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| Number | Title | Issue Date |
| 7399810 | Polymerization of monomers with differing reactivities There is provided a process for producing a polymer comprising the steps of (a) adding at least one low-reactivity monomer to a reaction vessel with a decreasing rate of addition, (b) adding at least one high-react... | 07/15/2008 |
| 7375148 | Method for producing aqueous styrene-butadiene-iv polymer dispersions A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M comprising styrene, butadiene, and if desired up to 30% by weight, based on 100% by weight of monomers, of ethylenically un... | 05/20/2008 |
| 7351754 | Water-based ink A water-based ink comprising a colorant and a water-insoluble polymer having at least two hydroxyl groups at its end; a water-based ink comprising a water-insoluble polymer having an ionic group at its end and a pigment; and a process for preparing a water-based ink... | 04/01/2008 |
| 7342087 | Method for prevention of increase in particles in copolymer for semiconductor resist A method for prevention of increase in particles in copolymer for semiconductor resist, which comprises passing, through a filter containing a resin having an amino group and/or an amide bond a copolymer solution for semiconductor resist which contains a copolymer f... | 03/11/2008 |
| 7265191 | Multi-functional admixtures for hydraulic cement compositions A multi-functional admixture for simultaneously providing specified characteristics to hydraulic cement compositions such as concrete contains one or more of specified reaction mixtures obtained by specified two processes as well as partially or completely neutraliz... | 09/04/2007 |
| 7169867 | Catalyst for bulk polymerization A catalyst for bulk polymerization of a polymerizable unsaturated compound of the invention comprises a compound having at least one thiol group and a secondary hydroxyl group and represented by the following formula (I): ... | 01/30/2007 |
| 7045582 | Preparation process of copolymer for semiconductor lithography and a copolymer for semiconductor lithography available by this process Provided are a preparation process of a copolymer for semiconductor lithography, suited for a film forming composition used for the formation of minute patterns necessary for semiconductor fabrication, which comprises carrying out radical polymerization of at least ... | 05/16/2006 |
| 6984706 | Diene rubber, process for production thereof, rubber compositions, process for producing the same, and crosslinked rubbers A diene rubber (A) having a weight average molecular weight (Mw) of 100,000 to 3,000,000, an Mw/number average molecular weight (Mn) ratio of 1.30 to 2.50, and an Mw/peak top molecular weight (Mp) ratio 0.70 to 1.30. A rubber composition comprising the diene rubber ... | 01/10/2006 |
| 6936666 | Continuous gas-phase polymerization process Continuous gas-phase polymerization process for preparing ethylene and propene homopolymers and copolymers, in which ethylene, propene or mixtures comprising ethylene or propene and C3-C8-α-monoolefins are polymerized in the polymerization zon... | 08/30/2005 |
| 6897269 | Processes for transitioning between Ziegler-Natta and alumoxane-based single-site polymerization catalysts Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning among olefin polymerization reactions utilizing Ziegler-Natta catalyst systems,... | 05/24/2005 |
| 6884855 | Sulfurized polyisobutylene based wear and oxidation inhibitors Sulfurized olefin compositions and components are prepared from sulfurizing high methylvinylidene polyisobutylene(s) having at least 25% methylvinylidene and a number average molecular weight in the range of about 120 to about 600, at suitable temperatures and press... | 04/26/2005 |
| 6806331 | Process for bulk polymerization using a catalyst A catalyst for bulk polymerization of a polymerizable unsaturated compound comprises a compound having at least one thiol group and a secondary hydroxyl group and represented by the following formula (I): wherein R | 10/19/2004 |
| 6794466 | Shear thinning vinyl acetate based polymer latex composition, especially for adhesives The present invention elates to a vinyl acetate based polymer latex composition obtained by emulsion polymerization of: (a) polyvinyl alcohol, (c) a monomer mixture comprising vinyl acetate, and (d) optionally one or more additional co-monomer(s), ... | 09/21/2004 |
