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| Number | Title | Issue Date |
| 7408070 | Method for purifying bisimides A method for purifying bisimides is provided. In one aspect, purified oxybisphthalimides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a bisimide compound, a solvent, and a phase transfer cat... | 08/05/2008 |
| 7268237 | Direct dianhydride synthesis This invention is related to a method for making diether dianhydrides by the reaction of halophthalic anhydride and a metal salt of an aromatic dihydroxy compound in the presence of a solvent and a phase transfer catalyst. Typical phase transfer catalyst include gua... | 09/11/2007 |
| 7265182 | Polyamic acid cross-linked polymer and formable composition therefrom Cross-linked polymers comprising an anhydride or partially hydrolyzed anhydride functionalized polymer having oligomeric polyamic acid cross-links are provided. In solution, a polymer of the invention forms a formable gel. The formable gel is useful for forming shap... | 09/04/2007 |
| 7265181 | Polyimide cross-linked polymer and shaped article thereof Provided according to the invention are cross-linked polymers comprising an anhydride or partially hydrolyzed anhydride functionalized polymer having oligomeric polyimide cross-links, providing a polymeric composite on a molecular scale, and shaped articles made the... | 09/04/2007 |
| 7208566 | Imide-linked maleimide and polymaleimide compounds The invention is based on the discovery that a remarkable improvement in the performance of maleimide thermosets can be achieved through the incorporation of imide-extended mono-, bis-, or polymaleimide compounds. These imide-extended maleimide compounds are readily... | 04/24/2007 |
| 7173140 | Process to form compound with indolocarbazole moieties A process composed of: reacting a reaction mixture comprised of one or more optionally substituted indolocarbazoles, a reaction medium, and a coupling agent at a reaction temperature to form a compound composed of a plurality of optionally substituted indolocarbazol... | 02/06/2007 |
| 7157587 | Imide-extended liquid bismaleimide resin The invention is based on the discovery that a remarkable improvement in the performance of bismaleimide thermosets can be achieved through the incorporation of an imide-extended liquid bismaleimide monomer. This imide-extended liquid bismaleimide monomer is readily... | 01/02/2007 |
| 6919404 | Hybrid polymer materials for liquid crystal alignment layers The present invention provides novel hybrid polymer optical alignment layers for inducing alignment of a liquid crystal medium. Hybrid polymers of this invention are prepared from at least one component selected from the group consisting of monomer, macromonomer and... | 07/19/2005 |
| 6881815 | Method for the preparation poly(etherimide)s A method for the synthesis of poly(etherimide)s comprises the reaction of 4-halotetrahydrophthalic anhydride with an activating primary amine to yield an activated 4-halotetrahydrophthalimide. Activated 4-halotetrahydrophthalimide may then be aromatized and treated ... | 04/19/2005 |
| 6835212 | Agent and method for dyeing keratin fibers The agent for dyeing keratin fibers contains one or more aryl and/or benzyl alcohols, one or more oxidizing enzymes, especially vanillyl oxidase, derivatives of vanillyl oxidase or galactose oxidase, and a nucleophilic compound that forms a dye for dyeing keratin fi... | 12/28/2004 |
| 6433184 | Polyamide-imide having head-to-tail backbone The present invention relates to polyamide-imides having head-to-tail backbone and more particularly, to polyamide-imimdes having head-to-tail ragularity to provide excellent heat and chemical resistance, physical and mechanical properties, processability... | 08/13/2002 |
| 6218536 | 1,2-bis-adducts of stable nitroxides with substituted ethylenes and stabilized compositions 1,2-Bis-adducts of stable hindered nitroxide compounds with substituted ethylenes are prepared by reacting two equivalents of nitroxyl compound with an ethylenically unsaturated compound such as styrene or an acrylate ester. These adducts are very effecti... | 04/17/2001 |
| 6177570 | Method for producing aromatic bisimides Bisimides of the formula I ##STR1## where R1, R2, R3 and R4 have the meanings stated in the description, are prepared in a process in which the corresponding dicarboxylic anhydrides of the formulae II and III R | 01/23/2001 |
