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5703204 |
Method for reprocessing aqueous extract solutions obtained in the production of PA 6 or copolyamide
The invention relates to a method for recycling (reprocessing) aqueous extract solutions obtained in the production of polyamides. The method for reprocessing the aqueous extract solutions obtained...
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5700900 |
Copolyamides with long-chain polyamide units
A copolyamide composition and article molded therefrom, the molded article being transparent, being especially rigid, tough and cold impact resistant, having good resistance to solvents, and...
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5698660 |
Melt spinnable copolyamines with improved modulus of elasticity, filaments produced from them and use of such filaments
A copolyamide with an improved modulus of elasticity for the melt-spinning of filaments consists of at least 75 wt. % of a linear polyamide base polymer with a melting point of 150°-320° C. and...
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5698658 |
Linear very high molecular weight polyamides and process for producing them
A linear polyamide having a weight average molecular weight above 200,000 is made by heating a lower molecular weight molten polyamide with thorough mixing at a temperature of about 265°-300° C....
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5696226 |
Resin composition and molded article thereof
A resin composition containing a hydrotalcite compound in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the thermoplastic resin, the hydrotalcite compound having fine...
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5696235 |
Polyimide AMD process for producing the same
Novel polyimides which are soluble in various organic solvents and excellent in thermal resistance, processability are disclosed. The polyimides comprise repeating units represented by the...
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5696227 |
Process for the batchwise preparation of polylaurolactam
A process for the batch preparation of polylaurolactam in the melt, involving introducing molten, anhydrous laurolactam at a temperature of up to 280° C. into a pressure-resistant reactor heated...
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5693744 |
Amorphus polyamides having second order nonlinear optical property, and method for preparing them
An amorphous polyamide represented by the formula(2) ##STR1## in which each R is at least one alkylene radical having 1 to 10 carbon atoms, R' is an electron acceptor group represented by the...
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5688901 |
Partly aromatic copolyamide molding materials having high crystallinity
Partly aromatic semicrystalline thermoplastic polyamide molding compositions contain A) from 40 to 100% by weight of a copolyamide composed of a 1 ) from 30 to 44 mol % of units which are...
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5686557 |
Polyamide resin which can be dissolved in alcohol solvent, composition thereof, and method of use thereof
A polyamide resin is disclosed comprising: a diamine component comprised of at least 50% by mole based on the total diamine component of diamine having diphenyl methane structure substituted by...
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5686555 |
Absorbents for acids and lyes
The present invention relates to absorbents for aqueous acids or lyes comprising cross-linked, polycationic homopolymers and topolymers of quaternized, monoethylenically unsaturated carboxylic acid...
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5686556 |
Process for the preparation of an α-amino ω-ester monoamide and process for the manufacture of a polyamide
Process for producing α-amino ω-ester monoamides such as H 2 N--(CH 2 ) 6 --NH--CO--(CH 2 ) 4 --CO--OCH 3 by reacting a diacid with a diamide at a diamine/diester molar ratio of 0.8 and 1.2...
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5684119 |
Solutions of polyamideimides in γ-butyrolactone, process for obtaining them and the yarns thus obtained
Directly shapeable clear solutions of polyamide imides and a method for preparing same are provided. The solutions are obtained by polycondensation in γ-butyrolactone (γBL) in substantially...
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5684121 |
N-vinyl lactam polymer containing tablets of low friability and high rate of dissolution
This invention relates to a coprecipitated binder composition used for the compression of pharmaceutically and agriculturally active components to provide a non-friable, readily soluble or...
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5684120 |
Colorless, transparent copolyamides, their preparation, and molded articles made from these copolyamides, their blends or alloys
Colorless, transparent copolyamides, made up of monomers based on cycloaliphatic diamines and aromatic dicarboxylic acids and a maximum of 20 mol % of further polyamide-forming aliphatic monomers,...
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5677417 |
Tetraaroxyperylene-3,4,9,10-tetracarboxylic polyimides
Polymeric tetraaroxyperylene-3,4,9,10-tetracarboxylic diimides of the formula I ##STR1## (R 1 : denotes identical or different aryl radicals which may be substituted by cyano, nitro, halogen, C 1 ...
