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6120889 |
Low melt viscosity amorphous copolyesters with enhanced glass transition temperatures
The invention relates to an amorphous copolyester having a maximum melt viscosity at 1 radian/second and at about 260 to about 290° C. of about 12000 poise, a glass transition temperature ranging...
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6121413 |
Heat treatment of ultra high molecular weight polyethylene
The present invention provides a method for reducing the modulus of elasticity of a polymeric article, while at the same time maintaining its yield strength, crystallinity and elongation to rupture...
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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...
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6117968 |
Interfacial method for preparing copolyestercarbonates
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...
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6114494 |
Polyimide material and method of manufacture
A fully imidized cresylic acid soluble polymer comprising 4,4'- oxydiphthalic anhydride (ODPA), 3,4,3',4',-biphenyltetracarboxylic dianhydride (BPDA), 3,4'-oxydianiline (ODA), and 4,4'-oxydianiline...
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6114497 |
Polybenzoxazole resin and precursor thereof
Polybenzoxazole precursors are used to prepare resins with good electrical characteristics and thermal characteristics as well as low water absorption.
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6114492 |
Process for producing liquid crystal polymer
A potassium catalyst is used in combination with a cobalt catalyst to increase the reaction rate and/or reduce the reaction temperature of a melt polymerization process for producing an anisotropic...
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6111054 |
Products obtainable by salt formation from polyamines and the use thereof as dispersing agents for pigments and extenders
The present invention relates to a dispersing agent for pigments or extenders which is obtainable by salt formation from an amine-functional compound by means of an acid, wherein a polyamine which...
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6107443 |
Methods for solid state polymerizing polyesters utilizing carbon dioxide
The present invention provides processes for preparing polyesters. The processes include (a) providing a polymerization medium comprising carbon dioxide, (b) contacting a monomer capable of forming...
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6107452 |
Thermally and/or photochemically crosslinked electroactive polymers in the manufacture of opto-electronic devices
Preparation of thermally and/or photochemically crosslinkable oligomeric precursors and the use of those oligomeric precursors in preparing crosslinked electroactive polymers are described. The...
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6107447 |
Cholesteric phase-forming polymers, process for their preparation and their use
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6107438 |
Method of producing polyamide resin
A method of producing a polyamide resin by reacting with at least one diamine compound, at least one linear polyester resin consisting of at least one dicarboxylic acid component and at least one...
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6107444 |
Thermoplastic composition based on a transparent thermoplastic (co) polymer containing polyamide particles which can be used for light-scattering shaped articles
A thermoplastic composition for a light-scattering shaped article comprises a transparent thermoplastic polymer, especially a (meth)acrylic (co)polymer and polyamide particles having an average...
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6103858 |
Aqueous dispersion of a biodegradable polyester and its use thereof
The aqueous dispersion of a biodegradable aliphatic-aromatic polyester is useful as a binder for nonwovens and for coating paper.
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6103930 |
Recovery of 2,6-naphthalene dicarboxylic acid from polyesters
This invention concerns a method for recycling polyesters comprising the hydrolysis of polyesters containing repeat units derived from 2,6-naphthalene dicarboxylic acid in the presence of a...
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6103438 |
Polyester resin for toner, process for its production and toner
A polyester resin for toner comprising an acid component containing at least one selected from the group consisting of aromatic dicarboxylic acids and their lower alkyl esters, and an alcohol...
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6100371 |
Polyimide for optical communications and method for preparing the same
A polyimide for optical communications has a monomer, represented by the formula (1), as a repeating unit: ##STR1## wherein X 1 and X 2 are independently selected from the group consisting of...
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6093786 |
Process for preparing polytrimethylene terephthalate
Polytrimethylene terephthalate is prepared in a process which includes adding a hindered phenol and an aromatic organophosphite to the polymerization reaction mixture. The process generates a...
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6084058 |
Composition for liquid crystal aligning film, liquid crystal aligning film, liquid crystal displays and liquid crystal display element
A composition for a polyimide type liquid crystal aligning film characterized in that a diamino compound constituting polyimide contains one, two or more diamine selected from 4,4'-diaminodiphenyl...
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6075113 |
Wheel composition
A slow speed wheel with high abrasion resistance, good riding attributes and excellent bounce from a composition comprising at least 20 wt % of a segmented thermoplastic copolyester or a blend of...
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6072020 |
Fluorinated polymer purification
Purification process of amorphous polymers comprising the following steps: a) the amorphous polymer is dissolved in a fluorinated solvent; b) the solution containing the polymer is...
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6066711 |
Polyester polymer and its moldings
A polyester polymer includes a dicarboxylic acid or its ester-forming derivative and a dihydroxy compound, in which the dicarboxylic acid contains an alicyclic dicarboxylic acid and optionally an...
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6063894 |
Process for purifying polymers using ultrasonic extraction
A process for purifying a substantially unoriented polymer containing an impurity by means of ultrasonic leaching or extraction is described. The process involves contacting a substantially...
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6063464 |
Isosorbide containing polyesters and methods for making same
A polyester polymer and method for making the polyester, wherein the polyester is prepared by (1) combining in a reactor a monomer containing a diacid moiety; a monomer comprising a diol moiety;...
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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...
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6063495 |
Polyester fiber and methods for making same
A polyester fiber made from a polymer having ethylene glycol moieties, isosorbide moieties and terepthaloyl moieties, and the method of making the fiber is described. The polyester fiber is used to...
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6060556 |
Process for preparing reactive latex blends which are chemically and physically stable until film formation
This invention provides the composition, preparation, and end-use of waterborne crosslinking technology based compositions prepared from water-based latexes. The invention provides a water-based...
