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Flexobond
Adhesives
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FLEXOBOND series of urethanes are usually used in
medical, electronics and aerospace industries.These are two
part urethanes containing no TDI, MOCA, lead or mercury, that
cure to a flexible tough material. They can be cured either at
ambient conditions or elevated temperatures.
- FLEXOBOND 202: Rubber modified, fast cure, good
adhesion to difficult bond substrates.
- FLEXOBOND 329: Black thixotropic soft adhesive
with high bond strength.
- FLEXOBOND 430: A clear, soft urethane with a long
work life.
- FLEXOBOND 431: A clear material with low
outgassing, used heavily in the medical industry.
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FLEXOBOND
442: A thermally conductive flexible urethane resin
system for bonding or filleting glass
diodes
or other stress sensitive components while simultaneously
providing a heat flow path.
Has excellent electrical properties, flexibility and is
low outgassing. It
is being used in aerospace applications on circuit boards
and is designed for high reliability.
| Recommended Mixing and
Handling Parameters |
| FLEXOBOND |
202 |
329 |
430 |
431 |
442 |
| Adhesive |
202A |
329A |
430 |
431 |
442 |
| Activator |
BA-400 |
BA-329 |
BA-430 |
BA-431 |
** |
| Activator
Required, parts by weight per hundred of adhesive |
35 |
25.6 |
50 |
58.3 |
- |
| Mixed
Viscosity at 77°F, cp |
- |
Paste |
800 |
800 |
Heavy
Paste |
| Work
Life at 77°F, minutes |
10 |
60 |
100 |
135 |
240 |
| Recommended
Cure, hr/°F |
2/212 |
2/212 |
2/200 |
24/77
+ 2/212 |
2/180 |
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Typical Cured Properties
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| Color |
Creamy tan |
Black |
Clear straw |
Clear straw |
Gray
black |
| Specific
Gravity |
1.01 |
1.10 |
1.10 |
1.10 |
2.0 |
| Hardness,
Shore A |
90 |
72 |
70 |
89 |
78 |
| Hardness,
Shore D |
40 |
22 |
28 |
43 |
- |
| Bond
Strength to aluminum at 77°F, psi |
900 |
1500 |
450 |
1300 |
500 |
| Water
Absorption (24 hour immersion) at 77°F, % |
0.02 |
- |
<0.1 |
<0.1 |
0.14
(7 days) |
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Click Technical Data Sheet Number
to
receive complete product information
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