9 results about "Reduced viscosity" patented technology

The present invention aims to provide a polyphenylene ether having excellent solubility in a general-purpose ketone-based solvent and a production method thereof. It also aims to provide a thermosetting composition, a prepreg, and a laminate each using the polyphenylene ether. The polyphenylene ether of the present invention is characterized by containing 5 to 85 mol% of repeating units derived from a phenol of formula (1) and 15 to 95 mol% of repeating units derived from a phenol of formula (2) relative to 100 mol% of the total of the repeating units derived from the phenol of formula (1) and the repeating units derived from the phenol of formula (2), and having a specific viscosity (ηsp / c) of 0.03 to 0.30 dL / g measured in a 0.5 g / dL concentration chloroform solution at 30°C.

The purpose of the present invention is to provide a production method with which it is possible to obtain a low-viscosity polyphenylene ether while controlling the reaction activity during polyphenylene ether production.　In order to solve the aforementioned problem, the present invention is characterized by comprising a step for introducing an oxygen-containing gas into a solution that contains a phenol represented by formula (1) and a phenol represented by formula (2) and performing oxidative polymerization, the moisture content of the oxygen-containing gas being 0.2-50 mg / L, and the reduced viscosity (ηsp / c) of the resulting polyphenylene ether measured by using a chloroform solution having a concentration of 0.5 g / dL at 30°C being 0.03-0.30 dL / g.

The application relates to the technical field of concrete, and particularly discloses early-strength and viscosity-reducing low-water-binder-ratio concrete and a preparation method thereof. The early-strength and viscosity-reducing low-water-binder-ratio concrete comprises cementitious materials, aggregates, water and an additive, the additive comprises hydroxyethyl ethylene bis-stearamide, propoxy glycerol triacrylate and ethoxy polyether modified siloxane, and the mass ratio of water to the cementitious materials is less than or equal to 0.35. The three components of the additive synergistically act on each other, the early-strength component promotes hydration, the viscosity-reducing component reduces friction, and the synergistic component stabilizes adsorption, so that the problem that the early-strength and viscosity-reducing functions of general additives added in low-water-binder-ratio concrete are mutually restricted and the compatibility of the components is poor is solved.

This invention discloses a lubricated, flow-guided gearbox for new energy vehicles, relating to the field of gearbox technology. It includes a gearbox body with a rotatable connecting shaft inside, and a gear body mounted on the connecting shaft. Power transmission is achieved through the meshing of gear bodies of varying diameters. A lubrication mechanism is internally installed within each gear body, continuously lubricating the meshing surfaces of the gear bodies by discharging stored lubricant. In this lubricated, flow-guided gearbox for new energy vehicles, when the overall temperature rises due to prolonged meshing and friction of the gear bodies, the viscosity of the lubricant decreases. At this time, the deformation baffle expands due to heat, obstructing and turbulent the flow of the lubricant, slowing its outflow speed, and preventing the reduced viscosity lubricant from splashing directly off the gear meshing surfaces under strong centrifugal force. This effectively improves the utilization rate of the lubricant under high-temperature operating conditions, reduces lubricant waste, and ensures the lubrication effect on the gear meshing surfaces under high-temperature and high-speed operating conditions.

A reduced viscosity hydrogenated styrenic block copolymer (m-HSBC) is disclosed. The polymer comprises at least one vinyl aromatic block S and at least one rubbery block R derived from hydrogenated diene units. The reduced viscosity HSBC is prepared by controlled chain scission of a high molecular weight HSBC precursor and retains a GPC main peak molecular weight (Mp) of > 200 kg / mol. The reduced viscosity HSBC exhibits an extremely low melt flow rate (MFR) of < 10 g / 10 min when measured at 190°C under a 2.16 kg load. The reduced viscosity HSBC balances controlled melt flow, elasticity, and mechanical integrity making it particularly suitable for use in foams and foam-forming compositions.

The present invention concerns a method for preparing antigen binding proteins specific for PCSK9 with reduced viscosity. The method proceeds by replacing residues in high viscosity variable domain subfamilies with residues in correlating low viscosity subfamilies. The method further comprises substituting residues in the Fc domain with residues associated with low viscosity and adding charged residues to the C-terminus of the Fc domain. The present invention further concerns antigen binding proteins produced by this method.

A reduced viscosity hydrogenated styrenic block copolymer (m-HSBC) is provided. The m-HSBC comprises at least one vinyl aromatic block S and at least one rubbery block R derived from hydrogenated diene units. It is prepared by a controlled chain scission reaction of a HSBC precursor. The chain scission process forms low molecular weight species and increases the melt flow rate (MFR). The m-HSBC has a gel permeation chromatography (GPC) main peak molecular weight (Mp) of 10-200 kg / mol, a residual unsaturation (RU) of at most 0.5 meq / g, and a melt flow rate (MFR) at 190°C / 2.16 kg of 10-2000 g / 10 min. The m-HSBC can be functionalized with anhydride, epoxy, silane, or (meth)acrylate groups. The m-HSBC or functionalized m-HSBC has a high MFR, good elasticity, and improved substrate wet-out. These materials are suitable for use in adhesives, sealants, coatings, copper clad laminates (CCL), and other melt processing applications.

The invention relates to a method for producing a high-concentration wax emulsion, comprising mixing a water phase with wax under controlled pressure and temperature to achieve a dry matter content of at least 60%, wherein the wax phase is added in separate parts each dispersed in water at a specific level of shear. The produced wax emulsion show reduced viscosity compared to comparative processes leading to a better applicability. Wax emulsions are used in woodpanels as hydrophobing agents. Furthermor, the inventors show that dilution before use improves the water repellent properties of the dispersed wax, which is particularly advantageous for the high-concentrated wax emulsion produced according to the described production method that is part of the current invention.