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| Number | Title | Issue Date |
| 5138000 | Curable compositions based on aromatic bismaleimides Curable compositions comprising (a) an aromatic bismaleimide of formula ##STR1## wherein R1 and R2 are identical or different and each is C1 -C4 alkyl, and R3 and R4 are each independently... | 08/11/1992 |
| 5104918 | Perylenetetracarboxylic acid diimides having long-chain radicals containing carbonyl groups Perylene-3,4,9,10-tetracarboxylic acid diimides of the formula I ##STR1## in which R is a linear or branched alkylene, alkylenecycloalkylene or cycloalkylenealkylene radical which has at least 15 C atoms and which is interrupted by one or two --COO--... | 04/14/1992 |
| 5104768 | Positive photoresist composition containing radiation sensitive quinonediazide compound and completely esterified polyamic acid polymer The invention relates to positive working photoresists for producing relief structures of high-temperature resistant polyimide prepolymers, which photoresists can be developed in aqueous-alkaline medium and which contain, in an organic solvent, essentiall... | 04/14/1992 |
| 5102927 | Polyolefines which have been stabilized with bis-(polyalkylpiperidinylamino 1,3,5-triazines or tris-(polyalkylpiperidinylamino)-1,3-5-triazines A particularly good stabilization against oxidative and light-induced degradation of polyolefines is obtained by adding compounds of the formula I ##STR1## in which R1 is not hydrogen.... | 04/07/1992 |
| 5102466 | Production of pigments The present invention provides a process for the production of a metallized azo pigment having the formula ##STR1## in which R and R1, independently, are hydrogen, halogen or alkyl; X1 is SO3.crclbar. or CO... | 04/07/1992 |
| 5102959 | Auto-photocrosslinkable copolyimides and polyimide compositions The present invention relates to copolyimides of 100-70 mol % of recurring structural units of the formula I and 0-30 mol % of recurring structural units of the formula II ##STR1## in which za is a tetravalent aromatic tetracarboxylic acid... | 04/07/1992 |
| 5095044 | Oligomeric benzil ketals and their use as photoinitiators Compounds of the formula I ##STR1## in which n is 1-30 and X, Y, R, Ar1 and Ar2 are as defined in claim 1 can be prepared by reaction of a benzil dialkyl ketal with a diol. Depending on the molar ratio of the two reaction compon... | 03/10/1992 |
| 5095056 | 2,9-dichloroquinacridone-pigmented engineering plastics and coatings The use of 2,9-dichloroquinacridone having a surface area below 30 m2 /g as a pigment in engineering plastics and coating wherein said pigment exhibits outstanding heat stability and a unique red color in the resulting pigmented system.... | 03/10/1992 |
| 5095122 | Diketopyrrolopyrrole pigments in platelet form Organic pigments selected from the diketopyrrolopyrrole, azo, isoindolinone and isoindoline series, which pigments consist of 50% by weight of platelets which are from 5 to 50 μm long, 2 to 50 μm wide and 0.01 to 5 μm thick, with the proviso that the r... | 03/10/1992 |
| 5091113 | Corrosion inhibiting composition R is a straight or branched chain C.sub.4 -C.sub.30 alkyl group, a straight or branched chain C.sub.4 -C.sub.30 alkyl group interrupted by one, two or three oxygen atoms or substituted by one, two or three hydroxy groups, a C.sub.5 -C.sub.12 cycloalkyl gr... | 02/25/1992 |
| 5091439 | Process for curing polyurethane coatings and compositions Compounds of the formula ##STR1## in which a is 1, 2, or 3, R1 is an uncharged, carbocyclic or heterocyclic aromatic ring, unsubstituted or substituted, R2 is an unsubstituted or substituted cyclopentadienyl or indenyl anion, an... | 02/25/1992 |
| 5086173 | Process for the preparation of alkylhydroxyanilinothiotriazine derivatives A process for the preparation of compounds of formula I ##STR1## wherein R1 and R2 are each independently of the other hydrogen, C1 -C12 alkyl, C5 -C6 cycloalkyl or phenyl, and R3... | 02/04/1992 |
| 5084195 | Lubricant composition comprising an allophanate extreme-pressure, anti-wear additive A composition comprising a) a lubricant or a hydraulic fluid and b) at least one compound of the general formula I ##STR1## in which x=1 or 2 and, if x=1, R is as defined for R1 or R3 -O- or, if x=2, R is as defined for R8 | 01/28/1992 |
