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| Number | Title | Issue Date |
| 8084561 | Process for preparing acrylate copolymers The present invention relates to a method of producing polymers by free-radical polymerization in solution, wherein the polymerization initiator used is an ethanol-soluble initiator, and the solution polymerization is carried out in an alcoholic solvent which compri... | 12/27/2011 |
| 7098280 | Controlled polymerization The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepare... | 08/29/2006 |
| 6992156 | Controlled polymerization The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepare... | 01/31/2006 |
| 6946530 | Process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor The present invention relates to a process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor wherein fouling is prevented and/or flowability of polymer is improved thanks to the use of a process aid additive. ... | 09/20/2005 |
| 6872779 | Polymeric flocculant and method of sludge dehydration The invention provides a flocculant which in sludge dewatering gives flocs having an excellent balance among flocculating strength, filtration rate and moisture content, and a method of sludge dewatering with the flocculant. Namely, the flocculant is a polyme... | 03/29/2005 |
| 6852812 | Latex having a high solids content and a low viscosity and exhibiting a bimodal distribution A process is presented for the preparation of a latex by the emulsion polymerization at a temperature of between 30 and 90 C. of at least one ethylenically unsaturated monomer in the presence of at least one surfactant and of a seed of polymer particles with a diame... | 02/08/2005 |
| 6844405 | (CO)polymerization of vinyl chloride in the presence of a stable nitroxyl radical The present invention pertains to a process for controlled free radical polymerization or copolymerization of vinyl chloride at a temperature between 40° C. and 95° C., at a pressure between 5 and 30 bar in the presence of a stable free nitroxyl radical. ... | 01/18/2005 |
| 6747124 | Process for working up emulsion polymers A process for working up polymer components prepared by emulsion polymerization is disclosed. The process is characterized in that coagulation of the aqueous polymer latex present after emulsion polymerization is performed using a combination of A) an aqueous soluti... | 06/08/2004 |
| 6737485 | Titanium chelate dispersions A composition and a process for producing the composition are disclosed. The composition comprises a titanium chelate polymer and a stabilizer. The process can comprise (1) contacting a tetraalkyl titanate with a chelating agent to produce a product mixture comprisi... | 05/18/2004 |
| 6632869 | Process for preparing polymer dispersions with a high solids content A process for preparing copolymers based on vinyl esters and ethylene and, if desired, further comonomers in the form of their aqueous dispersions, having a solids content of greater than 65% and a Brookfield viscosity (20 s-1) of less than 10,... | 10/14/2003 |
| 6624268 | Aqueous dispersion for water-and-oil repellant and process for producing the same A water and oil repellent aqueous dispersion is provided which is excellent in water and oil repellency and waterdrop rolling property and has dispersion stability even in the presence of co-agents and contaminants in the treatment bath. A preparative pro... | 09/23/2003 |
| 6552140 | Auto-oxidation systems for air-activatable polymerisable compositions An air-activatable polymerisable composition useful, in the field of adhesives, sealants, surface coatings, moulding resins and composite matrices, comprises: a) at least one free-radically polymerisable monomer, b) an activator system for effective polym... | 04/22/2003 |
| 6395849 | Processes for producing N,N-dialkylallylamine polymers and N,N-dialkyllylamine polymers The present invention relates to processes for industrially advantageously producing, in high yields, an N,N-dialkylallylamine polymer or an addition salt thereof, a copolymer of N,N-dialkylallylamine and monoallylamine or an addition salt thereof, and a ... | 05/28/2002 |
| 6331587 | Polyvinyl ester dispersions and methods for their preparation Polyvinyl ester dispersions which can be employed as binders in building materials, preferably in the form of redispersible plastics powders, are obtained by polymerization of at least one vinyl ester and optionally other monomers which can be copolymeriz... | 12/18/2001 |
