Abstract: An epoxy resin composition is disclosed, which comprises the following elements:(A) a bifunctional epoxy resin;(B) a trifunctional epoxy resin;(C) a phenolic compound represented by the following general formula: ##STR1## wherein X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5, X.sub.6, X.sub.7, X.sub.8, X.sub.9, X.sub.10, X.sub.11, X.sub.12, R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom or a methyl group; and(D) 4,4'-diaminodiphenyl sulfone or 3,3'-diaminodiphenyl sulfone, wherein the molar ratio of epoxy groups in element (A) to those in element (B) is in the range of from 1/4.0 to 1/0.1, element (C) is used in an amount that satisfies the condition:1/0.9.ltoreq.(A+B)/C.ltoreq.1/0.1and element (D) is used in an amount that satisfies the condition:1/1.3.ltoreq.(A+B-C)/D.ltoreq.1/0.

Abstract: Heat curable epoxy resin systems are disclosed which may be cured to form monophasic matrix resins and adhesives which, when utilized as matrix resins in carbon fiber reinforced composites, are capable of forming quasiisotropic panels having CAI values greater than 275 MPa after an impact of 6.68 kJ/m, and which maintain their tack after extended storage at room temperature.

Abstract: A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from the class consisting of aziridine group, oxazoline group. N-hydroxyalkylamide group, epoxy group, and thioepoxy group to react with carbon balck. The polymer can be used as a toner for electrostatically charged image, resin composition, coating composition, ink for thermographic transer, coating gent for magnetic recording medium, rubber composition, and carbon black dispersion and the like.

Abstract: Fiber-reinforced compositions comprising a structural fiber and a cyanate ester resin formulation having an N-substituted urea compound as a latent cure accelerator provide rapid-curing prepreg with good out-time characteristics. The prepreg may be used to form composite articles with good toughness and excellent retention of properties on extended exposure to moisture at elevated temperatures.

Abstract: Thermoplastic molding materials contain, as essential components,(A) from 2 to 97.9% by weight of a nylon,(B) from 2 to 97.9% by weight of a polyaryl ether ketone and(C) from 0.1 to 30% by weight of a polymeric component containing hydroxyl groupsand in addition(D) from 0 to 50% by weight of an impact-modifying rubber and(E) from 0 to 60% by weight of fibrous and/or particulate fillers.

Abstract: A curable resin composition comprises an epoxy compound and a propargyl aromatic ether.

Abstract: A cross-linked resin produced by heating a mixture of (a) a bis(2-oxazoline) compound, (b) an aromatic polyamine compound which has at least two amino groups in the molecule and (c) a polyepoxy compound which has at least two epoxy groups in the molecule at elevated temperatures, preferably in the presence of an oxazoline ring-opening polymerization catalyst. The resin shows a high mechanical strength and toughness, a very small water absorption and a very high resistance to heat.

Abstract: The invention relates to cathodically depositable aqueous electropaints which contain cationic amine-modified epoxy resins and are pigmented with electroconductive carbon black and which, on deposition and crosslinking, provide electrophoretically overcoatable coatings and contain as electroconductive carbon black a carbon black having an iodine absorption of 870-930 mg/g, a specific surface area (BET/N.sub.2) of 850-1,000 m.sup.2 /g, a pore volume (DBP) of 330-390 ml/100 g and an average particle size of 25-35 nm in an amount of 1.5 to 5.1% by weight - based on total solids.

Abstract: A fiber reinforced composite structure having a glass transition temperature greater than 150.degree. C. is comprised of:a) reinforcing fiber andb) a curable epoxy resin composition comprising(i) one or more epoxides having more than one epoxide group per molecule, of which epoxides at least 10 percent by weight is a 9,9-bis[4-(2,3-epoxypropoxy)phenyl]fluorene, all of the fluorene epoxy present being free of ortho substitution;(ii) an effective amount of one or more epoxy curing agents.

Abstract: A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from the class consisting of aziridine group, oxazoline group. N-hydroxyalkylamide group, epoxy group, and thioepoxy group to react with carbon black. The polymer can be used as a toner for electrostatically charged image, resin composition, coating composition, ink for thermographic transer, coating gent for magnetic recording medium, rubber composition, and carbon black dispersion and the like.

