Abstract: A composite material is comprised of an in situ polymerized rigid rod polymer and an in situ polymerized matrix polymer. The composite material is isotropic and has enhanced mechanical properties as well as improved temperature resistance, improved solvent resistance and improved moisture resistance.

Abstract: Self-bonding enamel solutions containA) from 5 to 80% by weight of a copolyamide composed of units which are derived fromA.sub.1) organic dicarboxylic acids ##STR1## where R.sup.1 is an aliphatic radical of 1 to 20 carbon atoms or an aromatic radical of 5 to 25 carbon atoms,andA.sub.2) a mixture of diisocyanates, consisting ofa.sub.21) from 20 to 95 mol % of a diisocyanate of the general formulaOCN--R.sup.2 --NCOwhere R.sup.2 is an aromatic radical of 5 to 25 carbon atoms,a.sub.22) from 5 to 70 mol % of a diisocyanate of the general formulaOCN--R.sup.3 --NCOwhere R.sup.3 is ##STR2## or a linear aliphatic radical of 3 to 30 carbon atoms which is substituted by 1 to 3 C.sub.1 -C.sub.4 -alkyl groups and R.sup.4 and R.sup.5 independently of one another are each C.sub.1 -C.sub.4 -alkyl or hydrogen, anda.sub.23) from 0 to 20 mol % of a diisocyanate of the general formulaOCN--(CH.sub.2).sub.y --NCOwhere y is an integer of from 1 to 20, andB) from <0.

Abstract: A method for producing articles of composite resin, wherein a liquid crystal polymer material in powder form is mixed with a second, melt-processable polymer material; the resulting mixture is kneaded at a temperature at which the second polymer material will melt but at which no deformation of the liquid crystal polymer will be caused so as to prepare a blend comprising the liquid crystal polymer powder uniformly dispersed in the matrix of the second polymer; and the blend is then subjected to a molding or shaping process at a temperature within the range at which the liquid crystal polymer is capable of forming liquid crystals.

Abstract: A process for the continuous and discontinuous production of polycaprolactam is disclosed which includes the step of polymerizing, by anionic polymerization, .epsilon.-caprolactam to which suitable initiators and activators are added. The process may optionally include the addition of comonomers, pigments, electroconductive fillers, modifying polymers, inorganic fillers, reinforcing fibers, inorganic fillers and/or other additives to a dispersing media in which the polymerization takes place with polycaprolctam, copolymers or composites thereof being obtained in the form of particles. The foregoing additives may, for example, be added to the dispersing media dropwise with mechanical or convective stirring under controlled temperature conditions.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermoplastic polymers such as pSTATEMENT OF GOVERNMENT INTERESTThis invention was made with Government support under contract F33615-86-C-5068 awarded by the Department of the Air Force. The Government has certain rights in this invention.

Abstract: A composition of improved strength, stiffness, or toughness consisting essentially of a blend of at least two incompatible thermoplastic polymers, at least one of which has a flexural modulus of less than 150 kpsi, and at least one isocyanate reacting agent having functionality less than three. The composition, an engineering plastic that is impact resistant, is useful as, for example, a molding resin, an automobile bumper or door, or high pressure tubing.

Abstract: A solderable polyurethane wire enamel composition comprising a mixture of a blocked isocyanate and polyesterimide resin wherein the ratio of isocyanate groups in the blocked isocyanate to hydroxyl groups in the polyesterimide resin is about 0.82:1 to about 5.7:1 and the hydroxyl to carboxylic acid ratio of the raw materials used in preparing the polyesterimide is about 1.4:1 to about 2.5:1.

Abstract: Substantially fully imidized polyimidesiloxanes which are based on a selected pyridine compound are soluble in diglyme which gives them particular utility in the micro-electronics industry. The polymers are prepared from the dianhydride, a difunctional siloxane monomer and an organic diamine that has the formula ##STR1## wherein X is hydrogen, halogen, phenyl or combinations thereof,Z=--O--, --S--, ##STR2## >C(CX.sub.3).sub.2, --or --Y--Ar--Y--, Ar' is an aromatic radical of 6 to 10 carbon atoms, ##STR3## Y=--O--, --S--, ##STR4## >C(CX.sub.3).sub.2, or --. n=0 or 1.