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6060581 |
Optical alignment polymer, optical composition, alignment layer formed using the same and LCD having the alignment layer
An optical alignment composition including self-photosensitive polyimide having a benzophenone moiety and an active hydrogen moiety, and an LCD having the alignment layer formed of the optical...
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6054551 |
Polyester comprising a residue of isophthalic acid, terephthalic acid, ethylene glycol and an aromatic diol derivative
A polyester having increased UV absorption comprising (i) a residue of a dicarboxylic acid component comprising terephthalic and from about 1 to about 20 mole % of isophthalic acid, (ii) a residue...
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6048521 |
Copolymers of tyrosine-based polyarlates and poly(alkylene oxides)
Implantable medical devices and drug delivery implants containing polyarylate random block copolymers are disclosed, along with methods for drug delivery and for preventing the formation of...
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6048959 |
Tough soluble aromatic thermoplastic copolyimides
Tough, soluble, aromatic, thermoplastic copolyimides were prepared by reacting 4,4'-oxydiphthalic anhydride, 3,4,3',4'-biphenyltetracarboxylic dianhydride and 3,4'-oxydianiline. Alternatively,...
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6046300 |
Liquid-crystalline resin and thermoplastic resin composition
A liquid-crystalline resin with ester bonds, which has a hydroxyl terminal concentration of not smaller than 15×10 -6 equivalents/g, and a thermoplastic resin composition comprising the...
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6043306 |
Flame-retardant thermoplastic resin composition
Provided by the present invention are a flame-retardant thermoplastic resin composition which consists of (a) 100 parts by weight of a thermoplastic resin, (b) 5 to 60 parts by weight of a...
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6039902 |
Methods of recycling catalyst in oxidations of hydrocarbons
This invention relates to methods of recycling catalyst in oxidations of hydrocarbons, such as cyclohexane for example, to respective intermediate oxidation products, such as adipic acid for...
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6031068 |
Polyimide composition and base tape for TAB carrier tape and flexible printed circuit board made from said composition
The object of the present invention is to provide polyimide composition having such excellent property as low water absorption and low hygroscopic swelling, and a base tape for a TAB carrier tape...
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6028160 |
Biodegradable vapor corrosion inhibitor products
Biodegradable resin products consisting essentially of a polymeric resin of polyethylene, starch, polyesters such as polylactic acid, or other suitable polyesters. In admixture with the resin is a...
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6028159 |
Polyamideimide for optical communications and method for preparing the same
A polyamideimide for optical communications, having a minimum light absorption loss in a near infrared light wavelength range, high thermal stability and excellent film processibility, and a method...
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6025460 |
Polyamide precursor
The service life of fiber-reinforced polyimide composites in a high temperature oxidative environment is extended by coating with a polyimide coating precursor solution that is synthesized by...
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6022947 |
Light-colored, low molecular weight phenolic-modified rosin esters
Light-colored phenolic-modified rosin esters, suitable for use as, for example, tackifiers in adhesive compositions, are prepared by reacting together rosin, a phenolic compound, formaldehyde or a...
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6008315 |
Manufacturing method for bisphenols and a manufacturing method for polycarbonate
A phenol and a ketone are reacted to form bisphenol, and the liquid bisphenol obtained or a mixed solution of said solution and a phenol is filtered through a calcined metal filter to obtain...
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6001952 |
Polyester containing benzylidene having reduced fluorescence
A polymer composition having naphthalenedicarboxylic residue includes a fluorescence quenching benzylidene compound capable of absorbing ultraviolet light radiation. In a preferred embodiment, the...
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6001951 |
Aromatic polycarbodiimide and film thereof
An aromatic polycarbodiimide comprising a structural repeating unit represented by the following formula (I): ##STR1## wherein n is an integer of 2 to 200.
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5998572 |
Methods and devices for controlling the oxidation of a hydrocarbon to an acid by regulating temperature/conversion relationship in multi-stage arrangements
Methods and devices for controlling the oxidation of a hydrocarbon to an acid by regulating the temperature hold-up time, and conversion in consecutive reaction zones. The temperature in the...
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5998565 |
Composition comprising a plastic and an additive
The invention relates to a composition comprising a plastic and an additive, the additive being present in a dendrimer having functional end groups, said functional end groups being provided, at...
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5994483 |
Process for preparing polymer blends by recycling high-performance polymers
The invention relates to a process for preparing blends of high-performance polymers. The particular features are that at least two single-type polymers are treated with a solvent or a solvent...
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5989758 |
Liquid crystalline polyesters, their composition, and their uses
There are provided liquid crystalline polyesters comprising 4'-hydroxy-4-stilbenecarboxylic acid type units, dicarboxylic acid units acting as a mesogen such as 4,4'-stilbenecarboxylic acid and...
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5986039 |
Branched polyesters prepared from hydroxyfunctional components with functionality in excess of two and their use in physiological separation vehicles
Polyesters are described which are substantially the condensation products of at least one dicarboxylic acid, at least one volatile diol and at least one hydroxyl-functional component with...
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5986036 |
Substrate material for holographic emulsions utilizing fluorinated polyimide film
A new holographic substrate utilizing flexible, optically transparent fluorinated polyimides. Said substrates have extremely low birefringence which results in a high signal to noise ratio in...
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5981688 |
Continuous preparation of polytetrahydrofuran by a transesterification cascade with specific destruction of foam
A process for preparing hydroxyl-containing polymers and, in particular, a process for preparing polytetrahydrofuran with terminal hydroxyl groups from the corresponding acyloxy-containing polymers...
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5977291 |
Copolyesters and methods of their production
A hydroxycarboxylic acid copolyester of R-stereospecific configuration contains a majority of first repeating units capable of forming a highly crystalline high-melting homopolyester and a minority...
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