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31results about How to "No thickening" patented technology

Silane modified polyurethane glass primer and preparation method thereof

The invention discloses a silane modified polyurethane glass primer and a preparation method thereof. The glass primer is prepared from the following raw materials by weight: 20 to 60 parts of silane-terminated polyurethane perpolymer, 30 to 65 parts of a solvent, 1 to 3 parts of a water-removing additive, 2 to 10 parts of carbon black, 1 to 2 parts of an anti-settling agent, 2 to 5 parts of a cross-linking promoter and 0.05 to 0.2 part of a catalyst A, wherein, raw materials for the silane-terminated polyurethane perpolymer comprise, by weight, 15 to 25 parts of polyether polyol, 12 to 24 parts of diisocyanate, 0.01 to 0.05 part of dibutyltin dilaurate or stannous octoate, 30 to 60 parts of ethyl acetate and 12 to 22 parts of an end-capping reagent. According to the invention, disadvantages of the prior art are overcome; when the silane modified polyurethane glass primer is used at normal temperature for 40 min in the air, the phenomenon of obvious thickening does not appear, and a film is not formed on the surface of the glass primer; the glass primer facilitates construction and is simple to use, and when used, the glass primer is directly poured into a container and then is directly used for brush coating within 40 min.
Owner:SHANDONG NORTH MODERN CHEM IND

Processing method and die for shaft sleeve used for automobile steering transmission mechanism

The invention discloses a processing method for a shaft sleeve used for an automobile steering transmission mechanism. In the method, an E35+N seamless steel tube is used as a parent material, a flanging die composed of a male die and a female die is used, and the shaft sleeve is manufactured by flanging each end of the seamless steel tube for three times, wherein a first flanging angle is 30-45 degrees, a second flanging angle is 45-70 degrees and the third flanging angle is 70-93 degrees; while flanging the first end, a descending speed of the male die is controlled to be 50-100 mm/min; while flanging the second end, the descending speed of the male die is controlled to be 150-200 mm/min; in each flanging process, lubricating oil is injected between the parent material and the female die through a lubricating oil hole on the male die, and simultaneously, compressed air is injected between the parent material and the female die through a cooling air hole on the male die so as to cool the parent material; one end is flanged firstly, and the other end is flanged later. The method has the following technical benefits that: at a part with an inner angle of 90 degrees, the phenomenon of thickening cannot be caused; 2, at an excircle part of the flange, the phenomenon of thickness reduction cannot be caused, and hair cracks and wrinkle the material can be effectively avoided. The method further discloses a die using the method.
Owner:SHANGHAI ZUNMA AUTO PIPE CO LTD

High-temperature-resistant drilling fluid as well as preparation method and application thereof

PendingCN111286310AAvoid percolationRheology can be easily adjusted at high temperatureFlushingDrilling compositionThermodynamicsTackifier
The invention relates to a high-temperature-resistant drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The high-temperature-resistant drilling fluid is prepared from the following preparation raw materials in parts by mass: 100 parts of water, 2-4 parts of attapulgite, 3-6 parts of an inorganic tackifier, 0.05-0.15 partof an alkalinity regulator, 0.4-1.0 part of a high-temperature-resistant polymer filtrate reducer, 3-6 parts of a high-temperature-resistant sulfonated filtrate reducer, 2-5 parts of a high-temperature-resistant anti-collapse agent, 3-8 parts of a high-temperature stabilizer and 0.3-1.0 part of a deoxidant. The drilling fluid provided by the invention has good rheological property, and can maintain stable performance under a long-term high-temperature condition; besides, the drilling fluid has good wall-building property, inhibition property and anti-pollution capability under the conditions of high temperature and high pressure, is beneficial to well wall stability, can overcome the possible influence of abnormal temperature and pressure, complex stratums and the like in deep wells and construction on the performance of the drilling fluid, and can be suitable for various drilling engineering.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN) +1

Anionic water-borne epoxy resin emulsion as well as preparation method and application thereof

The invention discloses an anionic water-borne epoxy resin emulsion and a preparation method thereof. The preparation method comprises following steps: S1, 160-200 parts of epoxy resin E-44 is added to a reaction vessel, and after heating, 210-250 parts of diisocyanate is added for a reaction; S2, 40-50 parts of polycaprolactone and 30-50 parts of small-molecule diol are added, and a heat insulating reaction is performed for a period of time; S3, 30-40 parts of dimethylolbutyric acid is added, a catalyst is dropwise added, and the heat insulating reaction is performed for a period of time; S4,content of NCO in a system is detected, when content of NCO reaches 1.5%-4.0%, 50-80 parts of epoxy resin E-51 is added, then 10-20 parts of hydrogen peroxide is added, the heat insulating reaction is performed for a period of time, and 300-400 parts of acetone is added for reducing viscosity; S5, cooling is performed, caustic soda is added for neutralization, an emulsifier is added for emulsification, and acetone is removed from the system through vacuum pumping. The anionic water-borne epoxy resin emulsion prepared with the method is milky white and fine in appearance, excellent in storagestability, mechanical stability and freeze-thaw stability, good in water resistance, high in hardness and high in adhesive force.
Owner:GUANGZHOU LEOBO PAINT TECH

