33results about How to "Increase structural viscosity" patented technology

The invention discloses high-performance lightweight aggregate concrete. The high-performance lightweight aggregate concrete is characterized in that: high-performance porcelain granules are taken as lightweight aggregate; and the high-performance lightweight aggregate concrete is prepared by mixing the following raw materials in proportion: 400 to 430 kg/m<3> of cement, 500 to 570 kg/m<3> of high-performance porcelain granule, 40 to 55 kg/m<3> of fly ash, 40 to 55 kg/m<3> of grounded furnace slag, 540 to 565 kg/m<3> of sand, 180 to 185 kg/m<3> of water and 6 to 10 kg/m<3> of water reducing agent, wherein the performance indexes of the high-performance porcelain granule is that stacking density is less than and equal to 700 kg/m<3>, cylinder pressure strength is greater than and equal to 6.0 MPa, strength mark is greater than and equal to 35 MPa and water absorbing capacity is less than and equal to 1.0 percent. The high-performance lightweight aggregate has the advantages that the strength is high, and workability and pumpability can meet design and construction requirements.

A toner for electrophotography, which is prepared by a method including dissolving or dispersing a toner composition including at least a binder resin, or binder resin and a binder resin precursor as a resin component; and a colorant in an organic solvent to form an oil phase; emulsifying or dispersing the oil phase in an aqueous medium to form an emulsion dispersion comprising emulsified particles; converging the emulsified particles to granulate mother toner particles, including controlling a temperature of the emulsion dispersion to control a circularity of the mother toner particles; and removing the organic solvent, wherein the resin component includes a crystalline resin in an amount not less than 50% by weight, and the mother toner particles have an average circularity of from 0.940 to 0.980.

The invention discloses a tackifier copolymerization associate used for a drilling fluid and a preparation method of the tackifier copolymerization associate. The copolymerization associate comprises a constitutional unit A, a constitutional unit B, a constitutional unit C and a constitutional unit D. The constitutional unit A is N, N-dimethylacrylamide, the constitutional unit B is N-methyl diallyl propylsulfonate (MAPS) which is an amphoteric ionic monomer, the constitutional unit C is an ionic associate of the constitutional unit B and cationic polyamine, and the constitutional unit D is starch. Based on the total amount of the copolymerization associate, the copolymerization associate comprises 6-45% by weight of N, N-dimethylacrylamide, 5-35% by weight of the N-methyl diallyl propylsulfonate which is an amphoteric ionic monomer, 2-30% by weight of the cationic polyamine, and 5-35% by weight of starch. A tackifier obtained through the preparation method can resist temperature as high as 180 DEG C, can resist a saturated NaCl solution, and resist a CaCl2 solution with the concentration being 20%. The tackifier is excellent shale inhibition and filtrate reduction.

The invention relates to a preparation method of salt-resistant carboxymethyl starch. A mixed solvent of ethanol and isopropyl alcohol serves as a reaction medium, and multi-step modification of cassava starch is performed in slurry taking the mixed solvent as a medium. The method comprises the following specific steps: swelling the starch to prepare starch milk; adding a surfactant and performing modification such as alkalization and etherification by an 'acid pretreatment process'; and adding a crosslinking agent for a micro-crosslinking reaction. In the method provided by the invention, the surfactant is added as a penetrant, the reagent molecules are promoted to penetrate and spread into the starch particles, and the alkalization efficiency and etherification efficiency are improved; the generation of side reactions can be reduced by adding an etherifying agent before an alkalizer, thus the alkalization and etherification are carried out at the same time, and more thorough etherification reaction is guaranteed; finally, the starch is subjected to micro-crosslinking so as to improve the structure viscosity and enhance the salt resistance; the product viscosity 4% exceeds 40,000, the substitution degree is over 1.0, the salt-viscosity ratio goes beyond 0.5, and the product can be applied to multiple technical fields instead of CMC.