| 6114156 | Molecular level coating for metal oxide particles Polymer encapsulated metal oxide particles are prepared by combining a polyamide acid in a polar aprotic solvent with a metal alkoxide solution. The polymer was imidized and the metal oxide formed simultaneously in a refluxing organic solvent. The resulti... | 09/05/2000 |
| 6060575 | 1,4-bis(3,4-dicarboxyphenoxy)-2-tert-butylbenzene dianhydride and method of using the same The present invention provides a series of easily processable poly(ether-imide)s that are organic-soluble and can afford colorless films, their organic solutions and their manufacturing process. The poly(ether-imide) is prepared from a dianhydride and a d... | 05/09/2000 |
| 6028203 | Phase transfer catalyzed method for prepared oxybisphthalic compounds Oxybisphthalic compounds such as 4,4'-oxybis(N-methylphthalimide) and 4,4'-oxybis(phthalic anhydride) are prepared from the corresponding nitro- or halo-substituted phthalic compounds by reaction with an alkanoate or carbonate salt in a non-polar solvent ... | 02/22/2000 |
| 6008374 | Process for preparing bis (ether anhydrides) using alkylamine derived bisimides having low melting temperatures A process for making bis(ether anhydrides) employs alkylamines having low melting temperatures thus allowing for novel intermediate process steps for preparing bis(ether anhydrides). The alkylamines have alkyl groups which contain at least three carbon at... | 12/28/1999 |
| 5977289 | Colorless organic-soluble aromatic poly(ether-imide)s, the organic solutions and preparation thereof The present invention provides a series of easily processable poly(ether-imide)s that are organic-soluble and can afford colorless films, their organic solutions and their manufacturing process. The poly(ether-imide) is prepared from a dianhydride and a d... | 11/02/1999 |
| 5977379 | Process for the preparation of flame-resistant halogenated imide compounds The invention relates to the preparation of halogenated imides derived from hydrazine, a halogen and a dicarboxylic acid anhydride and capable of being employed as fireproofing agents for plastics. A dicarboxylic acid anhydride is halogenated with bromine, chl... | 11/02/1999 |
| 5760165 | Bisallyloxyimides Monoallyloxyimides, diallyloxyimides and polyallyloxyimides of general Formula I. ##STR1## wherein: X is an integer from 1 to 4 inclusive; R1, R2, and R3 are independently selected from the group comprising hydrogen, ... | 06/02/1998 |
| 5756740 | Process for the preparation of binary sensitizing dyes A process for the preparation of photographic binary sensitizing dyes, which comprise two separate, nonconjugated chromophores, one of which has the capability of adsorbing to a silver halide grain surface, the other of which is substantially non-adsorbin... | 05/26/1998 |
| 5744615 | Ultra white N,N'-ethylene-bis(tetrabromophthalimide) and its production in aqueous acetic acid Disclosed is a process for producing an ultra-white N,N'-ethylene-bis(tetrabromophthalimide) product useful as a flame retardant. Also disclosed is a flame retardant composition predominantly comprised of N,N'-ethylene-bis(tetrabromophthalimide) and havin... | 04/28/1998 |
| 5719295 | Process for preparing bis(ether anhydrides) using alkylamine derived bisimides having low melting temperatures A process for making bis(ether anhydrides) employs alkylamines having low melting temperatures thus allowing for novel intermediate process steps for preparing bis(ether anhydrides). The alkylamines have alkyl groups which contain at least three carbon at... | 02/17/1998 |
| 5709947 | Epoxy resins based on diaminobisimide compounds A method for the preparation of a diaminobisimide compound of the formula (I) substantially free of oligomers: ##STR1## wherein Ar1 is an optionally substituted aromatic residue which provides for good conjugation between the nitrogen cont... | 01/20/1998 |
| 5693797 | Process for preparing brominated phthalimides A process for the preparation of brominated phthalimides that involves mixing tetrabromophthalic anhydride, an organic acid, and an organic dispersing agent in water at approximately 110° C. under 1 bar pressure is disclosed. An amine is added and the re... | 12/02/1997 |
| 5672662 | Poly(ethylene glycol) and related polymers monosubstituted with propionic or butanoic acids and functional derivatives thereof for biotechnical applications Active esters of PEG acids and related polymers are provided that have a single propionic or butanoic acid moiety and no other ester linkages. These polymer acids have a half life in water of from about 10 to 25 minutes. For example, alpha-methoxy, omega-... | 09/30/1997 |
