Abstract: Unsymmetrical polyurethane polyol prepolymers are disclosed for use in the formation of coating compositions. The prepolymers are prepared as a reaction product of a diisocyanate with a short chain aliphatic diol and a long chain polymeric diol. The prepolymers are intended as the first component for reaction with a second component polyisocyanate in a two-component coating composition. The coating compositions exhibit excellent abrasion resistance and weatherability, and are particularly useful as coatings for polymeric window transparencies.

Abstract: A powder coating composition comprising (A) at least one hydroxyl functional polyurethane resin binder, and (B) at least one polyurethane resin as cross-linking agent containing blocked isocyanate groups, wherein the at least one hydroxyl functional polyurethane resin binder (A) and the at least one polyurethane resin (B) both having a melting temperature of 60 to 180° C., in particular, 80 to 160° C.; the powder coating composition makes it possible to achieve a low melt viscosity and an excellent processability along with a good storage stability and in particular, to form thin films of the coating layers having high flexibility in combination with an excellent weather resistance.

Abstract: The invention relates to high-reactivity polyurethane compositions. The invention further relates to low temperature curable polyurethane compositions which contain uretdione groups, particularly useful for polyurethane powder coating compositions and adhesive compositions, and to processes for preparing and using the same.

Abstract: The present invention relates to a process for preparing low-viscosity, allophanate-containing and NCO-free polyurethane prepolymers curable by actinic radiation, and to the products obtainable by this process. The prepolymers have residual monomer contents of less than 0.5% by weight and an NCO content of less than 1% by weight, and are prepared by a process in which A) diisocyanates, B) hydroxy-functional compounds containing groups which react with ethylenically unsaturated compounds on exposure to actinic radiation, and C) polyester, polyether or polycarbonate polyols having a functionality of at least 1.

Abstract: Disclosed is a method of making reduced VOC polymers and coating compositions containing such polymers. Provided is a mixture (I) comprising a reactant mixture (a) of polymerizable components and a nonvolatile solvent (bnv) that (i) is not a crystalline solid at 25° C., (ii) is nonvolatile, (iii) comprises at least one functional group (F1) and (iv) is a fluid solid. Reactant mixture (a) is polymerized to provide a polymer (a?). The at least one functional group (F1) of nonvolatile solvent (bnv) is reacted with one or more reactants (e) to obtain a nonvolatile solvent (b?nv) comprising at least two functional groups (F2). Obtained is a mixture (II) comprising polymer (a?) in nonvolatile solvent (b?nv) comprising at least two functional groups (F2). The at least one functional group (F1) is substantially nonreactive: (1) with the components of reactive mixture (a), (2) under the polymerization conditions which polymerize reactant mixture (a), and (3) with polymer (a?).

Abstract: A composition for and method for bonding a substrate. In general, applied to a substrate will be a primer composition that includes an adhesion promoter, which is an adduct prepared by the reaction of at least one aromatic polyisocyanate compound, with an active hydrogen containing moiety of an organofunctional silane, and a prepolymer derived from the reaction of at least one aliphatic polyisocyanate and a polyol, and is at least partially reacted with an active hydrogen containing moiety of an organofunctional silane.

Abstract: The present invention relates to the preparation of aqueous, solvent-free or low-solvent, storage-stable polyurethane crosslinker dispersions having pyrazole-blocked isocyanate groups, to coating compositions prepared from them and to their use in coatings.

Abstract: The invention relates to a process for preparing binders which contain 1) allophanate groups, 2) groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups) and 3) optionally NCO-reactive groups, by reacting at temperatures ?130° C. A) one or more NCO-functional compounds containing uretdione groups with B) one or more compounds that contain isocyanate-reactive groups and groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups), and then C) with one or more saturated, hydroxyl-containing compounds other than B), at least one of these compounds having an OH functionality of ?2, in the presence of D) a catalyst containing one or more ammonium salts or phosphonium salts of aliphatic or cycloaliphatic carboxylic acids, the reaction with compounds C) taking place at least proportionally with the formation of allophanate groups.

Abstract: There is provided a two-pack composition for making urethane-containing structures, said composition comprising (a) a first pack comprising at least one reaction product of at least one polyisocyanate and at least one polyol, wherein said first pack has %NCO of 6% or greater, and (b) a second pack comprising at least one polyol and at least one amine catalyst, wherein the reactive mixture formed by admixing said first pack and said second pack is capable of curing in the absence of water; and wherein said reactive mixture comprises less than 3% solvent by weight based on the weight of said reactive mixture. Also provided are methods of making such urethane-containing structures, and the urethane structures made thereby.

