Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 6191296 | Continuous method of manufacturing chlorine-free tetraalkoxysilanes Chlorine-free tetraalkoxysilanes of formula (I) (R1 O)4 Si (I) wherein R1 is, independently in each instance, an unbranched, branched, and/or cyclic C1-6 hydrocarbon group is continuously manufactured by a process, ... | 02/20/2001 |
| 6142024 | Apparatus and method for sampling and IR-spectroscopic analysis of high-purity, hygroscopic liquids An apparatus and method for the sampling and quantitative, IR-spectroscopic determination of impurities in hygroscopic liquids. The apparatus includes a stainless steel tube having a straight bore, a first end, and a second end. A first flange attachment ... | 11/07/2000 |
| 5962726 | Amphiphilic compounds with several hydrophilic and hydrophobic groups based on alkoxylated amines and/or amides and di-, oligo- or polycarboxylic acids The invention relates to amphiphilic compounds of the general formula I ##STR1## with at least two hydrophilic and at least two hydrophobic groups based on alkoxylated amines and/or alkoxylated fatty acid amides and di-, oligo- or polycarboxylic acid... | 10/05/1999 |
| 5932757 | Mixture of oligomers of condensed alkylalkoxysilanes A mixture of oligomers of alkylalkoxysilanes condensed in the chain and/or cyclic form, said mixture of oligomers containing less than 2% by weight of free alcohols and the condensed alkoxysilanes satisfying formula I: ##STR1## wherein R is an alkyl ... | 08/03/1999 |
| 5660807 | Process for the removal of HCN from gas mixtures The invention relates to a process for the removal of HCN from gas mixtures that contain at least HCN and sulfur compounds, especially from gas mixtures that are obtained by partial oxidation of hydrocarbons, by catalytic decomposition of HCN, as well as ... | 08/26/1997 |
| 5616723 | Process for the preparation of 3-amino-5-methylpyrazole 3-Amino-5-methylpyrazole is prepared by reaction of cyanoacetone or an alkali metal salt thereof with hydrazine, a hydrazinium salt, or hydrazine hydrate.... | 04/01/1997 |
| 5591818 | Organosilane polycondensation products Disclosed are organosilane polycondensation products prepared by hydrolysis of an hydrogen salt of an aminosilane compound or by hydrolysis of an aminosilane followed by reaction with an alkyl salt. The compounds are useful in forming stable aqueous solut... | 01/07/1997 |
| 5569780 | Dialkyl 2-haloethyl malonates Novel dialkyl 2-haloethyl malonates are prepared from a dialkyl cyclopropane-1,1-dicarboxylate by reaction with a hydrogen halide in the presence of a 1,2-dialkoxy ethane as a solvent and of a Friedel-Crafts catalyst.... | 10/29/1996 |
| 5545253 | Binder for storable coating compositions A binder composition for storable zinc dust paints contains a mixture of silicic acid esters, solvents, curing agents, an antideposition agent, and a dearomatized aliphatic hydrocarbon mixture with an average molecular weight of 133. The binder compositio... | 08/13/1996 |
| 5510509 | Preparation of esters of cyclopropane-1,1-dicarboxylic acid Dialkyl cyclopropane-1,1-dicarboxylates are prepared from a dialkyl malonate, a 1,2-dichloroalkane and finely divided potassium carbonate while azeotropically removing the water released by the reaction.... | 04/23/1996 |
| 5480806 | Method for determining decomposable organic carbon compounds present in a geseous phase The content of decomposable organic carbon compounds present in a gaseous phase is determined down to the parts per billion (10-9) range and in special cases down to the parts per trillion (10-12) range. The gaseous sample material b... | 01/02/1996 |
| 5463111 | Process for preparing dialkyl 2-haloethyl malonates Dialkyl 2-haloethyl malonates are prepared from a dialkyl cyclopropane-1,1-dicarboxylate by reaction with a hydrogen halide in the presence of a 1,2-dialkoxy ethane as a solvent and of a Friedel-Crafts catalyst.... | 10/31/1995 |
| 5437775 | Method for preparing high-purity propylene carbonate and for simultaneously making passivated electrodes This invention relates to a method for preparing high-purity propylene carbonate and for simultaneously making passivated electrodes, wherein optionally prepurified propylene carbonate is exposed in a cell to an electric field between bare electrodes.... | 08/01/1995 |
