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AssigneeBayer Aktiengesellschaft
InventorsCharles A. Gambino, Karen M. Henderson, Patricia B. Jacobs, Sze-Ming Lee, Robert A. Sylvester
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The present invention relates to polyurethanes containing secondary amide groups in the backbones of the polyurethanes, wherein the secondary amide groups (calculated as NH—CO—, MW 43) are present in an amount of 1 to 14% by weight, based on the weight of the polyurethanes, and correspond to the formula —X1—R1—NH—C(O)—R2—X2— (I) wherein X1 and X2 are the same or different and represent the groups obtained by removing a hydrogen atom from a hydroxy group or a primary or secondary amino group and R1 and R2 are the same or different and represent linear or branched hydrocarbon groups that are optionally substituted by groups that do not contain isocyanate-reactive hydrogen atoms. The present invention also relates to one-component, thermoset compositions containing the polyurethanes with secondary amide groups in the backbone and a cross-linking component that is reactive with amide groups. Finally, the present invention relates to coatings, sealants and adhesives prepared from these one-component, thermoset compositions.
A polyurethane containing secondary amide groups in the backbone of the polyurethane, wherein the polyurethane contains an average of 2 to 6 secondary amide groups and wherein the secondary amide groups (calculated as NH—CO—, MW 43) are present in an amount of 1 to 14% by weight, based on the weight of the polyurethane, and correspond to the formula
A polyurethane containing secondary amide groups in the backbone of the polyurethane, wherein the polyurethane contains an average of 2 to 6 secondary amide groups and wherein the secondary amide groups (calculated as NH—CO—, MW 43) are present in an amount of 1 to 10% by weight, based on the weight of the polyurethane, and correspond to the formula
Dependencies are inferred from the claim text.