Chemistry Reference
In-Depth Information
Table 2.6 Characteristics of epoxy binders based on DAK adducts
Properties
AA/DAKAE
MA/DAKAE
Dynamic viscosity (mPa-s)
890
975
Colour
Pale yellow
Yellow
Mn (g/mol)
1095
1160
Density (g/cm
3
)
1.09
1.12
EEW
288
247
Epoxy content
0.347
0.337
Epoxy functiona
lity
3.8
3.91
Acid number (mg KOH/g)
-
78.2
α
- Glycol values
0.15
0.21
Elemental Analysis (%)
(Calc.)
71.96
68,72
C %
(Found)
71.85
68.47
(Calc.)
9.22
8.38
H %
(Found)
9.29
8.56
(Calc.)
2.58
2.39
N %
(Found)
2.65
2.18
(Calc.)
16.22
20.51
O %
(Found)
16.20
20.79
2.5 Preparation of Epoxy Curing Agents Based on Rosin
The cured epoxy resin is one of the most common of thermosetting materials. The
network structures of thermoset epoxy resins are based on the structure of both
epoxy binders and types of curing agents (hardeners). Most of the common curing
agents are based on tertiary amines, polyamines, polyamides or anhydrides
[60]. The
amine-epoxide reaction is particularly used in the cure of epoxy resins. The reaction
with dicarboxylic anhydride, as well as occurring in the manufacture of alkyds, is
