Matches 301 - 350 out of 477 < 1 2 3 4 5 6 7 8 9 10 >
Match Document Document Title
4112211 Process for the manufacture of homo- and copolymers of tetrafluoroethylene employing as the reducing agent in the redox catalyst an ayodicarboxylic acid, salt of ayocarboxylic acid, azodicarbonamide, or mixtures thereof  
Polymers on the basis of tetrafluoroethylene are produced in the presence of a redox system as catalyst consisting of a usual peroxidic compound as oxidizing component and a water-soluble nitrogen...
4104457 Bulk polymerization of vinyl chloride to control grain size  
Polymers and copolymers of vinyl chloride having a narrow grain size distribution and a large average mean diameter and a process for the preparation of same in which the polymerization of vinyl...
4098980 Non-aqueous dispersion polymerization of conjugated diolefins  
A process for the non-aqueous dispersion polymerization of a conjugated diolefin monomer, for instance, butadiene or isoprene, in a liquid hydrocarbon dispersion medium, for instance, n-butane or...
4098987 Non-ionic surfactants from water soluble copolymers of acrylamide with hydrophobic monomers  
Polymeric surfactants are copolymers of acrylamide with 30 - 60 wt. percent of acrylic esters or alkyl or alkoxymethyl acrylamides having molecular wt. from 800 to 10,000 amu.
4092470 Stable, pumpable, aqueous suspensions of organic peroxides  
Stable, pumpable, highly concentrated aqueous suspensions of organic peroxides containing (a) nonionic emulsifiers having a maximum HLB value of 12.5 and (b) nonionic emulsifiers having a minimum...
4090994 Process for preparing a polyvinylchloride composition by polymerization in the presence of molding additives  
A process for preparing a polyvinylchloride composition by polymerizing vinyl chloride or vinyl chloride and a comonomer comprises polymerizing vinyl chloride or a mixture of vinyl chloride and a...
4091054 Process of preparing styrenic polymer particles  
In a suspension polymerization process of preparing styrenic polymer particles from a styrenic monomer and small particles of a styrenic polymer in a definite particle size range, styrenic polymer...
4089815 Photopolymerization initiators  
Ethylenically unsaturated monomers in the presence of a novel aromatic oligomeric compound or polymer having a polyhaloacetyl moiety attached thereto are polymerized upon exposure to a source of...
4079101 Diolefin polymerization process in the presence of seed polymers  
A polymerization process is described in which conjugated diolefin polymers are prepared by free-radical polymerization at improved rates by conducting the polymerization in a batch charge of all...
4060680 Production of acrylonitrile copolymers  
A process which comprises producing a uniform copolymer of acrylonitrile and at least one faster-reacting aromatic olefine containing 50-95% molar of acrylonitrile units wherein the polymerization...
4048147 Carboxylic acid of cyclopentadiene derivative, salt thereof, or ester thereof and process for producing these compositions  
A novel compound represented by the formula, ##STR1## WHEREIN R is a hydrogen or an alkyl group having 1 to 3 carbon atoms, said four R's being the same or different; R 1 is hydrogen, an alkali...
4036794 Manufacture of expandable styrene polymers  
A process for the manufacture of expandable styrene polymers by suspension polymerization of the monomers in the presence of blowing agents and suspension stabilizers, the latter having been...
4036909 Process for the polymerization and copolymerization of vinyl and diene compounds  
Monomeric conjugated or unconjugated organic compounds are polymerized in an initiator systems consisting of an organic peroxide and a macromolecular compound consisting of a polymer or copolymer...
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...
4026962 Dispersion-polymerization process using block copolymers  
There is disclosed a process of dispersion-polymerizing vinyl monomers promoted by free-radical catalysts. This process comprises dispersing under stirring in water a block copolymer of the A-B...
4011388 Process for preparing emulsions by polymerization of aqueous monomer-polymer dispersions  
Process for the preparation of aqueous homogeneous polymer emulsion which comprises mixing, generally with agitation or under shear conditions, water, surfactant, at least one polymer, e.g.,...
