LYRIN
Characteristics of LN 139
LN-139 is hydrophobic fumed silica which is produced by hydrophilic fumed silica with specific surface area of 180m2/g after chemical post-treatment with PDMS (Polydimethylsiloxane).
Properties of LN 139
* Good thickening and thixotropic property
* Good anti-sagging properties and excellent stability in epoxy resin
* Excellent reinforcing properties in silicone rubber especially at high filler loading levels and no crepe hardening on aging
* Well suited for transparent system products
* Free-flow aid for water-proof material and powders
Physical & Chemical Data of LN 139 | |||
Properties | Unit | Typical Value | Testing Standard |
Specific surface area(BET) | m2/g | 100±20 | GB/T 20020 |
pH in 4% dispersion |
| 5.5～7.5 | GB/T 20020 |
Loss on drying (2 hour at 105℃) | % | ≤1.5 | GB/T 20020 |
Loss on ignition (2 hour at 1000° based on material dried for 2 hours at 105℃) | % | ≤10 | GB/T 20020 |
Carbon content（based on material dried for 2 hours at 105℃） | % | 4.5 ～6.5 | GB/T 20020 |
Silica content ( Based on ignited material) | % | ≥99.8 | GB/T 20020 |
Tamped density (based on material dried for 2 hours at 105℃) | g/dm² | 40～60 | GB/T 20020 |
