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| Number | Title | Issue Date |
| 7408018 | Elastomeric functional biodegradable copolyester amides and copolyester urethanes The invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers are based on α-amino acids and possess physical, chemical and biodegradation properties that render them suitable for use in the ... | 08/05/2008 |
| 7304122 | Elastomeric functional biodegradable copolyester amides and copolyester urethanes The present invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers that are based on α-amino acids and possess suitable physical, chemical and biodegradation properties. The polymers are u... | 12/04/2007 |
| 7078477 | Process for producing solvent-soluble polyimide In the process of the present invention, a solvent-soluble polyimide is produced by polycondensing at least one tetracarboxylic acid component with at least one diamine component in a solvent in the presence of a tertiary amine. The tetracarboxylic acid component is... | 07/18/2006 |
| 6984711 | Method for production of cyclic polysulfide compound and rubber composition containing the same A method of production of a cyclic polysulfide having the formula (I): wherein x is an integer of 2 to 6, n is an integer of 1 to 15, and R indicates a substituted or unsubstituted C2 to C18 alkyle... | 01/10/2006 |
| 6864348 | Polyetherpolyamide elastomer having low water absorption Polyetherpolyamide elastomer showing a low water absorption, a high stress relaxation, and a high elastic recovery percentage of elongation is obtainable by polymerizing an aminocarboxylic acid compound and/or a lactam compound, a triblock polyetherdiamine compound ... | 03/08/2005 |
| 6828408 | Aromatic polyimide ester and method for producing thereof An aromatic polyimide ester having a small coefficient of linear expansion, small water absorbing property, and excellent heat resistance. The aromatic polyimide ester comprising: a repeating unit represented by a following formula (I), | 12/07/2004 |
| 6762277 | Method of manufacturing N-carboxyamino acid anhydride and polyamino acid A method of manufacturing a new N-carboxyamino acid anhydride and polyamino acid using a simple process operation. The method for manufacturing N-carboxyamino acid anhydride comprising reacting α-amino acid with di-tert-butyltricarbonate. The method for manu... | 07/13/2004 |
| 6649730 | Aromatic polyester amide The object of the present invention is to provide an aromatic polyester amide which has improved mechanical strength and high elastic modulus after being molded into a thin wall article as well as exhibits excellent heat stability and moldability. The pre... | 11/18/2003 |
| 6610815 | Polyamic acid ester Disclosed is a polyamide ester which comprises a plurality of specific amide ester recurring units including, in a specific ratio, recurring units containing a tetravalent benzene group and recurring units containing a tetravalent diphenyl ether group, an... | 08/26/2003 |
| 6586555 | Processes of preparing condensed polymers with polycarboxylic acids and polyamines This invention provides processes of the preparation of polyamides, polyimides, and polyamideimides, which are easy to purify after reactions, from polycarboxylic acids and polyamines in high yield without side reactions such as a change of color to black... | 07/01/2003 |
| 6586561 | Rigid rod ion conducting copolymers Sulfonated polyimide polymers incorporating bulky monomers are disclosed. The polymers have a liquid crystalline structure and exhibit high conductivity, high water uptake and water stability over a range of relative humidities and temperatures. The polym... | 07/01/2003 |
| 6503538 | Elastomeric functional biodegradable copolyester amides and copolyester urethanes The present invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers that are based on -amino acids and possess suitable physical, chemical and biodegradation properties. Th... | 01/07/2003 |
| 6498226 | Cycloaliphatic polyimide, a method for producing the same, and its use This invention provides cycloaliphatic polyimide having the following formula (I): ##STR1## wherein 1 and n are integers from 4 to 7; m is an integer from 0 to 2; p is an integer from 1 to 8; polycyclic aliphatic compound R reprents C1-8 c... | 12/24/2002 |
| 6291122 | Polyesters A branched polyester resin of the Formula ##STR1## wherein n and m represent randomly repeating segments, and the number of n and m segments in the polymer backbone are each of from about 10 to about 10,000; X is an alkylene group, an olefinic group, or a... | 09/18/2001 |