Abstract: Molding compositions of thermoplastic plasticizer-containing polyamides exhibit greatly reduced migration of plasticizer or no migration at all due to having 0.1 to 20% by weight of sterically hindered carbodiimides of the formulaR.sub.1 --N.dbd.C.dbd.N--[R.sub.2 --N.dbd.C.dbd.N].sub.2 --R.sub.3wherein n is 0 to 100; R.sub.1 and R.sub.3 are individually a monovalent radical taken from the class consisting of aliphatic having 1 to 20 carbon atoms, cycloaliphatics having 6 to 20 carbon atoms, and aromatics having 8 to 20 carbon atoms and also having substituents; and R.sub.2 is a divalent radical taken from the class consisting of aliphatics having 1 to 20 carbon atoms, cycloaliphatic having 6 to 20 carbon atoms, and aromatics having 8 to 20 carbon atoms and also having substituents.

Abstract: Water-dilutable binders for water-dilutable lacquers, coating compositions or sealing compounds consist essentially of a mixture of 5 to 40 parts by weight of a crosslinker resin and 60 to 95 parts by weight of a copolymer containing carboxyl groups or acid anhydride groups or both and further containing hydroxyl groups, and wherein the carboxyl or acid anhydride groups have been at least partially converted into carboxylate groups to the degree necessary to provide solubility or dispersibility of the binder in water and said copolymer is obtained by copolymerizing an alpha, beta-unsaturated carboxylic acid, a hydroxyalkyl acrylate or methacrylate, an olefinic monomer, a hydroxy-free acrylate or methacrylate and, optionally other mono-or polyunsaturated monomer, and wherein at least 30% of the hydroxyl groups of the copolymer are modified by esterification with a lactone.

Abstract: Polyamide-based molding compositions having enhanced flexibility and resilience, especially at low temperatures, are prepared from (1) semirigid copolyamides prepared from fatty acid dimers, (2) elastomers containing moieties compatible or reactive with such copolyamides (1) and comprising olefinic copolymers bearing carboxyl and/or carboxylate groups, copolyester-amides, polyurethanes, organopolysiloxane and polyurethane block copolymers, and copolymers produced from a latex which comprises suitable functional groups, and, optionally, (3) conventional polyamides.

Abstract: Methods of producing thermoplastic poly(amide-urethane) block copolymers having excellent flexibility at low temperatures are provided. The methods comprise reacting substantially linear polyamides, the polyamides being based on dimerized fatty acids and terminated by carboxyl and/or amino groups and aliphatic or cyloaliphatic polyethers and/or reaction products thereof with 2,3-epoxypropanol. The reaction products contain substantially no free isocyanate groups or epoxide groups. The invention also relates to the use of these products as adhesives and corrosion inhibitors for metallic and/or wooden materials.

Abstract: Lacquer binders suitable for the production of highly heat-resistant films and coatings consisting of a mixture of(a) polyamide-imides based on trimellitic anhydride, lactams and diisocyanates,(b) organic compounds carrying (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups and optionally,(c) auxiliaries and additives.The use of these binders in coating compositions for heat-resistant substrates and a process for the production of wire enamels using said coating compositions.

Abstract: The invention relates to trans-cyclohexane-1,4-diisocyanate which is completely or partially blocked with epsilon-caprolactam and a method of manufacturing the same wherein 1 mole trans-cyclohexane-1,4-diisocyanate is reacted with 1 to 2 moles epsilon-coprolactam, without or with the presence of solvents. These blocked diisocyanates are used for polyurethane powders.

Abstract: Synthetic material apt to stably adsorb high quantities of heparin, consisting of a polyurethane resin, cross-linked with copolymeric chains in correspondence of at least part of its own urethane groups ##STR1## as per the following general formula: ##STR2## wherein, PU--- is a polyurethanic polymeric chain,R.sup.1 is an alkyl or aralkyl, containing functional groups inert to isocyanates,R.sup.2 is an alkylene,R.sup.3 is an alkylene, arylene or other bivalent organic radical, andR.sup.n is a polyamidoaminic radical;and process for the production of said material.

Abstract: PUR powder paints with matt surfaces that level well after baking are obtained when polymers containing hydroxyl groups with more than 2 OH groups in the molecule are reacted with blocked polyisocyanate-urea adducts of polyisocyanates and polyamines with an NCO content of 8 to 15 wt. % and a free NCO content of up to 4 wt. %.