Abstract: A paint composition for cation electrodeposition painting, used for painting automotive vehicle body etc. The paint composition comprises basic unsaturated modified epoxy ester expressed by the general formula: ##STR1## where R.sub.1 and R.sub.2 are functional groups at least one of which is .alpha., .beta.-ethylenic double bond containing groups and the remainder is an unsaturated fatty acid chain; R.sub.3 is a group expressed by the formula: ##STR2## and X and Y are functional groups whose total number is n+1 in which not less than one functional group is a group containing both a tertiary amine function and a urethane function, and the remainder are hydroxyl groups (--OH), n being an integer ranging from 1 to 20.

Abstract: Resistance paste comprises conductive powder suspended in a binder resin, and is characterized in that the conductive powder comprises graphite powder of which particles are coated or covered with at least one higher fatty acid having at least 12 carbon atoms. The paste may contain carbon black as a part of the conductive powder. The paste may further contain a filler, preferably, fine powder of talc having a mean particle diameter of not more than 5 .mu.m.

Abstract: An electrically conductive adhesive composition comprises an epoxy resin and stainless steel fibers, or other conductive fibers, having a length of about 4 mm to about 8 mm at a concentration of less 5% by weight. It is preferred that the stainless steel fibers have a length of about 6 mm and a diameter of about 2 .mu.m to about 20 .mu.m, and are present in a concentration of from about 0.7% by weight to about 1.5% by weight. The primary purpose of the adhesive is to continue conductivity across bonds in systems designed to prevent build-up and storage of static electrical charges.

Abstract: Damage tolerant composites comprising high strength filaments in the form of bundles or tows of continuous fiber and a tough phase separated, crosslinked epoxy resin matrix are disclosed. The crosslinked epoxy resin matrix comprises infusible particles made from a rubber polymer that reside primarily between plies of the composite and critically have a median particle size between 10-75 microns. Prepregs for making the damage tolerant composites and methods of making such prepregs and the epoxy resin compositions thereof are also disclosed. The epoxy resin compositions comprise the infusible particles which become segregated as to size on a surface layer of the prepreg during the process of combining the high strength filaments of the prepreg and the resin containing the epoxy resin composition.

Abstract: The present invention relates to a new thermoplastic polymer composition having the processing characteristics of a thermosetting polymer along with an improved balance of properties including improved modulus/glass transition temperature/toughness balance. These new polymer compositions are prepared by reacting certain amine compounds with certain diepoxide compounds to form linear units which are lightly crosslinked. Also disclosed and claimed are processes for preparing such compositions, cured compositions and end-use applications.

Abstract: A friction material containing from about 0.5-29 wt % of carbonaceous fibers with a bond nitrogen content of from about 14 to 21 wt %, an auxiliary material and a thermosetting resin. The material has good wear and temperature resistance characteristics and can be used in power transmissions and brakes.

Abstract: A composite tooling part having excellent dimensional stability, which may be prepared at low cost employs a one-component epoxy resin system having a catalyst which is the reaction product of an aromatic dicyanate and an imidazole. Reinforcing materials are incorporated in the matrix, and the resulting prepreg is allowed to cure at low temperature, down to about room temperature, until the free standing state is obtained. Thereafter, if elevated temperature performance is necessary, the product can be post-cured at elevated temperatures, without the need for a high temperature master.

Abstract: An epoxy resin composition comprising (A) an epoxy resin having three or more epoxy groups per a molecule and (B) a reactive oligomer having in its molecule an aromatic residue connected thereto by --O-- or --S-- linkage and having at the terminal of the molecule a phonolic hydroxyl group.

Abstract: A composition is provided comprising an epoxy resin and an aromatic amine curing agent, the latter which can be described by the formula ##STR1## in which each R is selected C.sub.2 -C.sub.7 alkyl and each R' is selected from C.sub.1 -C.sub.7 alkyl. The described composition has good physical properties for high-performance composite applications and has a relatively long working life.

Abstract: A curable composition for a fiber-reinforced resin, comprises (A) 60-90 weight % of an epoxy-containing (meth)acrylate resin which contains an epoxy group and an unsaturated-monobasic acid ester group in its molecules and which is formed by the reaction of an epoxy resin containing at least two epoxy groups per molecule and having an epoxy equivalent of 100-1000 with an unsaturated-monobasic acid in an amount such that there are 0.2-0.7 equivalents of carboxyl groups per 1 equivalent of epoxy groups, (B) 40-10 weight % of a radical polymerizable monomer, (C) an organic peroxide, (D) a curing agent for the epoxy resin, and (E) one or more reinforcing materials selected from continuous fiber and fiber cloth.

