Vinyl dispersion

As applied to vinyl dispersions, the heating of a dispersion, forming a homogeneous mixture. Fluxing temperature temperature at which fusion occurs in vinyl dispersions. 

Referring to vinyl dispersions, having affinity for the dispersing medium. 

Fusion temperature Fluxing temperature temperature at which fusion occurs in vinyl dispersions. 

The term plastisol is used to describe a vinyl dispersion that contains no volatile thin-ners or diluents. Plastisols often contain stabilizers, fillers, and pigments, along with the essential dispersion plastics and the liquid plasticizer. All ingredients exhibit very low volatility under processing and use conditions. Plastisols can be made into thick fused sections with no concern for solvent or water blistering, as with solution or latex systems, so they are described as being 100 percent solids. 

The vinyl dispersion industry provides many different products worldwide and uses different processes. When reviewing vinyl dispersions there are basically two types known as plastisol and organosols. These dispersions and examples of processes used will be reviewed. 

The ovens used for processing vinyl dispersions may be gas-fired, electric, or infrared. They are required to provide uniform heat and provide sufficient exhaust to vent the smoke produced by the hot plastisol through a suitable ventilating system exposing clean air into the atmosphere. 

INTEX PLASTISOL GREY 28 is a vinyl dispersion specifically formulated for high speed strand or fiber coating. 

Vinyl dispersions are fluid suspensions of special fine particle size polyvinyl chloride resins in plasticizing liquids. When the system is heated to about 350F., fusion (mutual solubilization of resin and plasticizer) takes place. The dispersion turns into a homogeneous hot melt. When the melt is cooled below 140F., it becomes a tough vinyl coating with excellent physical properties such as flexibility, abrasion resistance, chemical resistance and excellent aging. 

Use In calendering film, sheeting, vinyl dispersions, extrusions. 

Pliovic [Goodyear], TM for homopolymers, vinyl dispersion resin, plastisol, and organosol compounds. 

Utilizing A Torque Rheometer (Brabender Plasti-corder) At Constant Mixer Temperature, The Society of The Plastics Industry, Vinyl Dispersions Division, New York, 1968. 

Goi touch. [BFGoo ich/Spec. Polymers] Vinyl dispersion resin specialty polymer for high-performance vinyl or latex disposable gloves. 

PVC (small diameter) Core-shell acrylic (large diameter) Bimodal vinyl dispersion resins Yang U.S. Pat. 4,461,869, 1984 Goodrich... 

At the phenomenological level it may be known that Solvent A works well with acrylic dispersions while Solvent B is better for vinyl dispersions. Experimentally the important question of how much to add can be determined by systematic experimentation. However, for fine tuning some theoretical knowledge about the influence of transient solvent on the glass transition temperature (Tg), and tihe influence this will have on the minimum film forming temperature (MFT) is usefiil. This would undoubtedly lead to some consideration of the distribution (partitioning) of the solvent between the aqueous and polymer phases, which can be... 

Uses Solvent for coatings (NC emulsions, vinyls) dispersant intermediate high solvating power for vinyl resins, cellulose esters and ethers lube oil dewaxing fragrance in cosmetics Manuf/Distrib. Dow... 

Acetoacelnxy) ethyl acrylate, 2-(Acetoacetoxy) ethyl methacrylate viscosity reducer, varnishes Acrylate monomer, Photomer 4542 PPG-2 neopentyl glycol diacrylate viscosity reducer, vinyl dispersions Sutfynol 104... 

With vinyl dispersions, the processor can use convenient liquid handling techniques such as spraying, pouring, spread coating, and dipping. This system permits products to be made that otherwise would require costly and heavy melt processing equipment. 

For liquid systems, vinyl dispersions are prepared in both low intensity blender/mixers and high shear agitation systems. The choice depends upon the viscosity of the mix and the ability to control the temperature so that gelation is avoided. Ribbon blenders to high-speed kettle mixers are employed in mixing... 

Vinyl (dispersion type - Organosols ) Finish for office equipment Plasticiser Aromatic and aliphatic hydrocarbons Esentially a dispersion of PVC or a vinyl chloride copolymer in plasticiser/diluent. A high temperature is necessary to produce a continuous film. The solvent is required to reduce viscosity and assist dispersion. It must not swell the resin particles excessively or cause coagulation at room temp. 

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