30results about How to "Good self-drying" patented technology

The invention relates to water-based self-drying acrylic modified epoxy ester resin emulsion and a method for preparing the same. The water-based self-drying acrylic modified epoxy ester resin emulsion is prepared from raw materials including, by weight, 5-9 parts of reactive emulsifiers I, 6-14 parts of reactive emulsifiers II, 0.3-0.9 part of sodium bicarbonate, 3-9 parts of acrylic monomers, 30-50 parts of epoxy ester, 0.1-1.7 parts of initiators and 30-50 parts of deionized water. The water-based self-drying acrylic modified epoxy ester resin emulsion and the method have the advantages that the method for preparing the water-based self-drying acrylic modified epoxy ester resin emulsion is extremely low in solvent dosage, the reaction temperatures are easy to control, the water-based self-drying acrylic modified epoxy ester resin emulsion prepared by the aid of the method contains the reactive emulsifiers, single components in the water-based self-drying acrylic modified epoxy esterresin emulsion can be voluntarily cured at the room temperature, and paint films are excellent in self-drying, adhesion, water resistance and salt fog resistance.

The invention discloses dedicated quenching oil capable of enabling large module gears to automatically blacken after quenching and a preparation method of quenching oil, and belongs to the technical field of heat treatment. The quenching oil comprises the following components in parts by mass: 35 to 40 parts of refined base oil, 5 to 8 parts of a cooling compound agent, 0.4 to 0.6 part of a blackening compound agent, 0.3 to 0.7 part of a brightening agent, 0.5 to 0.7 part of a surfactant and 0.03 to 0.05 part of an antioxidant. The quenching oil provided by the invention particularly has a good quenching effect on the large module gears (gears of which the module is 10 mm or above), the deformation can be effectively controlled, ideal hardening layer depth, center hardness and metallographic structures are obtained, the mechanical strength and toughness required by the gears are achieved, the automatic blackening effect of the surfaces can be achieved, the two procedures of heat treatment and surface treatment of metals are perfectly combined, the resources are saved, and the timeliness is improved.

The invention discloses a synthesis process for air-drying waterborne polyurethane and dispersion thereof. The process comprises the following steps: (1) mixing diisocyanate and polymer polyol to react to obtain a polyurethane prepolymer; (2) controlling the temperature to 60-80DEG C, dripping hydrophilic chain extender A and chain extender B into the polyurethane prepolymer; carrying out reflux reaction for 1-5 hours; then adding alkali to form salt; and adding water to disperse and emulsify; and adding catalyst to obtain the air-drying waterborne polyurethane dispersion. The synthesis process is characterized in that dry oil grease structure containing active methylene is introduced in the polyurethane structure to synthesize air-drying waterborne polyurethane dispersion with good self-drying performance and water tolerance. The air-drying waterborne polyurethane dispersion can carry out self cross linking in the air after drying catalyst is added so as to quicken moisture to volatilize, and the drying rate is obviously improved. The air-drying waterborne polyurethane dispersion has the advantages of abundant raw material resource, simple synthesis technology and wide application prospect in the building coating field, is cheap and easy to obtain and is easy for industrial production.