Abstract: Described are novel thermosetting epoxy resin compositions suitable for making cured resins, prepregs and stiff, tough thermoset composites. The thermosetting compositions comprise a polyepoxide component, an amine hardner and a specified amount of certain aromatic oligomers containing functional groups which are reactive with the polyepoxide and/or hardener under curing conditions for the composition. The cured resins have a multiphase morphology which comprises at least one glassy continuous phase and at least one glassy discontinuous phase and have a fracture toughness, K.sub.IC, of at least 1.0 MPam.sup.1/2.

Abstract: Improved compositions are disclosed which are useful in providing a conductive layer of coating on a surface to provide protection against harmful electrostatic discharges. Also disclosed are compositions useful in absorbing and dissipating mechanical and electromagnetic energy and preventing electrostatic build-up; these compositions also provide electromagnetic compatability. The compositions contain elemental carbon and a polymeric matrix or binder. The improvement comprises employing a unique ground calcined, coal-based coke which approaches graphite in terms of its performance as a conductive additive or pigment but which does not possess the disadvantages associated with the use of graphite.The unique coke employed in the compositions and methods of the present invention has a level of graphitic structure which approaches that of a true graphite. This level of graphitization can be most easily recognized by utilizing x-ray powder diffraction. More specifically, when the value of E.sub.

Abstract: Disclosed are improved compositions useful in providing a conductive layer or coating on or within a conductor. The compositions contain elemental carbon and a polymeric matrix or binder. The improvement comprises employing a unique ground calcined, coal-based coke which approaches graphite in terms of its performance as a conductive additive or pigment but does not possess the disadvantages associated with the use of graphite.The unique coke employed in the compositions and methods of the present invention has a significant level of graphitic structure. This level of graphitization can be most easily recognized by utilizing x-ray powder diffraction. More specifically, when the value of E.sub.c or the inverse peak width (using the 002 peak) is measured for this material using Mo K.alpha. radiation (.lambda.=0.71 .ANG.), the value is in the range of about 27 to about 80, and preferably about 28 to about 75.

Abstract: Novel 3-ring tetraglycidates having the formula ##STR1## wherein ##STR2## Y=halogen, C.sub.1 -C.sub.4 alkyl; and n=0 to 4, are disclosed.Epoxy resin systems exhibiting good tensile properties and moisture sensitivity can be made by copolymerizing the tetraglycidates with a polyamine curing agent. Prepregs can be made by combining the epoxy resin systems with a fiber reinforcement. The epoxy resin system may include a co-epoxide.

Abstract: A polymer composition has a filler of particulate conductive material including at least 0.5% by weight of char carbon produced by carbonization of plant material, particularly herbaceous straw. The filler may also contain other conductive materials such as carbon black. Compositions with electrical resistivities over a wide range may be produced, preferably with polymers adapted for use as coatings. In particular compositions with surface resistivities between 10.sup.6 and 10.sup.9 ohms per square are available and find use as antistatic coatings, avoiding the excessively rapid discharge of static electricity that occurs with fillers of carbon black alone.

Abstract: The present invention relates to a new thermoplastic polymer composition having the processing characteristics of a thermosetting polymer along with an improved balance of properties including solvent resistance and improved modulus/glass transition temperature/toughness balance. These new polymer compositions are prepared by reacting certain diphenolic compounds with certain diepoxide compounds to form linear units which are lightly crosslinked through the resulting secondary hydroxyl groups. Also disclosed and claimed are processes for preparing such compositions, cured compositions and end-use applications.

Abstract: The present invention relates to a new polymer composition having the processing characteristics of a thermosetting polymer along with an improved balance of properties including improved modulus/glass transition temperature/toughness balance. These new polymer compositions are prepared by reacting certain diphenolic compounds with certain diepoxide compounds to form linear units which are lightly crosslinked through the resulting secondary hydroxyl groups. Also disclosed and claimed are processes for preparing such compositions, cured compositions and end-use applications.

Abstract: Unfavorable interaction is prevented between (a) electroconductive particle fillers and (b) organic resin binders of the type which are normally instable with respect to viscosity when aged in contact with said fillers. Moreover, electroconductivity degradation is also avoided. In a preferred mode of the invention, the particle surface is treated with a coating of an interfacial pacifying agent such as a tetravalent tin compound which both enhances the electroconductive performance of the particles and also is sufficiently compatible with the resin binder to migrate into the binder sufficiently to avoid undue gelling of the binder by particle-borne contamination or residues of such contamination.