| 6248838 | Chain entanglement crosslinked proppants and related uses A rigid chain entanglement crosslinked polymer made by dispersing at lease one monomer and at least one initiator in an immiscible liquid medium to form a liquid dispersion; and decomposing the initiator in the fluid dispersion to activate polymerization ... | 06/19/2001 |
| 6013747 | Polymerization process in suspension Use of surfactants in the suspension polymerization of fluorinated monomers for preparing fluoropolymers containing hydrogen, said surfacants having the general formula: Rf --[L--(OCHR1 --CHR2)m --OZ)]i wh... | 01/11/2000 |
| 5698647 | Preparation of polymers based on basic vinyl monomers A process for the preparation of low-hydrazine polymers based on basic vinyl monomers by free-radical solution polymerization in aqueous medium in the presence, as compound which forms free radicals, of an azo compound which has alkoxycarbonyl groups on t... | 12/16/1997 |
| 5668229 | Process for preparing high-molecular weight acrylamide polymer A process for preparing an acrylamide polymer is herein disclosed which comprises the step of initiating polymerization in the presence of an oxidation-reduction system polymerization initiator comprising two or more kinds of oxidizing agents and a reduci... | 09/16/1997 |
| 5605992 | Emulsion polymerization inhibitor and suspension polymerization method using the agent A suspension polymerization of a polymerizable monomer in the presence of an emulsion polymerization inhibitor is disclosed. The inhibitor is an aromatic series compound having a NO2 group, a SO3 Na group, and a secondary amino group... | 02/25/1997 |
| 5552498 | Preparation of amphoteric acrylic acid copolymers suitable as oil-in-water emulsion breakers The invention comprise a composition for breaking oil-in-water emulsions comprising adding from about 1 part per million to about 500 parts per million of an amphoteric acrylic acid copolymer to the emulsion. Once the copolymer is added, the emulsion is s... | 09/03/1996 |
| 5523365 | Graft copolymers of organopolysiloxanes as free radical macroinitiators The invention relates to crosslinked organopolysiloxanes which contain groups which form free radicals and are built up from units of the formula [Ra Si(O.sub.(3-a)/2)-R1 -X-(R1 -Si(O.sub.(3-a)/2))b Ra ] ... | 06/04/1996 |
| 5258466 | Paper size Emulsion polymers which are prepared by free-radical polymerisation of monomers in the presence of a) polymers of the formulae ##STR1## wherein the radicals have the meanings given in the description, and b) low-molecular anionic emulsifiers, are ou... | 11/02/1993 |
| 5244475 | Rheology controlled emulsion An emulsion composition with a polymerizing and/or crosslinking agent and method for its use in improving the manufacturing, packaging, transporting, storage placement and blasting characteristics of explosives containing an emulsion. More specifically, c... | 09/14/1993 |
| 5045614 | Process for polymerizing vinyl monomers using amine containing compounds which simultaneously act as initiators and crosslinking agents as part of a redox initiator system This invention relates to an improved process for polymerizing vinyl monomers, the improvement comprising using an amine having a functionally effective amount of -hydrogens to act as an initiator site and as a crosslinking site for development of ... | 09/03/1991 |
| 4857406 | Microcapsules with polysalt capsule walls and their formation The present invention provides a process for forming microcapsules having discrete capsule walls. An emulsion of an oily core material in a continuous aqueous phase containing a polymeric anionic emulsifier, a free radical addition polymerizable cationic ... | 08/15/1989 |
| 4816539 | Process for producing vinyl chloride copolymer A vinyl chloride copolymer is produced by copolymerizing vinyl chloride monomer or a monomer mixture comoposed of vinyl chloride monomer and copolymerizable monomer, with one or more than one kind of cross-linking agent selected from polyhydric alcohol di... | 03/28/1989 |
| 4739008 | Bi-phase initiator system for water-in-oil emulsion polymers Water-in-oil emulsions of monomers which form water-soluble polymers are polymerized in the presence of a biphase initiator system containing both an oil-soluble initiator and a water-soluble initiator or activator or alternatively a water-soluble initiat... | 04/19/1988 |
