Abstract: Described herein is a process for the preparation of 1,3-dioxan-2-one group-containing oligourethanes by reacting a) hydroxy-functional 1,3-dioxan-2-ones with b) compounds having an average of at least two isocyanate groups per molecule; the oligourethanes obtainable by this process; and their use, optionally in combination with compounds containing active hydrogen atoms, for the preparation of plastics or as a binder or binder component in coating compositions.

Abstract: A modified epoxy resin is prepared by mixing an isocyanate terminated urethane prepolymer with an epoxy resin in reactive conditions. The modified epoxy resin has a low internal stress when it is cured due to the flexible backbone of the urethane prepolymer incorporated therein, and has a high glass transition temperature due to a rigid oxazolidone structure formed via the epoxy ring opening with the isocyanate groups, and thus is useful as an electronic encapsulant.

Abstract: Directly shapeable clear solutions of polyamide imides and a method for preparing same are provided. The solutions are obtained by polycondensation in .gamma.-butyrolactone (.gamma.BL) in substantially stoichiometric proportions between toluylene diisocyanate and an aromatic acid anhydride, and by dilution in (.gamma.BL) to give a solution allowing them to be processed at a later stage. Yarns and fibers made from said solutions are also described.

Abstract: An epoxy resin composition consisting essentially of an epoxy resin, a thixotropy-imparting agent, a filler used as necessary, water and a polycarbodiimide resin; and an epoxy resin-based adhesive comprising the above epoxy resin composition and a curing agent. The above epoxy resin composition has excellent thixotropy and low stringiness; and the above epoxy resin-based adhesive, when cured, shows neither metal corrosion nor reduction in moisture resistance despite the presence of water in the adhesive, and has excellent heat resistance and adhesivity.

Abstract: Poly(ether-urethanes) can be made from cyclic ethers and organic isocyanates by using selected metal compounds as catalysts. Polymers useful as thermoplastic elastomers, spandex fibers or urethane rubbers can be made by reacting diisocyanates containing functional groups with a tetrahydrofuran, especially tetrahydrofuran itself. The invention also discloses an improved process for the cationic polymerization of a cyclic ether by using an organic isocyanate.

Abstract: The invention is a two-part adhesive containing as a first part:A. a polyurethane prepolymer having reactive isocyanate moieties;and a second partB. a curative composition containingi) a polyurea, comprising the reaction product of a polyamine and a polyisocyanate, dispersed in a polyether polyol-based polyurethane prepolymer having reactive hydroxyl moieties, and optionally a plasticizer;ii) a compound having at least one oxazolidine moiety capable of reacting with an isocyanate under curing conditions; andiii) a catalyst capable of catalyzing the reaction of isocyanate and hydroxyl moieties in the presence of moisture.

Abstract: Disclosed as a particular isocyanate prepolymer composition particularly suitable for use in polyurethane compositions having particular applicability for producing microcellular molded polyurethane articles particularly suitable for use as sealing devices. In particular, the isocyanate prepolymer composition is the result of reacting an isocyanate blend (a) having(i) 0 to 10 pbw 2,4'-diphenylmethane diisocyanate;(ii) 30 to 80 pbw 4,4'-diphenylmethane diisocyanate;(iii) 1 to 10 pbw of a mixture of uretonimine with from 10 to 70 parts by weight of a polyol (b) having a number average molecular weight of between 1000 and 10,000, and a hydroxyl number of between 10 to 75. The resulting isocyanate prepolymer (I) has a free NCO of less than 20 and a viscosity of from 200 to 1000 cPs.

Abstract: This invention relates to polymers having non-linear optical properties which polymers include fluorene moieties having at least one electron accepting group and at least one electon donating group substituted to different phenyl rings of the fluorene moiety.

