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QK3770 Wetting and Dispersing Agent
VOC-free block copolymer dispersant for waterborne wood and industrial coatings and resin-free concentrates.
Positioned against BYK 190
Product Overview
QK3770 is a high molecular weight block copolymer carrying pigment affinity groups, supplied at 40% active in water with no VOC below 1500 ppm. It wets and disperses pigment in waterborne coatings and pigment concentrates, cutting grind time and mill base viscosity while raising gloss, colour strength, transparency and hiding power, especially on organic pigments and carbon black.
Key Benefits
- No VOC below 1500 ppm, so it does not eat into a waterborne VOC budget
- Cuts grind time and mill base viscosity, which frees mill capacity
- Raises gloss, colour strength, transparency and hiding power
- Allows higher pigment loading in the same mill base
- 24-month shelf life stored between 5 and 40C
At A Glance
- Chemistry
- High molecular weight block copolymer with pigment affinity groups
- Family
- Wetting and Dispersing
- Category
- Coating Additives
- Positioned against
- BYK 190
- Appearance reference
- Light yellow liquid
Who It Is For
- Waterborne wood and furniture coating formulators
- Pigment concentrate producers working without resin
- Plants where the bead mill is the bottleneck
Problems It Solves
- Long grind cycles and high mill base viscosity
- Weak colour strength and poor jetness on organic pigment and carbon black
- Dispersants that bring co-solvent into a low-VOC formulation
Application Scenarios
- Waterborne wood coatings
- Waterborne industrial coatings
- Resin-free pigment concentrate production
- Carbon black tinters where jetness matters
Technical Features
- Block copolymer structure with pigment affinity groups for firm anchoring
- 40 +/- 2% active in water, pH 6-8
- Density approximately 1.06 g/cm3
- Grinding must be done in water only, without resin, amine or co-solvent
Typical Data And Dosage
Typical values are indicative of the product and are not release specifications. Figures are reproduced from the manufacturer data sheet.
| Chemical composition | High molecular weight block copolymer solution with pigment affinity groups |
| VOC | None, below 1500 ppm |
| Appearance | Light yellow liquid |
| Active ingredient | 40 +/- 2% |
| Density | Approximately 1.06 g/cm3 |
| pH | 6-8 |
| Solvent | Water |
| Storage | 5-40C, out of direct sunlight |
| Shelf life | 24 months from production date |
| Packing | 25 kg / 200 kg |
Recommended Dosage
All dispersant and additive dosage figures below are quoted exactly as the source data sheet quotes them. Dispersant figures are percentages on pigment weight, not on the total batch. The published values are empirical, so confirm the optimum with a dosage ladder in your own system.
| Inorganic pigments | 10-15% |
| Organic pigments | 30-70% |
| Titanium dioxide | 5-10% |
| Carbon black | 60-120% |
Use Guide
- Grind in water only. Resin, amine and co-solvent must not be present during the grind.
- Mix the additive with water first, then add pigment and grind until fully dispersed.
- Dosage is calculated on pigment, so the carbon black figure of 60-120% is on the carbon black, not on the batch.
- Avoid direct skin contact. If contact occurs, rinse with soap and water.
Quality Control On Your Side
- Measure grind fineness and mill base viscosity before and after the change
- Check jetness and undertone on carbon black tints against a reference
- Store concentrate samples at 5C and 40C to confirm stability
How It Compares With The Alternatives
Technical comparison against other ways of solving the same problem. Nothing here is a performance claim against a named commercial product.
| QK3755 | Very similar chemistry and dosage; QK3755 tolerates a wider organic pigment range and is rated for waterborne ink. |
| QK3740 | QK3740 is 100% active with no water carried in; QK3770 is 40% active and easier to meter at low addition. |
| Polyacid dispersant | Block copolymer anchoring holds organic pigment and carbon black that a polyacid cannot stabilise. |
Customisation And Supply
- Packing as published on this page; other pack sizes are confirmed per order
- Technical data sheet and, where available, safety data sheet supplied by email on request
- Tailor-made products can be discussed; send the property you need and the system it goes into
- Shipped from Tianjin, China by sea or air
QK3770 Wetting and Dispersing Agent Questions
Why must the grind be resin-free?
Is the 60-120% carbon black figure on the batch?
Does QK3770 add VOC?
What is the shelf life?
Products Often Considered Alongside This One
QK3755 Wetting and Dispersing Agent
VOC-free block copolymer for resin-free waterborne concentrates carrying 30-60% pigment.
View technical data
QK3730 Wetting and Dispersing Agent
APEO-free dispersant built for carbon black and organic pigment in waterborne ink, inkjet and leather coatings.
View technical data
QK3778 Waterborne Dispersant
Universal waterborne dispersant at 60% active that handles every pigment class including anti-corrosive fillers.
View technical dataGuides That Cover This Product
Where It Is Used
Request QK3770 Wetting and Dispersing Agent
Send your system type, pigment loading and required quantity. A quotation and the full data sheet come back by email.