Abstract: A process for the production of novel polymers by the interpolymerization of a bicyclic amide acetal, a dicarboxylic acid anhydride and a polyepoxide at a temperature in the range of from 80.degree. C. to about 200.degree. C. and at a pressure in the range of from about ambient to about 50 atmospheres is described.

Abstract: There are described novel imidazolides (N-acylimidazoles) of the formula I ##STR1## wherein R.sub.1 is methyl, ethyl or isopropyl,R.sub.2, R.sub.3 and R.sub.4 independently of one another are each hydrogen, methyl, ethyl or isopropyl, with the proviso that R.sub.2 is hydrogen only when R.sub.1 is isopropyl,R.sub.5, R.sub.6 and R.sub.7 independently of one another are each hydrogen, methyl, ethyl or isopropyl, or phenyl which is unsubstituted or substituted by methyl or ethyl groups, with the proviso that at least one of the symbols R.sub.5, R.sub.6 and R.sub.7 is phenyl which is unsubstituted or substituted according to definition.The imidazolides (I) are suitable as curing agents for polyepoxide compounds.

Abstract: The reaction product of imidazole and/or its alkyl derivatives and an aldehyde is described. Epoxy resins containing the product are useful in applications such as decorative coatings, encapsulations, adhesives, laminates, potting compounds, etc.

Abstract: Heat-curable mixtures, containing (a) an epoxide resin having on average more than one epoxide group in the molecule, (b) an allyl-substituted or methallyl-substituted imide of the formula I ##STR1## in which E is allyl or methallyl, G is hydrogen or methyl, n is 1 or 2, and R is hydrogen, alkyl, alkenyl, cycloalkyl, aryl, benzyl or arylene, and (c) a curing catalyst, have good storage stability and processability and produce moulded materials having high mechanical strength values and good resistance to heat.

Abstract: A curable composition consisting ofA. 100 parts by weight of an epoxy resin,B. from 4 to 100 parts by weight of a conventional curing agent for epoxy resins, andC. from 0.1 to 5 parts by weight of an N-acylimidazole which possesses an aromatic acyl component which is substituted at the two positions ortho to the carbonyl groupcan be used to produce moldings, coatings, finishes, adhesives and composite fiber materials.

Abstract: Compositions comprising a material containing (a) alkenyl phenyl cyanate groups, (b) a material containing epoxide groups and optionally any one or more of (c) an aromatic polycyanate, (d) a polymaleimide or (e) a polymerizable ethylenically unsaturated aromatic material are curable to products having excellent mechanical, thermal and chemical resistant properties.

Abstract: An epoxy resin composition containing as a latent hardener a diaminotriazine-modified imidazole compound and dicyandiamide is improved in the usable life of an solder resist ink composition and can give a solder resist also excellent in resistance to an electroless plating bath.

Abstract: Imide functional polyphenols are prepared by reacting an excess of a phenol with an unsaturated diimide which is prepared by reacting an unsaturated polycycloaliphatic dicarboxylic acid anhydride with a diamine.These materials are useful in the preparation of castings, coatings, laminates and the like.

Abstract: A thermosetting resin composition comprising (A) at least one dicyanamide compound and (B) at least one polyvalent imide having one or more unsaturated bonds and, if necessary (C) at least one polymerizable compound of epoxy compounds, phenolic compounds and triallyl isocyanurate compounds, and a prepolymer thereof obtained by subjecting the composition to a preliminary reaction with heating to the B stage can give a cured product having excellent heat resistance of class C and flexibility.

Abstract: Metal, preferably divalent copper, cobalt or nickel, phthalocyanine tetraamines are used as curing agents for epoxides. The resulting copolymers have high thermal and chemical resistance and are homogeneous. They are useful as binders for laminates, e.g. graphite cloth laminate.

Abstract: Adducts of imidazolidine compounds, such as the reaction product of ethylene diamine with cyclohexanone, are provided with organic polyepoxides, especially with low molecular weight polyepoxides where the imidazolidine acts as a chain extender, and the adduct is reacted with an acid to protonate at least 50% of the amine groups in the adduct. These protonated adducts can be dispersed in water to form dispersion which cure with various curing agents. Aqueous electrocoating baths can be provided which electrodeposit at the cathode.

Abstract: Liquid epoxy resin hardeners are mixtures of 2-ethyl-4-methylimidazole, ethyldimethylimidazole and/or diethylmethylimidazole isomers which can also contain other alkylimidazoles, and can be produced by distillation of the products obtained in the dehydrogenation of 2-ethyl-4-methylimidazoline.

