Stepwise linear magnetic polymers and methods for preparation thereof
AssigneeNorthrop Corporation
InventorJack D. Mackey
Life of this patent
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Abstract
A stepwise linear polymer composition having intense magnetic properties and a method for preparation of same. A phthalimide compound and an aromatic dialiphatic acid are reacted in the presence of an acetate of monovalent metal at elevated temperatures to form a phenylenebis diphthalimidine compound. The phenylenebis diphthalimidine compound is then reacted with 3-benzylidine phthalimidine and a metal salt of an aliphatic acid at elevated temperatures under an inert gas to form the intensely magnetic polymer. The reactions may be carried out in the presence of a solvent.
Claims14
A process for producing a stepwise linear polymer composition having intense magnetic properties, comprising the steps of:
- reacting a phthalimide compound with 1,3-phenylene diacetic acid, in a proportion of about two molar amounts of the phthalimide compound to about one molar amount of the 1,3-phenylene diacetic acid, in the presence of an acetate of a monovalent metal at a temperature of between about 200.degree. to about 260.degree. C. for between about forty-five minutes to about 3 hours, whereby a 1,3-phenylenebis diphthalimidine compound is formed;
- cooling, solidifying, and extracting the 1,3-phenylene-bis diphthalimidine compound;
- pulverizing, filtering, and washing the extracted 1,3-phenylenebis diphthalimidine compound;
- and,
- reacting the extracted 1,3-phenylenebis diphthalimidine compound, a metal acetate salt selected from the group consisting of metal acetate salts of a divalent metal and metal acetate salts of a trivalent metal, and 3-benzylidine phthalimidine at a temperature of between about 260.degree. and about 380.degree. C. under an inert gas atmosphere, whereby the polymer composition having intense magnetic properties is formed.
A process for producing a stepwise linear polymer composition having intense magnetic properties, comprising the steps of:
- reacting a phthalimide compound with 1,3-phenylene diacetic acid, in a proportion of about two molar amounts of the phthalimide compound to about one molar amount of the 1,3-phenylene diacetic acid, in the presence of an acetate of a monovalent metal at a temperature of between about 200.degree. to about 260.degree. C. for between about forty-five minutes to about 3 hours, whereby a 1,3-phenylenebis diphthalimidine compound is formed;
- cooling, solidifying, and extracting the 1,3-phenylene-bis diphthalimidine compound;
- pulverizing, filtering, and washing the extracted 1,3-phenylenebis diphthalimidine compound;
- and,
- reacting the extracted 1,3-phenylenebis diphthalimidine compound with a metal acetate salt selected from the group consisting of metal acetate salts of a monovalent metal and with a salt of a polyvalent metal and with 3-benzylidine phthalimidine at a temperature of between about 260.degree. and about 380.degree. C. under an inert gas atmosphere, whereby the polymer composition having intense magnetic properties is formed.
A stepwise linear polymer composition having the recurring structure ##STR17## wherein M is a metal selected from the group consisting of divalent metals and trivalent metals.
Dependencies are inferred from the claim text.