| 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 activ e hydrogen groups reactive with aminoplast resin (A). Compound (C) is selected from: (i) compounds having the structure (I): wherein X is aromatic; R1, R2, and R3 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 t he crosslinking agent, curable compositions containing the crosslinking agent, and coated substrates.</p> |
