QK3320 Polyurethane Wetting and Dispersing Agent

Name: QK3320 Polyurethane Wetting and Dispersing Agent
Brand: LIYANG New Chem

80% active polyurethane dispersant for highly polar solventborne systems: automotive, motorcycle and coil coatings.

QK3320 Polyurethane Wetting and Dispersing Agent identification panel showing model code, chemistry family and the grade it is positioned against

Product Overview

QK3320 is a polyurethane-type wetting and dispersing agent for solvent systems, supplied at 80% active in EGDA. The high molecular weight polyurethane backbone carries pigment affinity groups, so it wets fast, cuts grind viscosity sharply and keeps pigment stabilised against flocculation. It is aimed at highly polar resin systems, which is where automotive and coil coatings sit.

Key Benefits

80% active content, so little carrier enters a tightly balanced formulation
Strong viscosity reduction during grinding
Keeps pigment stably dispersed and prevents flocculation
Raises gloss, colour strength, transparency and hiding power
Recoverable by post-addition if the addition order goes wrong

At A Glance

Chemistry: High molecular weight polyurethane copolymer with pigment affinity groups
Family: Wetting and Dispersing
Category: Coating Additives
Appearance reference: Light yellow liquid

Who It Is For

Automotive and motorcycle coating formulators
Coil coating producers
Industrial plants working with high-polarity resin systems

Problems It Solves

Flocculation and colour drift in polar solventborne systems
Grind viscosity that blocks higher pigment loading
Batches where the additive went in after the pigment and the mill base is now unstable

Application Scenarios

Automotive and motorcycle coatings
Highly polar resin industrial coatings
Coil coatings

Technical Features

High molecular weight polyurethane copolymer with pigment affinity groups
80 +/- 2% active, solvent EGDA
Density approximately 1.05 g/cm3
Addition order matters: resin and solvent first, then additive, then pigment

Specification

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 polyurethane copolymer solution with pigment affinity groups
Appearance	Light yellow liquid
Active ingredient	80 +/- 2%
Density	Approximately 1.05 g/cm3
Solvent	EGDA
Storage	10-40C, 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	5-10%
Organic pigments	10-30%
Titanium dioxide	3-5%
Carbon black	60-120%

Use Guide

Premix the resin and solvent components first, add the additive slowly and mix evenly, then add pigment.
If the addition order was wrong, it can be corrected by post-addition, but the additive must go in slowly under high shear.
Keep drums between 10 and 40C and out of direct sunlight.
Avoid direct skin contact; rinse with soap and water if it occurs.

Quality Control On Your Side

Rub-out test on mixed shades to confirm no flocculation
Record grind viscosity so the benefit is measurable against the previous dispersant
Confirm gloss on cured panels, not on wet film

Comparison

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.

QK3340	QK3340 is 45% active for alkyd, acrylic and polyester; QK3320 is 80% active polyurethane for highly polar systems.
QK3310	QK3310 targets epoxy and UV at 100% active; QK3320 targets automotive and coil at 80% active.
Waterborne block copolymer	Built for solvent systems, so no water is introduced into a solventborne formulation.

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

Questions