| 6180747 | Polyesters A branched polyester resin of the Formula ##STR1## wherein n and m represent randomly repeating segments, and the number of n and m segments in the polymer backbone are each of from about 10 to about 10,000; X is an alkylene group, an olefinic group, or a... | 01/30/2001 |
| 6132884 | Process for producing amorphous anisotrophic melt-forming polymers having a high degree of stretchability and polymers produced by same Process for producing highly stretchable, amorphous anisotropic melt-forming polymers having recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, at least one aromatic diacid and an aromatic diol and/or hydroxyamine component, a... | 10/17/2000 |
| 6063465 | Polyester container and method for making same A polyester container made from a polymer having ethylene glycol moieties, isosorbide moieties and terepthaloyl moieties, and the method of making the container is described. The polyester container is suitable for holding liquids and solids, and may be h... | 05/16/2000 |
| 5948881 | Polyamide curing agents based on mixtures of polyethylene-amines, piperazines and deaminated bis-(p-aminocyclohexyl) methane Curative compositions of amine terminated polyamide resins blended with a deaminated bis-(p-aminocyclohexyl)methane composition (DeAms) are useful for curing adhesive epoxy resin compositions. The polyamides comprise combinations of fatty mono-acids, dime... | 09/07/1999 |
| 5783655 | Aromatic polyamide pulp by means of continuous transferable polymerization-orientation method and a process for preparation thereof A process for the preparation of aromatic polyamide pulp having both excellent physical properties and a high degree of polymerization by continuous polymerization and orientation by using of mixed solutions. The solutions are prepared by reacting diamine... | 07/21/1998 |
| 5780556 | Thermoset coating compositions having improved hardness and curing properties The present invention provides an amino curable polyester oligomer composition having low viscosity and a narrow molecular weight distribution comprising one or a mixture of oligomers (a) and (b): ##STR1## wherein R is the residue of at least one ali... | 07/14/1998 |
| 5714572 | Polyimide resin composition The present invention provides a polyimide resin composition comprising: (a) a polyamide resin comprising a repeating unit represented by the general formula (1): ##STR1## wherein X represents a tetravalent organic group represented by the formula (... | 02/03/1998 |
| 5569738 | Melt processable etherimideimide/etherimide copolymer This invention relates to melt processable copolymer of etherimideimide/etherimide herein-after identified as PEII/PEI copolymer of following structural formula(I). ##STR1## wherein, R and R' are independently selected from the groups of ##STR2#... | 10/29/1996 |
| 5494964 | Polyesters based on hydroxyl-containing prepolymers of olefinically unsaturated monomers and their use as binders for electrophotographic toners Polyester resins suitable as binders for electrophotographic toners and for acceptor layers for the thermal diffusion printing process based on hydroxyl-containing prepolymers of olefinically unsaturated monomers obtained by (1) polymerization of a mixtur... | 02/27/1996 |
| 5405695 | Poly(phenylene Sulfide) fibers and production process thereof Disclosed herein are poly(phenylene sulfide) fibers having a tensile strength of at least 3.5 g/d, a knot tenacity of at least 2 g/d, a loop tenacity of at least 3.5 g/d, the number of abrasion cycles until breaking in a flexing abrasion test of at least ... | 04/11/1995 |
| 5380590 | Water-dispersible aromatic polyester, aqueous dispersion thereof and polyester film coated therewith which permits fast adhesion A water-dispersible aromatic polyester comprising a dicarboxylic acid component and a glycol component, wherein (A) at least 95 mol% of the dicarboxylic acid component is composed of an aromatic dicarboxylic acid component containing 30 to 99.5 mol% of a ... | 01/10/1995 |
| 5304626 | Polyimide copolymers containing 3,3',4,4'-tetracarboxybiphenyl dianhydride (BPDA) moieties A chemical resistant copolymer useful in electronic applications, said copolymer is a polyimide containing a 3,3',4,4'-tetracarboxybiphenyl dianhydride (BPDA) moiety, at least one other dianhydride moiety, and at least one diamine.... | 04/19/1994 |
