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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7973195 | Process for unsaturated quaternary ammonium salt An unsaturated quaternary ammonium salt is produced by a process that includes reacting methyl chloride in a first vessel with a stoichiometric excess of an unsaturated tertiary amine in the presence of water to form a reaction mixture that includes the unsaturated ... | 07/05/2011 |
| 7829738 | Production of N,N-dialklylaminoethyl (meth)acrylates A method and apparatus for preparing a N,N-dialkylaminoalkyl acrylate in a continuous transesterification reaction. The reaction involves adding alkyl acrylates such as methacrylate or ethacrylate to a reboiler mechanism and efficiently removing alcohol co-products.... | 11/09/2010 |
| 7799944 | Process for the preparation of (meth)acrylate di-ammonium salts and their use as monomers for the synthesis of polymers The invention relates to the preparation of (meth)acrylate di-ammonium salts responding to formula (I) wherein R1 represents hydrogen or methyl, each R2, independently, represents an alkyl comprising f... | 09/21/2010 |
| 7598413 | Process for producing fluorine-containing alkylsulfonylaminoethyl α-substituted acrylate There is provided a process for producing a fluorine-containing alkylsulfonylaminoethyl α-substituted acrylate of the formula [3] by reaction of an aminoethyl α-substituted acrylate of the formula [1a] with a fluorine-containing alkylsulfonic fluoride of the formu... | 10/06/2009 |
| 7294240 | Method for producing (meth)acrylic acid esters Basic (meth)acrylates IV are prepared by transesterification of alkyl (meth)acrylates I in the presence of a catalyst and working-up of the reaction mixture by distillation, by a process in which a gas or gas mixture which is inert under the reaction conditions is p... | 11/13/2007 |
| 7209605 | Packaged optical sensors on the side of optical fibers The present invention concerns an optical sensor located on a preferred azimuthal portion of the side of an optical fiber. An optical fiber having two opposite ends, a core and a cladding and at least one sensing area is disclosed. Each of the sensing areas is locat... | 04/24/2007 |
| 7183434 | Process for the continuous quaternization of tertiary amines with an alkyl halide The present invention relates to a continuous process for the quaternization of tertiary amines with an alkyl halide. The process is performed at a temperature between 50° C. and 140° C. by reacting a tertiary amine and an alkyl halide in a tubular reactor at a pr... | 02/27/2007 |
| 7151190 | Method for making aqueous solutions of unsaturated quaternary ammonium salts The invention concerns a method for making aqueous solutions of unsaturated quaternary ammonium salts of formula (I) by reacting, in the presence of water, N,N-dimethylaminoethyl acrylate with a quaternizing agent of formula (II): R—Cl, said method is characterize... | 12/19/2006 |
| 7115771 | Process for producing fluorine-containing alkylsulfonylaminoethyl α-substituted acrylate The present invention provides a process for producing a fluorine-containing alkylsulfonylaminoethyl α-substituted acrylate represented by general formula [3]: which comprises reacting an aminoethyl α-substitut... | 10/03/2006 |
| 7087654 | Ion exchange and electrochemical methods and devices employing one-step quaternized and polymerized anion selective polymers The invention provides ion exchange and electrochemical methods and devices employing anion exchange polymers produced by substantially simultaneous quaternization and polymerization reactions. Anion selective polymers are produced in accordance with the invention b... | 08/08/2006 |
| 7084296 | Method for making aqueous solutions of (meth)acryloyloxyethylbenzyldimethylammonium chlorides This process for the manufacture of an aqueous solution of (meth)acryloyloxyethylbenzyl-dimethylammonium chloride ((M)ADAMQUAT BZ) by reaction, in the presence of water, of N,N-dimethylaminoethyl (meth)acrylate ((M)ADAME) with benzyl chloride is characterized in tha... | 08/01/2006 |
| 7081481 | Excitatory amino acid receptor modulators Compounds of the formula (I) in which: R1 is (CH2)nY; n is 1 or 2; Y is NHSO2R2 or X1—W—X2—R3; X1 is O or NH; W is C═O, C═S, C═NH, or SO2; X | 07/25/2006 |
| 7064232 | Hydrophobic modified diquaternary monomers and polymers as thickening agents of acidic aqueous compositions The invention relates to the preparation of hydrophobic modified diquaternary cationic monomers and their copolymer as well as the use such monomers and copolymers as thickening agents/rheology modifiers for acidic compositions. The hydrophobic modified diquaternary... | 06/20/2006 |
