BLUSH RESISTANCE

Uses. Diacetone alcohol is a widely used solvent in the coatings industry where it finds appHcation in hot lacquers which require high boiling components, and in bmshing lacquers where its mild odor, blush resistance, and flow-out properties are desired. Diacetone alcohol is also a solvent for nitrocellulose, cellulose acetate, and epoxy resins. 

Properties Extmsion, sheet Injection mol ding Injection mol ding, thin parts Extmsion, sheet Injection mol ding Blush resistance... 

Table 4. Blush Resistance and Dilution Ratio of Common Industrial Solvents ...

Solvent name Blush resistance at 27°C, % T oluene Ahphatic naphtha... 

Features Good disp. In both organosol and plastisol formulations low residual emulsifier level provides good clarity, moisture blush resist. fine grind and stable vise, chars, for thin film applies. 

Features Low residual emulsifier level provides good moisture blush resist, and clarity high m.w. provides good fused film props. good disp. for easier plastisol formulation... 

Features Offers low vise., good color retention, exc. flow and blush resist. light-stable... 

Chem. Descrip. Modified cycloaliphatic amine epoxy Uses Epoxy curing agent for high solids coatings accelerator for polyamide and amidoamine curing agents Features Good chem. resist, and low temp, cure (30-35 E) exc. blush resist. 

Blush resistance tests were canted out by spraying a soiution ol 92% DOWANOL giycol ether and B% nitrocellulose on a 6 x 24 glass plale lam a distance ol eight inches, 30-40 pounds air pressure was used and 30 minutes drying lime ailowed. 

This ketone is a colorless, stable liquid, miscible with mast lacquer solvents ond only very slightly soluble in water. It is used os a high-boiling solvent for nitrocellulose and is particularly applicable in vinyl resin finishes, where its slow rate of evaporation prevents quick drying, improves the flaw and gives blush resistance also used with some effect in insecticidal preparations. 

Isopropyl ocetote is a wofer-whife pleosont-odored liquid with properties intermediote between ethyl and butyl acetates. It is miscible with most of the common organic solvents such os alcohols, ketones, esters, oils, hydrocarbons, etc., and it is a solvent for nitrocellulose, cellulose ocetate (of low viscosity) and a wide ronge of oils, fats, waxes, gums ond notural and synthetic resins. Like n-propyl ocetote, its solvent power for cellulose esters is increosed when lower aliphatic alcohols are added. It is largely used in the lacquer industry where its slow evaporation rate and blush resistance ore of importance. It is also used in the monufacture of plastics, artificial leather, dopes, films, cements, and in the recovery of acetic ocid from aqueous solutions. 

Methyl amyl acetate is a colorless liquid with o mild and pleasant odor. This medium boiling solvent is used in nitrocellulose lacquer fabrication producing such advantages as blush resistance, reduction of "orange peel" in the lacquer film, and no swelling of oilbase undercoats. 

Isabutyl isobutyrate is a slow evaporating solvent with blush resistance, good flow and leveling which are favorable properties in formulating cellulose nitrate. Its solvent activity is equivalent ta methyl amyl acetote and is therefore used as a direct substitute in many formulations. 

Meth/I lactate is a water-white liquid, completely miscible with water and most organic liquids. It is a solvent for nitrocellulose, cellulose acetate, cellulose ocetobutyrate ond cellulose acetoprapionate. It is used in the manufacture of locquers and dopes where it contributes high tolerance for diluents, good flaw and blush resistance. 

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