The invention discloses a grafted starch thickening agent copolymerization association compound and a preparation method thereof. The copolymerization association compound contains a structural unit A, a structural unit B, a structural unit C and a structural unit D, the structural unit A is acrylamide, the structural unit B is an amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate (DMAPS), the structural unit C is an ion association body of the structural unit B and cationic polyamine, and the structural unit D is starch; and based on the total amount of the copolymerization association compound, the content of the acrylamide is 6-45wt%, the total content of the amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate is 5-35wt%, the content of the cationic polyamine is 2-30wt%, and the content of the starch is 5-35wt%. Temperature resistance of the thickening agent prepared by the method can reach 150 DEG C, anti-NaCl concentration is saturated, and anti-CaCl2 concentration reaches 20%; and meanwhile, excellent shale inhibition performance and filtrate loss controllability are furthermore achieved.

The present invention provides an aqueous resin dispersion having a relatively low acid value and high viscosity and structural viscosity after alkali neutralization, and a method for producing the same. A core/shell-type aqueous resin dispersion comprising a core/shell-type resin including: a core part comprising a resin (C) having an acid value of not more than 20 and a hydroxyl group value of not more than 100 and being emulsion-polymerized from a polymerizable unsaturated monomer (c) containing neither acid group nor hydroxyl group, and optionally a hydroxyl group-containing polymerizable unsaturated monomer (b), and optionally an acid group-containing polymerizable unsaturated monomer (a), and a shell part comprising a resin (S) having an acid value of 30 to 150 and a hydroxyl group value of 10 to 100 and being emulsion-polymerized from the acid group-containing polymerizable unsaturated monomer (a), the hydroxyl group-containing polymerizable unsaturated monomer (b), and the polymerizable unsaturated monomer (c) containing neither acid group nor hydroxyl group.

The invention discloses a starch-containing thickening agent copolymerization association compound and a preparation method thereof. The copolymerization association compound contains a structural unit A, a structural unit B, a structural unit C and a structural unit D, the structural unit A is N,N-dimethylacrylamide, the structural unit B is an amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate (DMAPS), the structural unit C is an ion association body of the structural unit B and cationic polyamine, and the structural unit D is starch; and based on the total amount of the copolymerization association compound, the content of the N,N-dimethylacrylamide is 6-45% by weight, the total content of the amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate is 5-35% by weight, the content of the cationic polyamine is 2-30% by weight, and the content of the starch is 5-35% by weight. Temperature resistance of the thickening agent prepared by the method can reach 150 DEG C, anti-NaCl concentration is saturated, and anti-CaCl2 concentration reaches 20%; and meanwhile, excellent shale inhibition performance and filtrate loss controllability are furthermore achieved.

The invention relates to a gypsum-based wall leveling material as well as a preparation method and a use method thereof. The wall leveling material is prepared from the following raw materials in parts by mass: 55-70 parts of semi-hydrated gypsum; 8-20 parts of fly ash; 4-8 parts of an admixture; 4-8 parts of calcium hydroxide; 3-6 parts of zeolite; 0.2-0.5 part of a water retaining agent; and 0.05-0.1 part of a retarder; wherein the admixture is selected from one or two of silica fume or metakaolin. The gypsum-based wall leveling material provided by the invention does not need cement, redispersible rubber powder and a water repellent, can also have good water resistance, can maintain good mechanical properties in a high-humidity environment, can also solve the problems of hollowing and cracking of a wall surface, and is low in cost and easier to apply and popularize.

