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US 4,381,376 AGranted
Preparation of low molecular weight copolymer salts
AssigneeAllied Corporation
InventorsPaul J. Albee, Jr., Patricia E. Burdick, Joseph I. Wrozina
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AssigneeAllied Corporation
InventorsPaul J. Albee, Jr., Patricia E. Burdick, Joseph I. Wrozina
Estimating the term…
A method for forming ionic copolymer salts from low molecular weight copolymer acids formed from ethylene and an alpha,beta-ethylenically unsaturated carboxylic acid having at least one carboxylic acid group, and cations having a valence of 1 to 3. The copolymer acid and the cation containing material are fed to a reaction vessel. The reaction vessel is maintained below atmospheric pressure, for at least a portion of the time, so that the oxygen content of the reaction vessel is minimized and volatile reaction products are removed. The reacting mixture is continually stirred or mixed within the reaction vessel. The temperature within the reaction vessel is controlled and maintained above the melting point of the polymer.
A method of making ionic copolymer salts from copolymer acids formed from ethylene and an alpha,beta-ethylenically unsaturated carboxylic acid having at least one carboxylic acid group, the copolymer acid having a number average molecular weight of from 500 to 5000, and at least 50 mol percent ethylene, the copolymer acid being neutralized by cations selected from a group having a valence of 1 to 3, comprising the steps of:
A method of making ionic copolymer salts from copolymer acids formed from ethylene and an alpha,beta-ethylenically unsaturated carboxylic acid having at least one carboxylic acid group, the copolymer acid having a number average molecular weight of from 500 to 5000, and at least 50 mol percent ethylene, the copolymer acid being neutralized by cations selected from a group having a valence of 1 to 3, comprising the steps of:
Dependencies are inferred from the claim text.