General knowledge of coating: application method and effect of white emulsion

Core tip: product quality index Appearance: milky white, free of particles and foreign matters PH value 4~6 Viscosity (MPa S, 25 ℃) above 250000 Solid content (%) 46-50 Ash content (%) < 0.15 The film can be made into a colorless transparent continuous skin film Bonding strength (n / cm2) ≥ 2077 (normal) ≥ 759 (water resistance) Gelation temperature is not higher than (℃) 2 Usage and effect: White emulsion can be diluted with water properly according to different bonding objects When diluting, it is better to add 30-40 ℃ warm water instead of cold water Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Coating home news: product quality index appearance: milky white, no particles and foreign matters pH value 4-6 viscosity (MPa S, 25 ℃) more than 250000 solid content (%) 46-50 ash content (%) < 0.15 film forming property can be made into colorless transparent continuous skin film adhesion strength (Newton / cm2) ≥ 2077 (normal) ≥ 759 (water resistance) gelation temperature is not higher than (℃) 2 Usage and effect: when white emulsion is used, it can be diluted with water properly according to different bonding objects When diluting, it is better to add 30-40 ℃ warm water instead of cold water When gluing wood, the amount of gluing can be determined according to the specific use, generally gluing on two gluing surfaces After bonding, place it for a while, and then press it for 3 hours with a pressure of 3-5 kg / cm2 At this time, the strength can reach about 70-80% of the bonding strength It takes 8-16 hours to cure completely If the method of heating curing is adopted, the curing time can be shortened, usually at the pressure of 3-5 kg / cm2, and the curing temperature is about 80 ℃ The thin plate only needs to be pressed for a few minutes, while the thick plate needs to be pressed for a proper extension of time Main use: This product is mainly used for pasting ordinary wood, veneer, stickers, plywood, synthetic board fiberboard and fireproof board, and for gluing wood processing, paper, cloth, leather, ceramics and other industries Packing and storage of this series of products are packed in plastic barrels with a net weight of 50kg The product should be stored in a closed place in the shade, not exposed to the sun or frozen in the open The recommended storage temperature is 10-35 ℃ The shelf life of this product is half a year 1 Application: this agent is a white emulsion composed of vinyl acetate, polyvinyl alcohol, dibutyl phthalate, octanol, ammonium persulfate, etc it is widely used for bonding wood, plywood, cement mortar, paper, cloth, leather, etc it is easy to use, with strong adhesion and simple production process The disadvantage is poor performance at low temperature 2 Raw material (1) vinyl acetate: also known as vinyl acetate, referred to as vinyl acetate, colorless flammable liquid It has a strong fragrance Its vapor is irritating to the eyes Insoluble in water, soluble in most organic solvents It is used to make vinyl ester and synthetic fiber Also used for making rubber, paint, adhesive, etc Used as an adhesive in this agent (2) Polyvinyl alcohol: a high molecular compound formed by saponification of polyvinyl acetate White or cream powder Thermoplastic According to the degree of saponification, the product can dissolve in water or only swell It is mainly used as the raw material of polyvinyl acetal resin, as well as binder and dispersant This agent is used as adhesive Select industrial products (3) Dibutyl phthalate: colorless liquid Insoluble in water, soluble in ethanol, ether and other organic solvents It is a plasticizer for making plastics, synthetic rubber, artificial leather, etc It is also the solvent and curing agent of fragrance Used as plasticizer in this agent Select industrial products (4) Octanol: octanol has n-octanol and various isomers This is 2-ethylhexanol-1 Colorless liquid with special smell Soluble in water, ethanol, ether and other organic solvents This agent is used as a solvent Select industrial products (5) Ammonium persulfate: colorless monoclinic crystal Sometimes light green, soluble in water When heated, it decomposes and has strong oxidation Used as bleaching agent, oxidizer, deodorizer, etc This agent is used as polymerization initiator Select industrial products 3 Formula (weight%) vinyl acetate 45 polyvinyl alcohol 5 dibutyl phthalate 4 octanol 1 ammonium persulfate 0.1 water 44.9 4 Preparation method (1) mix dibutyl phthalate and octanol according to formula amount, stir to make it dissolve (2) Add water into the container, heat to 70 ℃, add polyvinyl alcohol under stirring, heat to 90 ℃, keep warm until all dissolved After dissolution, stop heating to reduce the temperature to 66-69 ℃, and add vinyl acetate under stirring (3) adding the solution (1) to the solution prepared by (2) steps, adding ammonium persulfate, stirring and mixing uniformly, and then polymerizing at 66~69 degrees, so that the white latex can be obtained 5 The use method is different from that of the bonding object The original solution can be used directly, or it can be used after appropriate dilution When diluted, the emulsion should be heated to 30~40 degrees centigrade and slowly added to distilled water at 30~40 degrees centigrade, so that it should not be diluted with cold water The amount of water added should be 20-30% of the original solution If too much water is added, the emulsification will be destroyed, which will lead to failure After dilution, starch paste and other thickeners should be added Different bonding objects can be directly used as the original solution or used after appropriate dilution When diluted, the emulsion should be heated to 30~40 degrees centigrade and slowly added to distilled water at 30~40 degrees centigrade, so that it should not be diluted with cold water The amount of water added should be 20-30% of the original solution If too much water is added, the emulsification will be destroyed, which will lead to failure After dilution, starch paste and other thickeners should be added Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,