News Details
Crosslinking agent for waterborne coatings for wood
2017-7-3 23:23:56
Crosslinking agent for waterborne coatings for wood
Chinese name: Diethyl toluene diamine(DETDA)
Wood coatings of oil to water, further technology mainly face the following challenges: one is the insufficient film hardness, 2 it is difficult to achieve closed effect, three is lumber bilge muscle problems, four drying process is greatly influenced by the environment. The reporter of China chemical newspaper understands that the performance of coating is mostly made by resin.
The waterborne properties and cost of waterborne resin are the key to the waterborne properties of wood coatings. As the amount of water-based coating is increasing in the future, the water-based coloring system will become more mature.
It is understood that waterborne coatings and oil paints mainly differ in solvents. Coating film, flow and fluidity, film properties are closely related to the solvent. Solvent oil paint variety, visual needs to adjust the solvent, and only water and a small amount of solvent, water-based coatings to meet the oily coating film forming, flow and flow flat, you need to add additives.
Theoretically, water-based emulsions can obtain better physicochemical properties than oil systems because they have higher relative molecular weight. But because the raw materials of the oil system have been fully developed, technical researchers can obtain high performance coating through special raw material selection or additives.
Water-based products, by contrast, also is not very rich, nor the performance of the emulsion is available, the correct use of film-forming agent, collocation is suitable for the auxiliary system to improve the film performance is critical.
It can be predicted that as the process of oil transfer accelerates, a batch of new membrane auxiliaries, rheological agents, fluidic agents, crosslinking agents and functional fillers will emerge.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
The field that furniture USES is different, the coating performance requirement is different. For example, outdoor furniture requires coating water and water white, which requires high resistance and flexibility. The interior furniture has high requirements for hardness, appearance, chemical resistance and mechanical properties. This requires a specific choice of different resin systems to enter the formulation design.
From the perspective of resin, oil paint resin also has many categories, such as nitrocellulose lacquer, PU paint, UV paint, etc. Before wood coatings using resin are mostly acrylic emulsion, although the cost is low, quick drying, grinding, but the performance of a single, it is difficult to match the oily coating, so you need to have more water-based resin system to form an overall effect to replace oleoresin.
How to improve performance, lower the sensitivity of the film to the environment in the drying process, how to solve the problem of heave reinforcement, how to improve the wettability of water-based resin for wood, are subject to solve resin suppliers. The PUD, PUA, water-based UV and water-based bi-component systems have been successfully developed.
Due to different solvents, the demand of waterborne coatings on the shading system is very different from that of oil-based coatings, which results in the development and development of water-based coloring system.
Chroma is the color scheme of transparent color in the coating industry, which plays an increasingly important role in the application of waterborne coatings. Good water-based color concentrate needs not only has good compatibility with waterborne coatings, but also to use toner has good fire resistance, temperature tolerance, high color migration and enough brilliance, has all the characteristics of the solvent products, in the performance can be better user acceptance.
At present, the market is used for the transparent color system of waterborne system, which mainly has acidic dyes and metal complexation. Acid dyes can react with water-based coatings with weak alkalinity and fade easily. Previous metal complexation needs organic solvents to dissolve, high cost.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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