Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-05-04
1990-09-04
Lipman, Bernard
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253287, 5253288, 525386, C08F 814
Patent
active
049545663
ABSTRACT:
A one-pot process for preparing a polymer carrying pendant organic residues attached thereto via linking bridges comprises forming an organic solvent solution or suspension of an organic acid, distilling off a water-organic solvent azeotropic solution therefrom to form an organic solvent solution or suspension of the corresponding anhydride of the organic acid, admixing into the organic solvent solution or suspension of the corresponding anhydride a polymer comprising pendant moieties capable of reacting with the --COOH residues of the organic acid derivatized polymer having at least one pendant residue of the organic acid attached thereto via a bridge resulting from the reaction of the --COOH residue of the acid and the pendant reactive residues of the polymer, and free organic acid under conditions permitting the formation of an organic ester or amine-bridged polymer and separating the derivatized polymer from the organic solvent solution of the free organic acid.
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Lipman Bernard
Westvaco Corporation
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