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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 6689464 | Method and device for producing bisphenol a prills and bisphenol a prills produced according to this method A method for producing bisphenol A in prill form is disclosed. Molten bisphenol is top-fed into a prilling tower via a plate containing a plurality of nozzles. A gas coolant guided through a circuit is led into said tower in a counter flow direction. The ... | 02/10/2004 |
| 6686404 | Flame-resistant polycarbonate ABS moulding compounds Flame-retardant thermoplastic moulding compositions containing an aromatic polycarbonate or polyestercarbonate, a graft polymer, a thermoplastic vinyl copolymer, a fluorinated polyolefin, 0.5 to 20 parts by weight of at least one phosphorus compound of ge... | 02/03/2004 |
| 6687624 | Method and computer system for establishing a relationship between a stress and a strain The relationship between the stress ς and the strain &3xb5; is firstly established in step 100 with short-term tests as a function of the temperature T. In steps 101 to 104, a Findley model is extended in such a way as to obtain a relationship between th... | 02/03/2004 |
| 6686424 | Preparation of functionalized alkoxyamine initiator and its use A one-pot process for the preparation of functional alkoxyamines of the general formula (I), ##STR1## is disclosed. The process entails (1) reacting an oxidizing agent with a sterically hindered secondary amine to produce an aqueous phase and a nitro... | 02/03/2004 |
| 6605191 | Method for reprocessing reaction mixtures containing diaryl carbonate A process for the work up of a reaction mixture obtained from the preparation of diaryl carbonate by direct carbonylation of aromatic hydroxy compounds is disclosed. The process entails obtaining a reaction mixture that contains diaryl carbonate, aromatic... | 08/12/2003 |
| 6596820 | Light-resistant thermoplastic polyurethanes, a process for their preparation and their use A thermoplastic molding composition that contains a light-resistant aliphatic thermoplastic polyurethane elastomer is disclosed. The composition which largely contains of thermoplastic polyurethanes with high molecular weights and small amounts of thermop... | 07/22/2003 |
| 6596794 | Flame-resistant polycarbonate ABS moulding material Thermoplastic moulding compositions based on polycarbonate and/or polyester-carbonate comprising graft polymer prepared by means of bulk, solution or bulk-suspension polymerization processes and phosphorus compounds of the general formula (I) ##STR1#... | 07/22/2003 |
| 6596840 | Method for producing modified polycarbonates A process for the synthesis of polycarbonate is disclosed. The process entails reacting in the presence of at least one phosphonium salt as catalyst, at least one diphenol, at least one carbonic acid diester, and at least one alkyl group-substituted pheno... | 07/22/2003 |
| 6596800 | Polycarbonate molding materials exhibiting improved mechanical properties A thermoplastic molding compositions comprising thermoplastic polycarbonate and an additive amount of a zinc compound having an average particle diameter of 1 nm to 20 μm is disclosed. The composition has an improved crude shade and improved mechanical p... | 07/22/2003 |
| 6590058 | Oligomeric bischlorocarbonic acid esters obtained from selected cycloaliphatic bisphenols and other bisphenols This invention relates to oligomeric bischloroformic acid esters which are obtainable, in a two-phase reaction, from selected cycloaliphatic bisphenols and other bisphenols by introducing phosgene.... | 07/08/2003 |
| 6590040 | Process for the continuous production of superabsorbent polymers from PAN emulsions A process for producing a superabsorbent polymer is described. The process that entails a continuous hydrolysis of an aqueous emulsion of crosslinked or uncrosslinked polyacrylonitrile in the form of fine particles is carried out in a cascade of stirred t... | 07/08/2003 |
| 6590128 | Initiation method of a method for producing 2,2-bis(4-hydroxyphenyl)propane A process for the commissioning of a process for the production of 2,2-bis(4-hydroxyphenyl)propane is disclosed. The process that entails reacting phenol with acetone in the presence of sulfonated cross-linked polystyrene resins is characterized in that t... | 07/08/2003 |
| 6586556 | Use of copolycarbonates The present invention provides the use of impact resistant, stress cracking resistant copolycarbonates with particularly good low temperature properties for applications in which particularly good low temperature properties are required, e.g., for automob... | 07/01/2003 |
