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4977239 |
Polybase from amino amido carboxylic acid, polyamine and difunctional alkylating agent
A water-soluble organic polybase which is useful for the cationization of asbestos-free, cellulose fiber filter media is prepared by reacting a mixture of a compound of the formula R 2 --CO--R 1...
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4968779 |
Adherent coating from ethylene diamine tetra acetic acid and methacryl comonomer
An adherent coating for calcium and magnesium containing minerals consists essentially of an integral block of the following structure: ##STR1## wherein R and R' are selected from the group...
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4954608 |
Copolymerized polyamic acid salts and process of producing them
A copolymerized polyamic acid salt having a recurring unit represented by following formula (I) and (II) and the process for preparing thereof. ##STR1## wherein (A) or (A') represents a formula...
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4948816 |
Spherical grains of polyamino acid and production method thereof
The present invention provides novel spherical grains of polyamino acid wh can be used as a filler in chromatography, cosmetic powder and the like. The spherical grains can be produced by a method...
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4948400 |
Separation membranes and process for preparing the same
Polyimide-based separation membranes of this invention are made from polyimides having repeating units of the general formulas (A) and (B) ##STR1## wherein Ar 1 and Ar 3 are tetravalent aromatic...
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4942220 |
Process for preparing poly-amide from nitrile and amine with catalytic complex
Polyamides are prepared from a carbonitrile and an amine by reacting by heating a mixture of a carbonitrile which is a dinitrile, an equivalent amount of a primary or secondary amine which is a...
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4933431 |
One step preparation of poly(amide-anhydride)
A method for synthetizing polyanhydrides in solution using coupling agents and a removable acid acceptor to effect a one-step polymerization of dicarboxylic acids. As used in the method, these...
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4931182 |
Membranes formed from unsaturated polyimides
The present invention is a class of polyimide membranes containing copolymerizable, surface modifiable units containing both aromatic diamines and alkenylated diamines having a vinyl or vinylaryl...
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4916206 |
Nitramine-containing homopolymers and co-polymers and a process for the preparation thereof
Energetic binders, and, more specifically, a class of nitramine-containing homopolymers and co-polymers characterized by favorable viscosity and glass transition temperature are prepared.
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4912197 |
Highly soluble clear polyimides
Highly soluble, optically transparent to clear aromatic polyimides in the visible range are disclosed. The dianhydrides from which the polyimides are prepared are...
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4910290 |
High strength copolyester
It has been determined that the mechanical and thermal properties of polyesters can be improved by incorporating hydroxyalkyl trimellitic imides therein. Such polyesters are comprised of repeat...
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4898896 |
Transparent copolyamide from oligomeric amide and cycloaliphatic diamine and process for the production thereof
A transparent polyamide containing terephthalic acid radicals or radicals of the mixture of terephthalic and isophthalic acids and a cycloaliphatic diamine radical and having the chain formations:...
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4895927 |
Water soluble, self-crosslinking, polymeric condensation product of amino (meth) acrylate and phosponic acid ester
The present invention contains a process for manufacturing a water-soluble, self-crosslinking, polymeric condensation product by reacting 1 mole di-C 1 -4 -alkylamino-C 24 alkyl(meth)acrylates...
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4889912 |
Acetylene terminated aspartimides and resins therefrom
Acetylene terminated aspartimides are prepared using two methods. In the first, an amino-substituted aromatic acetylene is reacted with an aromatic bismaleimide in a solvent of glacial acetic acid...
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4880898 |
Water-soluble polycondensates based on fatty acids, dialkanolamine and maleic anhydride, a process for their production, hydraulic compositions containing them and their use
Water-soluble polycondensates of dialkanolamides, fatty acid diethylaminopolyglycolates and fatty acid diethyl ammonium alkyl polyglycolates, which are first reacted with maleic anhydride in a...
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4876316 |
High temperature magnet wire bond coat polyamide/aldehyde/aromatic alcohol reaction product
The present invention is for a 180° C. class heat activated magnet wire bondcoat comprising the invention product of (a) ##STR1## (b) R--CHO wherein R is an aliphatic moiety (c) R'--OH wherein...
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4876328 |
Polyamide composition
Polyamide advanced composites are formed by the condensation of diacid halides (or dicarboxylic acids) and diamines in a linear or multidimensional morphology with crosslinkable end caps that...