Abstract: A mixture consisting of a polymaleimide and a copolymerizable monomer or a prepolymer formed from these two compounds contains, as the polymerization catalyst, an ethane which is substituted by aromatic groups and hydroxyl groups or halogen (cf. formula II), such as benzpinacol. The mixture is stable on storage and heat-curable. It can be cured, while at the same time being shaped to give mouldings, sheet-like structures, laminates, adhesive bonds or foams, for example by casting or compression moulding.

Abstract: The disclosure relates to a novel compound 4,4'-methylene-bis-(2-ethyl-5-methyl imidazole) represented by the structural formula ##STR1## A method is provided for producing the novel compound subjecting formaldehyde or a methylenizing agent to thermal reaction with 2-ethyl-4-methyl imidazole in the presence of a catalyst; and a method of curing an epoxy compound and a method of accelerating curing the epoxy compound and a method of inhibiting crystallization of 2-ethyl-4-methyl imidazole, respectively by use of the new compound.

Abstract: A novel composition is described comprising an admixture of an unsaturated polyimide prepolymer essentially free of terminal amine groups and an epoxy resin having a homopolymerization temperature that is greater than the temperature at which the polyimide polymerizes. These compositions maintain the superior glass transition temperatures and moisture resistance of the polyimide while picking up the desirable handling properties of the epoxy. These compositions have excellent high temperature and moisture resistant properties and excellent storage stability. For instance, carbon composites made with these materials have exhibited 60% shear property retention at 450.degree. F. after being boiled in water for one week. Also described are prepregs comprising the novel composition, methods for curing the novel composition to obtain the superior properties, and articles of manufacture comprising the novel composition.

Abstract: A curable composition comprising an epoxy resin or a monoepoxide and a curing agent comprising a metal salt complex of an adduct of an imidazole and a monofunctional epoxy compound.

Abstract: Adducts of oxazolidine compounds, such as the reaction product of monoethanol amine with cyclohexanone, are adducted with an organic polyepoxide and the adduct is reacted with an acid to protonate at least 50% of the amine groups in the adduct. These protonated adducts can be dispersed in water to form dispersions which cure with various curing agents. When all the epoxy groups are consumed by reaction with the oxazolidine, aqueous electrocoating baths can be formulated which may contain aminoplast resin or phenoplast curing agents.

Abstract: Hydrazides of the formula ##STR1## are good curing agents for epoxy resin, in the formula R.sub.1 and R.sub.2 being each hydrogen atom, C.sub.1 -C.sub.8 alkyl radical or --CH.sub.2 CH.sub.2 SCH.sub.3, R being hydrogen atom or methyl radical. The curing agents are useful in formulating novel storable one-package, heat-curable epoxy resins-based compositions.

Abstract: A one-part epoxy adhesive has been developed that cures rapidly at relatively low elevated temperatures and is based on a diglycidyl ether of bisphenol A (DGEBA), DGBE reacted with glycerol and natural oils, and a unique triple catalyst system of metal imidazole salt, dicyandiamide and a cyclic latent curing agent that liberates diethylenetriamine when heated.

Abstract: Novel imidazolides (N-acylimidazoles) of the formula I ##STR1## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.12 -alkyl or phenyl, and R.sub.2 is hydrogen, orR.sub.1 is ethyl, and R.sub.2 is methyl, orR.sub.1 is hydrogen, and R.sub.2 is phenyl or methyl, andR.sub.3 is a group of any one of the formulae II-VI ##STR2## wherein X.sub.1 is hydrogen, chlorine or NO.sub.2, and X.sub.2 is hydrogen or NO.sub.2.The imidazolides are suitable as curing agents for polyepoxide compounds.

Abstract: The disclosure is concerned with a maleimide-diamine resin composition which is well soluble to a low boiling point solvent and is excellent in heat resistance. The composition is featured by containing a maleimide-diamine adduct having the general formula: ##STR1## wherein A is a mono-, di-, tri- or tetravalent organic group containing at least two carbon atoms, R.sub.1 through R.sub.6 are hydrogen atom, a lower alkyl group, a lower alkoxy group, chlorine atom, bromine atom, trifluoromethyl group, or trichloromethyl group, and m is an integer of 0-4.

Abstract: Paint binders and process of producing same water-soluble upon total or partial neutralization with inorganic or organic acids comprising the reaction product of an epoxy compound having at least two 1,2-epoxy groups with secondary oxazolidine amines and saturated or unsaturated carboxylic acids; said binders having a theoretical amine value of at least 35 mg KOH/g. The paint binders are particularly useful in paints formulated for cathodic deposition. Paints formulated with said binders exhibit good applicational characteristics including throwing power, and the cured films have good mechanical and chemical resistance.