| 7049046 | Infrared absorbing compounds and their use in imageable elements Infrared absorbing compounds are disclosed. The compounds are co-polymers that comprise covalently attached ammonium, sulfonium, phosphonium, and/or iodonium cations, and infrared absorbing cyanine anions that have two to four sulfonate groups and/or sulfate groups,... | 05/23/2006 |
| 6960690 | Process of making a compound by forming a polymer from a template drug A method of forming polymers in the presence of nucleic acid using template polymerization. Also, a method of having the polymerization occur in heterophase systems. These methods can be used for the delivery of nucleic acids, for condensing the nucleic acid, for fo... | 11/01/2005 |
| 6875889 | Monomers with quaternary amino groups, methods for making same, and novel (co)polymers obtained from said novel monomers The invention relates to compounds of formula (I), prepared by quaternising a compound (II) by means of at least one compound R3—X⊖: R1=H or —CH3; R2=—CH | 04/05/2005 |
| 6841697 | Process for preparing 2-(dimethylamino)-1-(dimethyl-aminomethyl) ethyl meth (acrylate) Process for preparing a compound (I) by reacting a compound of formula (II) with the alcohol (III). The reaction is carried out using dibutyltin oxide as transesterification catalyst. R | 01/11/2005 |
| 6683203 | Process for the manufacture of aqueous solutions of unsaturated quaternary ammonium salts This process for the manufacture of an aqueous solution of the unsaturated quaternary ammonium salt corresponding to the formula (I), by reaction, in the presence of water, of N,N-dimethylaminoethyl acrylate (DAMEA) with a quaternizing agent of formula (I... | 01/27/2004 |
| 6673884 | Method for making monomers with two quarternary amino group and (co)polymers obtained from said monomers To prepare compound (I), a quaternising agent R3 --X.crclbar. is introduced into a solution, in an organic solvent or a mixture of organic solvents, of a compound of formula (III), at a temperature of 35 to 80° C., and the reaction ... | 01/06/2004 |
| 6670508 | Process for manufacturing the chloride of 1,3-bis- (dimethylbenzylammonium) isopropyl, acrylate alone or mixed with other monomers, and corresponding (co) polymers A compound of formula (I) is prepared alone or in combination with at least one monomer of formula (II): the quaternizing agents benzyl chloride is introduced into a solution, in a solvent selected from compounds of the formulae (I) and (II) and mixtures ... | 12/30/2003 |
| 6646156 | (Meth)acryloyl-group-containing carbamoyl halides and production process therefor The present invention provides a (meth)acryloyl-group-containing carbamoyl halide represented by the following formula (1): ##STR1## where R1 represents a hydrogen atom or a methyl group; R2 represents a linear or branched C1-C10 alk... | 11/11/2003 |
| 6562995 | Delta dicarbonyl compounds and methods for using the same Amidomethyl esters, carbonylmercaptomethyl esters, keto-containing esters, amidomethyl thioesters, amidomethyl amides, and methylene dithioesters are disclosed. The novel compounds have two carbonyl groups connected by a linking moiety having an oxygen, s... | 05/13/2003 |
| 6521782 | Method for making aqueous solutions of unsaturated quaternary ammonium salts The present invention relates to a process for the manufacture of aqueous solutions of unsaturated quaternary ammonium salts. The salts can correspond to the following formula (I): ##STR1## in which R represents a methyl or benzyl radical, by reaction, in... | 02/18/2003 |
| 6469204 | Acrylates comprising several quaternary amino groups in the alcohol part, their process of manufacture and the (co) polymers obtained from these monomers These compounds are represented by the formulae (Ia) and (Ib). To prepare them, in a first stage, p-xylylene dichloride is reacted with a compound (II) to produce a compound (III) and, in a second stage, the compound (III) thus obtained is reacted with a ... | 10/22/2002 |
| 6458908 | Sulfur-containing unsaturated carboxylate compound and its cured products A sulfur-containing unsaturated carboxylate compound comprising a sulfur-containing substituent and at least two ,ଲ-unsaturated carboxylic acid residues, which are each attached to a secondary or tertiary carbon atom via an oxygen atom; a pol... | 10/01/2002 |
| 6437173 | Process for the continuous manufacturing of dialkylaminoalkyl (METH) acrylates having a critical order of steps The present invention relates to the manufacture of a dialkylaminoalkyl (meth)acrylate by transesterification of methyl or ethyl (meth)acrylate with an amino alcohol. The transesterification catalyst is chosen from tetrabutyl, tetraethyl and tetra(2-ethyl... | 08/20/2002 |
