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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 |
| 7750191 | Method for producing polyether alcohols The invention provides a process for continuously preparing polyether alcohols by adding alkylene oxides to H-functional starter substances using a DMC catalyst, comprising the steps of a) preparing a precursor by continuously metering an H-functional s... | 07/06/2010 |
| 7576244 | Compounds and compositions for use as foaming or frothing agents in ore and coal flotation Compounds of formula (I) wherein R1 and R2 are each independently C1-C2 alkyl, and m is 1, 2, 3, 4, or 5 and compositions of formula (II) wherein R1 and R2 are each independently C1-C4... | 08/18/2009 |
| 7504543 | Polyether alcohols and method for the production of polyether alcohols for polyurethane synthesis The invention relates to polyether alcohols, to a process for preparing polyether alcohols by reacting alkylene oxides in the presence of a double metal cyanide (DMC) catalyst with at least one saturated OH component which may, if appropriate, have previously been r... | 03/17/2009 |
| 7482495 | Process for making alkylene glycol ether compositions useful for metal recovery A process for making an alkylene glycol ether composition is disclosed. In one aspect, the process comprises reacting propylene glycol methyl ether (PM) with from 1.5 to 3 equivalents of propylene oxide (PO). The resulting alkoxylation mixture is distilled to provid... | 01/27/2009 |
| 7423186 | Process for preparing alkoxy-pure alkaline earth alkoxides The present invention provides a process for preparing a metal-free alkaline earth methanolate by alcoholysis of an alkaline earth ethanolate with methanol. ... | 09/09/2008 |
| 7414159 | Separation of liquid mixtures in a film evaporator A liquid mixture comprising at least one readily volatile and at least one sparingly volatile component is separated in a film evaporator by a process in which (i) a continuous stream of a liquid starting material mixture is provided, (ii) ... | 08/19/2008 |
| 7405330 | Preparation of polytrimethylene ether glycol and copolymers thereof The present invention relates to a process comprising using ionic liquids for the polycondensation of 1,3-propanediol reactants to produce polytrimethylene ether glycol and copolymers thereof. ... | 07/29/2008 |
| 7396963 | Method for preparing metal cyanide catalyst complexes using partially miscible complexing agents Metal cyanide catalysts are complexed with complexing agents that are miscible in poly(propylene oxide) at higher temperatures and immiscible at lower temperatures. ... | 07/08/2008 |
| 7388114 | Perfluoropolyether derivative A novel perfluoropolyether derivative which is less likely to undergo decomposition, which is free from a problem of deterioration during its use, and which is useful as a lubricating oil or a coating agent, is provided. A compound represented by the followin... | 06/17/2008 |
| 7378559 | Continuous process and system of producing polyether polyols A continuous process and system for producing polyether polyols that allows for continuously adding an unreacted oxide to a loop reactor while adding at least one thermally deactivating catalyst capable of thermally deactivating prior to decomposition of polyether p... | 05/27/2008 |
| 7348460 | Method for producing alkanol alkoxylates at optimal reaction temperatures The present invention relates to a process for preparing at least one alkoxylate, which comprises bringing at least one alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, pentylene oxide and decene oxide into contac... | 03/25/2008 |
| 7335801 | Polyglycerols and production thereof A polyglycerol composition contains diglycerol, triglycerol, and tetraglycerol each in a content of 5 percent by weight or more, has a total content of diglycerol, triglycerol, and tetraglycerol of 75 percent by weight or more, has a total content of higher polyglyc... | 02/26/2008 |
| 7323605 | Double metal cyanide-catalyzed, low unsaturation polyethers from boron-containing starters The present invention provides a process for the double metal cyanide (DMC)-catalyzed production of low unsaturation polyethers from boron-containing starters. The polyethers produced by the inventive process may be reacted with one or more isocyanates to provide po... | 01/29/2008 |
| 7312363 | Method for activating double metallocyanide-compounds The present invention relates to a process for reacting epoxides with an initiator compound in the presence of a double metal cyanide compound as a catalyst, said process having a shortened induction period, and the double metal cyanide compound being activated by a... | 12/25/2007 |
