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| Number | Title | Issue Date |
| 7476718 | Process for producing polyoxymethylene A process for the polymerization of formaldehyde, comprising contacting formaldehyde in a hydrocarbon solution with an aliphatic anhydride and a quaternary ammonium salt polymerization initiator of the formula: R1R2R3R... | 01/13/2009 |
| 7137423 | Tire with component comprised of amine functionalized styrene/diene copolymer elastomer, silanol functionalized carbon black and coupling agent The invention relates to a tire having at least one component (e.g. tread) of a rubber composition comprised of an amine functionalized styrene/conjugated diene copolymer elastomer (e.g. styrene/butadiene and/or styrene/isoprene/butadiene copolymer elastomer) which ... | 11/21/2006 |
| 7135539 | Novolac resins, process for preparing them and uses thereof The present invention relates to novel novolac resins obtained by coupling at least one aromatic compound (A) comprising at least two hydroxyl groups and at least one aldehyde (B) in the presence of an acid catalyst and in the presence of water and/or an organic sol... | 11/14/2006 |
| RE39182 | Process for the preparation of thermally stable polyoxymethylene copolymers A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the initiator is... | 07/11/2006 |
| 7049389 | Process for preparing of aromatic oligomers This invention relates to a process for preparing high-purity aromatic oligomers by effectively separating an organic layer containing aromatic oligomers or the reaction products of a polycyclic aromatic compound with formaldehyde from an aqueous layer containing an... | 05/23/2006 |
| 7022813 | Process for purifying and reusing solvent used to remove extractables A process for treating biomedical devices, especially contact lenses, involves contacting polymeric devices containing extractables with a solvent that dissolves and thereby removes the extractables from the device, treating the solvent to remove extractables from t... | 04/04/2006 |
| 7011210 | Magnetic tape cassette case In a magnetic tape cassette case including an accommodating portion, a lid portion and a connecting portion for connecting the accommodating portion and the lid portion. The case has movement preventing member capable of accommodating magnetic tape cassettes having ... | 03/14/2006 |
| 7001959 | Polyoxymethylene copolymers, their preparation and use Copolymers are described containing blocks of the structural repeat units of the formula I and blocks containing structural units of the formula II [—O—CH2—]x, (I) [—O—R1—], (II) wh... | 02/21/2006 |
| 6995213 | Oriented films prepared using impact copolymer polypropylene Disclosed is a method of producing a novel biaxially oriented film having a high diffraction of light, and flexibility. In particular, the invention disclosed provides a method for making an opaque impact copolymer film by stretching in two dimensions an impact poly... | 02/07/2006 |
| 6756475 | Preparation of polyoxymethylenes Continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and also, if desired, in the presence of regulators, where during the polymerization both the monomers and the polyme... | 06/29/2004 |
| 6576714 | Production process for glyoxylic acid (salt)-based polymer The present invention provides a production process for a terminal-end-stabilized glyoxylic acid (salt)-based polymer, which process enables to reduce the amount of the polymerization solvent, as recovered or removed after the end of the polymerization (b... | 06/10/2003 |
| 6551702 | Melamine resin dispersions Aqueous melamine resin dispersions comprise as discontinuous phase a melamine resin stabilized with a combination of a cationic protective colloid and an anionic protective colloid.... | 04/22/2003 |
| 6410776 | Method for producing resols The invention relates to a process for the preparation of resols by reacting phenolic compounds with aldehydes with catalysis by metal salts whose cation can easily be precipitated as low-solubility salts in industrial processes. In this process, a disper... | 06/25/2002 |
| 6403237 | Polymeric fluorescent substance and organic electroluminescence device Provided is a high heat-resistant polymeric fluorescent substance having a divalent condensed polycyclic aromatic group of specific size having a bonding part at specific position shows fluorescence at a long wave length from orange to red, which is usefu... | 06/11/2002 |
