详情
Eastman CAB-500-5 is a high butyryl cellulose ester with one of the lowest hydroxyl contents of all Eastman cellulose acetate butyrate esters.
As might be expected from the high butyryl content,CAB-500-5 offers a wide range of solubility and compatibility.It produces a relatively soft,flexible film requiring little or no plasticizer in many applications.Like other cellulose acetate butyrate types,CAB-500-5 exhibits desirable film properties such as low color,good resistance to weathering,and color stability under exposure to ultraviolet light.
CAB-500-5 is used as a filmformer and additive in applications including hot-melt strippable coatings and lacquers for paper,plastic,and leather.It is also useful in inks and as a flowcontrol additive in polyurethane and polyester coatings.Because of the low hydroxyl and high butyryl content,CAB-500-5 can be formulated into emulsion coatings for leather for improvement of "hand"or the natural feel of the leather.
CAB-500-5 is supplied as a dry,free-flowing powder.
Table 1 |
Typical Propertiesa |
Butyryl content,avg.wt% |
51.0 |
Acetyl content,avg.wt% |
4.0 |
Hydroxyl content,avg.wt% |
1.0 |
Viscosity,sb | 5.0 |
Viscosity,pb | 19.0 |
Color,ppmc | 125 |
Haze,ppmc | 25 |
Free acidity,as acetic acid,wt% |
0.03 |
Ash,% |
0.05 |
Refractive index |
1.475 |
Heat test(160oC for 8 h) |
Tan melt |
Melting range |
165-175(329-347) |
Specific gravity |
1.18 |
Weight/volume(cast film) |
|
Kg/L |
1.18 |
lb/gal(U.S.) |
9.83 |
Bulk density,as poured |
|
kg/m3 | 400 |
lb/ft3 | 25 |
Bulk density,tapped |
|
kg/m3 | 512 |
lb/ft3 | 32 |
Dielectric strength |
|
kV/mil |
2.0-2.5 |
kV/cm |
787-984 |
Glass transition temperature,oC(oF) |
96(205) |
Molecular weight,Mnd | 57,000 |
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