Abstract: Organopolysiloxaneurea polymers with good melt viscosity but which effectively crosslink in the presence of moisture contain alkylalkoxysilane or alkylaminoalkylalkoxysilane groups pendant to the polymer chain. The polymers are useful as non-creeping hot melt adhesives, and for other uses as well.

Abstract: Modified stable polyisocyanates are described having at least one isocyanate function modified by a group having cross-linking functionality.

Abstract: A polysiloxane prepolymer that is useful for forming biomedical devices has the formula: M(*Dii*PS)x*Dii*M??(I) wherein: each M is independently a polymerizable ethylenically unsaturated radical; each Dii is independently a diradical residue of a diisocyanate; each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine; each * is independently —NH—CO—NH—, —NH—COO— or —OCO—NH—; and x is at least 2.

Abstract: To provide an oil repellent copolymer capable of forming an oil repellent film which is excellent in durability. An oil repellent copolymer characterized by comprising a repeating unit (A) having a polyfluoroalkyl group, a repeating unit (B) having a fluorescent functional group, and a repeating unit (C) having an ester bond other than an ester bond derived from acrylic acid, and/or a hydroxyl group.

Abstract: A novel method of preparing an aqueous dispersion of non-uniform polyurethane particles which comprises (a) preparing at least two isocyanate-terminated polyurethane prepolymers having different hydrophilicities; (b) preparing a uniform mixture of said prepolymers; and (c) dispersing the mixed prepolymers in an aqueous medium. The resulting dispersion of the prepolymers may optionally be chain extended. This method enables the preparation of core-shell particles as well as particles of other morphologies, including “raspberry”, interpenetrating network, “salt-and-pepper”, “ice-cream cone” and particles of gradient composition. Similarly, an aqueous dispersion of two different polyurethane polymers may be obtained by first preparing at least two different isocyanate-terminated polyurethane prepolymers, preparing a uniform mixture of such prepolymers and thereafter dispersing the mixture in an aqueous medium.

Abstract: A highly reactive polyurethane powder coating composition, which contains uretdione groups that are hardenable at low temperatures, contains A) at least one uretdione-containing powder coating hardener based on aliphatic, (cyclo)aliphatic or cycloaliphatic polyisocyanates and hydroxyl-containing compounds, the hardener having a melting point of from 40 to 130° C., a free NCO content of less than 5% by weight, and a uretdione content of 6-18% by weight; B) at least one hydroxyl-containing polymer having a melting point of from 40 to 130° C., and an OH number of between 20 and 200 mg KOH/g; C) 0.001-3% by weight of at least one tetraalkyl ammonium carboxylate catalyst, based on a total amount of components A) and B). Components A) and B) are present in a ratio so that for each hydroxyl group of component B) there is from 0.3 to 1 uretdione group of component A).

Abstract: An organic polyisocyanate with at least one unsaturated functional group is capable of copolymerizing when exposed to actinic radiation. The polyisocyanate comprises structural units with the formula (1): wherein: X is an electron-attracting group; R1, and R2 are hydrogen atoms, a saturated or unsaturated aliphatic or cycloaliphatic radical, or an aromatic or araliphatic radical; and n is an integer from 0 to 5. A process for producing this polyisocyanate is also disclosed.

Abstract: The present invention relates to inner coatings of metal food containers and packaging and to a process for their production. The coatings are applied to the inside of at least a portion of the surface area of containers that are in direct contact with foods or other consumable products and subsequently cured. The coatings include a) at least one polyisocyanate containing an average of at least two NCO groups per molecule, at least 95% of the NCO groups being blocked with a blocking agent, and b) at least one polyhydroxyl compound containing an average of at least two hydroxyl groups per molecule that react with NCO groups.

Abstract: The present invention provides elastic polyurethane yarns which possess excellent elongation, recoverability, heat resistance and chemical resistance, as well as a method of manufacturing the same. The elastic polyurethane yarns comprise a polyurethane being composed mainly of a polymeric diol and a diisocyanate, and contains through incorporation a compound having within the molecule a phosphorus-nitrogen interatomic bond(s). The process can produce the elastic polyurethane yarns by adding to a solution of the polyurethane a compound having within the molecule a phosphorus-nitrogen interatomic bond(s), followed by spinning.