| 6784262 | Processes for chemically-modifying the surface of emulsion polymer particles Processes for chemically-modifying the surface of an emulsion polymer particle are provided which include providing an aqueous emulsion polymer, a monomer at a level of at least 0.5% by weight based on the weight of the emulsion polymer and a, surface-modifying chem... | 08/31/2004 |
| 6777385 | Low-Molecular (meth)acrylicacid(salt)-based polymer and its production process and uses A low-molecular (meth)acrylic acid (salt)-based polymer having a good color tone is obtained by polymerizing an aqueous solution of at least one monomer component of a high concentration in the presence of an alkaline substance, wherein: 100 to 95 mol % of the at le... | 08/17/2004 |
| 6642337 | Stabilized cyanoacrylate adhesives The problem addressed by the invention was to find an anionic polymerization inhibitor for cyanoacrylate adhesives containing one or more cyanoacrylates, stabilizers against anionic and radical polymerization and auxiliaries typically used in such adhesiv... | 11/04/2003 |
| 6596824 | Method for producing polyolefin and gas phase polymerization apparatus Provided is a continuous vapor-phase polymerization method for producing polyolefins. In the method, polymer agglomerates and aggregates are prevented from being formed, and polymer deposition on the wall of reactors and around stirring blades is prevente... | 07/22/2003 |
| 6239199 | Resin composition resin molding and method for inhibiting polymerization of vinyl compound Disclosed are a resin composition for inhibiting polymerization of a vinyl compound, which includes a resin and 0.1 to 30% by weight based on the resin, of a polymerization inhibitor for the vinyl compound; a resin molding for inhibiting polymerization of... | 05/29/2001 |
| 6207751 | Semicarbazide derivative and a coating composition containing the same Disclosed is a semicarbazide derivative represented by formula (1) or a terminal-blocked form thereof: ##STR1## wherein R1 represents a terminal isocyanate group-free polyisocyanate residue or a terminal isocyanate group-free triisocyanate resi... | 03/27/2001 |
| 6103789 | Hydrosoluble acrylic copolymers Acrylic copolymers containing the following repeating units: ##STR1## wherein RA, RB, RC, RI, RII, equal or different, are H or CH3 ; M+ is H or a cation belonging to group IA, I... | 08/15/2000 |
| 5880230 | Shortstop agents for vinyl polymerizations The present invention relates to a method of terminating a free-radical initiated emulsion polymerization by utilizing a shortstopping agent that contains a stable nitroxyl free-radical or is capable of forming a stable nitroxyl free radical in situ. Besi... | 03/09/1999 |
| 5807941 | Unsaturated nitrile-conjugated diene copolymer process for producing same and vulcanizable rubber composition An saturated nitrile-conjugated diene copolymer obtained by copolymerizing acrylonitrile with butadiene in the presence of a free radical initiator and an alkylthiol compound as a molecular weight modifier. A part of the molecular weight modifier is incor... | 09/15/1998 |
| 5773544 | Polychloroprene composition Crystalline polychloroprene compositions comprise mercaptan-modified or xanthogen disulfide-modified 2-chloro-1,3-butadiene homopolymers having gel contents of 5-80 percent by weight. The polymers are prepared by free radical emulsion polymerization at a ... | 06/30/1998 |
| 5548042 | Process for the production of polypropylene A process comprising contacting propylene in two reaction zones connected in series, under gas phase polymerization conditions, with a transition metal catalyst system comprising (a) introducing the catalyst into the first reaction zone; (b) partially deactiva... | 08/20/1996 |
| 5530080 | Polymethacrylate molding compound with high heat deflection temperature and stability against thermal degradation The invention relates to a polymerization process for the production of polymethacrylate molding compounds having high heat deflection temperature and high stability against thermal degradation, are prepared by polymerizing methacrylate monomer in a react... | 06/25/1996 |
| 5504168 | Process for shortstopping emulsion polymerizations which does not generate nitrosamines Method for the shortstopping of polymerizations of conjugated dienes possibly mixed with vinyl-substituted aromatic products in a radicalic emulsion polymerization process using a redox initiator, in particular radicalic emulsion polymerizations of butadi... | 04/02/1996 |
| 5475074 | Polymerizable composition, organic glass and ophthalmic lens A polymerizable composition containing; (A) 100 parts by weight of a vinylbenzyl compound of the formula (I), ##STR1## wherein each of R1 and R2 is independently a halogen atom, each of h and i is independently 0, 1 or 2, each of X | 12/12/1995 |
