; 30 parts to 40 parts of diethylenetriamine; 20 to 25 parts of thiourea; and 1 to 2 parts of an accelerant; and the agent B at least comprises the following components in parts by mass: 30 to 50 parts of epoxy resin; 30 to 60 parts of a solvent; 0.5 to 2 parts of a cosolvent; 1 to 2 parts of a coloring agent; 0.5 to 1.5 parts of a defoaming agent; 20 to 50 parts of a curing agent; and 0.1 to 1 part of a supramolecular auxiliary agent. according to the invention, a step-by-step coating method is adopted, and the rapid curing effect of the agent A on epoxy resin and the permeation effect of the agent A on the cold-sprayed zinc layer are utilized, so that the firm combination of the epoxy resin sealing layer and the cold-sprayed zinc layer and the compactness of hierarchical curing are realized, and the rapid spraying of a thicker sealing layer can be realized.