Abstract: The present invention is directed to a process for the preparation of an aqueous polyurea dispersion bya) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0i) a polyisocyanate which has an average functionality of 1.5 to 4.0 and an isocyanate content of at least 12% by weight andii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least at an NCO:OH equivalent ratio of 0.5:1.0 to 2.0:1.01000 andb) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.The present invention is also directed to the aqueous polyurea dispersion prepared by this process.

Abstract: The invention relates to a thermosetting composition which comprises at least one blocked polyisocyanate of formula I or II ##STR1## wherein n is an integer .gtoreq.2,Q is an organic radical of valency n, andR.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 are each independently of one another hydrogen, alkyl, aryl, arylalkyl, alkoxy, alkylthio or hydroxyl, anda primary or secondary polyamine which is liquid at room temperature and is suitable for crosslinking,which blocked polyisocyanate is essentially insoluble in the polyamine at ambient temperature or moderately elevated temperature.The novel compositions invention have a particularly high reactivity and good shelf stability. An important embodiment of the invention relates to those compositions in which the blocked isocyanate is essentially insoluble in the polyamine at the storage temperature. The novel compositions are especially suitable for bonding plastics materials and metals.

Abstract: Disclosed herein is an improved elastomer comprising a reaction product of a polyisocyanate and an active hydrogen containing material, the improvement wherein the elastomer is essentially free of a chain extender, wherein the polyisocyanate comprises 4,4'-diisocyanato dicyclohexylmethane containing from about 45 to 100 percent of the trans,trans isomer.

Abstract: Provided are a cyclodextrin polymer containing cyclodextrin in the backbone chain of a high-molecular weight compound selected from a polyurethane, a polyurea, an unsaturated polyester, a polyester, a polycarbonate, a polyamide and a polysulfone, as well as a cyclodextrin membrane prepared using said polymer.In accordance with the present invention, an increased amount of cyclodextrin unit can be immobilized and the function thereof is significantly improved; further, by using a specific high-molecular weight compound, the polymer obtained is rendered insoluble in water, etc. and yet decomposable with enzymes and it can accordingly be used as a degradable polymer. Further, there can be provided a cyclodextrin membrane which contains a large extent of cyclodextrin and which can be used alone as a membrane.

Abstract: Disclosed herein is an improved polyurea system comprising a reaction product of a polyisocyanate and a polyamine and an amine chain extender, the improvement comprising the polyisocyanate containing diethyl methylene diisocyanate, a prepolymer thereof or a mixture thereof, in an amount sufficient to slow down the reaction for use in a reaction injection molding.

Abstract: A polyurea resin molding composition for reaction injection molding use which comprises (a) a polyoxyalkylenepolyamine, (b) an aromatic polyamine and/or a xylylenediamine and (c) a polyisocyanate, wherein either one or both of components (a) and (b) have been modified by a Michael reaction with an unsaturated compound of the formula CH.sub.2 .dbd.C(R)--Y wherein R is H or CH.sub.3 and Y is an electron attracting group. The use of such modified polyamine(s) improves in-mold flow and green strength characteristics.

Abstract: Novel nonlinearly optically active polymers, well suited for electrooptical applications, are prepared by copolymerizing a first difunctional monomer with a second difunctional comonomer, with at least one of such difunctional monomers including a polar charge transfer moiety containing at least one electron acceptor group and at least one electron donor group (D), and further wherein the polymerizable functional groups are borne by the one or more electron donor groups (D).

Abstract: A process for the production of expanded polyurea elastomers which comprises reacting:a) an aliphatic polyetheramine having primary amino functions and essentially no free hydroxyl groups;b) carbon dioxide in the form of carbamate, obtained by reacting carbon dioxide with a portion of the aliphatic polyetheramines;c) a polyisocyanate;d) water; ande) a catalyst having a tertiary amino group;in the presence off) an inert, halogen-free blowing agent.

Abstract: A reaction product useful for preparing radiation-sensitive materials, in particular materials whose solubility in water or aqueous alkali increases on irradiation, contains urea and urethane groups and also carboxyl groups and is obtained by reaction ofi) an ethylenically monounsaturated or polyunsaturated mono- or polyalcohol withii) a di- or polyisocyanate,iii) at least one amino compound andiv) at least one anhydride of an at least dibasic carboxylic acid,the number of NCO and anhydride groups in ii) and iv) being equal to or less than the number of groups in i) and iii) which are reactive therewith.

