| 摘要 |
A process is disclosed that comprises solution grafting a hydrocarbon polymer prepared from at least C<SUB>2 </SUB>to C<SUB>28 </SUB>polymerizable hydrocarbon, said polymer having a number average molecular weight in the range of from about 5,000 to about 500,000, with an ethylenically unsaturated C<SUB>3 </SUB>to C<SUB>10 </SUB>carboxylic acid material, using a free radical initiator, in the presence of an aromatic ester oil of the formula (I) wherein R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3</SUB>, R<SUB>4</SUB>, R<SUB>5</SUB>, and R<SUB>6 </SUB>are independently selected from the group consisting of hydrogen, -COOR<SUB>7</SUB>, -COOR<SUB>8</SUB>, -COOR<SUB>9</SUB>, -COOR<SUB>10</SUB>, -COOR<SUB>11</SUB>, and -COOR<SUB>12</SUB>, provided that no more than 5 of R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3</SUB>, R<SUB>4</SUB>, R<SUB>5 </SUB>and R<SUB>6 </SUB>are hydrogen, and R<SUB>7</SUB>, R<SUB>8</SUB>, R<SUB>9</SUB>, R<SUB>10</SUB>, R<SUB>11</SUB>, and R<SUB>12 </SUB>are independently selected from the group consisting of alkyl and alkylesters
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