Abstract: The present invention relates to heat-curable, cyclic isocyanate addition productsi) which are the reaction products ofa) a polyisocyanate component having an average isocyanate functionality of two or more and a uretdione group content (calculated as N.sub.2 C.sub.2 O.sub.2, MW 84) of 1 to 30%, based on the weight of the polyisocyanate component, withb) a compound containing two or more isocyanate-reactive groups andii) in which at least 10% by weight of the reaction products are in the form of cyclic groups containing urea and/or urethane groups. The present invention also relates to a process for the preparation of these cyclic isocyanate addition products and to the products obtained by curing these compositions, optionally in the presence of other isocyanate-reactive compounds, at elevated temperatures, e.g., coatings, adhesives, molded articles, elastomers and foams.

Abstract: Polyurethane polymers having pendant carbamate groups are disclosed. The polymers are prepared by:(a) reacting a mixture comprising a polyol having at least one pendant carbamate group and a polyisocyanate to form a polyurethane having pendant carbamate groups, and(b) optionally, capping the polyurethane from (b) with an active hydrogen-containing capping agent.

Abstract: The present invention relates to a method for adhering two or more substrates by(1) applying to a surface of one of said substrates a non-sagging polyurea adhesive composition comprising the reaction product of:(a) a polyphenyl polymethylene polyisocyanate or a urea-modified prepolymer thereof and(b) an isocyanate-reactive component comprising amines consisting essentially of(i) an aminocrotonate-terminated polyether containing at least two secondary amino groups prepared by reaction of a polyfunctional acetoacetylated polyether polyol with a primary monoamine, and(ii) a low molecular weight aromatic and/or aliphatic diamine, and(2) contacting said substrate with a surface of a second substrate, and(3) curing the polyurea adhesive composition.

Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo[2.2.1]heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclohexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.

Abstract: The present invention provides soft contact lenses adopted for placement over the cornea or in the eye which have a high oxygen permeability, a low water content and excellent mechanical properties. Moreover, the lenses of the instant invention have excellent protein and lipid deposition resistance relative to conventional contact lenses. Such lenses having the properties mentioned above comprises a prepolymer which contains an alkoxylate glucoside that is derivatized with at least one polysiloxane compound. The prepolymer is then placed in a suitable mold and polymerized by exposure to ultraviolet light.

Abstract: Polymeric, catalytically-active compounds having imidazole groups linked terminally and/or laterally to the polymer chain through reactive groups on the polymer chain are disclosed. The polymer chain is selected from the group consisting of polyether ketones; acidic, basic, or neutral ion exchange resins; polymeric isocyanates; polymers or copolymers containing maleic acid or maleic anhydride; and polymers containing benzyl halide groups.

Abstract: The present invention relates to a process for the production of a polyurethane lens, which comprises the step (a) of providing a polyisocyanate compound and two or more polythiol compounds which have different reaction rates with the polyisocyanate compound and adding an alkyltin halide compound to the above polyisocyanate compound, and, after the step (a), the step (b) of mixing the polyisocyanate compound and the two or more polythiol compounds together with the alkyltin halide compound of the general formula (I) to allow them to react, and obtaining a polyurethane lens.

Abstract: An electrodepositable composition is provided comprising: a non-gelled, cationic, water-dispersible resin, electrodepositable on a cathode, which is derived from a polyepoxide and which contains in the resin molecule cationic salt groups, beta-hydroxy ester groups, active hydrogen groups including free phenolic hydroxyl groups, and capped isocyanate groups. The composition provides excellent corrosion resistance when electrodeposited over steel substrates, and does not require lead in the formulation nor the use of a conventional chrome rinse for the steel substrate during pretreatment before electrodeposition.

Abstract: Low-viscosity (cyclo)-aliphatic polyamines containing urea groups and having more than two amino groups may be prepared by reacting (cyclo)aliphatic diamines with polyisocyanates containing isocyanurate groups or biuret groups. Such polyamines are useful as components in PUR reaction finishes and coating and adhesive compositions.

