Polyacrylates emulsion polymerization

Uses Surfactant emulsifier for polyacrylate emulsion polymerization systems Properties Liq. water-sol. 30% solid Ablusol DBC70 [Taiwan Surf ]... 

The soapless seeded emulsion copolymerization method was used for producing uniform microspheres prepared by the copolymerization of styrene with polar, functional monomers [115-117]. In this series, polysty-rene-polymethacrylic acid (PS/PMAAc), poly sty rene-polymethylmethacrylate-polymethacrylic acid (PS/ PMMA/PMAAc), polystyrene-polyhydroxyethylmeth-acrylate (PS/PHEMA), and polystyrene-polyacrylic acid (PS/PAAc) uniform copolymer microspheres were synthesized by applying a multistage soapless emulsion polymerization process. The composition and the average size of the uniform copolymer latices prepared by multistage soapless emulsion copolymerization are given in Table 11. 

For the characterization of Langmuir films, Fulda and coworkers [75-77] used anionic and cationic core-shell particles prepared by emulsifier-free emulsion polymerization. These particles have several advantages over those used in early publications First, the particles do not contain any stabihzer or emulsifier, which is eventually desorbed upon spreading and disturbs the formation of a particle monolayer at the air-water interface. Second, the preparation is a one-step process leading directly to monodisperse particles 0.2-0.5 jim in diameter. Third, the nature of the shell can be easily varied by using different hydrophilic comonomers. In Table 1, the particles and their characteristic properties are hsted. Most of the studies were carried out using anionic particles with polystyrene as core material and polyacrylic acid in the shell. 

ALCOGUM 296-W is recommended primarily as a stabilizer, protective colloid, and thickener for water based systems, such as natural and synthetic rubber latices, and polymeric dispersions, such as polyvinyl acetate and polyacrylate emulsions. It possesses unique adhesive, suspending, emulsifying, and film-forming characteristics, making it ideal for any other industrial uses. 

Liu et al. also studied LIPN systems for damping control in coating applications [Liu et al, 1995]. A polystyrene (PS)/polyacrylate (PAcr) latex IPN was synthesized in a two-stage emulsion polymerization. Crosslinked PS was synthesized first as the seed polymer by a semi-continuous process,... 

Polyacrylates are produced commercially by free-radical-initiated solution and emulsion polymerization of the appropriate monomer. Unlike for methacrylates, suspension and casting procedures are not feasible because of the rubber and adhesive nature of higher acrylates. 

Alkane sulfonates are applied in a widespread manner in emulsion polymerization. They are used as processing aids, in particular in the emulsion polymerization of vinyl chloride, vinyl acetate, styrene and acrylonitrile. Because they possess no double bonds, alkane sulfonates do not act as radical chain stoppers. Well-known lattices derived from emulsion polymerization are poly(vinyl chloride), ethylene-vinylacetate copolymers, polyacrylates, and butadiene and chloroprene rubbers. Alkane sulfonates also offer good stabilizing effects in lattices against coagulation by fillers. 

Hao et al. [64] prepared fluorinated polyacrylate emulsion (CFBDH) and solution (SFBDH) by polymerization of dodecafluoroheptyl methacrylate (DFMA) with BA, dimethylaminoethyl methacrylate (DM), and 2-hydroxypropyl acrylate (HpA) via seeded emulsion polymerization and solution polymerization, respectively. Scheme 6.14 shows the structure of CFBDH. 

Emulsion polymerization Polyacrylates Functional coatings and water-resistant adhesives 72-74... 

The polyacrylic elastomers were prepared by emulsion polymerization. The monomers, water, emulsifiers (i.e., sodium lauryl sulfate and sodium salt of polymerized naphthalene sulfonic acid), tetrasodium ethylenediaminetetraacetate, and sodium ferric salt of ethylenediaminetetraacetic acid were charged to the reactor vessel equipped with an agitator. The temperature of the reactor vessel was controlled at 10 C. The reactor was evacuated to remove air, closed and the emulsion agitated. Sodium sulfate, sodium formaldehyde sulfoxylate and paramenthane hydroperoxide were then charged to the reactor. The reaction time was 12 hours. The conversions to copolymers were 93 - 97% (Table 1). 

Z. Ai, G. Sun, Q. Zhou, C. Xie, Polyacrylate-core/Ti02-shell nanocomposite particles prepared by in situ emulsion polymerization. J. App. Polym. Sci. 102,1466-1470 (2006)... 

Figure 10.3 Submicronic magnetic latex obtained by emulsion polymerization of styrene and divinylben-zene onto a ferrofluid emulsion stabilized by polyacrylic acid based amphiphilic surfactant and initiated by potassium persulate (Montagne, 2002).

Uses Emulsifier for emulsion polymerization particularly suitable for the manufacture of highly filled emulsion of polyvinyl acetate and polyacrylate Regulatory Australia AlCS, Canada DSL, Europe EINECS, Japan ENCS/MITI, Korea ECL, China lECSC, Philippines PICCS listed Properties CL, si. viscous liq. vise. 400-1000 mPa-s pH 7.0-8.5 Use Level 2-6%... 

Uses Foaming agent for syn. latexes, emulsion polymerization aid. esp. in mfg. of polyacrylate emulsion detergent base for household/industrial detergents Properties Liq. to paste pH 7-8.5 (10%) 32% cone. 

Uses Emulsifier for emulsion polymerization of polyacrylates detergent base in household/industrial detergents... 

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