| 5084573 | 2,9-dichloroquinacridone in platelet form 2,9-Dichloroquinacridone in platelet form having a length of 1-45 μm, a width of 0.1-20 μm and a thickness of 0.05-5 μm; a process for the preparation thereof comprising conversion of the crude material in a polar solvent in the presence of a long chai... | 01/28/1992 |
| 5084100 | Quinacridone dispersion milling process A dispersion milling process for reducing the particle size of quinacridone pigments wherein the quinacridone is milled in the presence of hydrated aluminum sulfate and, as a crystallizing solvent, a lower alkyl ester of a C2 -C10 di... | 01/28/1992 |
| 5082952 | Process for the preparation of metallocene complexes The invention relates to a process for the preparation of π-arene-iron complexes of the general formula I [R1 (R2 FeII)a ]b+a (LQm)-b (I) wherein a is 1 or 2, b is an integer f... | 01/21/1992 |
| 5079129 | Negative photoresist based on polyphenols and epoxy compounds or vinyl ethers The present invention relates to a negative photoresist consisting essentially of a) at least one solid film-forming polyphenol, b) at least one compound which contains at least two epoxide groups or at least two vinyl ether groups or at least one epoxide and ... | 01/07/1992 |
| 5077415 | Disubstituted aromatic dianhydrides Aromatic dianhydrides being substituted in the positions ortho to the bridging moiety, said substituent groups including halogen, alkyl, hydroxy, nitro, cyano, ester, alkoxy, perfluoroalkyl, mercapto and thioester groups, said dianhydrides providing certa... | 12/31/1991 |
| 5077173 | Positive photoresist containing 2,3,4-trihydroxybenzophenone and 1,2-naphthoquinone-diazide-5-sulfonyl trisester of 1,3,5-trihydroxybenzene Structures of high resolution in the near UV range and of high sharpness of edge and steepness of edge can be obtained by means of positive photoresists containing, in an organic solvent, in each case essentially at least (a) an alkali-soluble resin (b) a... | 12/31/1991 |
| 5074918 | Process for conditioning organic pigments A process for conditioning organic pigments by milling or kneading said pigments in the presence of 0.05 to 25% by weight, based on the pigment to be milled, of at least one micronized wax. The process, in which the use of organic solvents may be dispensed wit... | 12/24/1991 |
| 5075467 | Process for the preparation of titanocenes containing O,O'-difluoroaryl ligands An improved preparation of titanocenes of the formula I ##STR1## in which R1 is cyclopentadienyl.crclbar., indenyl.crclbar. or 4,5,6,7-tetrahydroindenyl.crclbar., each of which is unsubstituted or monosubst... | 12/24/1991 |
| 5073277 | Lubricants containing ammonium salts of methylphosphonic acid Novel salts of methylphosphonic acid with primary amines are described. These compounds are preferably used as extreme pressure additives in lubricant compositions.... | 12/17/1991 |
| 5073278 | Lubricant composition A lubricant based on a mineral or synthetic oil is stabilized against oxidative degradation by the addition of a mixture comprising at least one specified aromatic amine of the formula I ##STR1## and at least one sterically hindered amine. The lubric... | 12/17/1991 |
| 5073438 | Process for the preparation of laminates A laminate prepared by combining at least two layers wherein at least one of which is made of a fibrous material, an epoxy resin having on average at least two 1,2-epoxide groups per molecule or a mixture of these epoxy resins and a ferrocene derivative o... | 12/17/1991 |
| 5068335 | Process for the preparation of 4-hydroxy-2,2,6,6-tetramethylpiperidine A process for the preparation of 4-hydroxy-2,2,6,6-tetramethyliperidine (HTMP) by hydrogenation of triacetonamine (TAA) in the presence of an Ni, Co, Ru, Rh, Os or Ir hydrogenation catalyst is described. The process is carried out in the melt without a so... | 11/26/1991 |
| 5068515 | Apparatus for homogenizing the non-homogeneous light distribution of a laser beam An apparatus for precise, homogeneous and sharp-edged irradiation of a large area with the light of a laser beam (5), which can be used especially for large-area photodynamic therapy, is provided with a multimode fibre (10), which is illuminated by the la... | 11/26/1991 |
| 5064883 | Stabilization of acid catalyzed thermoset resins with n-hydroxy hindered amines N-hydroxy substituted hindered amine light stabilizers impart outstanding stabilization properties to acid catalyzed thermoset coating compositions with enhanced resistance against the deleterious effects of light, moisture or oxygen in the substantial ab... | 11/12/1991 |
