Polysulfide
CAS: 9080-49-3
Category: Organosulfur Compounds
| Purity | Controlled via physical properties (e.g., viscosity, moisture ≤0.5%, SH content) |
| Molecular Formula | S3²⁻ (Avg. anion); polymer: (-CH2-CH2-Sx-)n |
| Molecular Weight | 96.2 (anion); 1,000-8,000 (avg. polymer) |
| Appearance | Amber to light yellow viscous liquid with characteristic odor. |
| Packaging | 25 kg/plastic or metal drum, 200-250 kg/composite drum, or 1,000 L/IBC tank. |
| Testing Indicators | Viscosity — Brookfield viscometer (ASTM D2196); Thiol (-SH) content — Iodometric/Potentiometric titration; Moisture — Karl Fischer titration (GB/T 6283); Density — Hydrometer (ASTM D1475); Identification — FTIR; Curing characteristics — Rheometer (ASTM D5289); Tensile strength/Hardness — Universal testing machine (ASTM D412, GB/T 528). |
| Storage Notes | Store in a cool, dry, well-ventilated area away from heat and light. Keep container tightly sealed. Isolate from strong oxidizers, acids, and bases. Prevent moisture ingress to avoid premature cross-linking. |
| Lead Time | 10 days |
Used as a base polymer for high-performance fuel-resistant sealants (aerospace, construction), flexibilizer for epoxy resins, binder for solid propellants, and in corrosion-resistant coatings.