Plastic dispersion

It is usually only possible to store the original chromatogram if TLC foils are employed or if the adsorbent layer is fixed and removed from the plate as a whole. This can be achieved by treating the chromatogram with collodium [19], adhesive [20] or plastic dispersions and exercising a little patience. 

Chromatograms can be made handleable and storable by treatment with plastic dispersions, based on polyacrylic ester, polyvinyl chloride or polyvinyl propionate, such as, for example, Neatan (Merck) [21 — 23]. In order to avoid clogging the spray head with plastic dispersion residue it is recommended that it be rinsed through immediately after use with tetrahydrofuran or that disposable jets be employed [24]. 

Fig. 3. A complete flow curve of plastic disperse system with a field of flow (with a very high viscosity tic) at stresses smaller than the yield stress...

The same situation, as stated in papers of G. V. Vinogradov s school in the 1950s, takes place during creep of plastic dispersion systems, i.e. low-molecular-weight liquids with netforming (active) fillers. 

In order to complete the discussion of methodical problems, we should mention two more methods of determining yield stress. Figure 6 shows that for plastic disperse systems with low-molecular dispersion medium, when a constant rate of deformation, Y = const., is given, the dependence x on time t passes through a maximum rm before a stationary value of shear stress ts is reached. We may assume that the value of the maximal shear stress xm is the maximum strength of the structure which must be destroyed so that the flow can occur. Here xm as well as ts do not depend or depend weakly on y, like Y. The difference between tm and xs takes into account the difference between maximum stress and yield stress. For filled polymer melts at low shear rates Tm Ts> i,e- fhese quantities can be identified with Y. 

Latex Also called emulsion. It is an aqueous dispersion of natural or synthetic elastomeric rubbers and plastics (dispersions of plastic particles in water). 

Z-blade mixers Shearing and kneading by the specially shaped blades Mixing heavy pastes, creams and doughs Bakery industry, mbber doughs, plastic dispersions... 

Emulsifier/plasticizer, dispersing agent, surface active agent, surfactant, wetting agent Emulsifying salt/melding salt, sequestrant... 

The molecular weight of the plastic dispersed phase must be above a critical molecular weight. To obtain high strength, more than one high Tg polymer segment per molecule must be in a dispersed phase. 

Linear polyurethane for paper coating can be mixed with plastic dispersions where the polyurethane forms the bulk of the coating. 

Marangoni, A.G., Rogers, M.A. 2003. Structural basis for the yield stress in plastic disperse systems. Appl. Phys. Lett. 82, 3239-3241. 

Van den Tempel, M. 1961. Mechanical properties of plastic disperse systems at very small deformations. J. Colloid Sci. 16, 284-296. 

A color technician tests 3-10 batch samples on each piece of equipment two to three times each. The AV now becomes appraisal reproducibility for each EV piece of plastics dispersion equipment. This technique is also useful for comparing supplier Certificate of analysis (COA) data against your own incoming quality control (QC) testing to determine reliability between the two sets of data. To accomplish this, you must request duplicate sets of color data for each lot over 3-10 consecutive lots. 

The PERAPRET types are aqueous, non-ionic or anionic plastics dispersions, which are used either alone or in combination with an N-methylol compound, dpending on the finishing effect required. 

PERAPRET SF is a non-ionic, acrylate-type plastics dispersion. 

The product is often used for thickening aqueous solutions or plastic dispersions. 

Additives serve a variety of functions in forming , which may be divided into four categories binders, plasticizers, dispersants (also referred to as deflocculants), and lubricants. 

The occurrence of dimethylsulfone in Rhine water samples can be attributed either to industrial sources or to municipial effluents due to its application as technical additive (plasticizer, dispersion agent) and solvent. 

It may be possible to diperse the pigment in a slowly evaporating solvent such as isophorone or Solvesso 150 by using a differential three-roll mill. This technique is similar to the plasticizer dispersion technique except the plasticizer is replaced by a solvent. 

Divers. [European Master Batch] Dispersions of fMgments in plasticizers dispersion of foaming agent in PVC soft foam. 

Durtan . [Van Den Bergh Foods] Sorbi-tan esters used in cosmetics, household prods., wata softening compds., pesticides, auto polishes fabric antistat and lubricant food emulsifier rust inhibitor additive antifog in plastics dispersant... 

Xylose . [HoechstCelanese/Colorants Surf. Hoechst AG] Cellulose derivs. bindw, tihdckeno, plasticizer, dispersant for coatings, mining, batteries, rubber industry, cosmetics, foodstuffs, pharmaceuticals, agric., pt, textile industry. 

---