| 5610317 | Multiple chemically functional end cap monomers Thermomechanical and thermo-oxidative stabilities in resin composites across the range of aerospace "engineering thermoplastic" resins are improved by forming four crosslinks at each addition polymerization site in the backbone of the resin using crosslin... | 03/11/1997 |
| 5483008 | Polyether having heterofunctional groups at both ends, process for the preparation thereof and polymerization initiator therefor The present invention relates to a bifunctional polyether having groups different from each other at both ends, with a polymerization degree of 5 to 10000 and consisting of repeating units each represented by the following formula (I): ##STR1## ... | 01/09/1996 |
| 5464861 | 2-thioindoles (selenoindoles) and related disulfides (selenides) which inhibit protein tyrosine kinases and which have antitumor properties 2-Thioindoles (2-selenoindoles) and analogous 2-indolinethione (2-indolineselenone) and polysulfide (selenide) compounds, salts thereof, methods of production, intermediates in their production, pharmaceutical compositions containing said compounds, and m... | 11/07/1995 |
| 5420234 | Aminoimides Bis-N-aminoimides of formula (III): ##STR1## wherein m is 0 or 1 and ##STR2## is a mono- or polycyclic aromatic radical, can be employed to produce a variety of polymers of the type produced from diamines, including polyimides having an N--... | 05/30/1995 |
| 5374740 | Recrystallizable polyimides Polyimides can be obtained by reacting a dianhydride component comprising 3,4,3',4'-bisphenyltetracarboxylic dianhydride, oxydiphthalic dianhydride and in addition further aromatic dianhydrides, and a diamine component comprising diamines of the formula ... | 12/20/1994 |
| 5367083 | Extended acid halide capping monomers The solvent-resistance and thermal stability of polyamideimides of the general formulae: ##STR1## is improved by capping the amideimides with a crosslinking functionality (Y) containing a residue selected from the group of: ##STR2## wherein... | 11/22/1994 |
| 5359092 | Bis-N-aminoimides Bis-N-aminoimides of formula (III): ##STR1## wherein m is 0 or 1 and is a mono- or polycyclic aromatic radical, can be employed to produce a variety of polymers of the type produced from diamines, including polyimides having an N--N linkage; polyme... | 10/25/1994 |
| 5359084 | Method of preparing aromatic ether bisimides A method for preparing an aromatic ether bisimide is provided. The mixture obtained from reacting a substituted phthalimide with a metal salt of a hydroxy aromatic compound in a non-polar solvent is extracted with about 4% to about 6% by weight aqueous al... | 10/25/1994 |
| 5310933 | Method for preparing polyimides for use in electronic applications Polyimides useful in electronic applications are prepared by the reaction of at least one aromatic tetracarboxylic acid or functional derivative thereof with at least one diamine in benzonitrile solution. The preferred tetracarboxylic acid derivative and ... | 05/10/1994 |
| 5304655 | N'-substituted N-amino-3,4,5,6-tetrafluorophthalimides, and processes for their preparation Compounds of the formula ##STR1## in which X is the radical ##STR2## where R1 and R2 are in each case a hydrogen atom, an alkyl-(C1 -C10) group, aryl group, alkyl(C1 -C6)-CO ... | 04/19/1994 |
| 5274115 | N'-substituted N-amino-3,4,5,6-tetrafluorophthalimides Compounds of the formula ##STR1## in which X is the radical ##STR2## where R1 and R2 are in each case a hydrogen atom, an alkyl-(C1 -C10) group, aryl group, alkyl(C1 -C6)-CO ... | 12/28/1993 |
| 5252730 | Polymer composition having intense magnetic properties and method for preparation thereof A 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 a metal catalyst at elevated temperatures to form a phenylenebis diphthal... | 10/12/1993 |
| 5252536 | Substituted indolinones useful as herbicidal agents Substituted indolinone compounds which are effective in the control of undesirable plant species are described. Also described are a method for the herbicidal use of the compounds and a method for their preparation.... | 10/12/1993 |
| 5229484 | N-substituted polyamide-imide An N-substituted polyamide-imide essentially composed of identical or different repeating units of the formula I ##STR1## where R1 is one of the following tetravalent aromatic radicals ##STR2## and X is a bond or one of the following ... | 07/20/1993 |
