| 摘要 |
<p>A charge imbalanced composition comprising: (a) about 10 to 90 mole % of a mixture of amphoteric copolymers having formulas (I) and (II) where A is present in an amount of about 0.1-0.8 mole, and B is present in an amount of about 0.05-0.4 mole, and where A is 2-6 times B, where R=C1-C4, n=1-6, R1 and R2 are independently C1-C6, R3 is H or lower alkyl, and R4=C12-C24; (b) about 10 to 90 mole % of a polymeric diacid having formula (III) where R is as defined above, and (c) about 0-20 mole % of by-product salts which are the dialkylaminoalkylamine and alkylamine salts of (a) and (b). The composition described above is made by: reacting 1 mole of an anhydride compound having formula (IV) where R is as defined above, with less than 1 mole of a mixture of about 0.1-0.8 mole of a compound having formula (A) where n, R1, R2 and R3 are as defined above, and about 0.05-0.4 of a compound having formula (B) where R4 is as defined above, and where A is 2-6 times B, isolating the product, and hydrolyzing any residual anhydride compound in water to the corresponding diacid compound.</p> |
