C1(=O)OC(=O)C=C1.[C:8]([OH:13])(=[O:12])[C:9]([CH3:11])=[CH2:10].C(OOC(C)(C)C)(C)(C)C.[C:24]([O:37]CC)(=[O:36])[C:25]1[C:26](=CC=CC=1)[C:27]([O:29]CC)=[O:28]>O>[C:8]([O-:13])(=[O:12])[C:9]([CH3:11])=[CH2:10].[C:24]([O-:37])(=[O:36])/[CH:25]=[CH:26]\[C:27]([O-:29])=[O:28]The preparation of Example 4 is repeated with the exception that 39 g (0.40) mole maleic anhydride is copolymerized with 52 g (0.60 mole) methacrylic acid in the presence of 14 g di-t-butyl peroxide initiator and 945 g diethyl phthalate in a 2000 ml flask, the methacrylic acid is added over a 20-minute period at a polymerization temperature of 150° C., the reaction solution is held at the polymerization temperature for 10 minutes following the methacrylic acid addition, and the copolymer is hydrolyzed by the addition of 420 g water added at a temperature of 120° C. A substantially homogeneous hydrolyzed methacrylate/maleate copolymer is obtained.
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