Particle binders

The PVC is simply P /Vf and is determined by the volume of filler added to the formulation. The CPVC occurs when the binder particles are close packed and Vv = 0. At the CPVC, there is Just enough binder to coat all of the filler particles and the substrate with at least monomolecular layer of binder, and fill the interstices between particles. 

Simons, S.J.R. and Fairbrother, R.J., 2000. Direct observation of liquid binder-particle interactions the role of wetting behaviour in agglomerate growth. Powder Technology, 110, 44-58. 

Spray drying requires formulahon of a relatively stable, usually aqueous dispersion of zeolite and colloidal binder particles, which are then fed to the spray drier [88, 89], Organic dispersing agents may be added to the spray drier feed slurry to stabilize the dispersion while the slurry is fed to the drier. 

Acrylic emulsions tend to flow nicely leveling out rather than giving a three-dimensional effect sometimes offered in various oils. In the absence of a pigment, acrylic emulsions give a milky white appearance. As the water evaporates, the binder particles coalesce forming a tight film. When dried, the film is clear and becomes water insoluble. 

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

Coating vehicle usually identifies a combination of binder and volatile liquid. It may be a solution or a dispersion of fine binder particles in a nonsolvent formulation. No pigments are included if a clear, transparent coating is required. The composition of the volatile liquid provides enough viscosity for packaging and other application, but the liquid itself rarely becomes part of the finished coating. 

Binder A material with a high bonding ability can be used as a binder to increase the mechanical strength of the tablet. A binder is usually a ductile material prone to undergo plastic (irreversible) deformation. Typically, binders are polymeric materials, often with disordered solid-state structures. Of special importance is the deformability of the peripheral parts (asperities and protrusions) of the binder particles [5],... 

Waterborne paints are usually emulsions of polymer-based binder particles. They are made by making an emulsion of droplets of monomers in water, after which the monomers are polymerized to form solid particles. When applied, the water and possibly other solvents evaporate, and the binder particles fuse to form a solid layer. 

Schaefer, T. Mathiesen, C. Melt pelletization in a high shear mixer. IX. Effects of binder particle size. Int. J. Pharm. 1996, 139, 139-148. 

Kato H, Ono Y, Yonezawa Y, Sunada H. The effect of binder particle size on granule and tablet properties in high shear and extrusion granulation. J Drug Deliv Sci Tech 2006 l6(6) 461-6. 

Agglomeration of only one component of a mixture controlled by, for example, binding mechanism, binder, particle size see also Oil agglomeration). 

Attrition-resistant microspheroidal catalyst particles for fluidized beds are manufactured by means of spray drying. The catalyst particles, for instance zeolite crystals, are suspended in an aqueous sol or hydrogel of binder particles that, after processing, serve as a mechanically strong and porous matrix. Typical binders are silica-alumina and alumina gels, clays (e.g. kaolin, bentonite), and... 

Volatile substances. Volatile substances are chemicals that keep the paints fluid enough to be applied easily, and that subsequently evaporate during drying. In some cases, these volatile substances actually dissolve the binders and other chemicals so that the paint is nearly a uniform liquid. Modem paints actually contain tiny solid binder particles that are suspended in the volatile substances. These particles become a continuous coating as the volatile substances evaporate. 

The particle size and size distribution are perhaps the most important measurement to be made for a latex. The particle size and size distribution are designed for each latex so that it can meet its end-use requirements. For example, in paper coatings, binder particles in the size range of 100 to 300 nm interact with the paper... 

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