High-temperature-resistant oil-based drilling fluid shear strength improving agent as well as preparation method and application thereof

The invention provides a preparation method of a high-temperature-resistant oil-based drilling fluid shear strength improving agent, which comprises the following steps: 1) emulsifying an emulsifier aqueous solution, adding a high-temperature-resistant monomer and a diene monomer, uniformly mixing, and transferring into a high-temperature and high-pressure reaction kettle; (2) dropwise adding an initiator into the high-temperature and high-pressure reaction kettle under the pressure of 4.5 MPa, stirring and reacting the mixture at a low speed under the condition of 80-110 DEG C, and then adding a reaction terminator to obtain a first product; 3) keeping the pressure unchanged, reducing the temperature of the first product to 60-80 DEG C, introducing inert gas for 20 minutes to discharge redundant gaseous diene monomers, adding carboxylic acid monomers, dropwise adding an initiator, and stirring the mixture at a low speed to react for 2-3 hours; and 4) adding a nitrogen-containing functional monomer, and carrying out low-speed stirring reaction at the temperature of 60-80 DEG C, thereby obtaining the product. The invention also provides the oil-based drilling fluid shear strength improving agent and application thereof. The oil-based drilling fluid shear strength improving agent can resist the high temperature of 240 DEG C; besides, even in a high-temperature environment, the cutting-improving effect is still achieved.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

A processing method and mold for a shaft sleeve used in an automobile steering transmission mechanism

The invention discloses a processing method for a shaft sleeve used for an automobile steering transmission mechanism. In the method, an E35+N seamless steel tube is used as a parent material, a flanging die composed of a male die and a female die is used, and the shaft sleeve is manufactured by flanging each end of the seamless steel tube for three times, wherein a first flanging angle is 30-45 degrees, a second flanging angle is 45-70 degrees and the third flanging angle is 70-93 degrees; while flanging the first end, a descending speed of the male die is controlled to be 50-100 mm / min; while flanging the second end, the descending speed of the male die is controlled to be 150-200 mm / min; in each flanging process, lubricating oil is injected between the parent material and the female die through a lubricating oil hole on the male die, and simultaneously, compressed air is injected between the parent material and the female die through a cooling air hole on the male die so as to cool the parent material; one end is flanged firstly, and the other end is flanged later. The method has the following technical benefits that: at a part with an inner angle of 90 degrees, the phenomenon of thickening cannot be caused; 2, at an excircle part of the flange, the phenomenon of thickness reduction cannot be caused, and hair cracks and wrinkle the material can be effectively avoided. The method further discloses a die using the method.
Owner:SHANGHAI ZUNMA AUTO PIPE CO LTD

Anionic water-based epoxy resin emulsion and its preparation method and application

The invention discloses an anionic water-borne epoxy resin emulsion and a preparation method thereof. The preparation method comprises following steps: S1, 160-200 parts of epoxy resin E-44 is added to a reaction vessel, and after heating, 210-250 parts of diisocyanate is added for a reaction; S2, 40-50 parts of polycaprolactone and 30-50 parts of small-molecule diol are added, and a heat insulating reaction is performed for a period of time; S3, 30-40 parts of dimethylolbutyric acid is added, a catalyst is dropwise added, and the heat insulating reaction is performed for a period of time; S4,content of NCO in a system is detected, when content of NCO reaches 1.5%-4.0%, 50-80 parts of epoxy resin E-51 is added, then 10-20 parts of hydrogen peroxide is added, the heat insulating reaction is performed for a period of time, and 300-400 parts of acetone is added for reducing viscosity; S5, cooling is performed, caustic soda is added for neutralization, an emulsifier is added for emulsification, and acetone is removed from the system through vacuum pumping. The anionic water-borne epoxy resin emulsion prepared with the method is milky white and fine in appearance, excellent in storagestability, mechanical stability and freeze-thaw stability, good in water resistance, high in hardness and high in adhesive force.
Owner:GUANGZHOU LEOBO PAINT TECH
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