3975339 Manufacture of polymers of net-shaped structure  
A process for the manufacture of polymers of net-shaped crosslinked structure and with uniform length of the crosslinks. In this process, polyfunctional organoalkali metal compounds which have been...
3975341 Water in oil emulsion process for preparing gel-free polyelectrolyte particles  
There is provided a process for preparing polyelectrolytes by a water-in-oil emulsion process. A water-in-oil azeotropic emulsion is heated with agitation and a concentrated aqueous solution of...
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...
3959235 Method of polymerizing vinyl chloride  
Vinyl chloride monomer, or a monomeric mixture comprising vinyl chloride as a main component and other monomers co-polymerizable therewith in an aqueous reaction medium, is polymerized in a...
3954909 Method of producing solid polymers  
A method for producing solid polymers having a molecular weight greater than 50,000 from olefins wherein the olefin is polymerized in the absence of a liquid dispersion agent of a nature different...
3951600 Acrylamide aqueous solution handling method  
There is disclosed a method for handling acrylamide aqueous solutions with safety wherein acrylamide aqueous solutions obtained through catalytic hydration reaction of acrylonitrile are handled...
3941729 Styrene suspension polymerization system for spheres  
An aqueous suspending agent solution or vehicle useful for suspension polymerization of a styrene-monomer such as styrene as well as derivatives of it and also mixtures with it to produce...
3926934 Polyethylene powders  
Polyethylene powders containing adsorbed water are prepared by the high-pressure polymerization of ethylene employing a water-soluble initiator, a controlled concentration of water, a dispersing...
3907730 Resinous initiator suspension for olefinic polymerization reactions  
A free-radical initiator suspension for use in olefinic polymerization reactions comprising a suspension of said initiator in a water-swellable lightly cross-linked polymer of one or more...
3887528 Precipitation polymerization of 1:1 copolymerizates of maleic acid anhydride and allyl acetate  
This invention relates to a method of precipitation polymerization of 1:1 copolymerizates of maleic acid anhydride and allyl acetate consisting of polymerizing a solution of a monomer mixture of...
3882195 Pre-emulsification-delayed initiation suspension pearl polymerization process  
A process for preparing vinyl chloride based polymers by suspension polymerization provides granular products characterized by improved uniformity of particle size, high porosity and rapid fushion...
3880771 AQUEOUS SUSPENSION VEHICLE USEFUL IN SUSPENSION POLYMERIZATION SYSTEM FOR SPHERES  
There is disclosed an aqueous suspension vehicle consisting essentially of water having dissolved therein a water-soluble suspending agent, such as one or more hydroxyethylcelluloses, in a...
3879328 CURABLE COMPOSITIONS OF POLYMERS CONTAINING LABILE HYDROXYL GROUPS  
Compositions of synthetic polymers containing labile hydroxyl groups such as vinylbenzyl alcohol polymers are efficiently cured by incorporating therein an acid catalyst such as hydrochloric acid...
3870691 METHOD FOR POLYMERIZING TETRAFLUOROETHYLENE AND THE POLYMERS OBTAINED THEREFROM  
This invention relates to a method for polymerizing tetrafluoroethylene in suspension comprising initiating polymerization with a previously prepared tetrafluoroethylene polymer, in the absence of...
3863014 High acrylonitrile terpolymer containers and packages  
Disclosed herein are oriented containers for food, beverages, and medicines wherein the container is the interpolymerization product of A. 65 to 78% by weight of acrylonitrile; B. from 3 to 10% by...
3862915 Process for aqueous polymerization of N-vinylpyrrolidone utilizing finely divided suspension of water insoluble catalyst  
Solutions of N-vinylpyrrolidone polymers can be prepared with particular advantage by polymerization of N-vinylpyrrolidone in an aqueous medium by adding the polymerization catalyst in portions or...
3857824 PROCESS FOR THE PREPARATION OF BEAD POLYMERS USEFUL IN GEL PERMEATION CHROMATOGRAPHY  
The present invention relates to an improved process for preparing in bead form polymers useful in the gel permeation chromatography of water soluble polymers, e.g. polyethylenimines. The process...