| 6365704 | Polyacetal copolymer To provide a resin material in which various properties of a polyacetal resin such as excellent appearance, slidability and thermal stability are maintained and a rigidity is improved as well. That is, a polyacetal copolymer which is prepared by a copolym... | 04/02/2002 |
| 6362305 | Method for producing formaldehyde from methanol In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., a circulating gas stream comprising by-products of the dehydrogenation is passed throu... | 03/26/2002 |
| 6265528 | Preparation of polyoxymethylene dimethyl ethers by acid-activated catalytic conversion of methanol with formaldehyde formed by oxy-dehydrogenation of dimethyl ether A particularly useful process which includes the steps of providing a feedstream comprising a soluble condensation promoting component capable of activating a heterogeneous acidic catalyst and a source of formaldehyde formed by conversion of dimethyl ethe... | 07/24/2001 |
| 6140456 | Chemicals and processes for making fluorinated poly(para-xylylenes) New starting materials and chemical processes will be used to make fluorinated poly(para-xylylenes) (F-PPX) and fluorinated poly(para-fluoroxylylenes) (F-PPFX). The processes will use some very low cost and readily available starting materials, catalysts,... | 10/31/2000 |
| 6100368 | Process for production of acidic aqueous solutions of melamine-aldehyde polymer having low levels of free aldehyde This invention relates to a process for producing acidic aqueous solutions of melamine-aldehyde type polymers, and particularly melamine-formaldehyde polymer, which have significantly reduced levels of free aldehyde. The process involves the addition of h... | 08/08/2000 |
| 6063894 | Process for purifying polymers using ultrasonic extraction A process for purifying a substantially unoriented polymer containing an impurity by means of ultrasonic leaching or extraction is described. The process involves contacting a substantially unoriented polymer containing an impurity with a cavitatable liqu... | 05/16/2000 |
| 6037417 | Polypropylene composition useful for making solid state oriented film Disclosed is a polypropylene composition useful for making solid state oriented film. The composition comprises two predominantly isotactic polypropylenes with the melting point temperature of one of the polypropylenes being substantially lower than the m... | 03/14/2000 |
| 6031132 | Amide-group-containing polyacetal and its production process and use An amide-group-containing polyacetal, having acetal structure unit (1) of general formula (1) below in its molecule. This amide-group-containing polyacetal is usable as a detergent builder for detergent compositions. ##STR1## A production process of ... | 02/29/2000 |
| 5994455 | Process for the preparation of thermally stable polyoxymethylene copolymers A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the i... | 11/30/1999 |
| 5962623 | Process for the preparation of polyacetal copolymers A continuous process for the preparation of polyacetal copolymers from 1,3,5-trioxane and the comonomers known for this purpose using strong protic acids as an initiator, in which the initiator is added in an amount of 0.01 to 0.6 ppm, based on the total ... | 10/05/1999 |
| 5958398 | Biodegradable polyacetal polymers and methods for their formation and use The present invention relates to biodegradable biocompatible polyacetals, methods for their preparation, and methods for treating mammals by administration of biodegradable biocompatible polyacetals. A method for forming the biodegradable biocompatible po... | 09/28/1999 |
| 5932628 | Binder composition for production of molds and method of producing mold The binder composition for the production of molds of the present invention comprises a binder obtained by polycondensation of polycondensable components comprising as major components furfuryl alcohol, urea, and an aldehyde. In the binder contained in th... | 08/03/1999 |
| 5929197 | Acylsuccinic acid polyesters, a process for their preparation and their use in thermosetting plastics and coatings The present invention relates to a process for preparing acylsuccinic acid polyesters by reacting A) a polyester, which is the reaction product o i) maleic acid, maleic acid esters, maleic anhydride, fumaric acid and/or fumaric acid esters and optionally other... | 07/27/1999 |
