Chemistry Reference
In-Depth Information
Cellulose Acetate Butyrate
Structure
RO
R = H or
O
R
O
O
RO
OR
⋆
CH
3
or
O
O
O
OR
OR
⋆
CH
3
RO
OR
n
Synonyms
CAB, cellaburate
Molecular weight range (g/mol)
30,000
(MPa
0.5
)
Solubility parameter,
δ
28.7
T
g
range (
C)
130
°
T
m
range (
°
C)
155-165
Water uptake (% water at 100% RH)
1-2%
Solvent solubility
Alcohol/aromatic hydrocarbon mixtures
pH range where soluble
Negligible
Amenable methods of dispersion manufacture
Melt extrusion, spray drying
Use in marketed dispersion products
None
Cellulose Acetate Phthalate
Structure
RO
O
O
O
OH
RO
OR
O
OH
,Ris
or
O
O
OR
CH
3
OR
O
H
OR
n/
2
Synonyms
CAP, cellacefate, cellulosi acetas phthalas,
Aquacoat cPD
Molecular weight range (g/mol)
48,000
(MPa
0.5
)
Solubility parameter,
δ
27
T
g
range (
C)
160
-
170
°
T
m
range (
C)
192
°
Water uptake (% water at 75% RH)
7
-
8%
Solvent solubility
Freely soluble in acetone, soluble in diethylene
glycol, and practically insoluble in ethanol and
methylene chloride