Abstract: The reaction of--preferably partially crystalline--polyamides with monoisocyanate or monoisocyanate precursors gives products having improved flowability, mould release and/or notched impact strength.

Abstract: Self-crosslinking cationic paint binders in which the crosslinking is effected through the reaction of methane-carboxylic acid dialkylester monoamide structures with free hydroxyl or amino groups on the resin are described. The crosslinking functionality is provided by reaction of a polyisocyanate with a corresponding quantity of a CH-active alkyl ester. The alkyl ester is preferably a malonic acid dimethylester or malonic acid diethylester.

Abstract: Flame retardant compositions comprise linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a minor quantity, relative to the polymer of an alkaline earth metal hydroxide.

Abstract: A polymer admixture is formed from a base polymer and thermoplastic copolymer additive including polar hard segments and polar and nonpolar soft blocks in graft or block copolymer form. The polymer admixture is characterized by increased contact angle hysteresis and is formed into blood and tissue-contacting surfaces of a biomedical device or into textiles. A preferred additive comprises a segmented block copolymer having polydialkylsiloxanes as nonpolar soft blocks, and a polyurethane as hard segments and a polyalkylene oxide as a polar soft block.

Abstract: A novel thermoplastic composition is prepared by intimately mixing a polyurethane component with a selected reinforcing amount of a rod-like aromatic polyamide component. The composition exhibits unexpected tensile and modulus properties.

Abstract: Substantially fully imidized polyimidesiloxanes which are based on 6FDA and optionally also a mixture of a biphenyl tetracarboxylic dianhydride and a benzophenone tetracarboxylic dianhydride, are soluble in diglyme which gives them particular utility in the micro-electronics industry. The polymers are prepared from the mixture of dianhydrides, a difunctional siloxane monomer and an organic diamine. Diamines can be used to provide an asymmetrical structure in the polyimidesiloxane polymer chain. The polyimidesiloxane can be prepared with functional groups which render them directly curable. The polyimidesiloxanes can also be prepared with functional groups which when reacted with an unsaturated compound renders the polymers curable. The product of the invention can be used in the form of solutions in the micro-electronic industry. The polymers can also be used in wire and cable coating and to prepare films, fibers, and molded and extruded articles.

Abstract: The present invention relates to a process for the production of stable dispersions of polyureas and/or polyhydrazodicarbonamides in a hydroxyl-group-containing material by reacting an organic di- or polyisocyanate with a composition selected from the group consisting of polyamines containing primary and/or secondary amine groups, hydrazines, hydrazides, and mixtures thereof, in said hydroxyl-group containing material, in the presence of a dispersion stabilizing compound.

Abstract: Compositions useful as printing inks or as dry or wet concentrates for the preparation of inks, comprising substantially homogenous blends of from about 0.1 to about 50.0 wt. % water dispersible polyurethane, and conversely from about 99.9 to about 50.0 wt. % water dispersible polyester, and preferably containing from about 1.0 to about 95.0 wt. % of a solvent system comprising water or water admixed with cosolvent, the cosolvent comprising up to about 30.0 wt. % of the solvent system. These blends show exceptionally marked improvements in certain physical properties such as: stability of viscosity to ambient and process conditions; linearity of viscosity change with water dilution; consistency of viscosity for a great variety of pigments; and greatly improved shelf-life (no significant polymer segregation of layering). Such properties greatly enhance the utility of these blends for use in pigmented or dyed printing inks and in other substrate coating formulations which may or may not contain colorants.

Abstract: Blends of polyamide polyols and urethane diols are prepared by reacting alkyl (methyl) esters of polybasic acids (preferably dibasic acids) with excess alkanolamine (preferable ethanol amine propanol amine) to form the polyamide polyol of the polybasic acid and alkyl alcohol. The alkyl alcohol is removed and the excess ethanolamine is reacted with ethylene or propylene carbonate to form the urethane diol. This blend of urethane diol and polyamide polyol is useful in various polymer formulations.

Abstract: A sonic window suitable for use in sonar applications wherein an elastomer such as natural or synthetic natural rubbers, a low air entrapping fiber or fibril used for reinforcement, fillers, and thermosetting resins are formed into desired window configuration. The low air entrapment associated with the fiber or fibrils produces a remarkably sonicly transparent window.

