Matches 1 - 50 out of 118 1 2 3 >


Match Document Document Title
8168723 Brominated styrenic polymers and their preparation  
Preparing brominated styrenic polymer by maintaining a mixture formed from (i) brominating agent, (ii) a solvent solution of styrenic polymer, and (iii) aluminum halide catalyst, at −20 to +20° C....
8114943 Process for brominating butadiene/vinyl aromatic copolymers  
Butadiene copolymers are brominated in solution using bromine as the brominating agent. The bromination is conducted in the presence of an excess of an aliphatic alcohol, relative to the amount of...
8071688 Brominated anionic styrenic polymers and their preparation  
Concurrently fed into a reaction zone held at about 10° C. or less are brominating agent, aluminum halide catalyst, and a solution of anionic styrenic polymer having a GPC Mn about 2000-30,000. ...
7897696 Process for the preparation of polyalkenyl succinic anhydrides  
A polyalkenyl succinic anhydride is prepared with low amounts of resinous or chlorinated byproducts in a two-step process whereby a polyalkene is first reacted with an unsaturated organic acid in a...
7662887 Method of forming polyalkene substituted carboxylic acid compositions  
The residual chlorine content of a polyolefin-substituted carboxylic acylating agent formed by a halogen-assisted reaction of a polyalkene and at least one olefinic, monounsaturated mono- or...
7638583 Brominated anionic styrenic polymers and their preparation  
Concurrently fed into a reaction zone held at about 10° C. or less are brominating agent, aluminum halide catalyst, and a solution of anionic styrenic polymer having a GPC Mn about 2000-30,000. ...
7632893 Brominated styrenic polymers and their preparation  
Preparing brominated styrenic polymer by maintaining a mixture formed from (i) brominating agent, (ii) a solvent solution of styrenic polymer, and (iii) aluminum halide catalyst, at −20 to +20° C....
7612148 Hydrogenation catalyst composition and method for hydrogenation of conjugated diene polymer  
A method for hydrogenation of a conjugated diene polymer is provided. The conjugated diene polymer in an inert organic solvent is brought into contact with hydrogen in the presence of a...
7550539 Partially neutralized chlorosulfonated polyolefin elastomers  
At least partially neutralized chlorosulfonated ethylene/alpha-olefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from...
7446153 Preparation of brominated styrenic polymers or resins  
Bromination of styrenic polymer is carried out in a closed reaction system to retain HX coproduct (where HX is HBr or HCl, or both) in the bromination reaction mixture at superatmospheric pressure....
7432332 Polymer halogenation process with catalyst recovery  
The present invention relates to a method for recovering antimony catalysts wherein the formation of insoluble solids is reduced.
7014781 Methods and articles for maintaining hydantoinylated polymers in a biocidally active state  
A composition and the method for sustaining the biocidal activity of chlorinated polystyrene hydantoin beads. The method comprises supplying a continuous low level halogen concentration to the...
6852802 Organic polymer material, process for producing the same, and heavy-metal ion remover comprising the same  
An object of the present invention is to provide a heavy metal ion scavenger having more excellent scavenging performance than previously. In order to attain this object, organic polymer materials...
6767960 Process for preparing high impact vinyl aromatic polymer by continuous anion polymerization method  
The present invention is to provide a continuous anion polymerization method for preparing transparent high impact vinyl aromatic polymer comprising the steps of: i) charging and polymerizing vinyl...
RE37902 Brominated polystyrene having improved thermal stability and color and process for the preparation thereof  
In a process for the suppression of backbone halogenation during the bromination of polystyrenes comprising the step of pretreating a solution of a polystyrene reactant comprising from about five...
6426391 Fluorination in liquid or supercritical carbon dioxide  
A method of fluorinating a substance comprises providing a reaction mixture comprising a liquid or supercritical carbon dioxide reaction medium, a first reactant, and a second reactant, wherein the...
6388018 Graft copolymers containing ionomer units  
Graft copolymers having cationic units pendant to the backbone chain are disclosed. These polymers are prepared by reacting a polymer containing halogenated para-methylstyrene units in the chain,...
6207765 Process for brominated styrenic polymers  
This invention relates to the bromination of styrenic polymers by contacting same with a brominating agent in the presence of a bromination catalyst and, as a reaction solvent, bromochloro-methane.
5977233 Brominated syndiotactic polystyrene and the use thereof  
The present invention provides a method of producing a flame-retardant polymer comprising mixing one or more polymeric base resins with a source of brominated syndiotactic polystyrene that displays...
5824767 Poly(arylene sulfide) compositions having improved processability  
A process for improving the processability of poly(arylene sulfide) in melt spinning operations by treatment with a barium-containing compound and, optionally, a lubricant is disclosed.
5637650 Brominated polysytrene having improved thermal stability and color and process for the preparation thereof  
In a process for the suppression of backbone halogenation during the bromination of polystyrenes comprising the step of pretreating a solution of a polystyrene reactant comprising from about five...
5616622 Crosslinked seeded copolymer beads and process of manufacture  
Seeded cation-exchange resin beads are particularly susceptible to oxidative degradation which results in the leaching of organic carbon fragments. The leachability of organic carbon fragments of...
5616656 Method for making brominated syndiotactic styrenic polymers  
The present invention provides a new method for making an improved flame-retardant additive comprising a brominated syndiotactic styrenic polymer. The method includes the steps of providing a...
5569723 Process for the bromination of alkyl rubbers  
C4 -C16 alkyl rubbers are brominated by reacting the alkyl rubbers with bromine in the presence of organic azo compounds and/or alkali metal and/or alkaline earth metal hypochlorites and in the...
