| R
& D |
|
|
ÇÁ·ÎÁ§Æ®
|
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ÄÁ¼³ÆÃ
¾÷¹«
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¼ººÐºÐ¼®
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À̼ҽþƳ×ÀÌÆ®ÀÇ
ÀÚü ¹ÝÀÀ (Self-addition reactions)
 dimerization
(uretidinedione)
trimerization (isocyanurate)
À̼ҽþƳ×ÀÌÆ®´Â º¸°üÁß ¶Ç´Â Ã˸ŠÁ¸ÀçÇÏ¿¡¼
2°³ ÀÌ»óÀÌ ¼·Î °áÇյDZ⵵ ÇÑ´Ù.
|
Isocyanate¿Í hydrogen compound°úÀÇ
NCOÀÇ
¹ÝÀÀ¼º
|
Active
hydrogen compound |
Typical
Structure |
Relative
reaction rate* |
|
Primary aliphatic amine |
R-NH2 |
100,000 |
| Secondary
|
RR'NH |
20,000-50,000 |
| Primary aromatic
amine |
Ar-NH2 |
200
- 300 |
| Primary hydroxyl
|
RCH2-OH |
100 |
| Water |
HOH |
100 |
| Carboxilic acid
|
RCOOH |
40 |
| Secondary
hydroxyl |
RR'CHOH |
30 |
| Ureas |
R-NH-CO-NH-R |
15 |
| Tertiary
hydroxyl |
RR'R"C-OH |
0.5 |
| Urethane |
R-NH-CO-O-R |
0.3 |
| Amide |
RCO-NH2 |
0.1 | * uncatalyzed at 25oC
|
TDI ÇÕ¼º¹ý
MDI ÇÕ¼º¹ý

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