| 5455321 | Process for producing high molecular weight monovinylidene aromatic polymers A process for producing a monovinylidene aromatic polymer having molecular weight (Mw) greater than 275,000 which comprises polymerizing a monomer mixture comprising a monovinylidene aromatic monomer in the presence of: A) from 10 to 2000 ppm by weight of at l... | 10/03/1995 |
| 5448000 | End-quenching the living polymerization of isobutylene with acetyl sulfate A one-pot method of preparing sulfonic acid-terminated polyisobutylene by sulfonation with acetyl sulfate of living polyisobutylene in a single step. The method permits preparation of sulfonated telechelic polyisobutylenes (STPs) by "inifer" initiated car... | 09/05/1995 |
| 5444140 | Starve fed emulsion polymerization process Simultaneous control of the molecular weight and the molecular weight distribution in the production of toner resins can be accomplished by using a starve fed emulsion polymerization process, which includes: selecting a desired molecular weight and molecu... | 08/22/1995 |
| 5432242 | HP catalyst killer A process for preparing olefinic polymers by metallocene catalyzed olefin polymerisation in which at least one volatile catalyst kill agent is introduced. A non-volatile catalyst kill agent may also be used in conjunction with the volatile catalyst kill a... | 07/11/1995 |
| 5391665 | Process for producing polymer having hydroxyl groups at both terminals There are provided a process for obtaining a polymer having hydroxyl groups at both terminals easily and with cheap cost and excellent efficiency from a wide variety of vinyl-based compounds, a composition containing said polymer and its use, and a polyme... | 02/21/1995 |
| 5216065 | Emulsion polymerization with large particle size A process for emulsion polymerization to form a latex having a particle size greater than about 0.5 micrometers by charging to a reaction vessel under agitation a reaction mixture including water, emulsifiers at an initial concentration slightly greater t... | 06/01/1993 |
| 5194486 | Adhesive Novel adhesive products are prepared by coating a novel adhesive formulation onto appropriate substrates. The adhesive formulation is capable of maintaining coatable viscosity at solids levels in excess of 58% and may comprise an interpolymer prepared in ... | 03/16/1993 |
| 5177164 | Process for shortstopping an emulsion polymerization A process for shortstopping a free radical polymerization of a conjugated diene and optionally a vinyl-substituted aromatic in an aqueous emulsion, using a hydroperoxide as initiator and a redox activator, comprising a divalent transition metal, a reducin... | 01/05/1993 |
| 5159032 | Process for terminating the polymerization of vinyl chloride with an aqueous dispersion of an antioxidant containing a polyoxyalkylene oxide A process for preparing a vinyl chloride polymer, which comprises polymerizing vinyl chloride or a monomeric mixture composed mainly of vinyl chloride in an aqueous medium, wherein the polymerization reaction is terminated at the last stage of polymerizat... | 10/27/1992 |
| 5089601 | Chloroprene polymer A chloroprene polymer having dithiocarbamate groups at both terminals, represented by the following formula (I): ##STR1## wherein M1 is a chloroprene monomer residue; X is a group represented by the following formula (II): ##STR2## ... | 02/18/1992 |
| 5066736 | Gas-phase alpha-olefin polymerization process in the presence of an activity retarder A process for the continuous polymerization of one or more alpha-olefins with a transition metal catalyst, in a reactor having a fluidized and/or mechanically stirred bed, in which a very small amount of an activity retarder, generally less than 0.1 ppm, ... | 11/19/1991 |
| 5066770 | Process and apparatus for manufacturing polymers A process for manufacturing a polymer includes the first step of reacting a solution of one of two starting materials in an organic solvent with the other material in the form of a powder, and the second step of reacting a solution of the reaction product... | 11/19/1991 |
| 4985513 | Conjugated diene copolymer, process for producing the same, and photosensitive resin composition comprising the same A conjugated diene copolymer comprising (A) 40 to 90 mole % of a conjugated diene component, (B) 0.5 to 10 mole % of an alpha,beta-ethylenically unsaturated carboxylic acid component, (C) 0.1 to 5 mole % of a polyfunctional alkenyl compound component and ... | 01/15/1991 |