3843616 VINYL CHLORIDE-ETHYLENE COPOLYMERS AND THE PREPARATION THEREOF  
A method for producing porous vinyl chloride-ethylene copolymers containing at least 98.1 per cent by weight of vinyl chloride and 0.3 to 1.9 per cent by weight of ethylene which comprises...
3839310 N-VINYL LACTAM-C10-22 VINYL ETHER COPOLYMER AS PROTECTIVE COLLOIDS IN VINYL CHLORIDE SUSPENSION POLYMERIZATION  
A copolymer of an N-vinyl lactam and a C 10 -22 vinyl ether is disclosed as a protective colloid in the suspension polymerization of vinyl chloride. There is also disclosed a method of making...
3742091 VINYL MONOMER POLYMERIZATION PROCESS  
Agglomeration of vinyl polymers produced by liquid phase polymerization reactions is substantially inhibited when the polymerization is effected in the presence of certain polymeric additives which...
3723395 BATCH-CONTINUOUS REACTION PROCESS IN A FLUIDIZED BED  
Material increases in throughput and output of batch-type reactors are obtained by avoiding operational time-losses in dumping and filling and start-up. The improvements are achieved by a flexible...
3723571 DISPERSION POLYMERIZATION OF VINYLIDENE CHLORIDE COPOLYMER  
A process for preparing a copolymer of vinylidene chloride is provided wherein the copolymer is of between 70 percent and 85 percent by weight of vinylidene chloride and is of spherical particle...
3721657 HYDROPHILIC GEL POLYMERS OF VINYLPYRROLIDINE AND HYDROXYALKYL METHACRYLATE  
A plastic or resin product obtained by mixing a comminuted pyrrolidone such as polyvinylpyrrolidone, and optionally modifiers and additives such as organic methacrylates, and optionally...
3714097 PROCESS FOR PRODUCING LOW FOAMING LATEXES OF INTERPOLYMERS CONTAINING VINYL CHLORIDE AND ETHYLENE  
This invention relates to stable vinyl chloride/ethylene interpolymer latexes polymerized at between about 50 and 15,000 psi., which latexes can be removed from said reactors without the usual...
3697493 PREPARATION OF POLYVINYLCHLORIDE  
Process for preparing an improved polyvinyl chloride comprising polymerizing vinyl chloride in the presence of a peroxide and/or azo compound as catalyst, a protective colloid and in the additional...
3678021 PROCESS FOR PREPARING VINYL BASED POLYMERS AND COPOLYMERS INSOLUBLE IN THEIR MONOMERS  
Process for preparing vinyl based polymers and copolymers which are insoluble in their monomeric compositions comprising dispersing a small amount of a suspension of an aqueous solution of at least...
3676413 PROCESS FOR THE POLYMERIZATION AND COPOLYMERIZATION OF VINYL MONOMERS AND THE RESIN COMPOSITIONS OBTAINED THEREBY  
Vinyl monomers are polymerized and copolymerized in mass or in the gaseous phase in the presence of a water-soluble polymerization catalyst which is mixed with an inert support material and water...
3624036 INVERT EMULSION POLYMERIZATION OF ACROLEIN UTILIZING COMMERCIAL MONOMER  
The present invention is directed towards an invert emulsion process for the polymerization of an α,β ethylenically unsaturated aldehyde, and in particular is directed to the homopolymerization...
3548034 POLYMERIZATION OF VINYL CHLORIDE IN THE PRESENCE OF AN ACRYLIC ESTER POLYMER  
3548035 SUSPENSION POLYMERIZATION PROCESS  
3539661 PROCESS FOR PRODUCING SELF-CURING POLYMERS  
3536676 POLYMERS OF ALKYLENE DIPEROXYESTERS  
3535301 PROCESS FOR OBTAINING POWDERS OF POLYTETRAFLUOROETHYLENE  
3530080 STABLE VINYL ACETATE COPOLYMER EMULSION,ITS PREPARATION AND COATING COLORS PREPARED THEREFROM  
Matches 301 - 350 out of 477 < 1 2 3 4 5 6 7 8 9 10 >