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Halogen-free formulation ensuring low smoke density and reduced toxic gas emission during combustion.
Excellent thermal stability compatible with polycarbonate (PC) processing temperatures up to 320 °C.
Maintains high impact strength and dimensional stability of PC resin after compounding.
UL 94 V-0 rated at 1.5 mm thickness without compromising optical clarity in thin-section applications.
Good dispersion characteristics enabling uniform flame retardancy with minimal agglomeration during melt blending.
Electrical enclosures and junction boxes requiring UL-compliant fire safety performance.
LED lighting housings and lens components where flame resistance and light transmission are critical.
Automotive interior trim parts including center consoles and instrument panel components.
IT/office equipment casings such as power adapters, monitors, and network infrastructure housings.
Medical device enclosures subject to stringent flammability and biocompatibility-related regulatory requirements.
| Chemical Type | Phosphorus-based organic flame retardant |
| Product Form | Pellets |
| Appearance | Off-white to light beige free-flowing pellets |
| Primary Applications | Flame-retardant modification of aromatic polycarbonate (PC) |
| Key Features | Halogen-free, UL 94 V-0 (1.5 mm), RoHS compliant |
| Benefits | Retains PC mechanical properties; enables recyclability of FR-PC blends |
| Density (g/cm³) | 1.35–1.42 (at 23 °C) |
| Moisture Content (wt%) | ≤ 0.15 |
Q1: What is the primary polymer compatibility of X-40-9805?
A: Shin-Etsu X-40-9805 is specifically formulated for use in polycarbonate (PC) and PC-based blends, offering good compatibility and minimal impact on transparency and mechanical performance when properly dispersed.
Q2: How does X-40-9805 achieve flame retardancy without halogenated chemistry?
A: X-40-9805 is a non-halogenated, phosphorus-based flame retardant that functions primarily through condensed-phase mechanisms—promoting char formation and reducing heat release during combustion—making it suitable for applications requiring halogen-free compliance.
Q3: What processing methods are recommended for incorporating X-40-9805 into PC?
A: The additive is typically introduced via twin-screw extrusion with careful attention to melt temperature control and residence time to ensure uniform dispersion and avoid thermal degradation. Pre-compounding is strongly recommended over direct addition in injection molding.
Q4: Does X-40-9805 affect the optical clarity or UV stability of PC?
A: When used within recommended dosage ranges, X-40-9805 maintains high transparency and does not significantly accelerate yellowing under standard processing conditions; however, long-term UV exposure performance should be verified in final application testing as it is not inherently UV-stabilized.
Q5: Is X-40-9805 suitable for thin-wall or precision-molded PC parts?
A: Yes—its low volatility and good thermal stability support consistent performance in thin-wall applications, though optimal moldability depends on overall formulation balance, including flow modifiers and thermal stabilizers.
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E-mail: wangxingqiang@ericwchem.com
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