Polyurethane coatings protect assets

Preventing corrosion

Whether cars, steel bridges, floors or furniture: Polyurethane based coatings and adhesives help to save resources. Due to their durability, coatings based on polyurethanes extend the life time of a product by protecting the surface, while polyurethane adhesives form a per-manent bond between two different substrates. Covestro has the right raw materials for all of these applications. Thanks to new technologies, coatings and adhesives can be formulated with significantly less solvent or even none at all.
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Polyurethane coatings made with Covestro raw materials efficiently and lastingly protect pipe bridges and numerous other steel constructions against corrosion.
Corrosion causes tremendous economic losses, which can add up to as much as four percent of gross domestic product in industrialized nations. The World Corrosion Organization (WCO) es-timates that without protection, annual losses in Germany alone would total some EUR 100 bil-lion. Polyurethane coatings make an important contribution to protecting assets and conserving both energy and resources.

Covestro markets raw materials for a wide range of polyurethane coatings. One main segment is waterborne coatings, including UV-curing systems, as well as grades with a high solids content. These coatings contain little or no solvent and can be applied safely and efficiently.
The main fields of application for polyurethane coatings are automotive and industrial coating, corrosion protection, the construction industry and furniture coating.

In addition, Covestro’s product line further includes waterborne raw materials for textiles, syn-thetic leather, cosmetics and wound care. A recently developed Covestro technology and busi-ness model, called INSQIN®, enables the production of coated textiles and polyurethane syn-thetics without solvents whatsoever and reduces water and energy consumption compared to conventional production methods.

Polyurethane adhesives are used mainly in the automotive, furniture and shoe industries, as well as in packaging materials. Thanks to their good bond strength, a variety of different materials could be combined. For example, thin and lightweight products, such as sandwich components, can be fabricated with less material.

Eco-efficient manufacturing

Covestro uses an energy-efficient, resource-conserving method to manufacture coating and adhe-sive raw materials, and continuously develops modern and innovative production processes to support it. One example is gas phase technology, developed for the production of the coating raw material hexamethylene diisocyanate (HDI) and used in all of the company’s HDI production plants around the world. Compared to the conventional method, it can achieve significant sav-ings on energy and solvents.

Sustainability at Covestro starts with selecting the right precursors. Consumers increasingly are deciding in favor of sustainable products, and paying particular attention to the use of renewable materials. As a response Covestro has developed Desmodur® eco N 7300, the first bio-based hardener for polyurethane coatings and adhesives. Up to 70 percent of its carbon content is de-rived from biomass, without competing directly with food production.