| 6417392 | Method for production of alkylamino(Meth)acrylate and apparatus therefor In the operation of producing an alkylamino(meth)acrylate by the reaction of transesterification of an alkyl(meth)acrylate with an alkylamino alcohol, the alkyl alcohol by-produced during the transesterification is distilled in the form of an azeotropic m... | 07/09/2002 |
| 6413698 | Photohardenable resin composition providing heat-resistant photohardened product A photohardenable resin composition comprising (A) a urethanated acrylic compound represented by formula (I): (A)a --C--(R)4-a wherein R is H or alkyl; a is 3 or 4; and A represents a group of formula (II): ##STR1## wherein D represe... | 07/02/2002 |
| 6362363 | Synthesis of vinyl carbonates for use in producing vinyl carbamates A method for making a vinyl carbonate represented by the formula (I): CH2.dbd.CHOC(O)X1 R1 (I) wherein X1 is oxygen or sulfur and R1 is a substituted or an unsubstituted aliphatic alkyl, aryl, aryl alkyl, olef... | 03/26/2002 |
| 6268111 | Photoimageable composition having photopolymerizeable binder oligomer An oligomer is provided having tetraacrylate functionality as well as carboxylic acid functionality. The oligomer is useful as a photopolymerizable binder in photoresists for forming printed circuitry. Particular advantages of the oligomer are found in so... | 07/31/2001 |
| 6265132 | Photoimageable composition containing flexible oligomer The invention provides an oligomer having tetraacrylate functionality which provides enhanced flexibility to photoimageable compositions which function as photoresists. The enhanced flexibility is particularly advantageous in epoxy-containing, solder mask... | 07/24/2001 |
| 6262299 | Zwitterionic monomer having amino-multicarboxylic acid functionality A zwitterionic monomer having amino-multicarboxylic acid functionality having Structure (I) ##STR1## wherein R1 is selected from the group consisting of H, an alkyl group having 1 to 6 carbon atoms; R2 is (CH2)n... | 07/17/2001 |
| 6218536 | 1,2-bis-adducts of stable nitroxides with substituted ethylenes and stabilized compositions 1,2-Bis-adducts of stable hindered nitroxide compounds with substituted ethylenes are prepared by reacting two equivalents of nitroxyl compound with an ethylenically unsaturated compound such as styrene or an acrylate ester. These adducts are very effecti... | 04/17/2001 |
| 6172140 | Acrylic thio monomers A cross-linkable polymeric casting composition includes an effective amount of an acrylic or methacrylic di- or polythiol monomer of the formula (1) wherein p is an integer of 0 or 1, M or M' are each spacer groups selected from one or more of the followi... | 01/09/2001 |
| 6080885 | Process for preparing a phosphonium salt compound having an acryl group A phosphonium salt compound having an acryl group which is represented by the following general formula (3) can be made in simple operations: ##STR1## (wherein A represents a alkylene group, Y represents Cl, Br or I, R1 represents H or CH | 06/27/2000 |
| 5990345 | Process for preparation of ethylenically unsaturated isocyanates A process for the preparation of ethylenically unsaturated isocyanates is described, which process comprises silylating an appropriate ethylenically unsaturated urethane precursor at the urethane nitrogen and converting the resulting unsaturated N-silyl-u... | 11/23/1999 |
| 5939466 | Poly-unsaturated carbohydrate derivatives, polymers thereof and their use The present invention relates to polymerizable derivatives of carbohydrates comprising a carbohydrate radical and more than one radically polymerizable hydrocarbon group which is linked optionally via a spacer to the carbohydrate radical, to homopolymers,... | 08/17/1999 |
| 5919974 | Process for the manufacture of aqueous solutions of unsaturated quaternary ammonium salts Process for the manufacture of an aqueous solution of the unsaturated quaternary ammonium salt corresponding to the following formula (I): ##STR1## by reaction, under pressure and in the presence of water, of N,N-dimethylaminoethyl methacrylate with ... | 07/06/1999 |
| 5912383 | Stabilized aqueous solutions of unsaturated quaternary ammonium salts A description is given of a stabilized aqueous solution of unsaturated quaternary ammonium salt(s) (I), having been obtained by reaction, in the presence of water, of N,N-dimethylaminoethyl (meth)acrylate (II) with a quaternizing agent (III), at least one... | 06/15/1999 |
| 5912384 | Color-stabilized basic monomers, process for producing the same and method for handling the same Color-stabilized basic monomers are provided. Said basic monomers are obtained by adding, to a basic monomer e.g. an N,N-dialkylaminoalkyl (meth)acrylate or an N,N-dialkylaminoalkyl (meth)acrylamide!, at least one member selected from the group consisti... | 06/15/1999 |
