We supply SUPER ENGINEERING PLASTICS(SUMIKASUPER LCP, SUMIKAEXCEL PES).
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- Chemical Stabilities
Chemical Resistance
The chemical resistance data for SUMIKASUPER LCP is shown in the table below. SUMIKASUPER LCP possesses outstanding chemical resistance and will not expand or deteriorate when exposed to oils, even at high temperatures. However, the evaluation of effects should be conducted on actual moldings prior to usage.
Table 3-5-1 Chemical Resistance of SUMIKASUPER LCP
| Chemical name | Condition | SUMIKASUPER LCP Evaluation |
|
|---|---|---|---|
| Temperature(°C) | Time | ||
| 20% Hydrochloric acid | 50 | 30 days | G |
| 20% Sulfuric acid | 50 | 30 days | G |
| 40% Nitric acid | 50 | 30 days | G |
| Glacial acetic acid | 50 | 30 days | G |
| 10% Sodium hydroxide | 50 | 30 days | P |
| 10% Ammonia water | 50 | 30 days | P |
| Acetone | Reflux | 100hr | G |
| Methyl ethyl ketone | Reflux | 100hr | G |
| Trichloroethane | Reflux | 100hr | G |
| Methylene chloride | Reflux | 100hr | G |
| Toluene | Reflux | 100hr | G |
| Methanol | Reflux | 100hr | G |
| Ethanol | Reflux | 100hr | G |
| Ethyl acetate | Reflux | 100hr | G |
| Dimethylformamide | Reflux | 100hr | P |
| Gasoline | Room temperature | 30 days | G |
| Engine oil | 120 | 2000hr | G |
| Gear oil | 120 | 2000hr | G |
| Evaluation G | = Good : Reduction of tensile strength 5% or less, Change of weight 2% or less |
| P | = Poor : Not usable |
Gases Generated from Moldings
The amount of gas generated when SUMIKASUPER LCP is heated in moldings is extremely low.
Figure 3-5-2 Analysis Method for Gas Components Generated from Moldings
Figure 3-5-3 Amount of Gas Generated from SUMIKASUPER LCP
Analyzer : Headspace gas chromatograph
Sample pre-treatment conditions : 120°C, 20hr heating