Abstract: A resin composition is suitable for molding to a gear and comprises 30 to 98 percent by weight of a resin being capable of the anisotropic phase in the molten state and the melt processing and 2 to 70 percent by weight of fibers such as metal fibers, carbon fibers, glass fibers, inorganic fibers, synthetic fibers and mineral fibers.

Abstract: Viscous oligomeric epoxy resins can be quickly cured at temperatures of 100.degree. C. by incorporating a hardener that is a blend of (a) the oligomeric reaction product of bisphenol A and bisphenol A monoglycidyl ether and (b) an imidazole. The cured resins are tough and resistant to both moisture and high temperatures. Prepregs, in which glass, graphite or polymeric organic fiber sheets are saturated with these resins, are particularly useful in the repair of damaged aircraft and aerospace structures.

Abstract: Epoxy resin composition comprising a uniform mixture of an epoxy resin and fine particles of a rubber adhered uniformly on the surface thereof with fine particles of an inorganic material, said composition having improved peel strength and toughness when cured and being useful as an adhesive or a molding material.

Abstract: An intermediate for a composite material is disclosed. The intermediate is obtained by impregnating an epoxy resin composition containing a specific additive into a carbon fiber. The composite material obtained from the intermediate has improved mechanical properties.

Abstract: Methods and compositions for reducing organic color contamination in influent water are disclosed. The methods comprise adding to the influent water powdered activated carbon and a water soluble or water dispersible cationic polymer. The polymers are chosen from: (a) polyquaternary ammonium polymers formed from reaction of a secondary amine with an epichlorohydrin or epoxide (b) cross-linked polyquaternary ammonium polymers formed from reaction of a secondary amine, epichlorohydrin or epoxide, and a third reactant selected from the group consisting of ammonia, primary amines, alkylenediamines and polyamines and (c) substantially linear high molecular weight polyquaternary ammonium polymers of the type disclosed in U.S. Pat. No. 3,288,770, such as polydiallyldimethyl ammonium chloride. Compositions comprise a slurry comprising powdered activated carbon and at least one polymer chosen from the (a) (b) and (c) groupings and mixtures thereof.

Abstract: An adhesive composition which is curable by electromagnetic induction heating when it is applied to various substrates, said adhesive comprising a mixture of(I) An epoxy resin component and(II) A hardener component and(III) From 2 to 60% by weight of (I) and (II) of an electromagnetic energy absorbing material is described.

Abstract: Described herein is a composition which contains a specific group of hardeners, an epoxy resin and a thermoplastic polymer. When combined with a structural fiber the composition produces composites which have improved impact resistance, improved tensile properties and high compressive properties.

Abstract: Compounds of formula I ##STR1## wherein R.sub.1 is hydroxyl or glycidyloxy, R.sub.2 is hydrogen, alkyl, alkoxy, halogen, aryl, aralkyl or alkaryl, R.sub.3 is hydrogen or alkyl or both R.sub.3 s together are alkylene, and q is 1 to 3.5, together with epoxy resins and thermoactivatable hardeners and/or curing catalysts, are suitable for the preparation of curable mixtures. The cured products obtained therefrom can be employed for the preparation of electrically conductive coatings or patterns by tempering at elevated temperature or by irradiation with actinic light. Metal can be deposited without current on said electrically conductive coatings or patterns.

Abstract: Phenol-aldehyde novolac resins having reduced quantities of 2-functional material are prepared by removing all or part of the 2-functional material from this product resulting from reacting phenol with an aldehyde. Epoxy novolac resins prepared from the novolac resin containing less 2-functional product exhibit increased Tg values when cured.

Abstract: The 2-functional component of substituted phenol-aldehyde novolac resins is reduced. Epoxy novolac resins prepared from the novolac resin containing reduced quantities of 2-functional product exhibit increased Tg values when cured.

Abstract: A diaphragm for an electroacoustic transducer comprising stratiform mineral of layers into which a hardener or an agent for facilitating hardening is adsorbed between the layers, thermosetting resin monomer, and carbonfibers which constitute a composite material which is formed under heat and pressure. The diaphragm is increased in rigidity which is required as physical properties therefor and is easy in forming.

Abstract: New and improved heat curable compositions are disclosed comprising epoxidic prepolymers and mono- and di-imidazole-carboxamides. The compositions are stable at room temperature, but cure readily at moderate temperatures of substantially less than about 250.degree. F., preferably at about 180.degree. F. to about 200.degree. F. and especially preferably at about 160.degree. F. to about 180.degree. F. The cured neat resins are useful as adhesives and as matrix resins in reinforced composites, with excellent physical properties.

