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Dimeric TDI for water-borne polyurethane dispersions with improved physical properties

Published on 2009-04-15. Author : SpecialChem

Solid dimeric toluene diisocyanate is a versatile additive for PU coatings, adhesives and sealants. Aqueous polyurethane adhesive dispersions have established themselves in the past in various application fields. The use of water-borne coatings and adhesives is continually on the rise, and not only due to VOC (Volatile Organic Compound) and environmental concerns. The increasing price of crude oil and its effect on organic chemical costs remains a factor in their increased market penetration.

Environmentally friendly coatings and adhesive systems contain reduced amounts of organic compounds. While coating and adhesive dispersions applied without additional isocyanate provide good mechanical properties, crosslinking with special isocyanates can significantly improve physical properties such as tensile strength and adhesion, at the same time increasing tensile modulus and heat distortion temperature.

In water-borne adhesive dispersions, Rhein Chemie has demonstrated the advantages of using solid, dimeric TDI to formulate storage-stable, one-component systems with improved physical properties.

About Rhein Chemie

Rhein Chemie is a chemicals company which has had a successful track record in customized additives and service products stretching back over 100 years. The approximately 850-strong workforce produces and sells products for various sectors of the rubber, lubricant, plastics, and polyurethane industries worldwide. The company is headquartered in Mannheim-Rheinau, Germany and has subsidiaries and production facilities in Europe, Asia and North and South America. Rhein Chemie is a wholly owned subsidiary of LANXESS Deutschland GmbH, Leverkusen, Germany.

Forward-looking Statements

This news release contains forward-looking statements based on current assumptions and forecasts made by the management of Rhein Chemie Rheinau GmbH. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of our sole stockholder LANXESS Deutschland GmbH and the estimates given here. These factors include those discussed in LANXESS AG's reports to the Frankfurt Stock Exchange. LANXESS AG and Rhein Chemie Rheinau GmbH assume no liability whatsoever to update these forward-looking statements or to conform them to future events or developments

Source: Rhein Chemie

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