| 5290909 | Polyimide composition for polyimide/copper foil laminate A polyimide composition for use in making polyimide/copper foil laminate that does not require an adhesive layer between the polyimide substrate and the copper foil. A polyimide precursor is first prepared from a monomer composition, which comprises a dia... | 03/01/1994 |
| 5250652 | High loading water-dispersible UVA and/or UVB light-absorbing copolymer The invention is concerned with novel water-dispersible copolymers which contain at least one UVA light-absorbing monomer, one UVB light-absorbing monomer, one hydrophilic monomer, and optionally one hydrophobic monomer component. The UVA light-absorbing ... | 10/05/1993 |
| 5248760 | Chemically cured low temperature polyimides The invention comprises curing polyamic acid solutions into polyimide solutions by adding a hydrophilic reagent to a polyamic acid solution. The hydrophilic reagent is selected to have little or no reactivity with amines or carboxylic acids, and is of the... | 09/28/1993 |
| 5239049 | Selected poly(dianhydrides) compounds, selected poly(amic acid) compounds, and selected poly(imide) compounds Poly(dianhydride) compounds having formulae (I) and (II): ##STR1## where m is 0 to 50. ##STR2## wherein n is 0 to 20 and X is bond junction, oxygen atom, sulfur atom, SO2, C(CF3), CO, C(CH3)2, CF2... | 08/24/1993 |
| 5233018 | Perfluorinated polyimide, perfluorinated poly(amic acid), starting compounds therefor, and methods for preparing them A perfluorinated polyimide comprising a repeating unit represented by general formula (1): ##STR1## and a perfluorinated poly(amic acid) comprising a repeating unit represented by general formula (6): ##STR2## wherein R1 is a tet... | 08/03/1993 |
| 5218076 | Branch polybenzazole polymer and method of preparation The invention is a process for making novel branched polybenzazole polymers and the polymers formed thereby. Novel compounds are also disclosed that are useful as branching agents in making the branched polybenzazole polymers. The branched polymers synthe... | 06/08/1993 |
| 5212277 | Polyetherimideimides and a method for manufacturing them The present invention relates to new polyetherimideimides having imideimide group with the following structural formula(I) and inherent viscosity of 0.27~0.71 dl/g, which can be made by effecting reaction between an aromatic bis(ether anhydride) and an or... | 05/18/1993 |
| 5112942 | Polymide compositions Copolyimides and their precursors are disclosed comprising units represented by the formula ##STR1## where R1, R2, R3 and R4 are the same or different and are hydrogen or C1 to C6 line... | 05/12/1992 |
| 5109107 | Polyamide-imide polymers having fluorine-containing linking groups The present invention provides for a novel heat stable class of polyamide-imide polymers having excellent flow properties and hydrolytic stability which are prepared by forming the polycondensation product of one or more aromatic or aliphatic diamines, on... | 04/28/1992 |
| 5096998 | Reactive-oligoimide adhesives, laminates, and methods of making the laminates A reactive oligoimide, which may serve as an adhesive for bonding at least one layer or film to another layer, preferably a flexible metallic layer to a flexible layer of a polyimide, in order to form a flexible multilayer metal-clad laminate.... | 03/17/1992 |
| 5077382 | Copolyimide ODPA/BPDA/4,4'-ODA or P-PDA A co-polyimide based upon a mixture of 4,4'-oxydiphthalic dianhydride (ODPA) and 3,4,3',4'-biphenyltetracarboxylic dianhydride (BPDA) as the dianhydride component and either 4,4'-oxydianiline (ODA) or paraphenylene diamine as the amine component is disclo... | 12/31/1991 |
| 5068307 | Polyamideimides containing 3,4'-diamino-diphenylether as diamine component and process for preparing the same A polyamideimide having an inherent viscosity of above 0.48 which comprises a unit of the following formula (II) ##STR1## and a unit of the following formula (IV) ##STR2## as main units forming the molecular chains of the polyamideimide, and an ... | 11/26/1991 |
| 5032667 | Amide and/or imide containing polymers and monomers for the preparation thereof Described herein are amide and/or imide containing polymers based on novel monomers that contain isoalkylidene bridges. These polymers have excellent toughness combined with high temperature stability, low water absorption, and good melt-fabricability.... | 07/16/1991 |
| 4994544 | Production process for polyimide fibers A process for the production of polyimide fibers and polyimide fibers obtained by the process. The process includes thermal or chemical imidation of a polyamic acid which has been obtained by reacting a specific diamine and a particular tetracarboxylic di... | 02/19/1991 |
