Acrylic binders, particle size

Acrylic binders, particle size distributions, 269f... 

Figure 4. Particle size distribution of two different commercially available acrylic binders mean diameter = 121 nm (A), 127 nm (B).

A method for coating microchannel walls with layers as thick as 25 pm was developed by Stefanescu et al. [181]. The microreactor was built from FeCrAl (Aluchrom ). The metal surface was first chemically treated in several steps and afterward annealed at 1200 °C for 1 h to trigger the segregation of aluminum and the formation of an alumina layer on the metallic surface. An alumina washcoat was subsequently deposited from a slurry onto the microstructure and characterized by various physical methods. The authors varied the properties such as viscosity, particle size, and pH of the slurry. Acrylic acid, a component used as dispersant and binder, was found to be particularly important for the adhesion of the alumina layer. 

Uses Acrylic for water-based printing inks, in the mfg. of high gloss and other types of emulsion paint binder for nonwoven fabrics Features Aq. emulsion of alkali-sol. acrylic copolymer Properties Emulsion 0.2 p particle size sp.gr. 1.07 vise. 0.05-0.5 poise pH 3.5-5.5 anionic 41 1% solids Texicryl 13-031 [Scott Bader]... 

The choice of binder which permits the formulation of a solventless and odourless paint is discussed, with respect to performance requirements. These requirements can be achieved by reducing the minimum film forming temperature of the binder and neutralising with an odourless base. A description is given of comparative tests made on masonry paints based on acrylic emulsions having different minimum film forming temperatures and neutralisation. Differences and similarities between such acrylic emulsions are discussed. Typical commercialised products of similar particle size were used from the acrylic/styrenes and pure acrylics. The hard monomers of the binders used were methyl methacrylate or styrene, and the soft monomer in the binders was butyl acrylate. Experiments were made with mat masonry paints in the PVC range of 40-60%. 6 refs. 

Low Surface Area, Reducing Sintering Atmosphere The material selected for this formulation was a relatively coarse tungsten carbide powder. The binder system was a standard acrylic polymer. Since the WC was very coarse (16 pm average particle size) and had such a high density (15.7 g/cc), the formulation was difficult to prepare. The tape casting had to be done immediately after the slurry was poured from the preparation jar. 

Rgure 5.4 Green density of a 0.35- im median particle size alumina compact as a function of uniaxial die pressing pressure. At comparable pressing pressures, higher green densities are achieved with 2 vol % of 20 M PEG wax binder as compared with Rhoplex B60-A acrylic wax emulsion. Green density increases proportionally with the log of the applied pressure for both systems. 

An obvious means of increasing conductivity is to incorporate metals into the fabric. Thus fabric can be sprayed with a liquid resembling metallic paint, containing micron-sized metallic particles such as copper incorporated into a binder such as a polyester, epoxy or acrylic resin. During curing the metallic particles come into contact with one another, thus... 

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