|
Match
|
Document |
Document Title |
|
|
7585929 |
Preparation and uses for polyarylates
The present invention is directed to polyarylates comprising repeating units having the structure:
as well as their preparation and use as cell growth substrates.
|
|
|
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...
|
|
|
7361727 |
Copolymerization of 1,4-dioxan-2-one and a cyclic ester monomer producing thermal stabilized 1,4-dioxan-2-one (co)polymers
A polymerization process to derive a thermal-stabilized poly(1,4-dioxan-2-one) and cyclic ester monomer copolymer using a coordination-insertion catalyst/initiator. 1,4-dioxan-2-one and cyclic...
|
|
|
7271234 |
Polyarylates for drug delivery and tissue engineering
Biocompatible polyarylates of tyrosine-derived diphenol compounds and poly(alkylene oxide) dicarboxylic acids, articles formed therefrom and therapeutic uses are disclosed.
|
|
|
7041778 |
Processable thermally stable addition polyimide for composite applications
A novel polyimide resin consisting essentially of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), 3,4,3′,4′-biphenyltetracarboxylic dianhydride (BPDA), 2,2 bis...
|
|
|
7009026 |
Method for producing a liquid crystalline polyester and the liquid crystalline polyester
The object is to provide liquid crystalline polyester which gives molded articles without generating acetic acid gas, and a method for producing the liquid crystalline polyester. This object is...
|
|
|
6784275 |
Active energy ray-curable polyimide resin composition
Disclosed is an active energy ray-curable polyimide resin composition which comprises a polymerizable polyimide resin (I) having an isocyanurate ring, an alicyclic structure, an imide ring and a...
|
|
|
6750317 |
Material and additive for highly crosslinked chemically and thermally stable polyhydroxyamide polymers
Polyhydroxyamides are polymerized to form highly-crosslinked, temperature-stable polymers. The polyhydroxyamides include as their central, parent structure a benzenetricarboxylic acid to which side...
|
|
|
6518390 |
Precursor of a heat resistant resin, heat resistant resin, insulating film and semiconductor device
A precursor of a polybenzoxazole resin which comprises a crosslinking group in a molecule and has a specific structure, a polybenzoxazole resin obtained from the precursor by the condensation...
|
|
|
6475477 |
Radio-opaque polymer biomaterials
Iodinated and/or brominated derivatives of aromatic dihydroxy monomers are prepared and polymerized to form radio-opaque polymers. The monomers may also be copolymerized with other dihydroxy...
|
|
|
6346597 |
Method for making polyester carbonates
A process for preparing a polyester carbonate is provided. The process comprises the steps of: (I) reacting a diacid with a carbonic acid diester and a catalyst in the presence of a polycarbonate...
|
|
|
6265521 |
Method for preparing polyether polymers of predetermined molecular
Polyether polymers such as polyetherimides are prepared by a two-step reaction. The first step is the reaction between an alkali metal salt of a dihydroxy-substituted aromatic hydrocarbon, such as...
|
|
|
6235866 |
Slurry preparation of bis (halophthalimides) and of polyether polymers
Bis(halophthalimides) such as, 3-bis[N-(4-chlorophthalimido)]benzene are prepared in slurry in an organic liquid such as o-dichlorobenzene or anisole, by a reaction at a temperature of at least...
|
|
|
6153720 |
Data and cockpit voice recorder enclosure
A crash-survivable enclosure (10) for protecting a data memory unit (45) used in vehicles has a shell (15) with an inner surface (22). The shell (15) defines an interior cavity (26) which contains...
|
|
|
6120491 |
Biodegradable, anionic polymers derived from the amino acid L-tyrosine
A polymer with a hydrolytically labile backbone and having the structure: ##STR1## wherein R 9 is an alkyl, aryl or alkylaryl group with up to 18 carbon atoms having a pendent carboxylic acid...
|
|
|
5908915 |
Copolyetherimides and phase catalyzed method for their preparation
Copolyetherimides are prepared by the reaction of an alkali metal salt of a dihydroxyaromatic compound with a bis(substituted phthalimide) and a third compound which may be a substituted aromatic...
|
|
|
5907025 |
Method for conducting Lewis acid-catalyzed reactions
Esterification reactions conducted in the presence of Lewis acids, including the reactions between aromatic carboxylic acids and alcohols and between epoxides and carboxylic acids, may be conducted...