| 7312364 | Equilibrium reaction and gas/liquid reaction in a loop reactor The invention relates to a process for simultaneously performing two chemically successive reactions in a loop reactor, specifically reaction I) an optionally catalyzed equilibrium reaction between high-boiling liquid reactants, in which essentially one high boiler ... | 12/25/2007 |
| 7267898 | Freeze prevention of a fuel cell power plant A fuel cell power plant comprises a water circulation passage (5) which circulates the cooling water in a fuel cell stack (4). Sodium hydroxide which lowers the melting point of water is mixed with water in the water circulation passage (5) to p... | 09/11/2007 |
| 7267775 | Gas processing method using a filtered glycol solution The invention relates to a method and to a plant for processing a gas by means of a glycol solution wherein a feed comprising a gas, a glycol, water and salts is subjected to a first stage (5) of separating the gas from a liquid effluent and said liquid efflu... | 09/11/2007 |
| 7241926 | Method for producing polyether alcohols A process for preparing polyether alcohols by addition of alkylene oxides onto H-functional starter substances in the presence of multimetal cyanide catalysts, wherein the multimetal cyanide catalysts are microporous and have a specific surface area of more than 100... | 07/10/2007 |
| 7230140 | Perfluoropolyether derivative A novel perfluoropolyether derivative which is less likely to undergo decomposition, which is free from a problem of deterioration during its use, and which is useful as a lubricating oil or a coating agent, is provided. A compound represented by the followin... | 06/12/2007 |
| 7223832 | Double-metal cyanide catalysts which can be used to prepare polyols and the processes related thereto The present invention is directed to polyols prepared in the presence of double metal cyanide catalysts (“DMC”) which are prepared by combining i) at least one metal salt; ii) at least one metal cyanide salt; iii) at least one organic complexing ligand; iv) at l... | 05/29/2007 |
| 7202385 | Process for the alkoxylation of monools in the presence of metallo-organic framework materials The present invention relates to a process for the alkoxylation of a monool with at least one alkoxylating agent to an alkoxylated alcohol wherein a catalyst is employed which comprises a metallo-organic framework material of metal ions and at least bidentate coordi... | 04/10/2007 |
| 7199193 | Polyethylene glycol compounds and process of making A process for making substituted polyethylene glycol compound. The compound has the formula RO(C2H40)nH wherein R represents a C1–7 hydrocarbon group and n represents the average number of moles of C2H40 groups, ranging from 500 to 2000. The compound has a ratio o... | 04/03/2007 |
| 7196030 | Method for producing alkoxylated products at optimized reaction pressures The present invention relates to a process for the preparation of at least one alkoxylate comprising the bringing into contact of an alkylene oxide mixture at least comprising ethylene oxide with at least one starter compound in the presence of at least one double-m... | 03/27/2007 |
| 7186867 | Process for preparing reactive polyether polyols having an ethylene oxide end block Process for preparing polyether polyols having an end block of ethylene oxide by addition of alkylene oxides onto H-functional starter substances, in which A) a polyether polyol precursor is prepared by means of double metal cyanide (DMC) catalysis in a... | 03/06/2007 |
| 7169956 | Double metal cyanide complex catalyst, its production process and its utilization Provided is a double metal cyanide complex catalyst with a high activity which is readily produced on an industrial scale. The double metal cyanide complex catalyst is of a fine particle form and contains t-butyl alcohol or, t-butyl alcohol and another organic compo... | 01/30/2007 |
| 7164046 | Manufacture of polytrimethylene ether glycol The present invention relates to a process of manufacture of polytrimethylene ether glycol, in which one or more inorganic compounds selected from an inorganic salt and an inorganic base is utilized during certain purification steps to reduce phase separation time. | 01/16/2007 |