Abstract: Sprayable aliphatic polyurea-polyurethane coating compositions and methods are disclosed. A quasi-prepolymer composition is prepared by mixing an aliphatic polyisocyanate with a stoichiometrically deficient quantity of polyol such that substantially all of the available hydroxyl groups of the polyol react with the isocyanate groups of the aliphatic polyisocyanate. Suitable catalysts may be used to accelerate the urethane bonding in the quasi-prepolymer compositon. The polymeric coating is preferably formed by reacting the quasi-prepolymer composition with a low molecular weight or a mixture of low and high molecular weight amine terminated polyether compounds. The amine terminated polyether compounds have amine groups capable of reacting with the unreacted isocyanate groups of the quasi-prepolymerMixing of the quasi-prepolymer composition and the amine terminated polyether is preferably done at a sufficiently fast rate of result in a substantially homogeneous product.

Abstract: The present invention is directed to a novel internal release agent, a mixture of isocyanate reactive materials containing the release agent and a RIM process using the release agent. The novel release agent is a reaction product of 1) a polyester prepared by reacting (a) a polymerized fatty acid with (b) a relatively low molecular weight hydroxy group containing compound, and 2) a saturated monocarboxylic acid.

Abstract: The present invention relates to a process for the preparation of a modified 1,5-naphthylene diisocyanate containing urea and biuret groups comprising reacting(a) 1,5-naphthylene diisocyanate in molten form with(b) a mixture comprising about 0.02 to about 0.5 mole of water per mole of 1,5-naphthylene diisocyanate and about 1 to about 10 parts for each part of water of an organic solvent.The present invention further relates to a process for the preparation of elastomeric moldings comprising reacting by the one-shot or prepolymer process at an isocyanate index of 70 to 130 a modified 1,5-naphthylene diisocyanate containing urea and biuret groups with compounds containing at least two isocyanate-reactive groups and having a molecular weight in the range from about 500 to about 10,000 and, optionally, organic compounds containing isocyanate-reactive groups and having a molecular weight in the range from 60 to 499.

Abstract: The present invention is directed to a novel internal release agent, a mixture of isocyanate reactive materials containing the release agent and a RIM process using the release agent. The novel release agent is an ester prepared by reacting a specific tetrol with a mixture of a saturated and an unsaturated acid.

Abstract: The invention is concerned with an isocyanate-reactive composition comprising a polymer having a molecular weight of at least 500 containing a plurality of groups of the formula: ##STR1## wherein R.sup.1 represents hydrogen or a hydrocarbon radical;R.sup.2 represents a hydrocarbon radical;R.sup.3 represents an organic radical carrying at least one isocyanate-reactive group, andR.sup.4 represents hydrogen or an optionally substituted hydrocarbon radical. Such compositions are useful for making moulded elastomers and flexible foams.

Abstract: Macromolecular species such as enzymes, proteins, drugs, and solid supports which contain reactive carbonyl, groups or groups which are readily converted to reactive carbonyl groups are modified by reaction with a compound of the formula ##STR1## in which R.sup.1 is H, C.sub.1 -C.sub.20 alkyl, phenyl, (C.sub.1 -C.sub.10 alkyl)-substituted phenyl, or phenyl-substituted C.sub.1 -C.sub.10 alkyl; R.sup.2 is C.sub.2 -C.sub.5 alkylene or (C.sub.1 -C.sub.4 alkoxy)-substituted C.sub.2 -C.sub.5 alkylene; R.sup.3 is ##STR2## R.sup.4 is H or C.sub.1 -C.sub.4 alkyl; n is at least 5; and m is zero or 1.

Abstract: The present invention relates to a process for the production of elastic, compact or cellular moldings based on elastomers containing N-benzylurea groups in bound form, by reactinga) one or more organic and/or modified organic polyisocyanates withb) N-benzylpolyoxyalkylene-polyamines or mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups andc) one or more alkyl-substituted aromatic polyamines having a molecular weight of up to 500,in the presence or absence ofd) catalystsand, if desired,e) blowing agents,f) auxiliaries and/org) additives,and to the N-benzylpolyoxyalkylene-polyamines and mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups which can be used for this purpose, and to the elastomers prepared.