Abstract: The invention relates to a thermoreversible process for the preparation of a hydantoin comprisng(a) reacting an unsaturated polyester with a monofunctional amine to yield a poly(ester aspartate), and(b) reacting said poly(ester aspartate) with an isocyanate to produce a poly(ester urea), and(c) heating said poly(ester urea) to form a hydantoin compound.The process is useful for the preparation of coatings.

Abstract: A self-emulsifiable polyisocyanate mixture having a hexamethylene diisocyanate monomer content of not more than 1.0% by weight and an average NCO functionality of 2.0 to 3.7 obtained by subjecting hexamethylene diisocyanate to urethanation with a branched dihydric alcohol having overall 4 to 35 carbon atoms, of which 2 to 33 carbon atoms are a total number of the carbon atoms possessed by one or more branches, a hydrophilic surfactant having one or more active hydrogen atoms capable of reacting with NCO group and 3 to 90 alkylene oxide units, an aliphatic compound having one or more active hydrogen atoms capable of reacting with NCO group and 8 or more carbon atoms and an unbranched glycol having 1 to 10 carbon atoms; uretdione-forming reaction; and isocyanurate-forming reaction.

Abstract: A process for the preparation of coatings using a coating composition having a binder containing a two-component system of a) a polyisocyanate component and b) an isocyanate-reactive component b) which is essentially free from hydroxyl groups and contains b1) 5 to 95 parts by weight of a polyamine containing ester groups and secondary amino groups and b2) 5 to 95 parts by weight of polyketimines.

Abstract: (Cyclo)aliphatic polyisocyanates are provided which are completely or partially blocked with malonic esters, the malonic ester containing at least one tert-butyl group. The blocked polyisocyanates may be deblocked at a reduced temperature.

Abstract: An elastomer composition, resistant to hydrocarbon fluid and water absorption, comprisinga) an isocyanate reactive component comprising a polypropylene ether polyol containing from about 5 percent to about 60 percent of a dispersion comprising a condensation or addition polymer,b) from about 5 percent to about 35 percent of an epoxy resin, andc) a polyurethane formed from said polypropylene ether polyol, having active hydrogen atoms and at least one isocyanate component in the presence of said dispersion and said epoxy resin,said polyurethane having an isocyanate index of less than 100, said elastomer composition exhibiting less than about 20 percent weight gain after being immersed in kerosene for 24 hours at 38.degree. C.

Abstract: The present invention relates to polyaddition compounds that are solid below 40.degree. C. and liquid above 125.degree. C. and contain, based on the weight of the polyaddition compounds,a) 0 to 2% by weight of free isocyanate groups (calculated as NCO; molecular weight=42),b) 3 to 16% by weight of uretdione groups (calculated as C.sub.2 N.sub.2 O.sub.2 ; molecular weight=84),c) 10 to 22% by weight of urethane groups (calculated as --NH--CO--O--; molecular weight=59).d) 0 to 20% by weight of carboxylic add ester groups (calculated as CO--O--; molecular weight=44) ande) of 0 to 25% by weight of carbonate groups (calculated as --O--CO--O--; molecular weight=60),provided that the total content of carboxylic add ester groups and carbonate groups is at least 1% by weight.

Abstract: Described herein is a one-part hot melt adhesive comprising the reaction product of: (a) a polyester polyol with an equivalent weight in the range of from about 250 to about 3,000; (b) a polyisocyanate; and (c) at least about 1 weight percent hydroquinone bis (2-hydroxyethyl) ether; wherein the isocyanate content of the resulting product is at least about 0.5 percent. Also described is a one-part hot melt adhesive comprising the reaction product of: (a) a polyether polyol; (b) a polyisocyanate; and (c) hydroquinone bis (2-hydroxyethyl) ether; wherein the isocyanate content of the resulting product is at least about 0.5 percent. It has been discovered that the compositions of the invention provide adhesives with increased resistance to softening at high temperatures (e.g., above about 70.degree. C.) after curing.