Abstract: The present invention is directed to polymeric compositions comprising a biodegradable copolymer that possesses shape-memory properties and implantable devices (e.g., drug-delivery stents) formed of materials (e.g., a coating) containing such compositions. The polymeric compositions can also contain at least one non-fouling moiety, at least additional biocompatible polymer, at least one biobeneficial material, at least one bioactive agent, or a combination thereof. The polymeric compositions are formulated to possess good mechanical, physical and biological properties. Moreover, implantable devices formed of materials comprising such compositions can be delivered to the treatment site in a conveniently compressed size and then can expand to dimensions appropriate for their medical functions.

Abstract: Low-temperature-curable polyurethane compositions with uretdione groups, containing polymers based on polyols that carry secondary OH groups.

Abstract: The present invention provides a nanocapsule of a blocked isocyanate encapsulated within a polymeric nanosphere. In one aspect, the polymeric nanosphere is functionalized. Free isocyanate functionality is released upon thermal annealing or UV exposure of the nanospheres containing the blocked isocyanate. This present invention also provides a novel method for encapsulating isocyanates in aqueous media. In one aspect, the method comprises miniemulsion polymerization. The thermally or UV deblocked isocyanate can be used as an active functional group for many potential applications.

Abstract: The invention relates to metal-free one-component polyurethane systems.

Abstract: Compositions useful in circuitry substrates are described which have a polyimide component, and a sterically hindered hydrophobic epoxy component. Generally, a flowable precursor is applied and then cured to a wholly or partially solidified mass. The invention is also directed to methods of forming a passive electrical component upon or into a circuit board.

Abstract: A telecommunication element having a durable color identifying polymeric coating thereon is disclosed. The telecommunication element comprises an elongated communication transmission medium, such as an optical fiber or an optical fiber ribbon, and a radiation cured polymeric coating having an identifying color applied on at least a portion of the transmission medium. The identifying color in the polymeric coating is provided by chromophore molecules that are covalently bonded thereto. Coating compositions and a method are also disclosed.

Abstract: An AED coating composition comprising, apart from water, (A) 1 to 20, relative to the resin solids content of the composition, of at least one resin with functional groups selected from the group consisting of hydroxyl groups, free isocyanate groups and blocked isocyanate groups, the resin is present as particles with melting temperatures from 40 to 200° C., (B) at least one film-forming, self- or externally cross-linking AED binder different from resin (A), and (C) optionally, at least one component selected from the group consisting of cross-linking agents, paste resins, grinding resins, nonionic resins, fillers, pigments, fillers, extenders, coating additives and organic solvents; the AED coating compositions have a distinctly reduced or no edge migration behavior upon deposition and baking.

Abstract: A powder coating composition comprising (A) at least one hydroxyl functional polyurethane resin binder, and (B) at least one polyurethane resin as cross-linking agent containing blocked isocyanate groups, wherein the at least one hydroxyl functional polyurethane resin binder (A) and the at least one polyurethane resin (B) both having a melting temperature of 60 to 180° C., in particular, 80 to 160° C.; the powder coating composition makes it possible to achieve a low melt viscosity and an excellent processability along with a good storage stability and in particular, to form thin films of the coating layers having high flexibility in combination with an excellent weather resistance.

Abstract: The present invention provides a process for preparing aqueous solutions of NCO group blocked resins having polyimide structures and optionally, polyamide structures. The process comprises the steps of preparing a polymer from at least one polyisocyanate, at least one tricarboxylic monoanhydride and/or at least one tetracarboxylic anhydride, and optionally, tricarboxylic acids, tetracarboxylic acids and/or dicarboxylic acids, at least one NH-functional lactam and/or 3,5-dimethylpyrazole and/or butanone oxime. The reaction mixture is subsequently reacted with a base, and the resulting resin is dissolved in water. The resins provide high-grade, highly flexible coatings having the excellent properties and chemical resistance typical of polyamideimides.

