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The color of water-based pu resin and ph

by:Sinograce Chemical     2020-07-18
Waterborne pu resin color: water-based pu resin when synthesis due to the difference between raw materials, formulation of different effects, such as color from white, white, transparent and shining brilliantly in the different colors. Also can add the water-based paint according to different requirements, so that the emulsion show different colors. Such as glass fiber in the process of infiltration, can add different pigments, makes the glass fiber is more beautiful. Test in PET film on the adhesive properties, due to the dry pu resin film is transparent, is not conducive to observation and test, add some paste can make coating intuitive convenient after test. Waterborne pu resin smell: generally speaking, aqueous pu resin is not excitant odour, only the flavour of resin, cationic waterborne pu resin can smell a mild acidity, like white vinegar flavor. In addition to some industry such as cosmetics industry of nail polish, tattoo stickers, etc. , can also add spices in aqueous pu resin, make the product has a special aroma. Waterborne pu resin viscosity: water-based pu resin concentration gradient range is very wide, low viscosity of water can generally flow property, large enough to as viscous and toothpaste. If need to spray, viscosity cannot too big, otherwise will block the spray gun, construction of trouble; Doing the composite sponge and cloth or sponge flocking ( Puff flocking) Need to consider to glue to infiltrate in the case of sponge, just need to make through adjusting the viscosity of pu resin can stay on the surface of sponge, such effect is best. Do ceramic tile, floor, wall crack seam an agent, because the gap is much bigger than the sponge aperture, need through thickening agent into the pu resin like toothpaste, there can be no liquidity. Waterborne pu resin solid content: water-based pu resin solid content, generally not more than 50%, in the 30 - 40% is in the majority, this also is helpful for production and transportation. Waterborne pu resin can be arbitrary proportion miscibility with water and, for some textile finishing, need to dilute aqueous pu resin dozens of times and even more, and then put the fabric infiltrate into aqueous pu resin emulsion, after drying can obtain some special performance ( The fluff and improve handle, highlighting, etc. ) 。 PH: water-based pu resin anion waterborne pu resin, pH> 7; Nonionic waterborne pu resin, pH = 7, mainly for waterborne pu resins used in the electrolyte resistance requirement; Cationic waterborne pu resin, pH < 7, according to acidic environments, such as acid latex blending with other, you can choose cationic waterborne pu resin. Aqueous pu resin film hardness: water-based pu resin can adjust the formula through the membrane can adjust to hard from soft, tough and strong, soft the elongation at break of more than 1500%, the hardness can reach more than 2 h, most of the waterborne pu resin film-forming temperature requirements is not very high, also can film at low temperature. Waterborne pu resin curing agent: how isocyanate curing agent or n propyl organism curing agent, etc. , for has the requirements such as water resistance, solvent resistance, heat resistance, and can not reach the requirements of the waterborne pu resin itself, by adding curing agent can effectively improve resistance to water, alcohol and other performance. Waterborne pu resin related auxiliaries: main use of additives on viscosity of aqueous pu resin to adjust the thickener used; Mixture mixing process or transportation produce bubbles use defoaming agent; Good flowing property, shrinkage cavity, etc need to add the flow flat, wetting agent, etc. ; When blended with different acid and alkaline emulsion to prevent system incompatible need to add the pH regulator; Under different scenarios on membrane drying speed requirement is different, you need to add film-forming additives or increase the drying rate of low boiling point solvent. Waterborne pu resin drying speed: because it is water, evaporation of moisture as organic solvent volatilization of fast, so the water-based pu resin drying speed is slow, also drying speed and the thickness of the coating, environmental temperature and humidity. Coating is too thick, the surface layer to form a dense film after drying, thus greatly affect the internal evaporation of water molecules, which need more time to dry completely. The high temperature, water molecules to move faster, quicker to the flow of environment, speed up the drying; Humidity is too high, the diffusion of water in the water molecules in the inhibition of pu resin molecules, so as to reduce the drying speed. Waterborne pu resin price: this may be our more concerns, some consumers just heard of water-based pu resin is good, then went to buy water-based pu resin. Hot of water-based pu waterproof coating on the market, for example, prices in a few yuan per kg, this kind of waterproof coating in the brand of water-based pu, rub the heat of the waterborne pu. This kind of waterproof coating have a plenty of water-based pu resins and other polymer emulsion phase mixed, some don't contain aqueous pu resin. Truly pure aqueous pu resin prices generally in more than 20 per kilogram, performance requirements of high price will be higher.
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