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4873060 |
Process for the preparation of aromatic polyesters and apparatus for carrying out this process
In a process for the preparation of aromatic polyesters by polycondensation of diphenols with chlorides of aromatic dicarboxylic acids by the two-phase interfacial polycondensation process, in...
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4861856 |
Process for the preparation of polyketone and poly(ketone-sulfone) polymers
Disclosed is an improved process for the preparation of polyketone and poly(ketone-sulfone) polymers by the reaction of at least one dicarboxylic acid with certain aromatic compounds containing at...
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4855390 |
Process for preparing polyesterimide from bis(hydroxyphthalimide)
The present invention provides a bis(hydroxyphthalimide) prepared by reacting 4-hydroxyphthalic anhydride and an organic diamine in the presence of an organic solvent under heating. The...
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4849503 |
Novel poly(aryl ethers)
Described herein are novel poly(aryl ethers) based on 2,5-di-t-butylhydroquinone. These poly(aryl ethers) have excellent high temperature, oxidative and chemical resistance, as well as good...
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4847350 |
Preparation of aromatic heterocyclic polymers
Rapid process for the formation of heterocyclic aromatic polymers by contacting one or more appropriate multifunctional aromatic compounds, such as a diaminobenzenediol, a terephthaloyl halide...
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4845183 |
Heat resistant polyamide and polybenzoxazole from bis-((amino-hydroxyphenyl)hexafluoroisopropyl)diphenyl ethers
Heat resistant, shapable, hydroxy and/or alkoxy-substituted polyamides derived from at least one diamine selected from unsubstituted and substituted...
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4843141 |
Melt-processable aromatic polyesteramide having repeating 2,2'-substituted biphenylene radicals
Melt-processable polyesteramides capable of exhibiting melt-phase anisotropy at temperatures of approximately 360° C. and lower are disclosed. The polyesteramides contain certain essential...
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4837299 |
Process for making polyimides
A process for making thermoplastic polyimides which involves reacting an aromatic dianhydride with an organic diamine in the presence of a tertiary amine in an inert solvent to form a polyamide...
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4837300 |
Copolyimide with a combination of flexibilizing groups
Novel copolyimides are prepared by reacting one or more aromatic dianhydrides with a meta-substituted phenylene diamine and an aromatic bridged diamine. The incorporation of meta-substituted...
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4835249 |
Process for preparing polyimides
A process for making certain polyimides involves dissolving substantially equimolar amounts of an aromatic dianhydride and an organic diamine in a high-boiling, aprotic solvent, heating the...
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4831111 |
Cross-linked resin, composition from bis(2-oxazoline)
A cross-linked resin produced by the reaction of a bis(2-oxazoline) compound with a dicarboxylic acid anhydride, and optionally also with at least one selected from the group consisting of a...
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4829143 |
Modified poly(aryl ether ketones) derived from biphenol
Described herein are poly(aryl ether ketones) derived from biphenol which can be improved by incorporating bisphenol comonomers. The resulting polymers have lower melting points while the Tg is...
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4814417 |
Process for producing a liquid crystalline polyester polymer of a cyclohexanedicarboxylic acid and an aromatic diol with pyridine/thionyl chloride catalyst
A process for directly producing liquid crystalline polymers from cyclohexanedicarboxylic acids and aromatic diols is provided. These raw materials can be converted into polyesters capable of...
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4798882 |
Branched polycarbonate from methylene-bis-naphthalene compound
Branched, thermoplastic polycarbonates, suitable for being processed by means of the blow-moulding technique, are prepared by means of copolymerization with methylene-bis-naphthalene compounds.
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4795797 |
Branched polycarbonate from aliphatic polyicarboxylic acids or derivatives thereof, and process for their preparation
Branched, thermoplastic polycarbonates, suitable for being processed by means of the blow-moulding technique, are prepared by means of copolymerization with aliphatic polyfunctional acids or their...
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4794157 |
Polyetherimide copolymers, and method for making
The intercondensation of aryldiamine and a mixture of oxydiphthalic anhydride and aromatic bis(ether anhydride), such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]-propane dianhydride, have been found...
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4792597 |
Melt-processable polyesteramides having para-linked, substituted-phenylene radicals
Aromatic polyesteramides exhibiting melt processability are disclosed. The polyesteramides comprise certain essential repeating units of the formulas ##STR1## wherein X is alkyl, alkoxy,...