Abstract: Thermally curate resin composition, having shrink-controlled properties and being suitable for use in sheet moulding compounds and bulk moulding compounds (SMCs and BMCs) comprising, inter alia (a) an unsaturated polyester; (b) an alkenyl aromatic monomer; (c) a low profile additive; (d) a peroxide initiator; (e) a thickening agent; (f) fibrous reinforcement material; and optionally one or more components selected from the group of (g) mould release agents; (h) wetting and viscosity reducing agents; and (i) fillers, wherein the composition also comprises a uret dione diisocyanate, in an amount of at least 0.2-1.0% by weight relative to the total weight of components (a), (b) and (c) of the resin composition. The resin compositions according to the invention in particular have a low emission of volatile organic compounds (VOC). More particularly, the resin compositions have excellent Class A properties.

Abstract: In order to provide a water-based coating composition for surface treatment of metallic materials having excellent chemical resistance, corrosion resistance, solvent resistance and adhesion, a cationic aqueous urethane resin (F) is prepared, which is obtained by chain-elongation of a cationic urethane prepolymer (D) using water or a polyamine compound (E), the cationic urethane prepolymer (D) being formed by neutralized a tertiary amino group by an acid or quaternarized the tertiary amino group by quaternarizing agent, the tertiary amino group being included in a urethane prepolymer comprising, as components thereof, a compound (A) having two or more active hydrogen atoms, an organic polyisocyanate (B), and a chain elongation agent (C) having the tertiary amino group.

Abstract: The present invention is directed to blocked biuret group-containing polyisocyanate compositions, wherein the blocking agent is of the formula: wherein R1, R2, R3 and R4 may be the same or different and represent a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl, R5 represents a moiety selected from the group consisting of C1-C10-alkyl and C3-C10-cycloalkyl, and B is a group according to one of the following structural formulas wherein each occurrence of R6, R7, and R8 may be the same or different and represent a moiety selected from the group consisting of C1-C6-alkyl and C3-C6-cycloalkyl and R9 is a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl.

Abstract: Disclosed is a polycondensation product comprising A) an aromatic or heteroaromatic compound containing 5 to 10 C atoms or heteroatoms, said compound being provided with an average of 1 to 300 oxyethylene groups and/or oxypropylene groups per molecule which are linked to the aromatic or heteroaromatic compound via an O atom or N atom, and optionally B) an aromatic compound selected among the group comprising phenols, phenol ether, naphthols, naphthol ether, anilines, furfuryl alcohols, and/or an aminoplast former selected among the group comprising melamine (derivatives), urea (derivatives), and carboxylic acid amides, and C) an aldehyde selected among the group comprising formaldehyde, glyoxylic acid, and benzaldehyde or mixtures thereof, the benzaldehyde optionally containing acid groups in the form of COOMa, SO3Ma, and PO3Ma, wherein M=H, akali metal or alkaline earth metal, ammonium, or organic amine radicals and a=½, 1, or 2.

Abstract: A composition based on water and/or organic solvents and their use as a finish on flat materials, comprising (1) 10-90% of a hydrophobic wax based component, (2) 10-90% of a hydrophobic reaction product prepared by reacting a component (A) with a partially blocked or non-blocked di-, tri- or polyisocyanate and (3) ?0-45% by weight of a blocked or non-blocked di-, tri- or polyisocyanate and (4) optionally, an emulsifier. When used as a finish on flat materials, the composition can endow the treated flat materials with durable hydrophobic properties.

Abstract: Disclosed is a method of making reduced VOC polymers and coating compositions containing such polymers. Provided is a mixture (I) comprising a reactant mixture (a) of polymerizable components and a nonvolatile solvent (bnv) that (i) is not a crystalline solid at 25° C., (ii) is nonvolatile, (iii) comprises at least one functional group (F1) and (iv) is a fluid solid. Reactant mixture (a) is polymerized to provide a polymer (a?). The at least one functional group (F1) of nonvolatile solvent (bnv) is reacted with one or more reactants (e) to obtain a nonvolatile solvent (b?nv) comprising at least two functional groups (F2). Obtained is a mixture (II) comprising polymer (a?) in nonvolatile solvent (b?nv) comprising at least two functional groups (F2). The at least one functional group (F1) is substantially nonreactive: (1) with the components of reactive mixture (a), (2) under the polymerization conditions which polymerize reactant mixture (a), and (3) with polymer (a?).

