- reduce surface tension to extrem low values
- help to avoid coating defects – especially on contaminated or difficult surfaces.
- can improve leveling and gloss
- do not show negative impact on adhesion and recoatability
Bioaccumulation is the challenge – branches the solution
Traditional approach - reducing chaing length
Know how: Tivida® FL for environmentally friendly products with excellent performance
Fluorosurfactants are indispensable additives for paints, coatings and inks. They reduce the surface tension to extreme low levels by their concentration at the liquid-air interface. Fluorosurfactants provide smooth and defect free coatings especially on contaminated surfaces. However, surfactants with more than six perfluorinated carbons in one chain are accumulative in living organism and toxic. This has led to the withdrawal of these long chain fluorosurfactants from the market in Europe and the United States.
Attempts with surfactants based on a single perfluoro chain with 6, 4 or 2 carbon atoms didn't provide the expected breakthrough – they indeed had a better environmental profile but were however less effective.
New approach by EMD - short branched chains
- The structural design promotes a very high packing density of the hydrophobic groups at the liquid-air interface – and reduces the static surface tension to extremely low values.
- Due to the branching, the diffusion rate of such molecules is higher leading to positive effects on the dynamic surface tension.
- Whereas linear surfactants tend to stabilize foam lamellae, the branched structures of Tivida® FL reduce the foam formation – for even more smoothness and gloss.
For every application just the right product
Tivida® FL – more luster and smoothness for coatings, inks and floors
Excellent performance and environmental profiles are the unique properties of all three fluorosurfactants of the Tivida® FL family. But each of them has its own particular advantages.
Improved leveling, less foam, and excellent environmental properties
Multiple benefits of Tivida® FL
The multiple benefits of the Tivida® FL family are their special functions distinguishing them from linear C6 fluorosurfactants – for undisturbed glossy surfaces.
For verification the foaming behavior of Tivida® FL 2300 was tested in a water based acrylic melamine coatings system using the Tego Foam Test (ASTM D1173-53). Three 50 ml samples of paint were stirred for one minute at 2300 rpm: without fluorosurfactants, with linear C6 fluorosurfactants and with branched Tivida® FL 2300. Afterwards the height of 45 g of the stirred paint was measured with a graduated cylinder. The result is obvious: Paint with Tivida® FL 2300 has a significantly smaller volume compared to paint with linear fluorosurfactants. It can be expected that this will result in improved processing properties of the paint – and far less defects in the final coatings layer.
Intercoat adhesion and recoatability
|Toxicological Test||Test Method||Test Result|
|Skin irritation (in vitro)||OECD 439||Not irritating|
|Eye irritation (in vitro)||OECD 437||Not irritating|
|Skin sensitization (LLNA)||OECD 429||Not sensitizing|
|Acute oral toxicity||OECD 423||No adverse effects found (tested up to 2000 mg/kg bodyweight)|
|Acute inhalation toxicity||OECD 403||No lethality occurred (tested up to 5.5 mg/l air)|
|28-day subacute oral toxicity||OECD 407||No observed adverse effect level (NOAEL): 1000 mg/kg body weight|
|Gene mutation test in bacteria (Ames)||OECD 471||Negative (no signs for mutagenicity)|
|Micronucleus (in vitro; screening)||OECD 487||Negative (no signs for mutagenicity)|
|Biodegradability||OECD 301F||Not ready biodegradable|
|Acute immobilization test in Daphnia magna||OECD 202||48 h EC50 > 100 mg/l (nominal concentration)|
|Algae growth inhibition test||OECD 201||72 h EC50 > 100 mg/l (nominal concentration)|
|Acute fish toxicity test||OECD 203||96 h LC50 > 100 mg/l (nominal concentration)|
|Bioaccumulation in fish (screening)||OECD 305||Not bioaccumulative, Bioconcentration Factor: 20*|