Abstract: A curable composition, and composites comprising (A) an epoxy resin and (B) a heterocyclic compound prepared by reacting at least one aromatic or aliphatic polyamine compound having at least two amine groups, which are separated by no more than one carbon atom, with at least one carbonyl-containing compound selected from the group consisting of aldehydes and ketones.

Abstract: Heat-curable mixtures of one or more epoxide compounds, which, on average, have more than one epoxide group in the molecule, and one or more .beta.-aminocrotonic acid derivatives, such as .beta.-aminocrotononitrile, .beta.-aminocrotonamide or .beta.-aminocrotonic acid esters, and also, if desired, a polyamine or polycarboxylic acid anhydride or a malenimide. The novel curable mixtures are distinguished by outstanding stability on storage, can be processed easily and give moulded materials with good mechanical properties.

Abstract: This invention provides a coating composition comprising at least one 1,2 epoxy resin, a modified imidazole catalyst, and a polyfunctional phenol or polyfunctional acid or dicyandiamide.

Abstract: A liquid curing agent for polyepoxides having terminal epoxide groups is made from a blend of a normally solid aliphatic polyol and a monoimidazole. Cured compositions made from the curing agent and the polyepoxide are useful in various types of plastics applications.

Abstract: Disclosed is a curable resin composition comprising (a) at least one maleimide compound selected from the group consisting of N-(alkenylphenyl)maleimide derivatives, and dimers and polymers thereof and (b) one or more kinds of epoxy resins, each having at least one epoxy group in the unit molecule thereof. The resin composition may contain, besides the above two components, an amino compound as a further component (c). The resin composition may comprise a prepolymer of any two components among the three components (a), (b) and (c) and the remaining component. The resin compositions are useful as molding materials, for the fabrication of laminates, and as varnishes, including insulation varnishes and impregnating varnishes.

Abstract: Nylon compositions are prepared by anionic polymerization of at least 75% of a lactam with up to about 25% of an epoxy component in the presence of a basic catalyst and a promoter that can be used in lactam polymerization wherein, in a preferred embodiment, the epoxy component is a modified epoxy resin containing physical property enhancing constituents. The nylon compositions are prepared by mixing a fraction of a lactam with the epoxy component and the promotor to form liquid mixture A, mixing remaining lactam with the catalyst to form liquid mixture B, mixing liquid mixtures A and B in the ratio ranging from 1/1 to 4/1 to form liquid mixture C, injecting liquid mixture C into a mold maintained at a temperature of about 100.degree. to 200.degree. C. wherein a chemical reaction takes place whereby the liquid is converted to a solidified mass in less than about 2 minutes, and removing the nylon composition in the form of a molded object.

Abstract: A curable resin composition comprising a mixture and/or a preliminary reaction product of (a) polyfunctional cyanate ester, prepolymer of the cyanate ester, or coprepolymer of the cyanate ester and an amine, and (b) acrylic epoxy esters, methacrylic epoxy esters, prepolymers of acrylic epoxy esters, prepolymers methacrylic epoxy esters, coprepolymers of acrylic epoxy esters and methacrylic epoxy esters and mixtures thereof, and a curable resin composition comprising a mixture or a preliminary reaction product of above component (a), above component (b) and (c) a polyfunctional maleimide, prepolymer of the maleimide or coprepolymer of the maleimide and an amine are disclosed. Cured resin having excellent impact-resistance, adhesive power, heat-resistance and chemical resistance can be prepared from the compositions.

Abstract: Diacrylates or dimethacrylates, which are compatible with water before exposure to actinic radiation but after such exposure form hard, insoluble, coatings which are resistant to organic solvents and to water, are made by reaction with (meth)acrylic acid, or with a dicarboxylic acid and a hydroxy group-containing (meth)acrylate, of epoxide groups in an advanced diepoxide resin containing groups of formula ##STR1## where R.sup.4 denotes a divalent (cyclo)aliphatic or araliphatic radical,each R.sup.15 denotes an alkyl group or each pair of R.sup.15 denotes a group of formula --CH.sub.2).sub.2 --, --C(R.sup.16 R.sup.17)CO--, --CH.sub.2 CH(CH.sub.3)--, --CH.sub.2 --.sub.3, or --CO--.sub.2, wherein R.sup.16 and R.sup.17 each represent a hydrogen atom, an alkyl group, or, conjointly, a cycloaliphatic ring, andc is zero or 1.