Abstract: This invention discloses an aliphatic spray polyurea elastomer comprising an (A) component that includes an aliphatic isocyanate and a (B) component that includes (1) an amine-terminated polyoxyalkylene polyol and (2) a cycloaliphatic diamine chain extender, wherein between about 20% to about 80% of the primary amines have been converted into secondary amines.

Abstract: Azo dyestuff- and urethane-containing polyadducts comprising(a) at least one organic polyisocyanate,(b) at least one diol of a heterocyclic azo dyestuff,and if desired(c) one or more compounds having at least two groups reactive to NCO, which have an average molecular weight M.sub.n of up to 500 g/mol, and/or(d) one or more polyhydroxy compounds having average molecular weights M.sub.n of from over 500 up to 5000 g/mol.These polyadducts are suitable for applications in nonlinear optics.

Abstract: Compounds containing a ureido group which are useful in preparing dispersions of polymers having good wet adhesion properties and low volatility. Compounds having the formula: ##STR1## where R.sup.1 is H or an alkyl group, R.sup.2 is alkylene optionally interrupted with one or more ether oxygen atoms and A is H or a residue of an active hydrogen reactive compound are useful for incorporating ureido and optionally nitrile functionality into polymers and as precursors to amino compounds prepared by reduction of the nitrile group thereof. Compounds having the formula: ##STR2## where B is defined as for A and the same or different than A are also disclosed. The disclosed compounds have use as chain extending or terminating monomers for polyurethane dispersions when one or both of A and B are H and, when one of A and has ethylenic unsaturation, as wet adhesion monomers in dispersions of free radically polymerized polymers of unsaturated monomers.

Abstract: The invention relates to salts of pyromellitic acid which comprise 1 mol of pyromellitic acid and 0.5 to 2 mol of a guanidine of the following composition: ##STR1## in which R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different radicals from the group consisting of hydrogen, alkyl, cycloalkyl and aromatic hydrocarbon residues having 1 to 8 carbon atoms, and R.sup.1 and R.sup.2 and R.sup.3 and R.sup.4 may form a joint ring which may contain an oxygen atom as heteroatom. Also claimed are the preparation of the salts and their use for matt epoxide and hybrid powder coatings.

Abstract: An adhesive material is provided which is particularly suitable for potting a sensing element within a container. The adhesive material is characterized by mechanical and physical properties which enable the adhesive material to maintain its adhesive and structural integrity under intense thermal cycling conditions, so as to exclude foreign elements from the sensing element when potted within a container with the potting material. The adhesive material can be formulated so as to be sufficiently adherent for use with containers formed from materials such as polybutylene terephthalate, polyethylene terephthalate, and E-coated steel, by including additions of a flexibilized polyol/polyepoxide epoxy novolac in an amount of up to about 15 parts by weight.

Abstract: A polyimide obtained by reacting an acid dianhydride such as catechol bistrimellitate dianhydride, bisphenol A bistrimellitate dianhydride, etc. with a diamine such as 4,4'-diamino-3,3',5,5'-tetraisopropyl-diphenylmethane, etc. has high solubility in organic solvents and good moldability at low temperatures, and can provide a thermosetting resin composition together with a polymaleimide.

Abstract: A process for preparing liquid lacquer polyisocyanates with aliphatically and aromatically bound isocyanate groups and an NCO content of 5 to 25 wt. % by trimerizing an isocyanate component A), containing A1) 70 to 100 wt. % of diisocyanatotoluene and A2) 0 to 30 wt. % of other aromatic isocyanates and B) aliphatic lacquer polyisocyanates, optionally with prior, simultaneous and/or subsequent reaction of a portion of the isocyanate groups with an alcohol component C) having a molecular weight of 32 to 900, and optionally in the presence of D) inert solvents; the resulting lacquer polyisocyanates; and their use in coating compositions, in particular as a cross-linking agent for polyhydroxyl compounds in two-component polyurethane coating compositions.