| 5399778 | Process for the preparation of ketals Ketals of longer-chain or branched alcohols are prepared from dimethyl ketals or their ketones by reaction of the dimethyl ketals and the alcohols at high temperatures of 150° to 180° C. in the presence of acid catalysts. The enol ethers and mixed ketal... | 03/21/1995 |
| 5384350 | Binders for storage-stable coating compositions A binder composition for zinc dust paints contains silicic acid esters, solvents, curing agents, an anti-settling agent and n-butyl acetate. The composition has a flash point above 21° C.... | 01/24/1995 |
| 5378780 | Process for the production of paste-forming vinyl chloride polymers Paste-forming polymers of vinyl chloride are produced by discontinuous polymerization in the presence of a conventional predispersion of emulsifier, dispersion acid, water and optional monomer-soluble catalyst. The predispersion is prepared only with 30-8... | 01/03/1995 |
| 5378769 | Molding compositions containing a polycondensation product of a polyamide, a polyester and a compatibilizer A molding composition is provided which is effective as an agent for imparting compatibility in thermoplastic blends or as an adhesion-promoting layer in composite materials which comprises: A. a polyamide B. a polyester, and C. an oxazoline derivative.... | 01/03/1995 |
| 5371216 | Pyridinium salts containing alkoxysilyl groups Pyridinium salts of the formula ##STR1## are prepared. The compounds are useful as phase transfer catalysts for the preparation of methacryloyloxyalkylalkoxysilanes and acryloyloxyalkylalkoxysilanes.... | 12/06/1994 |
| 5366658 | Use of polymethylalkanes as biodegradable base oils in lubricants and functional fluids The invention relates to the use of polymethylalkanes having terminal methyl groups and methylene and ethylidene groups of the formula I ##STR1## in which the total number of C atoms n+2 m+2 is 20 to 100 and the ratio of the methyl and methylene grou... | 11/22/1994 |
| 5359003 | Polysulfide derivatives Polysulfide derivatives, having the general formula (A--S--S--)2 X--S--S--A processes for their production and their use for crosslinking of reversion-stable rubber vulcanizates are provided. Crosslinking with reduced reversion and loss of elas... | 10/25/1994 |
| 5349073 | Low-temperature-stable titanium chelates and method for their preparation Isopropoxyalkoxytitanium bis(acetylacetonate) compounds are prepared by admixing diisopropoxytitanium bis(acetylacetonate) with a dialkoxytitanium bis(acetylacetonate), and allowing the mixture to react, optionally at elevated temperatures.... | 09/20/1994 |
| 5344950 | Process for the preparation of vinylchlorosilanes A process for the continuous production of vinylchlorosilanes by reacting vinyl chloride with chlorosilanes at elevated temperature consists of a heatable reaction tube having an internal diameter d1 and a tubular displacement body having an ex... | 09/06/1994 |
| 5342900 | Process for the preparation of diene rubber vulcanizates Vulcanization of diene rubbers at a temperature of from 140° to 200° C. in the presence of 1 to 4.5 parts of a crosslinker having the formula ##STR1## wherein n denotes 2 or 6 and Bz denotes benzyl, in the simultaneous presence of a very small... | 08/30/1994 |
| 5338882 | Process for the production of DMT-intermediate product of specific purity and pure terephthalic acid The invention relates to a process for the production of a DMT intermediate product as well as its working up to fibregrade DMT and to medium pure and pure terephthalic acid. The DMT intermediate product is moreover produced by combined oxidation of a pre... | 08/16/1994 |
| 5334747 | Method of preparing substituted malonic ester anilides and malonic acid mono-anilides Malonic mono-ester mono-anilides and malonic acid mono-anilides and bis-anilides are produced by reaction of malonic acid di-alkyl esters with an aniline in the presence of a stoichiometric amount, based on the aniline, of an alkali alcoholate, accompanie... | 08/02/1994 |
| 5331078 | Blocked highly functional polyisocyanate adducts, a process for the preparation thereof and the use thereof A blocked highly functional polyisocyanate adduct is described with a melting point of 2 contains 1.1-2 mol of blocking agent per b... | 07/19/1994 |
| 5321167 | Method of manufacturing nonionic surfactants low in alkylene oxides and low in 1,4-dioxane, using alkali metal alkoxides as catalysts An alkoxidation production low in alkylene oxide and 1,4-dioxane content is prepared by reacting an alkylphenol or fatty alcohol with an alkylene oxide in the presence of an alkali fatty alkoxide obtained by direct reaction of an alkali hydroxide with a f... | 06/14/1994 |
