Four types of friendly paint coating industry future development

         At present,the development of coating industry is the first important work of four types of environmentally friendly coatings,and second,in is needed to achieve this goal,the solvent coatings also have quite a proportion of the transitional phase,in an efficient,non-toxic solvent instead of toxic solvents is an important task of the current.And starting from the concept of sustainable development,the development of renewable resources of organic solvent,it is the third task before coating of workers.
         Coating industry in the future will focus on the development of four types of environmentally friendly coatings including
         solventless coatings
         So-called solvent-free coatings,it is used in the paint a referred to as reactive solvent or reactive diluent organic solvents.It can dissolve or disperse film-forming material,but also in the process of coating film and film forming matter produces chemical reaction,formed without volatile components in coating.Because of the organic solvent in the process of coating film does not overflow,thus reducing the pollution to the environment and the poison of human body.
         Currently using solvent-free products mainly include two liquid type two-component epoxy solventless coating and acrylic uv-curable coatings.Solvent-free coatings is the development direction of expanding varieties,increase the adaptability of coating method and developing type thin coating products.
         water-based paint
         Drainage colorless,transparent,non-toxic,tasteless liquid and rich in resources.Replace the organic solvent with water as dispersion medium of coating resin,certainly will completely avoid using organic solvent from the above three aspects.So be in the development of environmentally friendly coating is a kind of important products.
         Water-based paint can be divided into Latexcoatings latex coatings and water dilution coating waterreducible two kinds big.The latex paint products are mainly used in construction of mature application emulsioni paint,water dilute coatings mainly industrial aqueous electrodeposition primer.Global paint net learned along with our country government GB185812001 "interior decoration materials:solvent wood coatings in harmful material set limit to" and GB185822001 "interior decoration materials:interior wall coating of harmful material set limit to" the promulgation of the national standards such as waterborne wood coatings are also beginning to application,and the more mature technology.
         And waterborne industrial coatings due to the water-based coating with the corresponding solvent coating performance compared to still need to improve,the cost is relatively high and have specific request for painting environment and so on,therefore,expanding the scope of the product and application of work still needs to work.
         Powder coatings
         Powder coating does not contain any volatile substances in theory,is the absolute zero VOC coating,is one of the focus on the development of environmentally friendly paint products.But is limited by certain powder coatings in expanding applications,need further improvement.For example,the manufacturing cost is higher;Need high temperature baking film;Difficult to get thin film coating.Because of the paint palette difficulty process of coating products;Poor in irregular evenly coated on the surface of the object.These need to be further research and development.
         Comprehensive above,development of the above four types of environmentally friendly coatings is the coatings workers steadfast work direction,and at the same time should also be aware of is needed to achieve this goal.
         high solid coatings
         High solid content of solvent coating HSSC is also called the VOC solvent coatings.The volume of a traditional solvent thermosetting coating NVV solids is usually about 2535%,some thermoplastic coating will be lower.
         Definition of high solid coatings,there is no unified,one idea is that in our country,high solid coatings,is the point at which the spray solids is greater than or equal to 70% of the coatings.And some idea on the international is,for car flash metallic paint or paint colors paint its high solid refers to around 45 NVV;And for high pigment of the primer,its high solid may be 50 NVV.This request is used for coating resin molecular weight and average functionality of each molecule must be reduced,to narrow molecular weight distribution.In this case at the same time to keep the function of the film remains the same,has the certain difficulty.Therefore,the research and development of new type of crosslinked resin synthesis technology and strict control of coating curing condition becomes the crux of the problem.At the same time,the realization of this kind of coating is only reduced the amount of some organic solvents.

By Nicole