| 6584714 | Fluorescent, structured shaped bodies Optical display containing one or more shaped articles and a light source. The shaped articles consist of a transparent or semitransparent plastic. The plastic contains one or more fluorescent substances. One or more light sources are arranged in such a w... | 07/01/2003 |
| 6583257 | Composition based on copolycarbonates The invention relates to thermoplastic copolycarbonate compositions and moulded parts containing the latter having improved stress cracking resistance and thermal stability.... | 06/24/2003 |
| 6583204 | Flame resistant thermostable polycarbonate ABS moulding compounds Thermoplastic moulding composition comprising at least 2 components chosen from the group consisting of aromatic poly(ester)carbonates, graft polymers of one or more vinyl monomers on one or more graft bases having a glass transition temperature of | 06/24/2003 |
| 6573358 | Process for the preparation of superabsorbent polymers from polyacrylonitrile precipitation polymers A process for the preparation of superabsorbers is disclosed. The process entails subjecting a polyacrylonitrile precipitation polymer alkaline hydrolysis to obtain a hydrolysis product. The hydrolysate that may optionally be neutralized is dried and grou... | 06/03/2003 |
| 6566428 | Flame-resistant thermostable polycarbonate ABS moulding materials A flame-resistant, thermoplastic molding composition characterized by its improved stress cracking resistance, notched impact strength and heat resistance is disclosed. The composition contains A) an aromatic polycarbonate or polyestercarbonate, B) a graft pol... | 05/20/2003 |
| 6566486 | Method of producing branched polyamides A process for the production of polyamides is disclosed. In a first reaction step, suitable monomers such as caprolactam or an aliphatic aminocarboxylic acid are reacted with polyfunctional amines, which contain at least one secondary amino group, and/or ... | 05/20/2003 |
| 6531623 | Continuous process for producing carbonic acid diaryl ester A two stage interfacial polycondensation process for the production of carbonic acid diaryl ester is disclosed. The invention concerns an improvement to the process that entails forming in a first stage a reaction mixture that contains an inert solvent, a... | 03/11/2003 |
| 6528583 | Thermoplastic molding composition having improved dimensional stability and low gloss A thermoplastic molding composition which features improved dimensional stability and low gloss is disclosed. The composition which contains (A) a first grafted rubber having a weight average particle size of 0.05 to 0.30 microns, (B) a second grafted rub... | 03/04/2003 |
| 6528561 | Flame-resistant polycarbonate ABS blends The present invention relates to polycarbonate-ABS moulding compositions provided with phosphonate amines, which moulding compositions exhibit excellent flame protection and very good processing properties, such as improved flow properties, improved modul... | 03/04/2003 |
| 6515044 | Method for producing highly viscous polyesters The present invention relates to a process for the preparation of high-viscosity polyesters with a reduced content of acid end groups, wherein a masterbatch of low-viscosity polyesters and oxazolines is prepared, this is then mixed with a higher-viscosity... | 02/04/2003 |
| 6509510 | Method for hydrogenating aromatic polymers in the presence of special catalysts Process for hydrogenating aromatic polymers in the presence of catalysts, wherein a metal or mixture of metals from group VIII of the Periodic Table together with a support of silicon dioxide, aluminium dioxide or a mixture thereof is used as the catalyst... | 01/21/2003 |
| 6492467 | Process for making ABS polymeric blends A process for the preparation of a blend of ABS polymers is disclosed. The invention comprises introducing a core/shell grafted rubber in the form of powder (crumb) to at least one stage of the continuous mass polymerization process for making an ABS poly... | 12/10/2002 |
| 6487788 | Continuous process and apparatus for the drying and gel formation of solvent-containing gel-forming polymers A continuous process for the drying and gel formation of solvent-containing gel-forming polymers, in particular polysaccharide derivatives, by flash cooling of suspensions of the polymers, and an apparatus for the drying of solvent-containing products are... | 12/03/2002 |
