39results about How to "Structural stretch" patented technology

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 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.

The invention discloses a method for preparing an ester and ether copolymerized viscosity-reducing polycarboxylic acid water reducing agent. The method comprises the following steps: (1) esterified monomer preparation; (2) copolymerization; and (3) neutralization. According to the method disclosed by the invention, the ester and ether copolymerized viscosity-reducing polycarboxylic acid water reducing agent is obtained by the copolymerizationan of an esterified monomer, an ester macromonomer, 2-methacryloyl ethyl phosphocholine and unsaturated acid, wherein the esterified monomer is obtained by carrying out esterification on unsaturated polyether and 2-phosphate butane-1, 2, 4-tricarboxylic acid and mainly comprises products obtained by esterifying singe carboxyl in the 2-phosphate butane-1, 2, 4- tricarboxylic acid and esterifying double and three carboxyl in small amount of 2-phosphate butane-1, 2, 4- tricarboxylic acid; and while phosphate radical, carboxylate radical, quaternary ammonium salt and ester group are introduced into a polymer molecular structure, the polymer structure is also lightly crosslinked at the same time. The ester and ether copolymerized viscosity-reducingpolycarboxylic acid water reducing agent prepared by adopting the method disclosed by the invention has the properties of viscosity reducing, water reducing, slump loss resisting and mud resisting tosolve the problems of high viscosity, poor workability and damage rapidness caused by large mud content in conventional concrete raw materials.

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 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 discloses a temperature-resistant thickening agent copolymerization association compound and a preparation method thereof. The copolymerization association compound contains a structural unit A, a structural unit B and a structural unit C, the structural unit A is N,N-dimethylacrylamide, the structural unit B is an amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate (DMAPS), 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 N,N-dimethylacrylamide is 10-75% by weight, preferably 30-65% by weight, the total content of the amphoteric monomer is 8-55% by weight, preferably 20-60% by weight, and the content of the cationic polyamine is 1-50% by weight, preferably 3-40% 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 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 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 the technical field of concrete admixtures, in particular to a cross-linked air-entraining water-reducing agent and a preparation method thereof, wherein the water-reducing agent comprises: a cross-linked air-entraining polymer, the air-entraining polymer Contains polymers or copolymers derived from monomers including air-entraining monomers, vinyl ether macromonomers. By using the cross-linked air-entraining water reducing agent provided by the present invention, air bubbles can be introduced into the concrete and the air bubbles can be stabilized and the dispersion retention of the concrete can be improved. Not only that, the introduction of the micro-cross-linked structure makes the polymer structure more stretched and the hydration film thicker. , has greater steric hindrance and better dispersibility, dispersion retention and better anti-intercalation effect, and has broad market application prospects.

A method for removing lead and cadmium in rice dregs protein, the multiple carboxylic acid groups of complexing agent citric acid and EDTA‑2Na can effectively complex heavy metal lead and cadmium. After the rice dreg protein is treated with ethanol and hydrogen peroxide, some heavy metal lead and cadmium are complexed with citric acid in acidic conditions. After washing with water, most of the heavy metal lead and cadmium are complexed with EDTA-2Na under high temperature conditions. After repeated washing, The rice dregs protein with low content of lead and cadmium can be obtained, the contents of which are respectively 0.076 and 0.011 mg / kg, which can effectively solve the problem of excessive lead and cadmium content in the existing rice dregs protein. The invention is simple in operation and remarkable in effect, can safely and effectively remove heavy metal lead and cadmium in rice dreg protein, and is suitable for large-scale popularization and application.