SBR polymerization

Chemistry of SBR. There are three steps in the manufacturing of SBR polymerization, monomer recovery and finishing. The polymerization step determines the basic characteristics of SBR, whereas the product form (latex or dry rubber, oil extended or not) depends on the finishing step. 

Although the early literature described the application of a tubular reactor for the production of SBR latexes(1), the standard continuous emulsion polymerization processes for SBR polymerization still consist of continuous stirred tank reactors(CSTR s) and all of the recipe ingredients are normally fed into the first reactor and a latex is removed from the last one, as shown in Figure 1. However, it is doubtful whether this conventional reactor combination and operation method is the most efficient in continuous emulsion polymerization. As is well known, the kinetic behavior of continuous emulsion polymerization differs very much according to the kind of monomers. In this paper, therefore, the discussion about the present subject will be advanced using the... 

The polymerization process parallels the emulsion process used for styrene-butadiene rubber. Either a hot or a cold process can be used, with the cold polymerization providing the same improved processing and vulcanizate properties as seen in SBR. Polymerizations are carried to 70-80 percent conversion and terminated to avoid gel formation. The latex must be stripped to remove unreacted butadiene and acrylonitrile. 

Uses Surfactant for vinyl and vinylidene chloride, acrylic, styrene-acrylic, SBR polymerization, emulsion polymerization in paints/coatings food pkg. adhesives emulsifier in mfg. of food-contact articles Regulat EDA 21CER 175.105,178.3400 Properties Pale yel. clear liq. anionic 40% act. 

Nonoxynol-40 Nonoxynol-50 Suifynol surfactant, SBR polymerization paiis/... 

Hydrogenated taiiow acid Nonoxynol-6 phosphate Sodium rosinate emuisifier, SBR iatex Sodium p-styrenesulfonate emulsifier, SBR polymerization Potassium rosinate emulsifier, scouring agents Ceteareth-5 Ceteareth-15 Steareth-30 emulsifier, scrub soaps Sodium nonoxynol-4 sulfate emulsifier, sealants Sodium myristyl sulfate emulsifier, sec. oil recovery Tallowdimonium propyltrimonium dichloride emulsifier, secondary asphalt emulsions Palm glycerides... 

Hot, nonpigmented emulsion SBR polymerized above 38°C 1500 Cold, nonpigmented emulsion SBR polymerized below 10°C 1600 Cold, nonpigmented emulsion SBR carbon black/oil master batch/14 phr oil max... 

The addition reaction of organolithium compounds easily proceeds especially to intramolecular carbon-carbon double bonds (3.17) or to conjugated double bonds. The latter addition reactions proceed continuously. These reactions are utilized in butadiene and SBR polymerization and the organolithium compound is mostly used... 

Uses Printing ink binder as resin or salt, paper sizing agent, emulsifier for SBR polymerization as soap, tackifer resin in adhesives, imidazoline modifier in corrosion inhibitors, elastomer modifier in emulsion polymerization, dust control additive film-former/plasticizer in lacquers and varnishes Properties Gardners color sp.gr. 1.01 soften, pt. (R B) 75 C acid no. 171 flash pt, (OC) 226 C Sylvaros DR-22 [Arizona]... 

Uses Emulsifier, detergent, wetting agent used to prepare emulsifiers for SBR polymerization as shortstop for solv. polymerizations of rubber as plastidzer/soft-ener/tackifier for HR, SBR, CR food-pkg. adhesives, coalings, paper/paperboard, cellophane, rubber articles defoamer in food-contact paper/paperboard wood preservative... 

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