Abstract: The present invention is directed to a RIM process and an isocyanate-reactive mixture useful therein. The mixture comprisesi) a polyether having at least two isocyanate-reactive groups and a molecular weight of from 1800 to 12,000 in which at least 50% of the isocyanate-reactive groups are primary and/or secondary amine groups,ii) an amine-terminated chain extender, andiii) from 2 to 20 parts by weight per 100 parts by weight of components b) and c) of propylene carbonate.

Abstract: Disclosed is a method for preparing aliphatic polyureas in varying reaction times which comprises reacting polyoxyalkylene polyamines, an aliphatic diisocyanate and a sym-dialkylethylenediamine.

Abstract: Improved two-component polyurethane adhesives contain an isocyanate and a stabilized epoxide and at least one isocyanate-reactive compound.

Abstract: Disclosed herein is a stable fluid mixture and a binding composition containing the same; said mixture comprises a polyisocyanate and a solution of urea in water which is characterized in that the urea is premixed with water before it is admixed with the polyisocyanate to make a urea extended polyisocyanate.

Abstract: Products of the reaction of (a) a polyisocyanate, (b) a CH-active alkyl ester, (c) a polyoxyalkyleneamine and (d) if appropriate a further NH- and/or OH-reactive compound as the curing component for binders (B) which contain groups which are capable of amide and/or ester formation.Mixtures of (A) and (B), and where appropriate diluents (C) and additives (D), have a long shelf life, even in aqueous systems, and are particularly suitable for aqueous paint formulations.

Abstract: The present invention relates to a process for the preparation of a polyurethane coating by coating a substrate with a coating composition containinga) a polyisocyanate component andb) an isocyanate-reactive component containing at least one compound corresponding to the formula ##STR1## wherein X represents an organic group which has a valency of n and is inert towards isocyanate groups at a temperature of 100.degree. C. or less,R.sup.1 and R.sup.2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less,R.sup.3 and R.sup.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less andn represents an integer with a value of at least 2,and curing the coating composition at a temperature of 100.degree. C. or less.

Abstract: The present invention is directed to a novel internal release agent for the production of polyurethane and/or polyurea elastomers, to an isocyanate reactive composition containing that release agent and to the use of the release agent in a RIM process. The release agent is the reaction product of i) a polyester derived from a polymerized fatty acid and either neopentyl glycol or 2,2,4-trimethyl-1,3-pentane diol and ii) an aliphatic monoisocyanate.

Abstract: The present invention is directed to a novel internal release agent for the production of polyurethane and/or polyurea elastomers, to an isocyanate reactive composition containing that release agent and to the use of the release agent in a RIM process. The release agent is the reaction product of i) a transester of a) a polyester derived from a polymerized fatty acid and either neopentyl glycol or 2,2,4-trimethyl-1,3-pentane diol and b) an acetoacetate and ii) an aliphatic monoisocyanate.

Abstract: A pourable and/or sprayable polyurea elastomer is disclosed. The elastomer includes an isocyanate, an amine terminated polyoxyalkylene polyol, and a chain extender. The isocyanate is preferably a quasi-prepolymer of an isocyanate and a material selected from at least one polyol, a high molecular weight polyoxyalkyleneamine or a combination thereof. The chain extender includes at least di(methylthio)-toluene diamine. A method for improving the flowability of a polyurea elastomer, thereby permitting the elastomer to be sprayed or, optionally, poured, is also disclosed.

Abstract: The present invention is directed to a one-component polyurethane or polyurea composition which may be cured at either ambient or elevated temperature and is based ona) a liquid blocked polyisocyanate wherein the isocyanate groups have been blocked with a phenolic blocking agent.b) a solid polyamine salt which is insoluble in and dispersed throughout the liquid blocked polyisocyanate, the solid polyamine salt being based on the reaction product of a polyamine with an organic or inorganic acid.The present invention is also directed to a process for the preparation of a high molecular weight polymer by heating the one-component composition at elevated temperature or by adding a polar solvent to the above coating composition and allowing the composition to cure.