|
|
|
5902872 |
Resin for coating formation and method for producing the same
A resin for coating formation which comprises a polyarylate comprising 2,2-bis(3-methyl-4-hydroxyphenyl)propane units and a divalent carboxylic acid component comprising 10 to 90 mol % of...
|
|
|
5889072 |
Process for preparing superabsorbing crosslinked polyaspartate salt
A process for preparing superabsorbing crosslinked polyaspartate salt by reacting crosslinked polysuccinimide having a weight average molecular weight of at least 20,000 Daltons with neat base or...
|
|
|
5854372 |
Process for the preparation of high molecular weight polycondensates
To prepare nitrogen-containing polycondensates, a starting substance which still contains reactive end groups is dispersed in a high-boiling inert solvent, preferably in the presence of a...
|
|
|
5807972 |
Polycaprolactam with novel chain regulation
The invention is directed to a hydrolytically polymerized polycaprolactam with new chain regulation, whereby the polymerization of caprolactam (I) is carried out with 0.1-0.7 weight percent of an...
|
|
|
5807965 |
Interfacial copolyestercarbonate method using catalyst comprising hexaalkylguanidinium salt and tertiary amine
The level of anhydride linkages in copolyestercarbonates is decreased by preparing the copolyestercarbonate interfacially in a two-step method from at least one dihydroxyaromatic compound and at...
|
|
|
5750711 |
Dicarboxylic acid derivatives
The dicarboxylic acid derivatives according to the invention have the following structure ##STR1## wherein X denotes O, S, (CF 2 ) m , C(CF 3 ) 2 or CF 2 --CF(CF 3 ) (m=1 to 10), and R stems from...
|
|
|
5744575 |
Aromatic polyimide and gas separation
An aromatic polyimide having a recurring unit of the formula (I): ##STR1## wherein Ar is a divalent aromatic group having one or two benzene rings which has a sulfonate group of --SO 3 H, --SO 3 ...
|
|
|
5726275 |
Process for the batchwise preparation of poly-p-phenylene terephthalamide
Process for the batchwise preparation of poly-p-phenylene terephthalamide polymer by means of reacting approximately equimolar amounts of p-phenylene diamine and terephthaloyl dichloride in a...
|
|
|
5719253 |
Poly(amic acid) solution and polyimide film or polymide-coated material obtained therefrom
This invention provides a poly(amic acid) solution which does not contain aprotic polar solvents such as DMF, NMP, DMAc, DMSO, as well as a polyimide film obtained therefrom having appropriate...
|
|
|
5688631 |
Methods for producing polybenzoxazol precursors and corresponding resist solutions
Methods for producing solutions of polybenzoxazol precursors that are soluble in alkali and resist solutions based on such precursors. A dicarboxylic acid halogenide is reacted with a...
|
|
|
5677416 |
Flame-retardant wholly aromatic polyester and method for preparing the same
There are disclosed a wholly aromatic polyester represented by formula I with enhanced flame retardance and chemical stability, and a method for the preparing the same. The polymer is prepared in...
|
|
|
5670606 |
Crystalline form of poly(ethylene 2,6-naphthalate) and a method for its production
Disclosed herein is a novel crystalline form of low molecular weight poly(ethylene 2,6-naphthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(ethylene...
|
|
|
5665855 |
Polymers and copolymers originating from the addition of oligomers containing diamino and dihydroxy ends and of bisoxazinones or bioxazolinones, and process for obtaining them
Disclosed are polymers and copolymers containing at least one repeating unit of the formula ##STR1## in which X is O or NH; R is a single bond or a hydrocarbon chain; R' is a hydrocarbon chain...
|
|
|
5624752 |
Spun yarn of polybenzazole fiber
There is provided a spun yarn of a polybenzazole fiber having a single fiber fineness of 1 to 3 deniers and an average fiber length of 30 to 200 mm, the spun yarn having a tenacity of 15 g/d or...
|
|
|
5606007 |
Processes for preparing aromatic polycarbonates
According to the present invention, there is provided an improvement which comprises adding an acid compound and if necessary an epoxy compound to a reaction product resulting from melt...
|
|
|
5550205 |
Copolycarbonates and manufacturing method for them
To provide novel polycarbonates and a manufacturing method for them. Copolycarbonates obtained by copolymerizing at least two aromatic dihydroxy compounds and a compound capable of introducing...
