For Specialty Product Developments
Polyurethane Dispersions (PUDs) boast excellent adhesion to various substrates, flexibility, toughness, and resistance to abrasion, chemicals, solvents, and water. PUDs consist of polyurethane particles suspended in water, resulting in a stable colloidal suspension. Unlike traditional solvent based polyurethane coatings, PUDs provide a more environmentally friendly alternative with low volatile organic compound (VOC) emissions and reduced health hazards.
Aliphatic Polyester PUD
| Typical Parameters | |
|---|---|
| % Solids | 35 ± 1% |
| Viscosity | < 450 cPs |
| % Elongation | < 220% |
Solvent Resistant, Aliphatic PUD
| Typical Parameters | |
|---|---|
| % Solids | 35 ± 1% |
| Viscosity | < 450 cPs |
| Konig Hardness | 160 |
PUD for Textile & Leather Inks
| Typical Parameters | |
|---|---|
| % Solids | 40 ± 1% |
| Viscosity | < 450 cPs |
| % Elongation | 600% – 800% |
Barrier coatings are dispersions of film forming polymers, additives, and possibly pigments. Barrier coatings seal the substrate surface and protect the packaging from external and internal influences. The packaging remains attractive and can fulfil its functionality without restrictions. Depending on the product, barrier coatings offer adequate protection against fat, water, water vapor, dairy products, alcohol, oil, or alkali for the packaging.
Water, Oil & Grease Resistant
| Typical Parameters | |
|---|---|
| % Solids | 49 ± 1% |
| Viscosity | 150 – 300 cPs |
| Particle size | 150 – 170 nm |
Emulsion for Cupstock coatings
| Typical Parameters | |
|---|---|
| % Solids | 48 ± 1% |
| Viscosity | 1000 – 3000 cPs |
| Particle size | 220 – 240 nm |
Moisture Vapor Resistant
| Typical Parameters | |
|---|---|
| % Solids | 50 ± 1% |
| Viscosity | 1000 – 3000 cPs |
| Particle size | 150 – 170 nm |
There are increasing demands for replacing polyethylene (PE) with an aqueous coating which can seal the paper material on application of heat. Most polymers in aqueous coatings are amorphous and do not have a melting point as PE (110°C). Therefore, they often gradually soften or become sticky at elevated temperature (49-54°C). Hence maintaining the glass transition temperature of the binder for such applications becomes a very critical parameter.
For paper-paper sealing
| Typical Parameters | |
|---|---|
| % Solids | 49 ± 1% |
| Viscosity | 20 – 100 cPs |
| Heat Activation Temperature | 90oC |
For aluminum/paper laminates
| Typical Parameters | |
|---|---|
| % Solids | 34 ± 1% |
| Viscosity | 10 – 150 cPs |
| Heat Activation Temperature | 80oC |
For difficult to bond substrates
| Typical Parameters | |
|---|---|
| % Solids | 40 ± 2% |
| Viscosity | 15 – 200 cPs |
| Heat Activation Temperature | 50oC |