Abstract: The invention is related to an adhesive comprising a stable, fine particle size aqueous dispersion of polyurethane-urea which is the reaction product of an isocyanate-terminated prepolymer with an amine-containing chain extending agent which is characterized in that the functionality of said agent is about 2.05 to about 2.50. The adhesive was surprisingly and unexpectedly found to exhibit an increased softening point temperature as compared to the corresponding temperature of related adhesives which contains no such chain extending agent.

Abstract: The present invention relates to a process for the production of elastic, compact or cellular moldings based on elastomers containing N-benzylurea groups in bound form, by reactinga) one or more organic and/or modified organic polyisocyanates withb) N-benzylpolyoxyalkylene-polyamines or mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups andc) one or more alkyl-substituted aromatic polyamines having a molecular weight of up to 500,in the presence or absence ofd) catalystsand, if desired,e) blowing agents,f) auxiliaries and/org) additives,and to the N-benzylpolyoxyalkylene-polyamines and mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups which can be used for this purpose, and to the elastomers prepared.

Abstract: A method of making a reaction injection moulded elastomer which includes injecting into a mould cavity a reaction mixture including:(A) an organic polyisocyanate, and(B) an isocyanate-reactive composition comprising the reaction product of:(a) the reaction product of a polyol or polythiol having an average hydroxyl or thiol functionality of from about 1.5 to about 6 and an average molecular weight of from about 100 to about 12,000 and an acylating agent, and(b) a polyfunctional compound which is capable of reacting with reactant (a) to provide a product containing a plurality of isocyanate-reactive groups.

Abstract: An isocyanate-reactive composition comprising the reaction product of:a) an organic compound having the formula:Q--[X--COY].sub.norQ--[X--CO--R--(COY).sub.m ].sub.nwherein Q represents an organic residue, X-represents oxygen or sulphur, Y represents a halogen atom or an aryloxy group, R is a polyvalent hydrocarbon radical, m is a whole number from 1 to 3 and n is a whole number of at least 2, andb) a polyfunctional compound which is capable of reacting with reactant (a) and contains at least one imino or enamino group.

Abstract: The present invention is directed to a reactive polyurethane mixture comprising:A) at least one polyisocyanate,B) a polyol mixture comprising:B1) at least one polyol containing three or more hydroxyl groups and having a molecular weight in the range from 800 to 6,000,B2) at least one polyol containing three or more hydroxyl groups and having a molecular weight in the range from 400 to 799 andB3) at least one polyol containing three or more hydroxyl groups and having a molecular weight in the range from 92 to 399, andC) at least one polyamine.

Abstract: The resin composition of this invention comprises an isocyanurate ring-containing polyisocyanate such as trimeric hexamethylene-1,6-diisocyanate, an epoxy compound such as bisphenol A epoxy resin, and an aromatic polyamine such as 3,3'-dichloro-4,4'-diaminodiphenylmethane. This resin composition is particularly suitable for the manufacture of shaped articles to be used in high temperature environments.

Abstract: The present invention relates to a process for preparing polyurethane/polyurea or polyurea elastomers by spray processing or reaction injection molding a reaction mixture comprising an A-side and a B-side, wherein said A-side comprises a polyisocyanate or an isocyanato-terminated polyurethane prepolymer and wherein said B-side comprises a polyol or polyamine plus a chain extender, in order to form a polyurethane/polyurea or polyurea elastomer, said polyol having an equivalent of between about 1,000 and about 20,000, a preferred molecular weight of between about 5,000 and about 30,000 and an end group unsaturation level of no greater than 0.

Abstract: The invention relates to a process for the production of polyamide imides from diimidodicarboxylic acids, trimellitic imidocarboxylic acids and diisocyanates and to their use as moldings, films and binders for paints.

Abstract: A new class of transition metal bis(dithiolene) complex polymers having improved physical characteristics. These polymers are generally prepared by first preparing a bifunctionalized transition metal bis(dithiolene) complex, then reacting the bifunctionalized complex with one or more other bifunctional compounds. A wide variety of flexible linkage can be incorporated into the polymer chain via the bifunctional reactant to vary the physical properties of the resulting polymer. The polymers can be used as near infrared filters, both as supported and freestanding films.

