| 摘要 |
<p>A crosslinking agent is provided, prepared by reacting (A) an aminoplast resin; (B) a reactive urethane group-containing adduct of a polyfunctional polymer and monoisocyanate, and (C) at least one other compound having active hydrogen groups reactive with aminoplast resin (A). Compound (C) is selected from:(i) compounds having the structure (I):wherein X is aromatic; R<1>, R<2>, and R<3 >each independently represents H, (cyclo)alkyl having from 1 to 12 carbon atoms, aryl, alkaryl, aralkyl, or an active hydrogen-containing group,(ii) compounds having the structure (II) or (III):where R' and R'' each independently represents an aromatic group or an alkyl group having 1 to 12 carbon atoms; and(iii) compounds different from (i) and (ii), having a melting point of at least 80° C.Further provided are methods for preparing the crosslinking agent, curable compositions containing the crosslinking agent, and coated substrates.</p> |