|
|
|
5532334 |
Process for preparing polyamideimide resins having high molecular weight
A process for preparing polyamideimide resins having high molecular weights as described wherein major problems of prior art processes such as low heat resistance and low melt flowability are...
|
|
|
5527609 |
Crimped polybenzazole staple fiber and manufacture thereof
Crimped polybenzazole staple fibers which satisfy the following specifications at the same time: (1) 2≤number of crimps (number/inch)≤40 (2) 2≤crimp index (%)≤30 (3) 0.3≤crimp...
|
|
|
5506330 |
Polymerization method for preparing non-halogenated aromatic
The present invention relates to a polymerization method for preparing non-halogenated aromatic polyesters by a standard interfacial polymerization except the addition of a phase-transfer catalyst...
|
|
|
5475079 |
(CO) polycarbonate composition and process for preparing the same
A (co)polycarbonate composition mainly comprising a (co)polycarbonate having a limiting viscosity number [η] of 0.2 to 1.0 dl/g and terminal hydroxyl groups in an amount of 20 mole % or below,...
|
|
|
5453326 |
Polyester film coating with polyamido-polyethyleneimine
The present invention relates to a polymeric film in-line coated with polyamido-polyethyleneimine to render the film receptive to direct extrusion coating with other polymers or to ink adhesion and...
|
|
|
5399656 |
Aromatic polyesters and a method for producing the same
An aromatic polyester superior in heat resistance and mechanical properties and satisfactory in lightness and color tone is provided. The aromatic polyester has resorcinol structure, has the...
|
|
|
5391690 |
Process for producing (co)polycarbonate and (co)polycarbonate composition
A process for producing a (co)polycarbonate or a (co)polyestercarbonate having a high molecular weight and excellent hue, heat stability and mechanical properties by reacting a dihydroxyl compound...
|
|
|
5380814 |
Aromatic polycarbonate and process for production thereof
A process for producing an aromatic polycarbonate by reacting an aromatic dihydroxy compound, an alkali or alkaline earth metal base and a carbonyl halide compound comprises feeding a...
|
|
|
5362839 |
Polycarbonate having reduced carbonate byproduct content
A process for preparing polycarbonate wherein a chain terminator is added to the reaction mixture after substantial reaction of a carbonate precursor, a coupling catalyst is added to the reaction...
|
|
|
5320886 |
Hydrophilic crosslinking monomers and polymers made therefrom
This invention relates primarily to organofunctional monomers, predominantly dimethacrylates and/or diacrylates containing one or more (predominantly two carboxyl groups, with moieties that provide...
|
|
|
5317077 |
Polyarylates containing derivatives of the natural amino acid l-tyrosine
Bioerodible polyarylates derived from biocompatible dicarboxylic acids and natural amino acid-derived diphenol starting materials. Molded articles and controlled drug delivery systems prepared from...
|
|
|
5312896 |
Metal ion porphyrin-containing poly(imide)
The present invention relates to porphyrins and to metal ion-containing monomers and polymers. The monomer ##STR1## wherein A, R 1 ,R 2 ,R 3 , and R 4 defined herein, is used with dianhydride to...
|
|
|
5288837 |
Preparation of polycarbonate with subsequent addition of chain terminator and base
A process for preparing polycarbonate wherein a chain terminator is added to the reaction mixture after substantial reaction of a carbonate precursor, a coupling catalyst is added to the reaction...
|
|
|
5288835 |
Melt processable polyesters and poly(imide-esters)
Isotropic polyesters containing a repeat unit derived from 4,4'-bis(3-hydroxyphenoxy)biphenyl, and especially poly(imide-esters) containing that diol, trimellitic anhydride and at least one diamine...
|
|
|
5280102 |
Heat-resistant bonding materials
Heat-resistant bonding materials are composed of a polyimide precursor end-capped at molecule ends thereof and/or an imide compound formed from the polyimide precursor. They may also contain fine...
|
|
|
5278279 |
Process for producing (co)polycarbonate with transesterification catalyst and compound
A process for producing a (co)polycarbonate or a (co)polyestercarbonate having a high molecular weight and excellent hue, heat stability and mechanical properties by reacting a dihydroxyl compound...
|
|
|
5278277 |
Phenylquinoxaline copolymers
Phenylquinoxaline copolymers of the general formula: ##STR1## are described where R* signifies a polar unit. The application of these copolymers for producing highly heat-resistant dielectrics is...
|