The invention discloses a tackifier copolymerization associate used for a drilling fluid and a preparation method of the tackifier copolymerization associate. The copolymerization associate comprises a constitutional unit A, a constitutional unit B, a constitutional unit C and a constitutional unit D. The constitutional unit A is acrylamide, the constitutional unit B is N-methyl diallyl propylsulfonate (MAPS) which is an amphoteric ionic monomer, the constitutional unit C is an ionic associate of the constitutional unit B and cationic polyamine, and the constitutional unit D is starch. Based on the total amount of the copolymerization associate, the copolymerization associate comprises 6-45% by weight of acrylamide, 5-35% by weight of the N-methyl diallyl propylsulfonate which is an amphoteric ionic monomer, 2-30% by weight of the cationic polyamine, and 5-35% by weight of starch. A tackifier obtained through the preparation method can resist temperature as high as 180 DEG C, can resist a saturated NaCl solution, and resist a CaCl2 solution with the concentration being 20%. The tackifier is excellent shale inhibition and filtrate reduction.

The invention discloses a solid-phase-free clean low-damage well killing fluid and a preparation method thereof. The solid-phase-free clean low-damage well killing fluid comprises 1.5%-2.5% of a tackifier, 0.8%-1.2% of a filtrate reducer, 0.05%-0.2% of an inorganic salt crystallization inhibitor, 8%-30% of a weighting agent, 0.5%-2% of a clay stabilizer and the balance of water. The well killing fluid is used for well drilling, well repairing and other well killing operation in downhole operation, and is good in compatibility with strata, low in damage, free of pollution, adjustable in densityand good in mobility.

The invention discloses an anti-calcium tackifier copolymerization complex and a preparation method thereof. The anti-calcium tackifier copolymerization complex comprises a structural unit A, a structural unit B and a structural unit C. The structural unit A is acrylamide, the structural unit B is a zwitterionic monomer methacryloyloxyethyl-N, N-dimethylpropanesulfonate (DMAPS), and the structural unit C is an ionic complex of the structural unit B and cationic polyamine. The copolymerization complex comprises, by weight, 10 to 75% of the structural unit A, 8 to 55% of the zwitterionic monomer and 1 to 50% of the cationic polyamine, and preferably, comprises 30 to 65% of the structural unit A, 20 to 60% of the zwitterionic monomer and 3 to 40% of the cationic polyamine. The tackifier obtained by the preparation method can resist a temperature of 150 DEG C, has a saturated anti-NaCl concentration and an anti-CaCl2 concentration of 20% and has excellent shale inhibition performances and de-filtration performances.

The invention discloses a tackifier copolymerization association compound, and a preparation method thereof. 100wt% of the tackifier copolymerization association compound comprises 10 to 75wt%, preferably 30 to 65wt% of a structure unit A, 8 to 55wt%, preferably 20 to 60wt% of a structure unit B, and a structure unit C; the structure unit A is N,N-dimethylacrylamide; the structure unit B is amphoteric monomer N-methyl diallyl propanesulfonate (MAPS), the structure unit C is an ionic association compound of the structure unit B with cationic polyamine; and the amount of cationic polyamine accounts for 1 to 50wt%, preferably 3 to 40wt% of the total amount of the tackifier copolymerization association compound. The tackifier prepared via a preparation method in the invention is capable of tolerating a temperature as high as 200 DEG C, tolerating NaCl concentration as high as the saturation concentration, and tolerating CaCl2 concentration as high as 20%, and also possesses excellent shale inhibition and filtration reducing properties.

The invention discloses a preparation method of a thickening agent copolymerization association compound. The copolymerization association compound contains a structural unit A, a structural unit B and a structural unit C, the structural unit A is acrylamide, the structural unit B is amphoteric monomer N-methyldiallyl propanesulfonate (MAPS), and the structural unit C is an ion association body of the structural unit B and cationic polyamine; and based on the total amount of the copolymerization association compound, the content of the structural unit A is 10-75wt%, the total content of the amphoteric monomer is 8-55wt%, and the content of the cationic polyamine is 1-50wt%. Temperature resistance of the thickening agent prepared by the method can reach 200 DEG C, anti-NaCl concentration is saturated, and the anti-CaCl2 concentration reaches 20%; and meanwhile, excellent shale inhibition performance and filtrate loss controllability are furthermore achieved.