Abstract: A high-reactivity liquid polyurethane composition which contains at least one uretdione group and cures at a low baking temperature can be used for producing plastics, particularly surface coatings and adhesives. The polyurethane composition contains A) at least one curing agent which contains at least one uretdione group and is obtained from i) an aliphatic polyisocyanate, a (cyclo)aliphatic polyisocyanate, a cycloaliphatic polyisocyanate or mixtures thereof, and ii) at least one hydroxyl-containing compound, the curing agent having a free NCO content of less than 5% by weight and a uretdione content of from 1 to 18% by weight; and B) at least one catalyst.

Abstract: Polyurethane powder coating compositions based on epoxy-terminated polyaddition compounds having uretdione groups, which cure at low baking temperatures, a process for preparing such compositions, and their use for producing plastics, especially polyurethane powder coatings, which crosslink at low baking temperatures to give high-gloss or matt, light-stable and weather-stable coating films.

Abstract: A method is described for preparing a tricondensate polyfunctional isocyanate composition, preferably having at least an isocyanurate and/or biuret group, which includes adding to a tricondensate polyfunctional isocyanate, or a mixture of different tricondensate polyfunctional isocyantes, obtained by (cyclo)condensation, in particular (cyclo)trimerization of one or several identical or different isocyanate monomers and optionally of another monomer, an allophanate of one or several identical or different isocyanates, or a mixture of different allophanates. The isocyanates or isocyanate monomer mixtures used for preparing the polyfunctional isocyanate(s) may be identical to or different from the isocyanate(s) or isocyanate mixture used for preparing the allophanate(s).

Abstract: The present invention is directed to a method of forming a golf ball that contains an interpenetrating polymer network, or IPN, which includes at least two polymeric systems, in one or more of the layers. The first polymeric system may include a polyurethane-based or polyurea-based system having blocked isocyanate groups and the second polymeric system may include an epoxy-based or acrylic-based system, wherein the two systems are polymerized or cured simultaneously or sequentially to form an IPN.

Abstract: In one aspect, the invention relates to storage-stable and flowable polyurethane compositions comprising (a) one or more isocyanate-terminated polyurethane prepolymers derived from one or more hydrocarbon ring-containing diisocyanates and/or triisocyanates and one or more polyols; (b) one or more metal salt complexes of methylenedianiline; and (c) one or more organic acid halide compounds having one or more acid halide groups, wherein the one or more organic acid halide compounds are in an amount wherein the acid halide groups are present in a minimum concentration of about 100 parts per million by weight of the polyurethane prepolymer. In other aspects, the invention relates to methods for storing the curable polyurethane compositions, as well as methods for producing polyurethane elastomers.

Abstract: A polyisocyanate composition comprising an allophanate group, which is obtained from an aliphatic diisocyanate(s), wherein in a state substantially free of a solvent and the aliphatic diisocyanate(s), (i) the content of components having a molecular weight of 700 or less is 20-60 weight %, (ii) the ratio of weight average molecular weight to number average molecular weight is 1.20-5.00, (iii) the ratio of viscosity (unit: mPa·s) of the polyisocyanate composition at 25° C. to the number average number of functional groups of isocyanate groups is represented by the following expression: viscosity(mPa·s)/number average number of functional groups?240.

Abstract: A storage stable adhesive paste composition is described. It contains a plurality of first solid particles comprising a surface protected polyisocyanate and a plurality of second solid particles of polymer having functional groups that react with the polyisocyanate. The particles may be protected by encapsulation in a layer of a material that is not reactive to the polyisocyanate. Preferably, the protective layer also is not reactive to the polymer having functional groups that react with the polyisocyanate. The polyisocyanate particles also can be protected by a layer formed by chemically reacting said polyisocyanate particles with isocyanate reactive compounds to form a protective surface layer around said polyisocyanate particles.

Abstract: The present invention relates to new hydrophilicized blocked polyisocyanates, a process for preparing them and their use.

Abstract: Fluorochemical composition for rendering fibrous substrates oil repellent, water repellent, and/or stain or soil repellent. The composition comprises a dispersion or a solution of a fluorinated compound which comprises the reaction product of the following combination of reactants: (i) a fluorinated polyether according to the formula: Rf—Q—Tk ??(I) ?wherein Rf represents a monovalent perfluorinated polyether group having a molecular weight of at least 750 g/mol, Q represents a chemical bond or a divalent or trivalent organic linking group, T represents a functional group capable of reacting with an isocyanate and k is 1 or 2; (ii) an isocyanate component selected from a polyisocyanate compound that has at least 3 isocyanate groups or a mixture of polyisocyanate compounds wherein the average number of isocyanate groups per molecule is more than 2; and (iii) optionally one or more co-reactants capable of reacting with an isocyanate group.