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4788275 |
Aromatic copolyester carbonate endcapped with chromanyl I compound
An aromatic copolyestercarbonate having from about 35 to 95 mole percent ester content which comprises isophthalate or isophthalate and terephthalate units, said copolyestercarbonate endcapped with...
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4788273 |
Branched polycarbonates containing tetracarboxyfunctional heterocyclic compounds and process for their preparation
Branched, thermoplastic polycarbonates, suitable for being processed by means of the blow-moulding technique, are prepared by means of copolymerization with tetrafunctional heterocyclic compounds.
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4788276 |
Copolyester carbonate with cycloalkylphenyl end groups
Thermoplastic aromatic polycarbonate containing the polymerized reaction products of (i) at least one dihydric phenol, (ii) a carbonate precursor, and (iii) at least one end-capping agent...
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4786708 |
Use of films of polycondensates
Films from aromatic polyesters and from aromatic polyestercarbonates are excellently suitable as electrically insulating films, for example as dielectric for capacitors and as conductor track films.
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4786707 |
Branched polycarbonate derived from single-ring aromatic compound
In the present invention disclosed are high-molecular-weight, soluble, thermoplastic branched polycarbonates endowed with improved properties, and suitable to blow-moulding fabrication. Such...
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4783522 |
Aromatic polythioetherimide
An aromatic polythioetherimide having a recurring unit of the following general formula (II): ##STR1## wherein --Ar--, which may be the same or different in the polymer, each represents a divalent...
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4782132 |
Process for producing a copolyester
A process for producing a copolymeric polyester, which comprises a first step of preparing a copolymeric oligomer by reacting a starting material oligoester or polyester having repeating units of...
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4778859 |
Tetramine derived polyimide with pendant unsaturation, and various photosensitive compositions therefrom
A curable composition comprising (a) a curable polyimide soluble in organic solvents and (b) a polymerization initiator as essential components, said polyimide consisting of recurring units...
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4774315 |
Copoly isophthalate carbonate end-capped with paracumylphenol
A composition comprising a paracumylphenol end-capped aromatic copolyestercarbonate having from about 35 to 95 mole percent ester content which comprises isophthalate or isophthalate and...
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4772678 |
Liquid crystalline polymer compositions, process, and products
Novel liquid crystalline extended chain polymer compositions comprising a high concentration of one or more extended chain homopolymer(s), copolymer(s), or block polymer(s) and certain strong acids...
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4767838 |
Chain-extended poly(aryl ether ketones)
Described herein are novel crystalline chain extended poly(aryl ether ketones) which display excellent toughness, fabricability and very good high temperature and solvent resistance.
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4755585 |
Injection moldable polyamide imide from trimellitic anhydride end capped with aniline
Novel polymers and molding compositions are prepared from acyl halide derivatives of tricarboxylic acids and diamines and about 1 to about 10 percent by weight of phthalic anhydride, trimellitic...
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4754016 |
Process for preparing polyamide with organic phosphine/organic disulfide mixture condensing agent
A process for preparing a polyamide which comprises polycondensing a dicarboxylic acid and a diamine by using a combination of at least one phosphine and at least one disulfide as the condensing...
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4749769 |
Fully aromatic mesomorphic polyesters and their preparation
Fully aromatic mesomorphic polyesters which give a liquid crystalline filament-forming melt below 300° C. consist of (a) from 5 to 25 mol % of repeating units of the formula I ##STR1## (b) from...
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4749768 |
Process for producing thermoplastically processable aromatic polyamide with phosphorus catalyst
The invention relates to a process for producing aromatic polyamides by melt condensation of (i) aromatic diamines of the formula H 2 N--Ar'--X--Ar"--Y--Ar"--X--Ar--NH 2 where X=--O-- and...
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4748213 |
All-aromatic polyester resin composition
Improved all-aromatic polyester resin compositions are proposed which comprise an all-aromatic polyester resin and a polyether oil. They have excellent moldability and shock resistance while...
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4743674 |
Aromatic polyesters, processes for their preparation, and their use for the preparation of molecularly reinforced polymers
The invention relates to new aromatic polyesters based on terephthalic acid and hydroquinones, processes for their preparation from hydroquinone and terephthalic acid derivatives, and their use for...