Abstract: A process for producing polyurea resin in which an amine compound containing aromatic polyamine and specific aminobenzoate derivative and polyisocyanate are reacted. The polyurea resin is decreased in temperature dependence and improved in hardness, strength, toughness, and heat resistance.

Abstract: The invention relates to a process for the production of elastic, compact or cellular moldings based on elastomers containing N-substituted urea and amide groups in bound form, by reactinga) one or more organic and/or modified organic polyisocyanate withb) a polyazomethine-containing polyoxyalkylene-polyamine mixture (b) which contains:bi) one or more polyoxyalkylene-polyaldimine and/or polyketimine,bii) one or more polyoxyalkylene-polyamine containing terminal secondary amino groups, and, if desired,biii) one or more polyoxyalkylene-polyamine containing terminal primary amino groups andc) one or more alkyl-substituted aromatic polyamine having a molcular weight of up to 500, in the presence or absence ofd) catalyst, and, if appropriate,e) blowing agents,f) auxiliaries and/org) additives,to polyazomethine containing polyoxyalkylene - polyamine mixtures which can be used for this purpose and to the prepared elastomers.

Abstract: Fecal leakage and contamination from the vent opening of an animal carcass during slaughtering and processing methods is reduced or eliminated by applying a curable adhesive composition to the vent opening and permitting the applied curable composition to cure to form a cured firmly adherent vent seal after slaughtering but prior to other processing steps. In a preferred embodiment, the curable adhesive comprises a cyanoacrylate adhesive which cures in a matter of seconds under processing conditions to form a cured vent seal which retains its sealing integrity even upon exposure to high temperature and high humidity environments encountered at downstream processing stations. The curable sealing compositions are safe in the fully-cured state and do not liberate undesirable materials during curing.

Abstract: A polyurea elastomer is disclosed. The elastomer includes an isocyanate, an amine terminated polyoxyalkylene polyol, and a chain extender. The isocyanate is preferably a quasi-prepolymer of an isocyanate and a material selected from at least one polyol, a high molecular weight polyoxyalkyleneamine or a combination thereof. The chain extender includes a minor amount of a tetraalkylpiperazine and a major amount of diethyltoluenediamine. A one-step method of making the tetraalkylpiperazine and tetraalkylpiperazinone is also disclosed. The method includes reacting a 2-amino-2-alkyl-1-alkanol in the presence of a nickel-iron-copper-manganese catalyst.

Abstract: Polyisocyanate compositions with useful properties are obtained by reacting uretonimine and/or carbodiimide modified polyisocyanates with carboxylic acids.The polyisocyanate compositions are useful in the preparation of elastomeric products.

Abstract: A polyurea of the general formula ##STR1## where X and Y are. independently of one another, a divalent radical whose chain contains in each case at least two carbon atoms, and A and B are, independently of one another, H or (C.sub.1 -C.sub.26)alkyl, and n is an integer greater than 4, which polyurea contains at least one (C.sub.6 -C.sub.26) alkyl group per repeating unit, is prepared by reacting the diamine NHA-X-NHB with roughly the equimolar amount of a diisocyanate OCN-Y-NCO. The polyurea is suitable for preparing ordered monomolecular LB films on a base (film-substrate-system). For this purpose it is dissolved in a volatile organic solvent which is not miscible with water, the solution is spread at the water/air interface, and the layer formed is compressed after the solvent has evaporated and it is transferred to a solid layer base by the Langmuir-Blodgett technique.

Abstract: The present invention relates to a thermosetting resin having high thermal resistance, high strength, flame resistance, and good processability which can be obtained by reacting polycarbodiimide substantially produced form one or more kinds of organic polyisocyanate with crosslinking agents having two or more active hydrogen groups in their molecules, one or more kinds of compounds having epoxy groups in their molecules or compounds capable of accelerating the trimerization reaction of carbodiimide, and production methods thereof.

