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6380352 |
Polyester precursor purification process
Disclosed is a process for the purification of a polyester precursor wherein a polyester oligomer derived from terephthalic acid and one or more glycols or diols is purified or decolorized by...
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6368725 |
Method for producing a coating powder composition
Process for the preparation of a powder lacquer composition based on polyester by a) common or separate heating to a temperature of 120-200° C. of A) 99-40 wt. % polyester precondensates, and/or...
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6369157 |
Blend material including macrocyclic polyester oligomers and processes for polymerizing the same
A blend of a macrocyclic polyester oligomer and a polymerization catalyst as a one component ready-to-use material with a long shelf life enables production of parts from macrocyclic polyester...
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6362313 |
Allyl pendent homo- and co-polymeric systems
Allyl pendent benzazole polymer system having repeating units of the formula: wherein Bz is a benzazole unit selected from the group consisting of wherein X is —O—, —S— or —NH—, and...
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6359106 |
Production process and production apparatus for polybutylene terephthalate
Polybutylene terephthalate having good heat stability and excellent hydrolysis resistance is continuously produced in a series of a first reactor for reacting an aromatic dicarboxylic acid...
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6359105 |
Cross-linked polyester toners and process of making such toners
Cross-linked toner resin having linear portions and cross-linked portions of high density microgel particles, where the toner resin is an unsaturated polyester resin, is prepared using a liquid...
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6359173 |
Methods and devices for oxidizing a hydrocarbon to form an acid
Methods and devices for controlling the reaction of a hydrocarbon to an acid by making phase-related adjustments are disclosed. In order to improve reaction rate and reactivity of the oxidation, a...
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6355738 |
Polyester and process for preparing polyester
A process for preparing a polyester comprising the steps of blending (A) polyethylene terephthalate before solid phase polymerization having an intrinsic viscosity of 0.3 to 0.8 dl/g in an amount...
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6353084 |
Biodegradable polyestreramide and a process of preparing
Biodegradable polyesteramides as defined in the specification are obtained by reacting a mixture consisting essentially of a 1 ) a mixture consisting essentially of 35 to 95 mol % of adipic acid...
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6348563 |
p-hydroxybenzoic esters, plasticizer containing the same, polyamide resin composition and molded articles
The present invention provides a p-hydroxybenzoic ester represented by the formula (1) wherein R 1 represents a C 6 -C 10 straight-chain or branched-chain alkyl group, A 1 represents a C 2 -C...
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6344535 |
Polyether ester amides
Polyether ester amides having high water vapor permeability are disclosed. The amides which are prepared simply and reliably, crystallize quickly, are biodegradable and/or compostable, and are...
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6342578 |
Copolyester with high carboxyl end groups and a method for making
The present invention relates to a composition comprising: a copolyester of polyethylene terephthalate and a dicarboxylic acid or its ester equivalent, and not more than 100 microequivalents per...
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6342300 |
Biodegradable polymers based on natural and renewable raw materials especially isosorbite
The invention relates to biodegradable polycondensates, to the production of said polycondensates, and to their use for releasing specific substances. The polycondensates are derived from at least...
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6337137 |
Powder paint binder composition
The invention relates to a powder paint composition comprising a polymer that contains endomethylene tetrahydrophthalic acid units and a crosslinker. The polymer is obtained by preparing an...
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6326455 |
Methods for treating cobalt catalyst in oxidation mixtures resulting from oxidation of hydrocarbons to dibasic acids
This invention relates to methods and reactor devices for controlling the oxidation of hydrocarbons to dibasic acids, in the presence of a cobalt catalyst and a monobasic acid, such as acetic acid,...
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6316585 |
Process for the preparation of enzymatically degradable polymers
The present invention relates to the preparation of enzymatically degradable polymers, having repeating structural unit as shown hereinbelow: ##STR1## X--is selected from phenolic --OH of...
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6316587 |
Polyamide composition including metal salt
The present invention provides a polyamide composition comprising: a polyamide containing an alkylene oxide group; and a metal salt. The polyamide composition of the present invention has long...
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6312805 |
Cationic dyeability modifier for use with polyester and polyamide
A cationic dyeability modifier for incorporation into polyesters and polyamides to increase their affinity for basic dyes, said cationic dyeability modifier having the following formula: R 1 ...
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6313234 |
Coating system settable by heat
A heat settable, coating system of carboxyl-functional polyester resins, polyfunctional epoxy compounds and/or β-hydroxy alkyl amides, as well as further customary additives, if required. The...
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6309718 |
Large polyester containers and method for making same
The present invention relates to a large molded polyester container weighing greater than about 200, and preferably between about 200 and about 800 grams. Specifically, the present invention...
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6307001 |
Curable hybrid electron donor compounds containing vinyl ether
Hybrid electron donor compounds, suitable for use as adhesives or as components in adhesives, contain a carbon to carbon double bond attached to an aromatic ring and conjugated with the...
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6303738 |
Esterification process
A process for producing a polyester or copolymer thereof is disclosed. The process comprises contacting at least one carbonyl compound such as, for example, adipic acid, terephthalic acid, salt...
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6303745 |
Polyester and process for producing the same
A polyester having repeating units represented by formula (1): ##STR1## wherein R 1 represents a divalent hydrocarbon residue which in its structure may contain a heteroatom having no active...
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6300424 |
Hyperbranched polyesters and polyamides
Hyperbranched polyester and polyamide polymers are prepared by a one-step process of polymerizing a monomer of the formula A--R--B 2 so that high molecular weight globular polymers having a...
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6300467 |
Production of polytetrahydrofuran with terminal hydroxyl groups by changing the continuous and dispersed phase
The present invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding...
