Application of a new generation of waterborne two-component polyurethane coatings in large-scale vehicles

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With the increasingly demanding VOC emission regulations and the rapid growth in demand for waterborne two-component polyurethane coatings, Bayer MaterialScience (renamed Covestro) will be a new generation of waterborne two-component polyurethane coating technology in the bus, In the field of rail transit, engineering machinery, general industrial coatings and other applications, it has achieved extraordinary performance and competitive advantages. Through more environmentally friendly solutions, it helps customers to meet environmental protection requirements and meet the needs of end-user product upgrades.

Performance of waterborne two-component polyurethane coatings

Bayer MaterialScience's new generation of waterborne two-component polyurethane coating technology has matured and is comparable to traditional solvent-based coatings. In appearance, the gloss and fullness of the aqueous two-component polyurethane coatings have reached a satisfactory level, in which the gloss reaches 83.1/91.9 (20°/60°) and the developability (DOI) reaches 90.0. At the same time, waterborne two-component polyurethane coatings have a wide construction window. The Bayer MaterialScience solution is especially helpful for customers to achieve high Blister FreeFilm Thickness. At present, at room temperature and dry conditions, the dry film thickness exceeds 110um, which can meet the demanding requirements in on-site construction and has excellent weather resistance.

Extensive commercial success stories

Bayer's waterborne two-component polyurethane coatings have been commercially available for many years and have been used for many years. In the European market, from the 1990s, in order to control VOC emissions, including EU countries in Germany and France, waterborne two-component polyurethane coatings have begun to be widely used. Some market data indicate that more than 100,000 units have been used since 1992 with two-component waterborne polyurethane coatings. According to our estimation, since 2008, Bayer's waterborne two-component polyurethane coatings have been applied to more than 29,000 buses including buses, subways and trucks.

Bayer MaterialScience's cooperative development advantage

Rich product and construction experience

In cooperation with Bayer MaterialScience, customers will have the opportunity to learn about Bayer MaterialScience's complete product portfolio. A wide range of products includes: resin and curing agents, intermediate coatings, paints, topcoats and varnishes, body paints and interior finishes. In addition, Bayer MaterialScience's unique coating formulation overcomes the difficulty of bubble-free film thickness under complex construction conditions. In terms of construction experience, Bayer MaterialScience has practical experience covering the entire process of formulation design, production, spraying and tracking testing.

Efficiency advantage

Bayer MaterialScience has rich experience in research and development of waterborne polyurethane coatings and a team of domestic and foreign technical experts, so that we can help customers formulate formulas and construction techniques according to local conditions. By working with Bayer MaterialScience, the development cycle can be significantly shortened, saving an average of more than one year of development time.

to sum up

The combination of traditional solvent-based coatings and water-based two-component polyurethane coatings is an inevitable trend in the future, combining various factors including policies and regulations and market demand. How to effectively transition through the transition phase and post-transformation development is something that major paint manufacturers and OEMs need to think about and plan. From the cooperation with Bayer MaterialScience, customers not only can obtain high-quality raw materials, rich formula selection and experience sharing, but also get a series of solutions that exceed the product itself, including stable supply and customized cooperation plans.

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