Abstract: A resin composition for a molding material is provided which comprises a resol-type phenolic resin, an epoxy resin and an amine compound having hydrogen atoms directly bonded to the nitrogen atom. The amine compound is contained in such a proportion that the amount of its hydrogen atoms directly bonded to the nitrogen atom is 0.5 to 2.0 equivalents per equivalent of the epoxy groups of the epoxy resin.

Abstract: Heat curable compositions of reinforcing fibers (filaments), a thermosetting prepolymer or prepolymers and an effective amount of a curing agent or agents in which the fibers have been precoated with a fiber- and matrix resin-reactive elastomer are described. The compositions are useful to form composites of high fracture toughness and compressive strength which, in turn, can be formed into structural members such as aircraft parts. Processes for applying an elastomer coating to fiber tapes, fabrics and rovings are also described.

Abstract: A polyolefin resin composition comprising a polyolefin modified with an unsaturated carboxylic acid, at least one member selected from the group consisting of polyepoxides, polyisocyanates, and polyamines, and a reinforcement.

Abstract: A substrate for magnetic discs, which are to be used as external storage in data processors, is formed from glass-like carbon materials by themselves or contained in a thermosetting resin matrix. The glass-like carbon materials have excellent thermal resistance, can be finished to a mirror-like surface, and have less surface defects than aluminum substrates. Magnetic materials can be adhered directly onto the surface of such substrates shaped in the form of a disc. The resulting disc has good hardness, is resistant to elevated temperatures, is less likely to deform, and is low in cost.

Abstract: Conductive coating (20) is a thorough mixture of 0.03 parts per weight of carbon black together with 0.003 to 0.01 parts per weight of wetting agent and 20 parts of solvent, and further mixing in by low shearing mixing 1/2 to 1 part per weight of thermosetting resin. This is then sprayed into place on the substrate and thermoset. In this particular case, the substrate is exterior face sheet (12) of honeycomb structure (10) which may serve as part of a spacecraft, to electrically conduct away surface charges.

Abstract: Curable thermosetting resin compositions comprising at least one cycloaliphatic epoxy resin having at least two 1,2-epoxy groups per molecule, and certain aromatic diamines having three aromatic rings in the molecule are disclosed. Resin compositions comprised of, for example, bis(2,3-epoxycyclopentyl)ether and 1,3-bis(4-aminophenoxy)benzene exhibit a highly desirable balance of physical and chemical properties which renders such compositions ideally suited for use in the fabrication of wet winding composites. The resin compositions prepared in accordance with the invention have unexpectedly low viscosity, high glass transition temperatures, high tensile properties and unexpectedly low water uptake. Accordingly, the resin compositions find particular application in the preparation of composites by wet winding procedures.

Abstract: Epoxy resin compositions which on curing yield cured resins having a high glass transition temperature, high ductility, and low moisture pick-up are disclosed. To obtain such cured resins, 9,9-bis(aminophenyl)fluorenes are used as curing agents.

Abstract: Disclosed are multiphase epoxy thermosets having improved toughness and peel strength levels. The epoxy thermoset resin can serve as a matrix resin for composite structures and as a high temperature adhesive in bonding bodies together. The matrix comprises a crosslinked continuous phase and crosslinked discontinuous phase which contains the rubber phase.

Abstract: Disclosed is a stiff, tough thermoset composite, the composite comprising a crosslinked epoxy resin matrix and high strength filaments. The resin matrix comprises a glassy discontinuous phase dispersed in a glassy continuous phase that continues throughout the resin matrix. Volume fractions of the discontinuous phase are at least about 35% of the total volume of the continuous and discontinuous phases combined in exceptionally tough composites.Also disclosed are novel resin compositions suitable for making these thermosets.

Abstract: A solvent-free curable composition has a long shelf life and consists ofA 100 parts by weight of an epoxy resin andB from 10 to 100 parts by weight of .[.,.]. .Iadd.4,4-bis-(para-aminobenzoyl)-piperazine .Iaddend.as a curing agent for the epoxy resin, .[.an aromatic diamine containing ##STR1## groups,.]. with or without C from 0.01 to 5 parts by weight of an accelerator, the curing agent for the epoxy resin being finely dispersed in the latter and preferably having a particle size of less than 10 .mu.m. .[.The preferred epoxy resin curing agent is 4,4'-diaminodiphenyl ketone..]. The curable composition is used in particular for the preparation of fiber-reinforced materials.