Chemistry Reference
In-Depth Information
(a)
H
2
CO
C
R
1
H
2
CO
C
R
1
H
2
CO
C
R
1
H
2
CO
C
R
1
O
O
HC
O
C
R
2
R'
OH
HC
OH
HC
OH
HC
O
C
R
2
R' = glycerol
H
2
C
O
C
R
3
H
2
C
O
C
R
3
H
2
C
OH
H
2
C
OH
O
O
Triglyceride oil
Mixture of mono and diglyceride
O
O
(b)
H
2
C
H
C
H
2
CO
C
R
1
(R
2
,R
3
)
OCN
R'
NH
C
O
CH
2
O
NH
R'
NCO
CH
2
O
DBTDL
50-70 °C
2OCN-R'-NCO
(TPDI or TDI)
HC
OH
O
C
H
2
C
OH
(Monoglyceride)
CH
2
C
R
H
2
C
H
2
C
HO
O
C
CH
3
O
50-70 !æ
O
O
O
O
CH
2
C
H
2
C
H
2
C
H
2
C
H
2
C
H
2
C
C O
CH
2
O
C
R
H
3
C
C
C
HN
R'
NH
O
O
C
C
O
CH
2
NH
R'
NH
C
O
O
C
CH
3
CH
2
O
Structure of urethane-acrylate oligomer
O
Figure 1.10 Preparation of a urethane-acrylate oligomer.
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