Abstract: This invention relates to the use of mixtures of aliphatic-aromatic polyamidimides and polyamides.

Abstract: A compatibilizing agent for polymeric blends of polycarbonates and polyamides which have improved physical and chemical resistance properties, without any substantial sacrifice of the desirable properties of the polycarbonate or polyamide.

Abstract: Disclosed are novel blends comprising segmented polyesteramides with minor amounts of carbodiimide containing materials.The blends are characterized by excellent physical properties and improved compression set characteristics over the polyesteramides in the absence of the carbodiimide component. This allows the polymers obtained to find utility in the making of seals or gaskets which heretofore the base polyesteramides could not satisfy.

Abstract: A solution of a non-reactive polymer in a liquid oxazoline which may include a reactive additive such as a polyisocyanate to provide solid polymers by interpolymerization of the oxazoline and reactive additive are described.

Abstract: Heat-curable hot-melt enamels, a process for their preparation, and the production of highly heat-resistant wire windings. These heat-curable hot-melt enamels are solutions of a nylon in organic solvents, which contain, as the nylon, a nylon possessing functional amino groups and additionally contain a blocked di- or polyisocyanate. They are useful for the production of highly heat-resistant wire windings.

Abstract: 4,4'-(Hexafluoroisopropylidene) bisphonol dicyanate and related compounds have reduced dielectric constant, reduced moisture absorption, and increase Tg making such compounds especially suitable for various electronic applications, such as circuit packaging or in forming prepregs and circuit boards.

Abstract: Novel s-triazine compounds containing at least one N,N-bis(alkoxy or hydroxyalkoxy-carbonyl-amino C.sub.2 -C.sub.10 alkyl) amino substituent function in self-condensation and as crosslinkers for compounds containing active hydrogen groups. The compositions cure to coatings with excellent properties, especially corrosion resistance, humidity resistance, abrasion resistance and flexibility. The coatings have excellent exterior durability.

Abstract: The present invention provides a molded product composed of a polymer alloy of a polyamide polymer and at least one polyurethane polymer, polyurea polymer, and/or polyisocyanurate polymer. The polymer alloy is an interpenetrated network of different polymers, a semi-interpenetrating network of different polymers, or a polyblend of different polymers.Reactant streams containing the compounds for forming the polymers of the polymer alloy are admixed to form a reaction mixture. The liquid reaction mixture is preferably a substantially homogeneous mixture of the reactant compounds. Each reactant stream thus contains only a portion of the components required to obtain the polymer alloy product. The resulting mixture is then rapidly introduced into a mold wherein chemical reaction takes place and the polymer alloy forms. Preferably, the mold is heated. The solid polymer alloy product is then recovered from the mold.

Abstract: Compositions comprising elastomeric polyurethane prepolymers comprising the reaction product of at least one diisocyanate selected from the group consisting of p-phenylene diisocyanate, m-phenylene diisocyanate, 1,4-cyclohexyl diisocyanate, tetramethylxylyl diisocyanate and dimethylphenyl diisocyanate and at least one polyol or polythiol characterized by the presence of two hydroxyl or thiol groups or one hydroxy and one thiol group; a monomeric diol or dithiol curing agent and vein forcing fiber are especially useful for preparing fiber-reinforced composite structures, especially for dynamic applications.

Abstract: A method for the preparation of block polyurethane amides in a melt by the reaction of(a) a linear polyamide having terminal carboxylic acid ester groups and which melts at not more than 210.degree. C.; and(b) a polyurethane having hydroxyl groups at its chain ends;at a temperature of 160.degree. C. to 240.degree. C., and in the presence of a trans-esterification accelerator.

Abstract: Carboxy-terminated prepolymers are prepared by the reaction of a diamine, preferably an aromatic diamine, or a mixture thereof with a triamine, with a carboxy anhydride such as trimellitic anhydride and a dianhydride such as bisphenol A dianhydride. The prepolymers, or functional derivatives thereof, are then reacted with a diisocyanate or diamine, or a mixture thereof with a triisocyanate or triamine, preferably an aromatic diisocyanate, to produce copolyamideimides. The products prepared using triamines or triisocyanates are crosslinked. Other products containing alkyl or alicyclic groups attached to aromatic radicals can be oxidatively crosslinked, e.g., by heating in air.