| 4701494 | Process for the preparation of water-soluble vinyl saccharide polymers This invention provides a process for the preparation of water-soluble vinyl saccharide polymers by polymerization of at least one water-soluble monovinyl saccharide monomer in water at a temperature in the range of from 10° C. to 90° C., characterized ... | 10/20/1987 |
| 4540760 | Process for producing polymers of monoallylamine In a process for producing a polymer of monoallylamine comprising polymerizing monoallylamine, the polymerization is carried out using as a monomer inorganic acid salts (e.g., hydrochloride, sulfate, etc.) of monoallylamine in the presence of an azo type ... | 09/10/1985 |
| 4540754 | Process for producing high molecular weight acrylonitrile polymers In the suspension polymerization of acrylonitrile in an aqueous medium, the polymerization is conducted in the presence of a water-soluble polymer and an oil soluble radical initiator while maintaining the acrylonitrile concentration higher than 9 weight ... | 09/10/1985 |
| 4528347 | Process for producing polymers of monoallylamine In a process for producing a polymer of monoallylamine comprising polymerizing monoallylamine, the polymerization is carried out using as a monomer inorganic acid salts (e.g., hydrochloride, sulfate, etc.) of monoallylamine in the presence of an azo type ... | 07/09/1985 |
| 4504640 | Process for producing monoallylamine polymer By polymerizing an inorganic acid salt of monoallylamine in a polar solvent in the presence of a radical initiator having, in its molecule, an azo group and a group having cationic nitrogen atom, a polymer of monoallylamine having a high degree of polymer... | 03/12/1985 |
| 4321348 | Copolymers of N-vinyl pyrrolidone and a vinylic, allylic or methallylic ester of a cyclic - or ଲ-carboxylic acid; and cosmetic compositions containing the same A copolymer of N-vinyl pyrrolidone and a vinylic, allylic or methallylic ester of a cyclic - or ଲ-carboxylic acid is employed as a cosmetic film forming resin in cosmetic compositions for the hair, including hair setting lotions and lacquers,... | 03/23/1982 |
| 4251651 | Amphoteric polyelectrolyte An amphoteric polyelectrolyte which is useful as a paper additive capable of imparting dry strength to paper, a high molecular flocculant, a high molecular dehydrating agent or the like is prepared by copolymerizing a cationic vinyl monomer such as ³... | 02/17/1981 |
| 4232141 | Method for the preparation of vinyl chloride polymers An improved method for the polymerization of vinyl chloride or a monomer mixture mainly composed of vinyl chloride in an aqueous polymerization medium is proposed in which a water-insoluble polymerization initiator, being solid at room temperature as disp... | 11/04/1980 |
| 4215028 | Thermosetting resin, and its production and use A thermosetting resin of self cross-linking type which is prepared by polymerization of at least one polymerizable monomer having an ampho-ion structure, at least one polymerizable monomer containing an oxirane group and at least one other monomer and can... | 07/29/1980 |
| 4129708 | Polyacrylate elastomer compositions A vulcanizable polyacrylate elastomer composition having improved resistance to hydrocarbon oils is provided which comprises one or more lower alkyl acrylic acid ester monomers polymerized with a comonomer containing either a halogen or an epoxy group, in... | 12/12/1978 |
| 4097662 | Co-polymers of butadiene and carboranyl methacrylate A co-polymer comprised of butadiene and carboranyl methacrylate is disclo along with a method for preparation. The co-polymer is used as a combination plasticizer and catalyst for solid propellants. It is prepared by an emulsion polymerization process.... | 06/27/1978 |
| 4070533 | Terpolymer of (a) crotonic acid (b) vinyl acetate and (c) allyl or methallyl esters Terpolymer of crotonic acid, vinyl acetate and an allyl or methallyl ester having the formula ##STR1## wherein R' is hydrogen or CH3, R1 is a saturated hydrocarbon chain containing 1-6 carbon atoms and R2 is --CH... | 01/24/1978 |
| 4055713 | Iodine molecular weight regulators in suspension polymerization systems Iodine or organic iodides are effective in suspension polymerization systems as molecular weight regulators or modifiers. These modifiers are especially suited for the suspension ABS processes.... | 10/25/1977 |
