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| | Patent 5576145: Esterified styrene/maleic anhydride polymer and polymer-containing photoimageable composition having ... |
 | | Subsequently, the styrene/maleic anhydride is esterified with what will be referred to herein as a "major alcohol" which is an alkyl, aryl, cycloalkyl, arylalkyl or alkylaryl monoalcohol having a molecular weight greater than 100. |
 | | It is found to be necessary that the binder polymer be esterified to as high a degree as possible, i.e., preferably to at least about 80 mole percent of the incorporated maleic anhydride units. |
 | | Although 100% of the maleic anhydride moieties may be acceptably esterified, typically, a small percentage, e.g., 20 or less, mole percent of the maleic anhydride moieties, remain non-esterified. |
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