| COMMENTS |
Some ASA`s are made by heating an alpha olefin with MA. For other ASA`s, the alpha olefin is first isomerized to mixt of linear internal olefins, which is then combined with MA to make mixt of ASA`s having a lower pour point than an ASA made directly from an alpha olefin. For any ASA, a number of additional chemistries are possible. Reaction woth alcohols is a common next step, giving either diesters or half-esters/half-acids. Because they have hoghly branched structures, the diesters make good pour point depressants. Amines will also react with ASA``s giving an amide/acid prodt. Water will open the anhydride to a diacid, which can be used in polyesters or neutralized with base to give a disalt.
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