5548029 Graft copolymers of para-alkylstyrene/isoolefin copolymers  
Graft copolymers which are isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R' can be hydrogen, alkyl, and the primary and secondary alkyl halides, "a"...
5539059 Perfluorinated polyethers  
This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.
5532322 Process for preparing brominated polystyrene  
Disclosed is a process for preparing a brominated polystyrene, which comprises reacting a polystyrene dissolved or dispersed in a halogenated hydrocarbon type solvent, with a brominating agent in...
5373064 Process for producing chlorinated polyolefin in an aqueous suspension system comprising a metal salt of an alkyldiphenyl ether disulfonic acid  
When chlorinating a polyolefin in an aqueous suspension system, a metal salt of an alkyldiphenyl ether disulfonic acid represented by the following formula [I], or together with an anionic...
5362817 Polyisobutylene based block copolymers  
A process for preparing linear block and three arm star block copolymers having blocks of polyisobutylene and blocks of anionically polymerizable monomers comprises mixing a first solution of a...
5340552 Reactive matrix for removing impurities from hydride and inert gases and process  
A macroreticulate polymer is provided for removing water vapor and oxidants from a gas having the formula: ##STR1## wherein Ar is a heteroaromatic moiety, M is bonded to the heteroaromatic moiety...
5314968 Disinfecting resin  
A polyhalide bactericidal resin, of the demand type, based on halogens, the preponderant being iodine. The release of iodine into the water which is purified is minimized, and contaminated water is...
5286804 Halogenation of star-branched butyl rubber with improved neutralization  
A process for halogenating star-branched butyl rubber is provided wherein water and a wetting agent or wetting agent precursor are added to a solution comprising the star-branched butyl rubber,...
5220087 Preparation of strong and super acid catalysts using elemental fluorine  
A fluorinated cation exchange resin catalyst is prepared by contacting a polymer containing pendant acid groups, particularly the radical --SO3 X with elemental fluorine in the presence of a...
5087674 Acid scavenged polymer halogenation  
A process for halogenating polymers by contacting a polymer either in solution or in bulk with a halogenating agent in the presence of an acid scavenger. Halogenated polymer, e.g., butyl rubber,...
5077345 Halogenation of polymers with improved neutralization  
A halogenation process is provided for halogenating a polymer, in which process the halogenation reaction product is neutralized by reaction of an aqueous alkaline material in the presence of a...
5068290 Process for the chlorination of polyolefins  
A process for the chlorination of a polyolefin is provided in accordance with the present invention. This process comprises mixing an anti-coagulant with a finely divided polyolefin, and then...
5051256 Biocidal complex and dressing formed therefrom  
A novel complex of polypyrrolidone, also known as nylon-4, and iodine is disclosed. The complex has biocidal properties exhibiting especially the fungicidal and bactericidal properties of free...
4975496 Process for brominating aromatic resins  
Styrenic polymers are brominated by a process comprising dispersing at least one Lewis acid catalyst in at least one inert halogenated solvent and contacting said Lewis acid catalyst dispersion...
4972026 Chlorinated terpolymers of ethylene  
A chlorinated terpolymer of a precursor terpolymer containing 3-20 weight percent acrylic acid or methacrylic acid, 3-20 weight percent vinyl acetate and 60-90 weight percent ethylene contains...
4933395 Process for imidizing vinyl-aromatic copolymers  
Process for the imidization of vinyl-aromatic copolymers containing maleic anhydride, using as an imidizing agent an amide, the imidization being conducted in an anhydrous state and in the presence...
4879353 Bromination of polystyrene using bromine as the reaction solvent  
A process for the bromination of polystyrenic homo- and co-polymers using bromine as the reaction medium, bromine chloride as the bromination reagent and a Lewis acid catalyst substantially...
4772421 Process for producing electroconductive resin composite  
An electroconductive resin composite is produced by polymerizing at least one monomer a polymer of which is electroconductive in a matrix of a resin which exhibits the anisotropy in the melt phase...
4703091 Halogenated butyl rubber  
An improved halogenated butyl rubber wherein the polymer has a conjugated diene content of less than 0.25 mole % and a halogen content of at least 0.6 wt. %; at least 20 mole % of the halogen being...
4681921 Process for preparing improved halogenated butyl rubber  
Improved halogenated butyl rubbers are prepared by isomerizing the polymers so that a significant mole fraction of the halogen is in the primary allylic position. The isomerization is carried out...
4486574 Polymers of methyl ethenyl benzene  
Polymers of methyl styrene produced from an isomer mixture having a high content of the para-isomer are halogenated, sulfonated or subjected to other substitution reactions.
4482678 Diene rubber composition and tire using it in tread  
A diene rubber composition comprising as a main rubber component an elastomeric polymer having a glass transition temperature of not less than -50° C. selected from the group consisting of a ...
4473451 Vapor phase chlorination of polyolefins  
An improved vapor phase process for chlorination of polyethylene in a fluidized bed is accomplished by chlorinating a mixture of powdered polyethylene and finely divided inorganic compounds having...
4420590 Bacteriocidal resins and disinfection of water therewith  
Novel strongly basic anion-exchange resins substantially loaded with controlled relative proportions of iodide-bromide polyhalides whereby, when water is passed therethrough which is contaminated...
4381374 Halogenation of butadiene polymers in mixed solvents  
Polybutadiene having high cis-1,4-configuration and dissolved in substantially anhydrous liquid organic solvent is reacted with chlorine, bromine or a mixture thereof. The solvent consists...
4360455 Preparation of mixtures of brominated polystyrenes and brominated aromatic compounds  
A mixture of brominated oligomeric polystyrenes, having a degree of polymerization of from 3 to 400, and low molecular weight brominated aromatic compounds of the diphenyl ether type is obtained by...
Matches 1 - 50 out of 118 1 2 3 >