| 5318799 | Process for tempering the surface of a body For tempering the surface of a body, the body is covered with a sheath of at least one meltable active substance and binder material and heated under vacuum or in an inert atmosphere first to a temperature whereby the sheath is transformed into a porous c... | 06/07/1994 |
| 5286896 | Process for the production of DMT-intermediate product of specific purity The invention relates to a process for the production of a DMT intermediate product as well as its working up to fibregrade DMT and to medium pure and pure terephthalic acid. The DMT intermediate product is moreover produced by combined oxidation of a pre... | 02/15/1994 |
| 5282998 | Mixtures of linear and cyclic siloxanes or siloxane oligomers and a process for their preparation Mixtures of siloxane oligomers having a degree of oligomerization of 0 to 8, which have no more than one vinyl substituent attached per silicon atom as well as methoxy and/or ethoxy groups, the molar ratio of vinyl groups to alkoxy groups being 1:1 to 1:8... | 02/01/1994 |
| 5281728 | Oxidation of ethylene A silver catalyst suitable for the oxidation of ethylene is provided in which the silver within a support particle, e.g., alumina, is non-uniformly distributed so that the silver concentration is clearly greater on the geometric surface and in the surface... | 01/25/1994 |
| 5258536 | (2-methyl-3-chloropropyl)-cyclohexyl-dialkoxysilanes Novel (2-methyl-3-chloropropyl)-cyclohexyl-dialkoxysilanes are prepared by reacting a (2-methyl-3-chloropropyl)-cyclohexyldichlorosilane with a corresponding alcohol. The novel compounds are useful for the modification of silicones.... | 11/02/1993 |
| 5258470 | Molding compounds based on aromatic polyamides An aromatic polyamide molding compound, comprising: I. an aromatic polyamide having the basic structure ##STR1## where Ar is an aromatic radical without amine-reactive functional groups n is a number between 5 and 500; X represents --SO2 -- or... | 11/02/1993 |
| 5252307 | Method of processing chlorosilane distillation residues with steam A method for processing chlorosilane distillation residues by hydrolysis with steam, in which the hydrolysis is carried out at escalating temperatures from about 130° C. to at least 170° C.... | 10/12/1993 |
| 5250594 | Aqueous polymer dispersion with polymer particles exhibiting polyol groups The invention is directed to the preparation of aqueous polymer dispersions with polymer particles having polyol groups. The interfacial hydrophilia can be set in a desired manner. The dispersions contain substantially no dissolved macromolecular substanc... | 10/05/1993 |
| 5246682 | Process for waste liquid-free processing of chlorosilane distillation residues with hydrochloric acid A process for waste liquid-free processing of residues of chlorosilane distillations, wherein the residue is allowed to react with liquid hydrochloric acid accompanied by the release of hydrogen chloride, the resulting reaction mixture is allowed to coagu... | 09/21/1993 |
| 5242992 | Polyamide molding compound 1. A polyamide molding compound, comprised of: (I) an aromatic polyamide having the structure ##STR1## where n is a number between 5 and 500; X represents --SO2 -- or --CO--, and Y represents --O-- or --S--; and (II) an amorphous polyamide.... | 09/07/1993 |
| 5235051 | Pyridinium salts containing alkoxysilyl groups Pyridinium salts of the formula ##STR1## are prepared. The compounds are useful as phase transfer catalysts for the preparation of methacryloyloxyalkylalkoxysilanes and acryloyloxyalkylalkoxysilanes.... | 08/10/1993 |
| 5231121 | Natural fiber containing molding compounds based on unsaturated polyester resins, and molded bodies obtained from the molding compounds Molding compositions based on unsaturated polyester (UP) resins and containing natural fibers are prepared from which molded parts can be produced by hot pressing. The molded parts have a residual styrene content | 07/27/1993 |
| 5231215 | Method of manufacturing substituted monoamides of dicarboxylic-acid monoalkyl esters A method of preparing a compound of the formula ##STR1## in which R1 is CH3 or C2 H5, n is 0 to 4, m is 1 to 3, R2 is H, --COOR1, alkyl or aryl, and R3 and R4 each independ... | 07/27/1993 |
