| 摘要 |
<p>A sizing agent for the paper industry comprising a cationic oligourethane latex; said urethane having the formula: <IMAGE> in which R2 is an alkylene radical containing a C2-C6 radical or a polyoxyalkylenic radical of a degree of polycondensation of 1 to 4, R3 is an alkyl radical containing at least 7 carbon atoms, and R4 and X represent the remainder of the quaternizing agent R4X with (a) R1 representing <IMAGE> R5 being an aliphatic radical containing C4 as a maximum and n varying from 1 to 3; or (b) R1 representing <IMAGE> R5 being <IMAGE> in which R2, R3, R4 and X having the preceding definitions and n varying from 2 to 6; and the method of making the oligourethane latex.</p> |