Abstract: Disclosed is a magnet wire composition comprising the reaction product of a polyamide resin, a titanate catalyst, and a solvolytic agent admixed with a blocked polyisocyanate and hydroxylated polyester. Also disclosed is a method of applying such a magnet wire enamel to a magnet wire substrate and additionally disclosed is a method for making such magnet wire enamel.

Abstract: A resinous composition is composed of the ungelled reaction product of(i) a diester of oxalic acid;(ii) a material containing one or more primary and/or secondary amino groups and one or more additional functional groups; and(iii) a material capable of coreacting with (i) or (ii).The resinous composition is useful in formulating intumescent fire protective compositions for fire protection of substrates.

Abstract: A heat curable one package polyurethane resin composition adaptable to use for automotive seam sealing, particularly under high solids acrylic enamel paints, said composition comprising an isocyanate terminated polyurethane prepolymer having pendant epoxy groups along the polymer chain and the isocyanate groups of which are blocked by reaction with an oxime, and a curing agent having at least two active hydrogen atoms per molecule, such as a polyol, a polyamine, or a blocked polyamine.

Abstract: Novel alkylcarbamylmethyl aminotriazines self-cure and also function as crosslinkers for compounds containing active hydrogen groups. When the active hydrogen-containing compounds are hydroxylated polymers, coatings are provided with exceptional resistance to detergent and salt-spray exposure and improved abrasion resistance. The novel aminotriazines also can be combined with fillers as binders which when cured provide shaped articles of manufacture, such as insulation and foundry core molds.

Abstract: Novel beta-hydroxyalkylcarbamylmethyl aminotriazines function in self-condensation and as crosslinkers for amino resins and also compounds containing active hydrogen groups. The compositions cure to coatings with excellent properties, and they can be used as binders for fillers such as insulating glass and foundry sand.

Abstract: A polymer admixture is formed from a base polymer and thermoplastic copolymer additive including polar hard segments and polar and nonpolar soft blocks in graft or block copolymer form. The polymer admixture is characterized by increased contact angle hysteresis and is formed into blood and tissue-contacting surfaces of a biomedical device or into textiles. A preferred additive comprises a segmented block copolymer having polydialkylsiloxanes as nonpolar soft blocks, and a polyurethane as hard segments and a polyalkylene oxide as a polar soft block.

Abstract: A urethane modified resin is prepared by reacting a resin containing carboxyl groups with an amine-alcohol to form a resin-amine salt, followed by reacting the resin-amine salt with a polyisocyanate.

Abstract: Composite polyisocyanate addition products are formed from (1) the reaction product of a compound having at least two isocyanate-reactive hydrogen atoms and a molecular weight of from 400 to 10,000, a polyisocyanate and a catalyst which is a diffusion stable amino alkyl urea having tertiary amino groups and corresponds to the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and n each represent specified groups or values and (2) another different material such as polyvinyl chloride, ABS, lacquers and textiles. Known additives such as blowing agents, chain extenders and foam stabilizers may optionally be used in the production of reaction product (1).

Abstract: A heat curable one package polyurethane resin composition adaptable to use for automotive seam sealing, particularly under high solids acrylic enamel paints, said composition comprising an isocyanate terminated polyurethane prepolymer the isocyanate groups of which are blocked by reaction with an oxime, and a curing agent having at least two active hydrogen atoms per molecule, such as a polyol, a polyamine, or a blocked polyamine.

Abstract: This invention relates to a new process for the production of polyamide imides.

Abstract: The wear resistance and other properties of a lacquer are improved by incorporation therein of particles of a high molecular, inert, wear-resistant plastics material having a diameter of 2 to 200 microns. Such a lacquer is particularly useful for application to metals and may be stored after application.

Abstract: A heat resistant resin composition comprising (A) a polyamideimide resin soluble in a cresol type solvent obtained by using a lactam as a reactant, and (B) at least one member selected from the group consisting of a polyester resin, a polyesteramide resin, a polyesterimide resin and a polyesteramideimide resin, preferably heated for conducting a reaction, gives coatings excellent in heat resistance, thermal shock resistance, wear resistance, resistance to hydrolysis, crazing resistance, etc., suitable for enamelled wire.

Abstract: Easy-flowing impact resistant polyamides are obtained by incorporating (poly)oxycarbonylisocyanates into the polyamides.