Requirements for Polyurethane Dispersions as Primary Resins in Color Paste Formulation
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Polyurethane dispersions (PUDs) for pigment dispersion must achieve ‌ultra-fine particle size control‌ to ensure colloidal stability and chromatic uniformity, supported by ‌electrostatic/steric stabilization‌ for pH tolerance and thermal resistance. The resin requires ‌broad solvent compatibility‌ with polar/non-polar blends (e.g., alcohols, ketones) to maintain viscosity stability and storage durability. ‌Low ionic content‌ prevents pigment flocculation in aqueous systems, while ‌APEO-free‌ and ‌REACH-compliant‌ formulations address eco-regulatory demands. Optimal storage conditions (5–35°C) and frost protection are critical to preserve dispersion integrity. For application versatility, ‌shear-thinning behavior‌ balances high pigment loading with spray/brush adaptability, complemented by adhesion performance for substrate bonding. Modified ionic architectures (anionic/non-ionic) enhance electrolyte resistance and cross-linking flexibility

Product Introduction
WL-PU212 is an aliphatic waterborne polyurethane dispersion with low viscosity, high elasticity, and good resistance to yellowing, suitable as the main resin for color paste dispersion.

Specification

Properties

l Does not contain N-methylpyrrolidone (NMP) and DMAC, and does not contain organotin;
l The film is soft to form, good hand feel, dry and crisp;
l Excellent resistance to yellowing, up to level 5;
l Good elasticity, high elongation, elongation greater than 600%;
l Good washing fastness;
l Good dispersion of colorants and excellent color development;
l Resistant to over 100000 twists and turns at room temperature.

Application

This product is ideal for applications in apparel jackets, bags, shoe uppers, and similar items. It serves as the primary resin for textile printing inks and can be flexibly blended with acrylic resins to meet specific formulation needs.
Additionally, leveraging our deep technical expertise, we provide tailored solutions and customize formulations to align with precise quality standards and performance targets, ensuring optimal compatibility and functionality for diverse end uses.

Storage Condition

Store the product in a tightly sealed container at temperatures between ‌5°C to 40°C (41°F–104°F)‌. Under these conditions, the formulation retains stable performance for ‌over 6 months‌.
Note: Water evaporation may cause irreversible film; therefore, use the product ‌promptly after opening‌ to ensure optimal functionality.

Packaging
Package: 125 KG/Barrel