Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1992-06-11
1993-08-17
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526213, 526216, 526318, 5253295, 525366, 524773, 524854, 524924, C08F 206, C08F21814
Patent
active
052370240
ABSTRACT:
A process which comprises reacting maleic anhydride and a primary or secondary C.sub.1 -C.sub.18 alcohol to form a maleic half ester, and then polymerizing the half ester and monoalkenyl aromatic monomer in ester solvent in the presence of a catalyst to form a solution of monoalkenyl aromatic monomer-maleic half ester copolymer having a weight average molecular weight of at least 110,000 Daltons. After formation of the copolymer, the reaction solution is neutralized to form a mixture of an alkaline salt solution of the copolymer and solvent and then the solvent is removed from the mixture.
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Allberry David E.
Lee Kang I.
Monsanto Company
Murphy Michael J.
Teskin Fred
Wachter Mark F.
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