Abstract: A process for preparing a thermosetting maleimide type prepolymer which comprises reacting (A) a polyfunctional maleimide compound, (B) a bis-maleimide, (C) a diamine and (D) an epoxy compound. The maleimide type prepolymer prepared according to the process of the present invention has rapid curability and excellent solubility in low boiling point solvents such as acetone, methyl ethyl ketone and methyl cellosolve, which are available at low cost. Accordingly, the prepolymer is advantageously used especially for the production of laminated boards having good heat resisting properties, low moisture absorption and good adhesion to various substrates such as a copper foil.

Abstract: Hardenable mixtures which contain a polyepoxide compound with, on average, more than one epoxide group in the molecule, and a hardener of the formula I ##STR1## The symbol n is an integer from 3 to 5. The methylene carbon atoms can be substituted by one or two methyl or ethyl groups.The hardenable mixtures can be used, for example, in the fields of the protection of surfaces or of adhesives technology.

Abstract: A photo-curable resin composition is disclosed comprising (i) a mixture and/or a preliminary reaction product of (a) at least one cyanate compound selected from the group consisting of polyfunctional cyanate esters, prepolymers of the cyanate esters, coprepolymers of the cyanate esters and an amine and mixtures thereof, (b) at least one compound selected from the group consisting of monomers having at least one olefinically double bond prepolymers of the monomers, liquid rubbers having one or more acryloyl or methacryloyl groups and mixtures thereof and optionally (c) at least one maleimide compound selected from the group consisting of polyfunctional maleimides, prepolymers of the maleimides, coprepolymers of the maleimides and an amine and mixtures thereof and (ii) a photo polymerization initiator or a photo sensitizer.

Abstract: Extremely rapid ambient curing of polyepoxide resins and mixtures of polyepoxide resins and polyacrylate esters is achieved by use of a curing system composed of at least one polymercaptan and at least one catalytic co-curing agent which is the condensation product of:(a) aliphatic amine or substituted aliphatic amine containing at least one primary aliphatic amine group where the aliphatic moiety is ethylene or greater with(b) at least one amino acid, its corresponding lactam or other amide forming derivative.Optionally, known Lewis Base catalysts for the epoxy/mercaptan reaction, such as tertiary amines, may also be used.

Abstract: Resin-forming polyepoxides are mixed with polyoxazolidinyl compounds or polymers containing pendant oxazolidinyl groups in which the carbon atom in the 2-position of the heterocyclic ring is substituted with saturated hydrocarbon groups, such as dialkyl, or with an alkylene group forming a saturated ring with the carbon atom in the 2-position of the oxazolidinyl ring to form, in the absence of water, a stable composition which can be stored in closed containers for months without undergoing gelation. When such compositions are spread into films and the films exposed to moisture at ambient temperature, e.g., to ambient air having a relative humidity of at least 20% and temperature of about 15.degree. to 25.degree. C., the polymer serves to react with and cure the polyepoxide.

Abstract: Resins are obtained from blends of epoxide and imide containing or derived compounds, which have good resistance to mechanical deformation at elevated temperatures and good adhesion to inorganic materials such as metals and ceramics. These resins are particularly useful for making composite materials and molded articles.

Abstract: A curable resin composition comprising (i) a catalytic composite comprising a peroxide and other catalytic component and (ii) a mixture or a preliminary reaction product of (a) a polyfunctional cyanate ester, prepolymer of the cyanate ester or coprepolymer of the cyanate ester and an amine and (b) a polyfunctional maleimide, prepolymer of the maleimide or coprepolymer of the maleimide and an amine and optionally (c) other component is disclosed. The composition cures rapidly at a low temperature and is preferable from view point of quantity production and workability. The composition is excellent in respect of adhering property, heat-resistance, moisture-resistance and chemical-resistance, and is useful for preparing laminated products, molded products, paint, powder paint, adhesive or varnish.

Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.

Abstract: A curable resin composition comprising a mixture and/or a preliminary reaction product of (a) polyfunctional cyanate ester, prepolymer of the cyanate ester, or coprepolymer of the cyanate ester and an amine, (b) acrylic esters, methacrylic esters, prepolymers of acrylic esters, prepolymers methacrylic esters, coprepolymers of acrylic esters and methacrylic esters and mixtures thereof, and (c) a polyfunctional maleimide, prepolymer of the maleimide or coprepolymer of the maleimide and an amine are disclosed. Cured resin having excellent impact-resistance, adhesive power, heat-resistance and chemical-resistance can be prepared from the compositions.