Abstract: The invention is the process for binding two substrates together using a two-part adhesive comprising as a first part:A. a polyurethane prepolymer having reactive isocyanate moieties;and a second partB. a curative composition comprisingi) a polyurea, comprising the reaction product of a polyamine and a polyisocyanate, dispersed in a polyether polyol-based polyurethane prepolymer having reactive hydroxyl moieties, and optionally a plasticizer;ii) a compound having at least one oxazolidine moiety capable of reacting with an isocyanate under curing conditions; andiii) a catalyst capable of catalyzing the reaction of isocyanate and hydroxyl moieties in the presence of moisture.

Abstract: The present invention relates to a crosslinkable polyester/isocyanate composition suitable for preparing composite manufactured articles endowed with high structural mechanical properties, by means of injection processes, comprising:A--a polyfunctional isocyanate;B--an unsaturated polyester resin, or a vinyl ester resin, or a mixture of both said resins, wherein said resin can contain free hydroxy groups;C--a free-radical polymerization initiator;D--a promoter of decomposition of (C) initiator;E--a catalyst of (A) isocyanate trimerization.

Abstract: Polyisocyanate polyaddition products which are solid below 40.degree. C. and liquid above 125.degree. C., contain uretdione and urethane groups and have a content of at least 1 wt. % of urethane groups obtained from the reaction of dimeric diols with isocyanate groups; a method of producing the these products by the reaction of polyisocyanates containing uretdione groups with dimeric diols; and the use of these polyaddition compounds as the starting component in the manufacture of polyurethane plastics, particularly as the cross-linking component in thermally cross-linkable two-component polyurethane powder coating compositions.

Abstract: The present invention provides compositions and method of using an aldimine oxazolidine compound having the formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are, individually, a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, a straight chain or branched chain alkyl or alkanol group, a cycloalkyl group, or an aryl group, including any of the above groups substituted by nitro, halogen, thiol and amino functional groups, such that when R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are hydrogen atoms, R.sub.3 and R.sub.4 are not hydrogen atoms, further, R.sub.7 and R.sub.

Abstract: An amide group-containing epoxy resin obtained by reacting an epoxy resin with an amide group-containing diisocyanate obtained by reacting a diisocyanate with a dicarboxylic acid gives a uniform cured article showing high adhesiveness and is usable as an adhesive, a coating composition, and the like.

Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an epoxidized ester (b). The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above. In another aspect of the invention, the invention provides methods of using the claimed compositions as well as the rigid cellular polyurethane SRIM articles resulting from such processes.

Abstract: A polyurethane and/or polyurethane urea elastomer in the form of a thermostable processable melt, which is immediately processable or which, after cooling and storing, can be remelted and processed. The elastomer is produced by a polyaddition or build-up reaction of longer chain diols with diisocyanate, chain extenders and a polar gelling and/or melting aid for the formation of the thermostable processable melt. A method for manufacturing a polyurethane and/or polyurethane-urea elastomer in the form of a thermally stable processable melt which may be processed immediately or after cooling and storage, being remeltable and reprocessable. The method comprises the steps of: converting n-Mol of a polymeric diol to form a prepolymer with about 1.1 to about 10.0 n-Mol of a diisocyanate at about 50.degree. C. to about 150.degree. C.

Abstract: The compositions of the invention are hot melt urethane compositions for application in the molten star at temperatures of from about 121.1.degree.-232.2.degree. C. having viscosities of less than 50,000 cps which upon cooling form an elastomeric solid.

Abstract: Star polymers of soft segment forming monomers are useful in forming surgical devices. The star polymers can be endcapped with isocyanate, mixed with a filler and/or cross-linked. The polymer compositions are useful, for example, as fiber coatings, surgical adhesives or bone putty, or tissue growth substrate.

Abstract: The present invention is directed to a polyisocyanate mixturei) having an NCO content of 5 to 35% by weight and prepared from an organic diisocyanate,ii) containing at least 1% by weight of isocyanurate groups (calculated as N.sub.3, C.sub.3, O.sub.3, MW 126),iii) containing allophanate groups in an amount such that there are more equivalents of allophanate groups than urethane groups andiv) containing fluorine (calculated as F, AW 19) in an amount of 0.

