| 摘要 |
A method for preparing hydrophobically modified rheology modifiers; said method comprising polymerizing a monomer mixture having two or more components. The first component is H2C=C(R)C(O)X(CH2CH2O)n(CH(R')CH2O)m R" or H2C=C(R)C6H4C(CH3)2NHCO2(CH2CH2O)n(CH(R')CH2O)m R", wherein X is O or NH, R is H or CH3, R' is C1-C2 alkyl, R" is C8-C22 alkyl or C8-C16 alkylphenyl, n is an average number from 6-100 and m is an average number from 0-50, provided that n>=m and m+n is 6-100. The second component is a C3-C6 carboxylic acid monomer; wherein polymerization occurs in the presence of an oxidant, a reductant and a metal catalyst, and substantially in the absence of a peroxide, hydroperoxide or perester containing an alkyl group having at least five carbon atoms.
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