Abstract: A curable resin composition comprising a mixture and/or a preliminary reaction product of (a) at least one cyanate compound selected from the group consisting of polyfunctional cyanate esters, prepolymers of said cyanate esters, coprepolymers of said cyanate esters and an amine and mixtures thereof, (b) at least one polyisocyanate compound selected from the group consisting of polyisocyanates, prepolymers of said polyisocyanates, coprepolymer of said polyisocyanates and an acid anhydride and mixtures thereof and (c) at least one maleimide compound selected from the group consisting of polyfunctional maleimides, prepolymer of said maleimides, coprepolymers of said maleimides and an amine and mixtures thereof is disclosed.

Abstract: A mixture for the preparation of novel cross-linked nitrogen-containing polyadducts, which contains(a) a N-cyanolactam of the formula I or II ##STR1## and (b) a monomeric or oligomeric organic compound having not less than 2 C atoms and not less than 2 hydroxyl groups.The mixture, with or without addition of a monohydroxy compound, can be used as a casting resin or adhesive, or for the production of foams or coatings.The symbols in the formula are all as defined in claim 1.

Abstract: Imide-anhydrides having the structure ##STR1## wherein 1 and 2 are certain cycloaliphatic or aromatic groups and Z is selected from certain imide-anhydride and other substituents have been found to provide cured epoxy resin systems characterized by high temperature stability and excellent mechanical and physical properties.

Abstract: Heat-curable mixtures of one or more epoxide compounds, which, on average, have more than one epoxide group in the molecule, and one or more .beta.-aminocrotonic acid derivatives, such as .beta.-aminocrotononitrile, .beta.-aminocrotonamide or .beta.-aminocrotonic acid esters, and also, if desired, a polyamine or polycarboxylic acid anhydride or a maleimide. The novel curable mixtures are distinguished by outstanding stability on storage, can be processed easily and give moulded materials with good mechanical properties.

Abstract: Imidazole or substituted imidazole is adducted with acrylate ester, an epoxy, or an isocyanate followed by neutralization with lower fatty acid or alkylene or aromatic dicarboxylic acid. The product is a curing agent which is combined with an epoxy resin to form a powder coating.

Abstract: Storage stable epoxy resin powder coating compositions are disclosed, which contain a solid epoxy resin and, as hardening agent, a blocked polyisocyanate compound or isocyanate terminated polymer, wherein the blocking agent is an imidazoline compound.

Abstract: The invention is directed to curable compositions comprising an azole-functional resin and a labile metal-ligand complex. The azole-functional resin is the reaction product of a monomeric or polymeric resin and a reactive N-heterocyclic compound containing at least two nuclear nitrogen atoms in a 5-membered ring structure capable of forming stable metal-ligand complexes. Mixtures of azole-functional resins also may be used with the labile-metal ligand complexes in the compositions of the invention.

Abstract: A polymer precursor containing an oxazolin-2-one ring is made by reacting (a) an amino-reactive group containing compound having at least two groups capable of entering into an addition or condensation reaction with primary or secondary aromatically-bound amino groups with (b) an aromatic amine having at least one primary or secondary aromatically-bound amino group and at least one condensed oxazolin-2-one ring. The reactants are used in quantities such that for each aromatically bound primary or secondary amino group there are from 0.95 to 5 groups present in the amino-reactive group containing compound which are capable of reacting with the amino group. These polymer precursors may be used to produce high molecular weight polymers useful in the production of solid molded products, adhesives, foam plastics and coatings.

Abstract: A process for preparing a thermosetting imide type prepolymer which comprises heating a bis-imide (A) and a diamine (B) in the presence of an organic solvent with a boiling point of 70.degree. to 170.degree. C. and heating the reaction mixture together with an epoxy compound (C). The imide type prepolymer prepared according to the process of the present invention has rapid curability and excellent solubility in low boiling point solvents such as acetone, methyl ethyl ketone and methyl cellosolve, which are available at low cost. Accordingly, the prepolymer is advantageously used especially for the production of laminated boards having good heat resisting properties, low moisture absorption and good adhesion to various substrates such as a copper foil.

Abstract: Oligomeric, essentially linear epoxide resins with chlorine-containing and/or bromine-containing benzimidazolone radicals in the oligomer chain are particularly suitable as flameproofing agents for thermosetting and thermoplastic polymers.

Abstract: Imide-amines having the structure ##STR1## wherein ##STR2## are certain cycloaliphatic or aromatic groups and R and R individually are hydrogen, halogen, an alkyl group having from 1 to 4 carbon atoms, hydroxy, carboxyl, and amine and when taken together represent ##STR3## wherein R.sup.2 is the same as R and R.sup.1, have been found to provide cured epoxy resin systems characterized by high temperature stability and excellent mechanical and physical properties.