Abstract: Disclosed is a class of poly(aminoaromatic) compounds (I) obtained by capping polymeric polyols or polythiols iwth aromatic amine groups wherein the latter groups are linked by --O-- or --S-- to the polyol (polythiol) residues. Also disclosed are the precursor poly(nitroaromatic) compounds (II) from which the compounds (I) are derived.The polyamines are characterized by amine reactivities in respect of isocyanate polyaddition reactions which allows for polymer reaction rates that are intermediate of prior art related polyamine compounds.Accordingly, the compounds (I) find their prime utility in the formation of synthetic resins containing polyurea linkages.

Abstract: A process for making integral skin foams which comprises reacting into a closed mould:A) an organic polyisocyanateB) an isocyanate-reactive composition comprising:(i) a catalytically effective amount of a urethane-promoting catalyst and optionally a urea-promoting catalyst,(ii) a catalytically effective amount of a carbodiimide-promoting catalyst, and(iii) an isocyanate-reactive compound; in the presence ofC) an inert physical blowing agent.The process provides integral skin foams having good skin properties at reduced physical blowing agent levels.

Abstract: Disclosed herein is a process for the preparation of an o-aminophenyl derivative of a polyalkyleneoxy polyamine which comprises adding a polyalkyleneoxy polyamine to a dispersion or solution of an isatoic anhydride under reaction conditions sufficient to form the corresponding o-aminophenyl derivative. Also disclosed is an o-aminophenyl derivative of a modified polyamine comprising a backbone portion containing at least one polyalkyleneoxy moiety and one or more internal urea, biuret, amide, thiourea, dithiobiuret, or thioamide moieties, and a plurality of o-aminophenyl end groups wherein each o-aminophenyl group is separated from each urea, biuret, amide, thiourea, dithiobiuret, or thioamide moiety by at least one alkylene, cycloalkylene, aralkylene, arylene, or alkyleneoxy moiety with 4-20 carbon atoms, or at least one polyalkyleneoxy moiety containing from 2-50 alkyleneoxy units; as well as prepolymers and polymers prepared therefrom.

Abstract: The present invention relates to a process for the preparation of moldings or films based on polyisocyanate polyadducts comprising thermoplastically molding, at a temperature of at least 50.degree. C. and at a pressure of at least 5 bar, polyisocyanate polyadducts obtained by reacting in closed molds using the reaction injection molding technique aromatic polyisocyanates; compounds having a molecular weight of from 1800 to 12,000 and containing on a statistical average at least 2.5 isocyanate-reactive groups; and one or more components selected from a diamine containing two primary and/or secondary aromatically bound amino groups and and an aliphatic or cycloaliphatic polyol or polyamine; with the provisos that the quantity of isocyanate-reactive compound is at least 30% by weight based on the total quantity of the components and that at least one of the diamine, polyol, or polyamine components comprises at least 5% by weight based on the weight of the isocyanate-reactive compound.

Abstract: Novel aromatic diamines which are useful as chain extenders for urethane and urea polymers are compounds corresponding to the formula: ##STR1## wherein two of the R, R', and R" substituents are alkyl groups containing 1-6 carbons and the other substituent is a hydrocarbylthio group containing 1-6 carbons.

Abstract: Disclosed is an elastomer comprising the reaction product of an aromatic isocyanate component, an aliphatic isocyanate component with a functionality of at least two, and having an aromatic diamine component in the curing agent composition. The aromatic isocyanate component is one or more of the following: aromatic isocyanates, aromatic isocyanate terminated aliphatics, aromatic isocyanate terminated cycloaliphatics, aromatic isocyanate terminated quasi-prepolymers, and aromatic isocyanate terminated prepolymers. The aliphatic isocyanate component is one or more of the following: isocyanate terminated aliphatics, cycloaliphatic isocyanate with at least two isocyanates, isocyanate terminated quasi-prepolymers, and isocyanate terminated prepolymers.

Abstract: Dendritic macromolecules and a novel convergent process for producing the same are disclosed. The convergent process enables the accurate control and design of the surface functionality of the macromolecule.

Abstract: A process for producing polyurea resin in which an amine compound containing aromatic polyamine and specific aminobenzoate derivative and polyisocyanate are reacted. The polyurea resin is decreased in temperature dependence and improved in hardness, strength, toughness, and heat resistance.