| 7161045 | Process for manufacture of polytrimethylene ether glycol A process of manufacture of polytrimethylene ether glycol comprising: (a) polycondensing reactant comprising diol selected from the group consisting of 1,3-propanediol, 1,3-propanediol dimer and 1,3-propanediol trimer or mixtures thereof in the presence of ac... | 01/09/2007 |
| 7157607 | Manufacture of polytrimethylene ether glycol A process of manufacture of polytrimethylene ether glycol comprising: (a) polycondensing reactant comprising diol selected from the group consisting of 1,3-propanediol, 1,3-propanediol dimer and 1,3-propanediol trimer or mixtures t... | 01/02/2007 |
| 7022884 | Preparation of polyetherpolyols in the presence of a multimetal cyanide complex catalyst Polyetherpolyols are prepared by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst by a process which is carried out in a vertical, highly cylindrical reactor ... | 04/04/2006 |
| 7015364 | Process for preparing polyether polyols A process for preparing polyether polyols includes a precipitation step, a recrystallization step, and a reaction step. In the precipitation step, a multimetal cyanide compound is precipitated by reaction of a metal salt with a cyanometalate compound. In the recryst... | 03/21/2006 |
| 7005552 | Single reactor synthesis of KOH-capped polyols based on DMC-synthesized intermediates The present invention relates to processes for preparing ethylene oxide (EO)-capped polyols in which removal of catalyst residues or salts formed by the neutralization of the basic catalyst is not required prior to discharging the polyol from the reactor because neu... | 02/28/2006 |
| 6927310 | Tripropylene glycol production A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at least one aldehyde, separating from said composition tripropylene glyc... | 08/09/2005 |
| 6919486 | Polyetherols produced using aluminium phosphonate catalysts A method for the production of polyetherols using aluminum phosphonate catalysts is disclosed. Reaction products of the process include various polyetherols including very low unsaturation polyether polyols. The aluminum phosphonate catalyst preferably has a general... | 07/19/2005 |
| 6821308 | Polyoxyalkylene monoethers with reduced water affinity Oleophilic polyoxyalkylene monoethers having reduced water affinity are disclosed. The monoethers have a hydrocarbyl residue, a polyoxyalkylene moiety, and a hydroxyl end group. The monoethers contain less than about 6 mole percent of alkoxylated unsaturates, and pr... | 11/23/2004 |
| 6806348 | Process for removing and regenerating a double metal cyanide (DMC) catalyst from a polymer polyol A method of removing and reclaiming a double metal cyanide (DMC) catalyst from a polyol is disclosed. A polymeric acid that is soluble in the polyol is introduced into the polyol during or after the polymerization reaction. The polymeric acid reacts with the double ... | 10/19/2004 |
| 6765116 | Process of preparing a fluid rare earth alkoxylation catalyst A process to prepare an improved fluid rare earth phosphate catalyst composition useful in preparing alkylene oxide adducts of organic compounds having active hydrogen atoms is provided. The catalyst is prepared by dissolving a rare earth salt in a C9-C | 07/20/2004 |
| 6756465 | Moisture curable compounds and compositions A moisture curable compound for bonding substrates and a moisture curable adhesive composition are provided. The adhesive composition includes an alkoxysilane functional urethane compound having hydrolyzable alkoxysilane groups anchored on a flexible backbone. Also ... | 06/29/2004 |
| 6730815 | Method of producing glycol ethers The present invention provides a method of producing glycol ethers, which are also commonly known as glymes. The method according to the invention includes contacting a glycol with a monohydric alcohol in the presence of a polyperfluorosulfonic acid resin catalyst u... | 05/04/2004 |
| 6713599 | Formation of polymer polyols with a narrow polydispersity using double metal cyanide (DMC) catalysts A method of forming a polyol includes the steps of reacting an initiator with an alkylene oxide, and optionally carbon dioxide, in the presence of a double metal cyanide catalyst and a sterically hindered chain transfer agent capable of protonating the growing polyo... | 03/30/2004 |
| 6620975 | Process for making butyl ethers of glycols Processes are described for the preparation of glycol butyl ethers involving reaction of butadiene with saturated aliphatic glycols, separating the thus formed n- and sec-butenyl glycol ethers and hydrogenating the n-butenyl glycol ethers. Additional feat... | 09/16/2003 |