| 5063258 | Coating compositions containing molybdenum disulfide Coating compositions which do not contain metal powders and which contain, as coloring component, 0.001 to 30% by weight of at least one organic pigment and/or of a polymer-soluble dye and/or of a pearlescent pigment and 0.001 to 30% by weight of molybden... | 11/05/1991 |
| 5059661 | Phenolic compounds as chain-terminators for the anionic solution polymerization of dienes Compounds of formula I ##STR1## wherein n is 0 to 3, R1 and R2 are C1 -C12 alkyl, C5 -C8 cycloalkyl or --CH2 SR3, R3 is C1 -C18 a... | 10/22/1991 |
| 5057610 | Compositions stabilized with substituted amino carbamates Substituted amino carbamate derivatives corresponding to the formula ##STR1## are effective in stabilizing organic materials against oxidative, thermal and actinic degradation, said derivatives being particularly effective as color improvers and proc... | 10/15/1991 |
| 5057563 | Substituted aminoxy propionamides Substituted aminoxy propionamide derivatives corresponding to the formula ##STR1## said derivatives being useful as color improvers and stabilizers in various polymeric substrates.... | 10/15/1991 |
| 5054867 | Apparatus for irradiating the bronchi of a patient for the purpose of photodynamic therapy An apparatus for irradiating the bronchi of a patient for the purpose of photodynamic therapy has an optical fibre (11) that feeds the light of a laser into a bronchoscope and is surrounded by a light-guide tube (8) and an outer tube (2). The distal end (... | 10/08/1991 |
| 5047591 | Single-stage process for producing bis-(amino-nitrophenyl)-methane Bis-(amino-nitrophenyl)-methane can be produced in one stage with an approximately quantitative yield by condensing o-nitraniline and formaldehyde in water at a temperature of between 20° and 40° C. in the presence of sulfuric acid, and subsequently ... | 09/10/1991 |
| 5045436 | Polymer compositions containing a dissolved dibenzalacetone palladium complex The invention relates to compositions containing a) at least one organic polymer and b) a dibenzalacetone palladium complex of formula I ##STR1## which is homogeneously dissolved in said polymer but is not copolymerisable therewith, in which formula I R | 09/03/1991 |
| 5043581 | Method for measuring the radioactivity of samples and an apparatus for carrying out the method The invention relates to a method and an apparatus for measuring the radioactivity of samples that are arranged in the wells of a microtitre plate and in which the radio-activity is solid-bound, for example cell-bound, or is in the form of a protein preci... | 08/27/1991 |
| 5032498 | Compositions and photographic materials containing 2-(2-hydroxyphenyl)-benztriazoles, as UV-absorbers The novel UV-absorbers are compounds of the formula ##STR1## in which R1 is, for example, hydrogen, n is one of the numbers 1 or 2 and R2 is an appropriate monovalent or divalent radical, for example --OH or --O-CH2 C... | 07/16/1991 |
| 5032488 | Method of metalizing a surface using a mixture of olefin and dibenzalacetone palladium complex When irradiated, a mixture of (a) a non-volatile substance containing at least one olefinic double bond and (b) a dibenzalacetone palladium complex deposits zero-valent palladium. Electrically non-conductive carrier materials which have been coated with a... | 07/16/1991 |
| 5032222 | Spray drier for the preparation of powders, agglomerates and the like A spray drier (1) for the preparation of powders, agglomerates or the like, by the drying of pumpable products, has at an inlet (6) of its exhaust discharge line or lines (7) for the drying gas used in its drying chamber (3), a wind sifter (9) with a rota... | 07/16/1991 |
| 5028643 | Tetrabenzodiazadiketoperylene pigment 5,15-Diaza-5b, 15b-dihydrotetrabenzo[a,g,j,p] perylene-6,16-dione, a process for the preparation thereof and its suitability for use as a pigment for coloring a wide variety of organic materials.... | 07/02/1991 |
| 5026871 | Novel oligomers useful for making cured fibre reinforced composites The invention provides a compound of the general formula I ##STR1## in which R1 is hydrogen or methyl and R2 is C1 -C12 alkyl, preferably methyl or ethyl.... | 06/25/1991 |
