Chemistry Reference
In-Depth Information
14.1.1.9 Methacrylate Polymers
Polymethacrylates
Structure
R
1
R
3
R
1
R
3
C
CH
2
C
CH
2
C
CH
2
C
CH
2
C
O
C
O
C
O
C
O
O
O
O
O
R
2
R
4
R
2
R
4
n
R
1
HorCH
3
;R
2
H, CH
3
,C
2
H
5
,orCH
2
CH
2
N(CH
3
); R
3
CH
3
;R
4
=
=
=
=
CH
3
,C
4
H
9
,
Cl
,C
2
H
5
R
1
,R
2
, and R
4
depend on the grade
CH
2
CH
2
N(CH
3
)
+
Synonyms
EUDRAGIT, Kollicoat, methacrylic acid
copolymer, ethyl acrylate, and methyl
methacrylate copolymer
Molecular weight range
(g/mol)
30,000-278,000
Solubility parameter,
δ
(MPa
0.5
)
19.3 (E100)
23.4 (L100-55)
23.5 (L100)
18.9 (RS)
T
g
range (
C)
48 to
>
150
°
Water uptake (% water at
75% RH)
0.3
-
2% (for PMMA)
Solvent solubility
E100, RL, and RS are soluble in acetone,
alcohols, dichloromethane, and ethyl acetate
pH range where soluble
<
5.0 (E100)
>
5.5 (L100-55)
>
6.0 (L100)
7.0 (S100)
Insoluble (RL)
Insoluble (RS)
Amenable methods of
dispersion manufacture
Melt extrusion, spray drying
Use in marketed
dispersion products
None
(
continued
)
