Dow Global Technolgoies LLC

Rohm and Haas Company

Aaron Yang

John N Argyropoulos

Debkumar Bhattacharjee

Donald Craig Schall

Allen Xu

Louie Luo

John N Argypropoulas

The present invention provides two-component polyurethane compositions comprising, as one component, polyisocyanate compositions of the isocyanurate of one or more bis(isocyanatomethyl)cyclohexane or, preferably, a mixture of two or more of these, and of the isocyanurate of hexamethylene diisocyanate (HDI trimer), and, as the other component, a mix of a soft polyol having a hydroxyl functionality of from 2.5 to 5.0 and a molecular weight of from 500 to 3,000, and a hard polyol. Such compositions provide coatings, especially clear topcoats, which exhibit excellent scratch and mar and solvent resistance in addition to a good balance of hardness and flexibility without the need for increasing the volatile organic content (VOC) of the compositions. Also provided are compositions of a polyisocyanate compositions of the isocyanurate of one or more bis(isocyanatomethyl)cyclohexane with soft polyol which have lower VOCs.

Two component polyurethane coating compositions comprising isocyanurate compositions from bis(isocyanatomethyl) cyclohexane and from aliphatic diisocyanates

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Shanghai, China

Aaron Yang