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5674972 |
Polyamide-based formulations
This invention relates to polyamide-based formulations flame retarded with synergized brominated flame retardants and having good thermal stability.
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5663283 |
Polyamide, electrophotographic photosensitive member employing the polyamide, and electrophotographic apparatus, device unit and facsimile machine employing the member
An electrophotographic photosensitive member, has an electroconductive support, an interlayer, and a photosensitive layer provided in the order named. The interlayer contains a polyamide having a...
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5663284 |
Copolymerized polyamide and a production process/thereof
A copolymerized polyamide, comprising amide bonds formed by an aliphatic diamine with 4 to 14 carbon atoms and terephthalic acid, with the existence ratios of distributed respectively adjacent...
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5659007 |
Process for producing aromatic polyamide film
A process for producing an aromatic polyamide film comprising forming a thin layer of an optically isotropic dope in which an aromatic polyamide is dissolved in a polar amide, immersing the thin...
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5650482 |
Adhesion promoters
An at least two-step process for the preparation of polyamide resins wherein, in the first step, polyvalent carboxylic acids, optionally together with monovalent carboxylic acids, are reacted with...
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5648418 |
Low molecular weight copolymer amides
A low molecular weight copolymer reaction product of a copolymer acid of an α-olefin and an unsaturated carboxylic acid, preferably an α,β-ethylenically unsaturated carboxylic acid, and at least...
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5646234 |
Production of fibers or films using specific forming solutions and the fibers of films obtainable thereby
A process for producing fibers or films by the steps of: a) preparing an aromatic polyamide by polycondensation of dicarbonyl dihalides or mixtures thereof with at least two diamines in...
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5644016 |
Maleimide copolymer as alignment layer for liquid-crystal displays
Use of a polymer containing maleimide units of the formula I ##STR1## in which R 1 is hydrogen, an acyclic or cyclic, aliphatic, aromatic or araliphatic radical which is chiral or achiral, can be...
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5644020 |
Thermoplastically processible and biodegradable aliphatic polyesteramides
The invention relates to thermoplastically processible aliphatic polyesteramides which are biodegradable (compostable).
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5641856 |
Cross-linked resin
A re-moldable cross-linked resin comprising polymer chains which are connected to one another via Diels-Alder adducts obtainable from a dienophile and a diene, the latter being a 2,5-dialkyl...
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5641855 |
Water-soluble condensation products of amino-containing compounds and crosslinkers, preparation thereof and use thereof
There are described water-soluble condensation products of amino-containing compounds and crosslinkers, obtainable by reacting (a) polyalkylenepolyamines, polyamidoamines, ethylene-imine-grafted...
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5633034 |
Process for forming a circuit assembly
The invention relates to a process for forming a circuit assembly comprising (i) coating onto a substrate a layer of polyamic ester selected from a unique class of polyamic esters; (ii) imidizing...
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5627258 |
Binder for use in metal powder injection molding and debinding method by the use of the same
By the use of a binder comprising (a) 40 to 70 wt % of a water-soluble amide material and/or water-soluble amine material and (b) 25 to 60 wt % of a polyamide resin component substantially composed...
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5621067 |
Wholly aromatic polyamides with improved flame resistance
Wholly aromatic polyamides and their shaped articles containing at least 85 mole percent of repeat units of m-phenylene isophthalamide: ##STR1## and repeat units of selected aromatic diamines and...
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5618909 |
Light stabilized polyamide substrate and process for making
A dyed or undyed polyamide substrate, preferably film, fiber, or an article manufactured therefrom, with excellent breaking strength retention and ultimate elongation retention, is prepared by...
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5612425 |
Molding compositions based on modified polyaryl ethers
Molding compositions based on polyaryl ethers A, are obtainable by reacting polyaryl ethers I with repeating structural elements ##STR1## or derivatives thereof substituted by C 1 -C 6 -alkyl,...
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5606012 |
Polyetheramidoamine hydrogels as heparinizable materials
Polymeric polyetheramidoamine hydrogel materials, which are capable of complexing heparin in physiological conditions are herein described. Said materials are useful in the manufacturing of medical...
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5603925 |
Clear or translucent tack-free antiperspirant stick or gel composition and manufacturing method
Disclosed is a stick or gel composition, which can be clear or translucent, for combatting body malodor (e.g., an antiperspirant composition). The composition contains an antiperspirant active...
