Novel polyimides, and polyamic acid and ester intermediates thereof
Patent 4405770 Issued on September 20, 1983. Estimated Expiration Date: 
August 12, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 12, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3505288 3609123 3793291 Novel nitrogen-containing aromatic polymers and process for their preparation Aromatic diamines and their use as polycondensation components for the manufacture of polyamide, polyamide-imide and polyimide polymers Novel vinyl end-capped polyimide oligomers Acetylene terminated imide oligomers which melt at low temperatures Methods of preparing polyimides and polyimide precursors Patent #: 4296208 InventorsAssigneeApplicationNo. 06/292257 filed on 08/12/1981US Classes:526/259, Nitrogen atom is part of a bridged or fused ring system428/473.5, Of polyimide526/262, Imide monomer526/270, 5-membered heterocyclic ring compound contains at least one oxygen atom526/271, Acid anhydride526/285, From monomer containing an acetylenic group526/304, Contains oxygen atom other than in amide form bonded to a carbon atom526/305, Cycloaliphatic or aromatic526/306, Plural amide group containing528/125, From ketone-containing phenolic reactant or with ketone-containing reactant528/126, Polymerizing in the presence of a specified material other than reactant528/128, With nonphenolic or nonketone reactant528/172, Nitrogen-containing compound is a reactant other than wherein nitrogen is solely present as a carboxylic acid derivative528/179, Polymerizing in the presence of a specified material other than a reactant and other than Group IA or Group IIA material as sole metal atom528/182, Material is a nitrogen-containing compound528/185, Phenolic reactant contains at least two aryl rings and two diverse phenolic to oxygen bonds528/188, Reactant contains three or more carboxylic acid groups or is derivative thereof528/220, FROM KETONE OR KETENE REACTANT528/222, Polymerizing in the presence of a specified material other than a reactant528/224, Material contains a nitrogen-containing compound528/229, Nitrogen-containing reactant contains an amine group528/352, Phosphorus- or sulfur-containing reactant528/353, Carboxylic acid contains at least four carboxylic acid groups or is a derivative of a carboxylic acid containing at least four carboxylic groups564/305Benzene ring containingExaminersPrimary: Lee, Lester L.Attorney, Agent or FirmInternational ClassesC08G 73/10 (20060101)C08G 73/00 (20060101) AbstractNovel polyimides, optionally end-capped with polymerizable or inert groups, and the polyamic acid or ester intermediates thereof are prepared by reacting a tetracarboxylic acid compound (e.g. pyromellitic dianhydride or 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride or its methyl diester) with diamines having the general formula ##STR1## wherein Z is oxygen or sulfur, X and/or Y are carbonyl or carbinol groups, the amine groups may be in the 2-, 3-, and/or 4-position, and isomerism is present when X and/or Y is a carbinol group. The polyimides may be end-capped by reaction, during or after their formation, with polymerizable groups such as 3-aminophenyl acetylene or 3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride. The diamines are novel classes of amines when Z is sulfur and when Z is oxygen and X, Y, or X and Y are carbinol groups.Field of SearchFROM KETONE OR KETENE REACTANTFrom ketone-containing phenolic reactant or with ketone-containing reactant Polymerizing in the presence of a specified material other than reactant With nonphenolic or nonketone reactant Carboxylic acid contains at least four carboxylic acid groups or is a derivative of a carboxylic acid containing at least four carboxylic groups Phenolic reactant contains at least two aryl rings and two diverse phenolic to oxygen bonds Reactant contains three or more carboxylic acid groups or is derivative thereof Polymerizing in the presence of a specified material other than a reactant and other than Group IA or Group IIA material as sole metal atom Material is a nitrogen-containing compound Phosphorus- or sulfur-containing reactant Polymerizing in the presence of a specified material other than a reactant Material contains a nitrogen-containing compound Nitrogen-containing reactant contains an amine group |
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