K-FLEX® 500 is a blend of dipropylene glycol dibenzoate and diethylene glycol dibenzoate in a ratio of about one to one by weight. K-FLEX® 500 was created to take advantage of the excellent performance of diethylene glycol dibenzoate but with the added advantage of the better handling characteristics imparted by dipropylene glycol dibenzoate. Like K-FLEX® DP, K-FLEX® 500 is a polar plasticizer that is a high solvator for PVC applications. K-FLEX 500 is also compatible with polar polymers such as polyvinyl acetate.
| Attribute | Value |
|---|---|
| Specifications | |
| Acidity% (as benzoic acid, maximum %) | 0.1 |
| Assay% (As benzoate ester, Minimum,% ) | 98.0 |
| Color Maximum (APHA) | 100 |
| Typical Properties | |
| Boiling Point (5 mm Hg,°C) | 191 |
| Color (APHA) | 50 |
| Density, ASTM D1475, 25°C g/ml | 1.15 |
| Density, ASTM D1475 ,25°C lbs/gal | 9.6 |
| Flash Point, ASTM D92, °C | 210 |
| Freeze Point, °C | 6 |
| Glass Point, by DSC, °C | -54 |
| Moisture Content, % | 0.02 |
| Refractive Index, 25°C | 1.5306 |
| Solubility, in water, % | 0.07 |
| Solubility Parameter, Small’s Hildebrands | 9.7 |
| Specific Gravity, 25/25°C | 1.14 |
| Surface Tension, ASTM D1331, 25°C, dynes/cm | 44.4 |
| Vapor Pressure, 25°C (extrapolated), mmHg | 2.58×10-5 |
| Viscocity, Brookfield RVT, 20 RPMs at 25°C, cps and mPa.S | 80 |
| Viscosity, Kinematic, 25deg;C, cSt | 70 |
| VOC, ASTM D2369, % | 2.9 |
| FDA Coverages | |
| 21 CFR 175.105 | Yes |
| 21 CFR 176.170 | Yes |
| 22 CFR 176.180 | Yes |
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