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4868281 |
Ionic bond containing condensation polymers
A polymer has a linear recurring unit in which a first organic group (R 1 ) having at least two carbon atoms and a valence of at least three and a second organic group (R 2 ) having at least two...
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4861857 |
Thermotropic polyesterimide from N-carboxyalkylene trimellitimide having excellent processibility, a process for their production and their use for the production of moldings, filaments, fibers and films
Thermotropic polyesterimides based on N-(ω-carboxyalkylene)-trimellitic acid imides and diphenols are distinguished by superior mechanical properties while at the same time being easily processible.
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4857599 |
Modified dense star polymers
Dense star polymers on immobilized cores are very useful as ion-exchange resins and chelation resins. For example, an aminated form of chloromethylated styrene/divinyl benzene copolymer can be...
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4855365 |
Poly-β-alanine compound, a process for producing the same and a polyacetal resin composition containing a poly-β-alanine compound
There is disclosed a novel poly-β-alanine compound comprising monomeric units of the formula (CH 2 CH 2 CONH) and monomeric units of the formula ##STR1## in a specific proportion, having a high...
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4855397 |
Polyesteramide from amino alcohol with improved gas barrier properties
Polyesteramide resins useful for forming containers having improved resistance to gas permeability comprising the reaction product of (A) a dicarboxylic acid corresponding to the structure...
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4847356 |
Transparent copolyamide from bis(4-amino-3,5-diethyl cyclohexyl) methane
Transparent copolyamides with very good processibility, very good mechanical properties, excellent transparency and hydrolysis stability in boiling water, and alloyability with other polyamides,...
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4845278 |
Crosslinkable aramids
A new class of polymers and processes used in their preparation are described. These polymers are comprised of crosslinkable aramids, especially aramids that are based on synthetic aromatic amino...
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4835248 |
Biologically degradable polyamide for depot preparations having controlled release of the active compound
Polyamides in which amino acids are incorporated in the polymer backbone via two amino or carboxyl groups and which carry in the α-position to the amide structure a functional group which is...
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4816554 |
Poly(amido methyl-benzazole)
A class of polymers comprises one or more 2-amidomethylbenzazole units, ##STR1## contained within the main polymer backbone, wherein Ar is Ar 1 or Ar 2 , wherein Ar 1 is a tetravalent aromatic...
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4812362 |
Solid phase N-hydroxysuccinimide reagents
A solid phase N-hydroxysuccinimide reagent having the general formula: ##STR1## where X is particulate silica gel or controlled pore glass; n=3-7; Y is either (CH 2 ) n ' or (CH 2 ) n '...
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4751281 |
Novel polymeric compounds containing piperidine groups
Novel polymeric compounds of the repeating structural unit (I) ##STR1## in which R 1 is hydrogen, 0°, CN, cyanomethyl, C 1 -C 12 -alkyl, C 3 -C 12 -alkenyl or C 3 -C 12 -alkynyl subject to...
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4745161 |
Soluble and biodegradable polyamino acid activated for bonding of biologically active compound
The invention pertains to copolymers activated for bonding of biologically active compounds and to a method for preparation thereof. Soluble and biodegradable copolymers activated for bonding of...
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4737550 |
Bridged dense star polymers
Bridged dense star polymers having terminal group densities greater than conventional extended star polymers exhibit greater and more uniform reactivity than their corresponding conventional star...
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4725666 |
Process for the manufacture of polyamide from diamine and dinitrile utilizing (1) copper containing compound and (2) oxygen containing compound of phosphorus or sulfur as catalyst mixture
Polyamides are produced from diamines, dinitriles, and water in contact with a two-component catalyst system comprising (1) at least one copper containing compound and (2) at least one oxygen...
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4721654 |
Hollow, molecularly oriented copolyamide article
A new article of manufacture in the form of a hollow, biaxially oriented, article such as a container, formed of a composition comprising a copolyamide of hexamethylene terephthalamide and...
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4719282 |
Polycationic block copolymer
Novel polycationic block copolymers useful as antistatic agents in detergent formulations and as flocculating agents are obtained by first forming a block of units by reacting a monomer of the...