| 5891983 | Water-soluble formaldehyde-free polycondensation products based on amino-s-triazines Water-soluble formaldehyde-free polycondensation products based on amino-s-triazines with at least two amino groups and glyoxylic acid, which contain as further component at least one amino compound and where the molar ratio of amino-s-triazine to glyoxyl... | 04/06/1999 |
| 5866670 | Process for preparing polyacetal copolymer A process for producing a polyacetal copolymer, which is extremely heat-stable and is extremely reduced in the quantity of unstable terminals even in a high polymerization yield in which trioxane as the principal monomer, comprises copolymerization of tri... | 02/02/1999 |
| 5856288 | Polyalkylene glycol-polyglyoxylate block copolymer, its production process and use A new block copolymer, which is excellent with regard to abilities such as dispersibility, chelatability, and scale inhibitability, includes a polyalkylene glycol structural unit and a polyglyoxylate structural unit. This block copolymer, for example, can... | 01/05/1999 |
| 5849858 | Resinous binder compositions Furfuryl alcohol/formaldehyde resins exhibiting high water compatibility and low amounts of volatile organic compounds such as furfuryl alcohol.... | 12/15/1998 |
| 5837781 | Thermally stable polyoxymethylene copolymer A polyoxymethylene copolymer prepared by copolymerizing a mixture comprising trioxane and 1,3-dioxolane in the presence of at least one polymerization catalyst selected from the group consisting of boron trifluoride, a boron trifluoride hydrate and a coor... | 11/17/1998 |
| 5811510 | Biodegradable polyacetal polymers and methods for their formation and use The present invention relates to biodegradable biocompatible polyacetals, methods for their preparation, and methods for treating mammals by administration of biodegradable biocompatible polyacetals. A method for forming the biodegradable biocompatible po... | 09/22/1998 |
| 5795507 | Preparation of pigmented melamine-formaldehyde polymer beads Spherical porous polymer pigment beads of melamine formaldehyde resin with uniform diameter were prepared by a water-in-oil emulsion polymerization of colored methylolmelamine aqueous solution. The dyes combined with methylolmelamine to give an excellent ... | 08/18/1998 |
| 5756599 | Binder resin, binder system, cellulosic composite articles, and method of making the same A process for producing a phenol-aldehyde (e.g., cresol-aldehyde) resin that is modified with a dihydroxybenzene compound. The resin may form a binder system when combined with a curing agent which includes an additional source of an aldehyde. The resin a... | 05/26/1998 |
| 5728797 | Method of making cured resin particles A suspension of finally divided hardened aminoplast or phenoplast resin, particularly melamine-formaldehyde resin, is prepared by mixing an aqueous solution of the resin or its precursors with a water-insoluble stabilizing agent, particularly microcrystal... | 03/17/1998 |
| 5708121 | Storage stable melamine-modified phenolic resole resins using an alkaline condensation and polyhydroxyl compound stabilization This invention relates to an emulsifiable melamine-modified phenolic resole resin composition useful as a binder for glass fibers. The invention is more particularly directed to the process of preparing the resole resin composition using an alkaline conde... | 01/13/1998 |
| 5705605 | Process for the preparation of a dyeing auxiliary There is described a process for the preparation of basic poIycondensates, which comprises (a) reacting an amine of formula ##STR1## wherein R1, R2, R3 and R4 are each independently of one another hydrogen ... | 01/06/1998 |
| 5691426 | Resin composition A resin composition useful as a binder is provided comprising a mixture of a formaldehyde-based resin with a resin substitute comprising the reaction product of an amine derivative chosen from melamine, glycolurile or their mixtures with 1 to 2 moles of a... | 11/25/1997 |
| 5686554 | Process for the manufacture of paraformaldehyde The process comprises providing a formaldehyde solution at a concentration of 80-89%; heating the solution to a temperature of 80°-100° C.; pouring the heated solution over heated zones on a metal belt conveyor travelling from the heated zones to other,... | 11/11/1997 |
