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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 NO 2 group, a SO...
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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...
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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 [R a Si(O (3-a)/2)-R 1 -X-(R 1 -Si(O (3-a)/2))...
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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...
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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...
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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 α-hydrogens to act as an...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 CH 3 , R 1 is a saturated hydrocarbon chain containing 1-6 carbon...
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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.
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4035563 |
Method of suspension polymerizing vinyl chloride with salts of nitrous acids and polyvalent metal salts
A method of suspension polymerizing in an aqueous medium vinyl chloride or a mixture of 50% or more vinyl chloride and remainder other monomers copolymerizable therewith in the presence of an oil...
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3988506 |
Process for producing chloroprene elastomer
A process for producing a chloroprene elastomer, which comprises copolymerizing in the presence of a radical catalyst 80 to 95 parts by weight of 2-chlorobutadiene-1,3 containing less than 0.95% by...
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3966696 |
Process for producing vinylchloride resin having a highly porous uniform granular structure
A process for suspension polymerization of vinyl chloride or a mixture of vinyl chloride and a monomer copolymerizable therewith in an aqueous medium in the presence of an oil-soluble...
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3929753 |
Method for producing high bulk density polyvinyl chloride
A method for producing polyvinyl chloride having a high bulk density, superior gelling property and superior processability by suspension polymerization of vinyl chloride monomer or a mixture of...
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3919140 |
Process for producing acrylamide polymers in an acetone-water solvent system
A process for producing acrylamide polymers involves polymerization of acrylamide or methacrylamide or polymerizable monovinylic monomers containing predominantly acrylamide or methacrylamide in a...
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3914340 |
Block copolymerization with azoamidino compounds as initiator
This invention comprises novel amidino type reaction products of azodiimidoether hydrogen halides with hydrocarbon diamines in various ratios, some of said reaction products incorporating...
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3914206 |
Terpolymer-butadiene-carboranyl methacrylate, and acrylic acid
The terpolymer comprised of butadiene, carboranyl methacrylate, and acrylic cid is disclosed along with a method for preparation. The terpolymer is useful as a combination binder and catalyst for...
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3884890 |
Preparation of transparent and thermostable copolymers
Low pressure polymerization of a vinyl halide with 4-methyl pentene-1 is disclosed. The reaction is conducted in an oxygen-free atmosphere at a pressure not in excess of 150 atmospheres absolute at...
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3884864 |
Process for preparation of nonflammable water-containing polymer material from basic salts of polymerizable mixtures of ethylenically unsaturated phosphates
Process for preparation of nonflammable water-containing polymer material characterized by adding water to a mixture of A and B or A, B and C wherein A is a basic salt of a polymerizable mixture of...
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3846390 |
PROCESS FOR PRODUCING POLYVINYL CHLORIDE IN THE PRESENCE OF ALKYL THIOGLYCOLATE AS A CHAIN TRANSFER AGENT
When vinyl chloride or a monomeric mixture of vinyl chloride and an other ethylenically unsaturated monomer copolymerizable therewith is subjected to polymerization in the presence of a alkyl...
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3755246 |
PROCESS FOR MANUFACTURING POLYVINYL FLUORIDE WITH IMPROVED THERMOSTABILITY
Improvements in polyvinyl fluoride obtained by adding iodine or an iodine compound to the vinyl fluoride monomer prior to or during polymerization thereof and for adding iodine or an iodine...
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3539543 |
PROCESS FOR POLYMERIZING VINYLAROMATIC COMPOUNDS IN SUSPENSION
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3536684 |
COPOLYMERIZATION WITH AZO CATALYST OF 2-PHENYL ALLYL ALCOHOL AND STYRENE AND SOLID COPOLYMERS THEREOF
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3497486 |
PROCESS FOR PRODUCING SOLID HOMOPOLYMERS OF 2-PHENYL ALLYL ALCOHOL BY POLYMERIZATION WITH AZO CATALYST
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