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4719281 |
Pendant quinodimethane-containing polymer
This invention provides novel polymers which are characterized by a recurring structural unit that contains a pendant quinoid structure and that exhibits nonlinear optical response. The following...
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4707538 |
Polyamide preparation with pentaamine cobalt (III) complex catalyst
A polyamide is produced by polymerizing at least one of an alpha, beta-unsaturated carboxylic acid and ammonia, an ammonium salt of an alpha, beta-unsaturated carboxylic acid, an alpha,...
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4696865 |
Hollow copolyamide article
A new article of manufacture in the form of a hollow, shaped, blow molded article formed of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide,...
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4694064 |
Rod-shaped dendrimer
Rod-shaped dendrimers having a plurality of dendritic branches emanating from an essentially linear core are prepared by first reacting a linear polyfunctional core compound such as a...
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4687838 |
Process for preparing pulverulent coating composition based upon polyamide having at least 10 aliphatically bound carbon atoms per carbonamide group
The invention concerns an improved precipitation process in the manufacture of coating powders based on polyamides having at least ten aliphatically bound carbon atoms per carbonamide group. Rapid...
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4675374 |
Solventless polymeric composition reaction product of (1) adduct of amine and acrylate with (2) polyacrylate
Solventless polymeric compositions suitable for coatings and moldings are formed by the addition reaction product of a first component comprising mono, di or polyamines, or an adduct of mono, di or...
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4673723 |
Polyamide oligomer-epoxy polymers and methods for their preparation and use
Compositions for the preparation of thermosetting or thermoplastic polymers, which compositions comprise a mixture of at least one polyepoxide and at least one polyamide oligomer, wherein the...
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4661585 |
Pulverulent polyamide coating compositions wherein the polyamide has as an average at least nine carbon atoms per carbonamide group
Pulverulent polyamide coating compositions consisting of a mixture of similar polyamides having on the average at least nine aliphatically bound carbon atoms per carbonamide group and of different...
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4629776 |
Process for the preparation of polyamide from omega-aminonitrile utilizing an oxygenated sulfur compound as catalyst
A catalytic process for the production of high molecular weight nylon-type polyamides from omega-aminonitriles has been discovered. The process comprises contacting an omega-aminonitrile, water and...
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4628077 |
Preparation of polyamide with catalyst comprising transition metal attached to a ligand which contains electron withdrawing groups
A novel transition metal complex catalyst comprised of a transition metal attached to a ligand containing electron withdrawing substituents is employed in a polymerization process for producing...
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4625002 |
Binuclear catalyst for the preparation of polyamide
A process for producing polyamides comprising contacting a polyamide forming system with a transition metal complex catalyst at a temperature sufficient to cause polymerization. The transition...
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4614615 |
Process for preparing an N-substituted carbamoyl-lactam compound
The invention relates to a process for preparing an N-substituted carbamoyl-lactam compound having the formula: ##STR1## by admixing a polyhydroxy compound having the formula R(OH) n with a...
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4609722 |
Process for preparing substantially linear polyamide from N-alkylamide-substituted amine and aqueous ammonia
N-alkylamide-substituted amines, such as nitrilotripropionamide, are either self-polymerized or copolymerized with other monomers, such as amino acids, in the presence of a stoichiometric amount of...
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4595730 |
Grafted polymer from unsaturated polyamide having single olefinic double bond
Unsaturated polyamide polymers are provided which are comprised of a polyamide chain terminated at one end by a group containing at least one double bond. The polymers are particularly useful in...
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4590260 |
Method for producing copoly(amino acid)
Copoly(amino acids) are produced by heating a mixture of at least one amino acid with at least one of ammonium malate, ammonium maleate or ammonium fumarate, or ammonium salts of malic, maleic or...
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4590251 |
Process for the preparation of polyamide from unsaturated nitrile and ammonium salt of unsaturated carboxylic acid
Polyamides can be formed in good yields by the copolymerization of at least one alpha, beta-unsaturated nitrile with at least one alpha, beta-unsaturated carboxylic acid or ammonium salt thereof....
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4588797 |
Composition comprising amide, lithium halide and organic sulfone
A process for modifying certain polyamides by use of a novel combination of an organic sulfone and a lithium halide as a processing aid to yield a modified polymer having thermal stability and a...
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