Abstract: A thermosetting resin composition which comprises (A) a resin in which at least one compound having a graft-reactive group such as a carboxyl group, a primary amino group or a secondary amino group and a carboxylic anhydride group has been grafted on a polycarbodiimide and (B) an epoxy compound. The said thermosetting resin composition retains heat resistance, electrically insulating properties and mechanical properties characteristic of polycarbodiimide, is excellent in solubility in various solvents and storage stability in the form of a solution and can be easily cured under mild conditions, and can produce a cured product excellent in humidity resistance, transparency, chemical stability and adhesiveness to various substrates.

Abstract: The present invention is directed to a polyisocyanate mixturei) having an NCO content of 5 to 35% by weight and prepared from an organic diisocyanate,ii) containing up to 25% by weight of isocyanurate groups (calculated as N.sub.3, C.sub.3, O.sub.3, MW 126),iii) containing allophanate groups in an amount such that there are more equivalents of allophanate groups than urethane or urea groups and such that the polyisocyanate mixture remains stable and homogeneous in storage for 3 months at 25.degree. C. andiv) containing siloxane groups (calculated as SiO, MW 44) in an amount of 0.002 to 50% by weight,wherein the preceding percentages are based on the solids content of the polyisocyanate mixture, excluding any unreacted organic diisocyanate, and wherein the siloxane groups are incorporated by reacting an isocyanate group with a compound containing one isocyanate-reactive group directly attached to a carbon atom and one or more siloxane groups.

Abstract: An impact-resistant composition is disclosed, comprising(A) a modified polyisocyanate in which the active isocyanate groups have been blocked, obtained from a polycaprolactone-modified diol and an isocyanate compound, and(B) a hydroxyl group-containing resin containing two or more hydroxyl groups per molecule. The composition is useful as a coating composition for forming a chipping-resistant coated film.

Abstract: The invention describes anisotropic polymers of diepoxide A having the formula (I) ##STR1## and anisotropic polymers of diisocyanate B having the formulas (II) to (VII) ##STR2## where as defined in the specification.

Abstract: A curing agent for epoxy resins is prepared from an amine and an epoxy, as well as subsequent modification by a polyisocyanate compound, in such a manner that the curing agent is in the form of small spherical particles. The particles can be as small as 0.1 microns. This curing agent can be easily dispersed in curing agent masterbatches and curable compositions with minimal effect on their storage stability. The resulting curable compositions have a wide range of applications, including automobile and electronic adhesives.

Abstract: Polymeric, catalytically active compounds comprising polymer chains to which imidazole groups are linked terminally or laterally are used as catalysts for the dimerization of isocyanates.

Abstract: The invention relates to a process for the solventless production of elastic filaments based on segmented poly(urethane)s or poly(urethane urea)s having improved thermal properties and, hence, improved processing behavior, for example during the heat setting of fabrics containing the elastic fibers, by the use of a polyisocyanate containing isocyanurate groups in the reaction of long-chain, relatively high molecular weight polyhydroxyl compounds with organic diisocyanates and low molecular weight diols and, optionally, other auxiliaries and additives in the melt, direct spinning of the reaction mixture thus obtained and thermal aftertreatment of the elastic filaments obtained and also to the filaments obtainable by this process.

Abstract: The present invention relates to blocked polyisocyanates containing at least one isocyanate group which is reversibly blocked with a monofunctional blocking agent for isocyanate groups and at least one isocyanate group in the form of a thermally stable hydantoin group. The present invention also relates to one-component coating compositions containing these blocked polyisocyanates and compounds containing isocyanate-reactive groups.

Abstract: A coating composition including a first component comprising a compound having appended thereto more than one carbamate functional group, and further including a second component reactive with said carbamate groups, which is a substituted acrylamide compound. The composition is useful as a clearcoating composition in a color-plus-clear composite coating.