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1.Chemical Properties(crosslinkability)
S-LEC B/K is a thermoplastic resin with a solvent compatibility. However, because
its molecules contain hydroxyl, it is crosslinkable, making it compatible with
other resins and chemicals. Therefore, by crosslinking, you can use S-LEC B/K
as an insoluble thermosetting resin. There are many examples of products in which
S-LEC B/K is used together with thermosetting resins, and it is possible to achieve
resins with well balanced heat resistance, adhesiveness, and flexibility. Resins
or chemical reagents which react with the second hydroxyl group generally react
with S-LEC B/K. Some typical formulae are shown hereunder. |
1) Reaction with phenolics |
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| 2) Reaction with epoxies |
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| 3) Reaction with melamines |
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| 4)Reaction with isocyanates |
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| 5)Reaction with di-aldehydes |
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2. Resistance to Chemicals
Compared with other resins, S-LEC B/K is particularly resistant to alkalis, although
it is attacked slightly by strong acids and strong alkalis. Its resistance to
solvents can be improved by crosslinking it with other resins. When immersed in
water, S-LEC B/K absorbs 5 to 8% of water, but no more. Repeated wettings and
drying will not cause the coating to become fragile. |
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