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6300463 |
Thermoplastic elastomers
Thermoplastic elastomeric polymers which contain polyether blocks having tetramethylene ether repeat units, and polyamide blocks, have improved elastomeric properties such as higher unload power...
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6300462 |
Process for preparing poly(ethylene-2,6-naphthalene dicarboxylate
There is disclosed a process for producing poly(ethylene-2,6-naphthalenedicarboxylate) and copolymers thereof having high molecular weight, low methyl end-group content, low diethylene glycol...
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6300456 |
Compounds with electron donor and electron acceptor functionality
Compounds containing both electron donor and electron acceptor functionality are suitable for use in adhesives. The electron donor group is a carbon to carbon double bond attached to an aromatic...
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6297351 |
Polybenzoxazole resin and precursor thereof
A polybenzoxazole precursor having recurring units represented by the following general formula (1) and a polybenzoxazole resin having a structure obtained by cyclizing the polybenzoxazole...
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6288270 |
Methods for controlling the reaction rate of a hydrocarbon to an acid by making phase-related adjustments
Methods for controlling the reaction rate of a hydrocarbon to an acid by making phase-related adjustments are disclosed. In order to improve reaction rate of the oxidation, a single phase at the...
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6284864 |
Permanent deep-dye polyester
The invention provides a method of making a copolyester and a resulting copolyester fiber that has increased dyeability and dye retention properties while maintaining good physical properties for...
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6284845 |
Low temperature cure carboxyl terminated polyesters
The present invention is directed to a powdered coating composition which includes a carboxyl terminated polyester, epoxy compounds and an onium catalyst or β-hydroxyalkylamide which provide...
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6277502 |
Photocrosslinkable silane derivatives
The invention relates to novel crosslinkable, photoactive silane derivatives of the formula I ##STR1## mixtures of silane derivatives of the formula I and mixtures of silane derivatives of the...
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6268460 |
Processes and materials for aligning liquid crystals and liquid crystal displays
The present invention provides a process for preparing an optical alignment layer for aligning liquid crystals and liquid crystal displays comprising exposing polyimide layers with polarized light....
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6268465 |
Hydrolysis-resistant aliphatic polyester amides, their production and use
An aliphatic polyester amide which is hydrolysis-resistant includes a ternary polycondensation product of monomeric constituents composed of a monomeric constituent A which is at least one diol...
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6268464 |
Unsaturated polyester resins
The invention relates to unsaturated polyester resins with higher molecular weight, low viscosity and high solubility specially in reactive diluents. The invention also relates to a method for the...
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6261686 |
Copolyester fiber
The present invention provides a copolyester fiber consisting of a copolyester with primarily C 2 -4 alkylene terephthalate units and a process for producing these copolyester fibers. The...
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6262223 |
Triamine-modified polymides having improved processability and low melt flow viscocity
Addition-cured polyimides that contain the reaction product of an aromatic triamine or trianhydride analogue thereof, a reactive end group such as 5-norbornene-2, 3-dicarboxylic acid, ester...
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6262220 |
Polyester compositions
Polyester compositions containing terephthalate, 2,6-naphthalate and/or isophthalate moieties, and showing improved properties are disclosed.
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6261690 |
Spherical colored polyester particles, process for their preparation, and their use for powder coatings
The invention relates to homogeneously colored polyester particles having a mean particle size <50 μm and a monomodal particle size distribution with a span (=d90-d10/d50)≤2.5, which can be...
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6258897 |
Polyester polyols of low molar mass, their preparation and use in coating compositions
Low molar mass polyester polyols having a weight-average molar mass M, of not more than 2000 g/mol, with hydroxyl numbers of from 80 to 300 mg/g and acid numbers of from 5 to 35 mg/g, comprising...
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6255441 |
Titanium-containing catalyst composition and processes therefor and therewith
A catalyst composition is disclosed. The composition comprises a titanium compound, a solubility promoter, a phosphorus source, a solvent, and optionally a sulfonic acid, a cocatalyst, or both. The...
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6255405 |
Light-absorbing polymers and application thereof to anti-reflection film
A high-performance anti-reflective coating which highly absorbs a given light, e.g., deep ultraviolet rays, tenaciously adheres to substrates upon coating formation, is satisfactory in covering,...
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6252036 |
Process for producing polycarbonate resin
The purpose of this invention is to produce a stabilized terminal-blocked polycarbonate resin with a limited number of the terminal hydroxy groups having excellent thermal stability, color...
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6242560 |
Thermoplastic polyester elastomer and composition comprising the same
A thermoplastic polyester elastomer having a crystalline melting point which satisfies the relationship: y≥200+0.5x, a Vicat softening point which satisfies the relationship: z≥50+1.5x, and a...
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6242509 |
Gels including bioactive components
An ester-terminated dimer acid-based polyamide may be blended with a solvent to form a gel. The solvent may be flammable, and a wick may be added to the resulting gel so as to form a candle....
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6242559 |
Functionalized hydroxy fatty acid polymer surface active agents and methods of making same
The present invention provides methods for the polymerization and functionalization of hydroxy fatty acids to provide surface active agents. The surface active agents can be nonionic, cationic,...
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6242558 |
Modified polytrimethylene terephthalate
A 1,3-propanediol-based aromatic polyester such as polytrimethylene terephthalate is modified by reaction with a hindered phenolic acid or ester to provide an endcapped polyester which has improved...
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6239249 |
Method for producing a copolymerized polyester resin
A method for producing a copolymerized polyester resin, which comprises subjecting a dicarboxylic acid component containing terephthalic acid or its ester derivative as the main component and a...
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6239200 |
Composition and process for preparing high molecular weight polyester
A composition suitable for use as a starting material for preparing a high molecular weight polyester through melt polymerization and solid state polymerization is disclosed. The composition...
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