Invention Grant
US08802771B2 Two component polyurethane coating compositions comprising isocyanurate compositions from bis(isocyanatomethyl) cyclohexane and from aliphatic diisocyanates 有权
包含来自双(异氰酸甲酯基)环己烷和脂族二异氰酸酯的异氰脲酸酯组合物的双组分聚氨酯涂料组合物

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