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4742149 |
Production of melt consistent aromatic polyesters
The production of oxybenzoyl polyesters is facilitated by the incorporation of a salt, particularly an alkali earth metal salt, and preferably potassium sulfate, during the production enabling the...
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4737569 |
Process for the production of substantially monoester-free diaryl esters of aromatic dicarboxylic acids
An improved process for the preparation of a diaryl ester containing only small amounts of the corresponding monoesters comprises reacting a mixture of an aryl diacid, a monohydroxy aromatic...
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4728715 |
Wholly aromatic polyesters and preparation thereof
Wholly aromatic polyesters which form a liquid-crystalline fiber-forming melt below 300° C. and are composed of (a) from 10 to 25 mol % of repeat units of the formula I ##STR1## (b) from 5 to 15...
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4727131 |
Wholly aromatic mesomorphic polyester amides and the preparation thereof
Wholly aromatic mesomorphic polyester amides which form a liquid-crystalline fiber-forming melt below 320° C. and are composed of (a) from 5 to 35 mol % of repeat units of the formula I...
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4727130 |
Thermoplastically processible aromatic polyamides with chemically incorporated ether and sulfonyl groups; and method of manufacturing the same
This invention relates to a method of manufacturing aromatic polyamides having general formula (--CO--Ar--CO--NH--Ar'--X--Ar"--Y--Ar"--X--Ar'--NH--) m where Ar, Ar', and Ar" each represent an m-...
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4724257 |
Aromatic polythioetheramide-imide
An aromatic polythioetheramide-imide having a recurring unit of the following general formula (II): ##STR1## wherein --Ar--, which may be the same or different in the polymer, each represents a...
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4721772 |
Process for producing aromatic polyamide with polar solvent containing sulfolane
An aromatic polyamide having a high molecular weight is produced by a polycondensation reaction of an aromatic aminocarboxylic acid and/or a mixture of an aromatic dicarboxylic acid and an aromatic...
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4720538 |
Preparation of aromatic polyamide with phosphorus containing catalyst and dialkylamino pyridine cocatalyst.
A method of manufacturing polyamides from aromatic dicarboxylic acids and aromatic diamines in the presence of catalytic amounts of a phosphorous-containing catalyst and a 4-diakylaminopyridine as...
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4716211 |
Slurry process for producing high molecular weight crystalline polyaryletherketones
Described herein is an improved process for preparing poly(aryl ether ketones) by reacting nucleophilic coreactants with electrophilic coreactants under Friedel Crafts polymerization conditions,...
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4713435 |
Process for producing aromatic polyester
A process for producing an aromatic polyester by polycondensation of either (1) (a) aromatic hydroxycarboxylic acids containing at least 50 mole % of p-hydroxybenzoic acid, and/or ester-forming...
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4710547 |
Process for producing three-dimensionally crosslinked polyester having the liquid crystal structure
A polyester, being capable of the anisotropic property in the molten state and a thermotropic liquid crystals, or a composition comprising a low molecular weight polyester and a thermotropic...
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4710562 |
Stabilizing polyaryletherketones
Described herein is a process for stabilizing a poly(aryl ether ketone) produced by a Friedel-Crafts polymerization process which comprises adding a nucleophilic and/or an electrophilic capping...
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4701516 |
Copolyester-carbonate resin containing recurring divalent units from trimellitic acid derivative
A thermoplastic polyester-carbonate resin containing in the polymer chain, divalent moieties of the formula: ##STR1## wherein R represents aliphatic hydrocarbyl of from 1 to 9 carbon atoms,...
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4699971 |
Polycarbonate with cycloalkylphenyl end group
Thermoplastic aromatic polycarbonate containing the polymerized reaction products of (i) at least one dihydric phenol, (ii) a carbonate precursor, and (iii) at least one end-capping agent...
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4692506 |
Five-component copolyester, process for preparation thereof, and shaped articles thereof
A five-component copolyester not described in the prior art literature which comprises at least five components, i.e. (a) two aromatic dicarboxylic acid components composed of a major amount of an...
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4689391 |
Process for making polyetherimides
A process for making polyetherimides involving reacting an aromatic bis(ether anhydride) with an organic diamine in the presence of a solvent so as to form a polyamide acid. The polyamide acid is...
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