Abstract: The present invention relates to novel polyesterpolyols with cyclic imide structure and to their use in coating compositions.

Abstract: A process for preparing high-functionality, highly branched polyureas comprises the steps a) reaction of an at least bifunctional capped diisocyanate or polyisocyanate with at least one at least bifunctional primary and/or secondary amine with elimination of the capping agent, b) intramolecular reaction of the reaction product from step a) to form a high-functionality, highly branched polyurea.

Abstract: Sports equipment incorporate thermoplastic compositions including urethane and a nitroso reaction product of a nitroso compound and a diisocyanate or polyisocyanate. The invention on allows for the processing advantages of a thermoplastic urethane with the superior performance characteristics of a cross-linked polyurethane.

Abstract: The invention concerns a polyisocyanate composition having high functionality, obtained by polycondensation of diisocyanate or triisocyanate monomers, comprising: (a) 0.5 to 30 wt % of compounds bearing a single uretidinedione function; (b) 0.5 to 45 wt. % of compounds bearing a single isocyanurate function; (c) at least 40 wt. % of a mixture of polyisocyanate compounds having a molecular weight not less than three times the average molecular weight of the isocyanate monomers having the smallest molecular weight and bearing at least two isocyanate functions, said mixture having a ratio of carbonyl functions belonging to a uretidinedione cycle/carbonyl functions belonging to an isocyanate cycle+carbonyl functions belonging to a uretidinedione cycle not less than 4%; (d) 0 to 25 wt. % of compounds bearing at least an isocyanate function other than (a), (b) and (c); and (e) 0 to 10% of impurities.

Abstract: The invention provides curable waterborne coating compositions comprising an aqueous dispersion (A) comprising an organic binder component (A1) comprising at least 5% by weight of a reactive component (a), based on the total weight of organic binder component (A1), and at least one crosslinking component (B). The reactive component (a) is substantially free of any heteratoms and is a not a crystalline solid at room temperature and comprises from (i) 12 to 72 carbon atoms, and (ii) at least two functional groups. The curable waterborne coating compositions of the invention show significantly improved pop resistance while also providing improved chip resistance, weathering resistance, flexibility, and/or scratch & mar resistance.

Abstract: A method of dimerizing isocyanates including reacting the isocyanates in the presence of phosphines containing at least one directly phosphorus-attached bicyclic, cycloaliphatic radical. The polyisocyanate compositions obtained as described above can be used in mouldings, coating materials, adhesives, sealants or adjuvants that further include the polyisocyanate compositions and one or more materials selected from antioxidants, light stabilizers, pigments, fillers, additives, levelling assistance, defoamers and matting agents. The coating materials, adhesives or sealants can be used to coat substrates.

Abstract: The present invention relates to novel polyesterpolyols with cyclic imide and isocyanurate structure and to their use in coating compositions.

Abstract: The present invention relates to novel polyurethane prepolymers (PU prepolymers) of low viscosity containing NCO groups blocked with compounds containing phenol groups and to their use for producing polyurethane polymers. The PU prepolymers are prepared by reacting one or more diisocyanates or polyisocyanates with at least one isocyanate-reactive compound with a functionality of at least 1.5 to form an NCO-functional polyurethane prepolymer and subsequently blocking the free NCO groups with at least one hydrocarbon resin containing phenolic OH groups and/or one optionally substituted phenol in the presence of a catalyst which comprises at least one triorganoamine.

Abstract: Alignment in X-ray lithography is generally effected in such a manner that the surface of a target mark for alignment formed on a wafer is illuminated with light for alignment through an X-ray mask, and the position of the wafer is detected from the reflected light. On the basis of the finding that the reflected light from the mask, particularly from an absorber formed thereon, greatly degrades the precision and reliability in measurement, the present invention provides a pattern transfer mask provided with a thin film which lowers the reflection factor of the mask the thin film having a thickness set a .lambda./4n (.lambda.:the wavelength of the light for alignment; n: an integer) or an odd-number multiple thereof. Thus, it is advantageously possible to overcome the above-described lowering of precision and reliablity.