| 6486243 | Thermoplastically processable polyurethane elastomers having an improved intrinsic color A light-colored thermoplastic molding composition comprising a polyurethane elastomer is disclosed. The polyurethane which is the reaction product of at least one polyol, at least one organic diisocyanate and at least one polyol chain extender contains on... | 11/26/2002 |
| 6476126 | Weatherable molding composition having improved surface appearance A thermoplastic molding composition which features improved surface appearance is disclosed. The composition contains a blend of (A) a grafted rubber comprising a crosslinked rubber substrate which contains a styrenic core and an acrylate rubber shell, to... | 11/05/2002 |
| 6476273 | Method for producing phosphonium phenolates A process for preparing phosphonium phenolate is disclosed. The process entails a reaction of phosphonium halide with phenol in an aqueous alkaline solution at a temperature of 0 to 55° C. The molar ratio of phenol to phosphonium halide is between 2:1 to... | 11/05/2002 |
| 6469191 | Method for producing diaryl carbonates A process for the production of an aromatic carbonate is disclosed. Accordingly, an aromatic hydroxy compound is reacted with carbon monoxide and oxygen in the presence of a platinum group metal catalyst, a co-catalyst, a base, and optionally a quaternary... | 10/22/2002 |
| 6433082 | Herbicidal mixtures exhibiting a synergistics effect The present invention relates to moulding compositions which are treated with phosphazenes and are based on polycarbonate and graft polymers chosen from the group consisting of silicone rubbers, EP(D)M rubbers and acrylate rubbers as the graft base, and w... | 08/13/2002 |
| 6417287 | Method for hydrogenating aromatic polymers A process for the hydrogenation of aromatic polymers is disclosed. Accordingly, the solvent used comprise an ether that contains no -hydrogen atom on a carbon atom adjacent to the ether function. The process results in virtually complet... | 07/09/2002 |
| 6417312 | Thermoplastic polyurethane elastomers A process for the production of thermoplastic polyurethane elastomer is disclosed. The process entails (a) introducing and homogeneously mixing in a first static mixer (A) an isocyanate and (B) a mixture of compounds having an average of 1.8 to 3.0 Zerewi... | 07/09/2002 |
| 6407163 | Highly impact-resistant ABS moulding materials The invention provides a combination of specific graft polymers produced by emulsion polymerization on the basis of a mixture of three rubber latices with ABS polymers produced by solution, bulk or suspension polymerization, by which products with extreme... | 06/18/2002 |
| 6395410 | Electroluminescent devices using blend systems An electroluminescent device comprising an oligomer of substituted p-divinylbenzene is disclosed. The oligomer has the general formula (I) ##STR1## in which R1 and R2 independently denote a member selected from the group consisting o... | 05/28/2002 |
| 6395828 | Low gloss ASA resin A thermoplastic molding composition comprising a grafted acrylate rubber (ASA) and a gloss reducing agent and a process for making the same are disclosed. The gloss reducing agent is the reaction product of (i) a compound having two or more epoxy groups p... | 05/28/2002 |
| 6384133 | ABS-moulding compounds with an improved combination of properties A thermoplastic molding composition having improved mechanical properties is disclosed. The ABS composition that comprise a graft rubber polymer obtained by emulsion polymerization in the presence of specifically defined butadiene polymer latices and a ru... | 05/07/2002 |
| 6384288 | Method for the production of bis(4-hydroxyaryl)alkanes A process for producing bis(4-hydroxyaryl)alkane is disclosed. The process comprise in sequence the steps of (a) passing inert gas through a melt at 150 to 230° C. that contains bis(4-hydroxyaryl)alkane and other aromatic hydroxy compounds, under conditi... | 05/07/2002 |
| 6381866 | Continuous process and apparatus for the drying and gel formation of solvent-containing gel-forming polymers A continuous process for the drying and gel formation of solvent-containing gel-forming polymers, in particular polysaccharide derivatives, by flash cooling of suspensions of the polymers, and an apparatus for the drying of solvent-containing products are... | 05/07/2002 |
| 6365678 | Process for the production of polyether block copolysulfones A process for the production of polyether block copolysulfones via trans-etherification is disclosed. In the inventive process, an aromatic sulfone polymer is reacted with an aliphatic polyether having on average at least one terminal OH function, prefera... | 04/02/2002 |