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5602200 |
Polyamide/polyolefin blends
A polymeric composition includes a polyamide; an unmodified polypropylene or unmodified polyethylene; optionally a carboxylic acid or maleic anhydride-grafted ethylene-propylene-diene elastomer;...
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5599898 |
Insoluble, only slightly swellable polymers containing amino groups, their preparation and their use
Abstract of the Disclosure: Insoluble, only slightly swellable polymers containing amino groups, which can be obtained from popcorn polymers containing units of the structure ##STR1## where R and R...
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5596073 |
Polyimide solutions and method of obtaining them
The present invention relates to solutions which can be directly shaped in anhydrous dimethylalkyleneurea, based on a polyimide obtained from an aromatic dianhydride and an aromatic diisocyanate....
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5596070 |
High molecular weight polyamides obtained from nitriles
High molecular weight polyamides are prepared by (a) polymerizing monomers selected from the group consisting of aminonitriles of the formula I H 2 N--(CH 2 ) m --CN ...
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5587447 |
Copolyamide production method
A method for producing a copolyamide, which comprises (1) heating either one dicarboxylic acid selected from the group consisting of adipic acid and a mixture containing 40 mol % or more of adipic...
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5587452 |
Polyamide-imide
The invention relates to a polyamide-imide containing recurring units according to the formula ##STR1## where Y is an arylene group, and R and R' are alkylene groups, in which at least 50 mole %...
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5583177 |
Polyamide resin composition
There is disclosed a polyamide resin composition containing: (A) 85 to 95 parts by weight of a polyamide resin; (B) 5 to 15 parts by weight of wollastonite; (C) 3 to 10 parts by weight, to 100...
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5578697 |
Polyimide precursor, bismaleimide-based cured resin precursor and electronic parts having insulating members made from these precursors
A polyimide precursor having a molecular structure obtained by polymerizing (a) 0.97 to 1.03 molar equivalent of a diamine component containing 0.40 molar equivalent or more of aromatic diamine...
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5576415 |
Method for drying polyamide and method for solid-phase polymerization of polyamide
There are disclosed a method for drying and a method for solid-phase polymerizing a crystallizable polyamide being in an amorphous state which comprises regulating the moisture concentration in the...
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5574119 |
Thermoplastic resin film and a method for producing the same
A thermoplastic resin film at least oriented in the transverse direction with minimized bowing phenomenon is provided. The thermal shrinkage stress in the transverse direction of the film satisfies...
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5574128 |
Polymers comprising both polyamide-diacid/polyetherdiol blocks and polyamide-diacid/polyetherdiamine blocks, and their preparation
Polyetheresteramides, characterized in that they comprise both of the following repeating entities: ##STR1## in which X represents the residue of a polyamide-diacid oligomer with an Mn of between...
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5571891 |
Aromatic copolyamides, production thereof, formed structures and production thereof
Aromatic copolyamides, production thereof, formed structures and production thereof Described are aromatic copolyamides comprising the structural repeat units of the formulae I, II and III ##STR1##...
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5571890 |
Polyetheramidoamine superabsorbent hydrogels
Polyetheramidoamine hydrogels consisting of polyetheramidomaine and/or polyamidoamine prepolymers crosslinked by Michael's nuceophilic polyaddition with alpha-omega-diamino monomers or with...
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5567797 |
Polyamide composition and process for its production
The object of the present invention is a polyamide composition containing, in reference to the polyamide composition 0.1 to 1 wt. % terephthaldialdehyde and/or its acetals of C 1 --C 4 alcohols...
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5554765 |
Bisimide compounds, polyimide resin composition prepared therefrom, and carbon fiber-reinforced polyimide resin composition
A moldable polyimide resin composition which has melt-flowability and excellent processability in addition to essential heat-resistant of polyimide and comprises an aromatic bisimide compound and...
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5554722 |
Aromatic polyamide compositions with improved electrostatic properties, formed structures produced therefrom, and use and production thereof
Aromatic polyamide compositions with improved electrostatic properties, formed structures produced therefrom, and use and production thereof. Described are compositions comprising an aromatic...
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