Name: Water-based Polyurethane Dispersion With Excellent Flexibility And Elastic Performance For Plastic-substitute
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Water-based Polyurethane Dispersion With Excellent Flexibility And Elastic Performance For Plastic-substitute

Water-based Polyurethane Dispersion with excellent flexibility and elastic recovery provides a high-performance solution for plastic‑substitute coatings on paper, leather, and textiles. This Water-based Polyurethane Dispersion ensures strong adhesion to various substrates, outstanding bending endurance, and good anti‑blocking properties, maintaining film integrity under mechanical stress. As a solvent‑free, low‑VOC system, it supports sustainable formulations and reduces plastic dependency. It is ideally suited for paper barriers, moulded pulp coatings, leather finishing, and textile impregnation, and can be tailored with crosslinkers or additives to enhance durability and water resistance.

Item No :
Water-based Polyurethane Dispersion RHERI®U288
Application :
It can be applied in plastic-substitute fields in various fields such as paper, leather and textile.
Special Feature :
Excellent flexibility and elastic performance

Description

Product Overview

This aqueous polyurethane dispersion is supplied as a bluish-white opalescent liquid, with a solids content of 40 ± 1 % and a pH value ranging from 7.0 to 9.0 at 25 °C. Its viscosity is less than 800 mPa·s (measured by Brookfield at 25 °C). Engineered specifically for plastic‑substitute applications, this aqueous polyurethane dispersion exhibits outstanding flexibility and elastic recovery, combined with strong adhesion to diverse substrates including paper, leather, and textiles. The polyurethane aqueous system also maintains excellent film integrity under repeated bending and dynamic stress, offering a balanced combination of softness and toughness that is critical for barrier and tactile coatings. When stored in originally closed containers at 20 °C, the product remains stable for 6 months after delivery, with a recommended storage temperature range of 5 ~ 30 °C. Freezing, storage above 30 °C, or contamination by bacteria, fungi, or algae may adversely affect the viscosity, average particle size, and overall stability of this aqueous polyurethane dispersion, potentially leading to sedimentation or irreversible coagulation.

Water-based Polyurethane Dispersion

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Key Features

◊ Exceptional Flexibility and Elastic Resilience

This aqueous polyurethane resin is specifically engineered to deliver superior flexibility and remarkable elastic recovery, making it an ideal binder for plastic‑substitute coatings on paper, leather, and textile substrates. The unique polymer architecture ensures that the dried film withstands repeated flexing, creasing, and dynamic deformation without cracking or loss of mechanical integrity, thereby preserving the coated article’s dimensional stability and tactile quality throughout its service life. Unlike conventional rigid polymers, this resin maintains a soft‑yet‑tough balance, which is critical for applications requiring drapeability and impact resistance.

◊ Broad Adhesion and Excellent Anti‑blocking Performance

The polyurethane aqueous system exhibits strong adhesion to a wide range of polar and non‑polar surfaces, including cellulose‑based paper, treated leather, and synthetic textiles, owing to its optimal surface tension and wetting characteristics. In addition, it offers outstanding anti‑blocking properties, preventing stacked or rolled coated materials from sticking together during storage and converting processes. This combination of adhesion and non‑tackiness enhances processing efficiency and reduces production defects, ensuring consistent coating quality in high‑speed industrial lines.

◊ Solvent‑free, Low‑VOC Formulation with Superior Film Formation

As a solvent‑free waterborne polyurethane dispersion, this product provides a low‑VOC and environmentally responsible alternative to solvent‑borne systems, supporting global sustainability initiatives and regulatory compliance. It exhibits excellent film‑forming behaviour at ambient conditions, producing uniform, pinhole‑free coatings with controlled surface smoothness. The dispersion is compatible with common crosslinkers, matting agents, and rheology modifiers, enabling formulators to tailor hardness, gloss, and water resistance while retaining the inherent flexibility and elasticity of the base polymer.

◊ Reliable Storage Stability and Handling Robustness

When stored in original unopened containers at 20 °C, this aqueous polyurethane dispersion remains stable for six months post‑delivery, with a recommended temperature range of 5–30 °C. Proper storage preserves viscosity, average particle size, and overall colloidal stability, preventing sedimentation or irreversible coagulation. However, freezing, exposure to temperatures above 30 °C, or microbial contamination (bacteria, fungi, or algae) may adversely affect product performance, underscoring the importance of adherence to recommended handling guidelines for consistent industrial application.

Parameter	Typical Value	Unit	Notes
Appearance	milky liquid	–	Visual inspection
Solid Content	40±1	%	Can be adjusted for formulation
Viscosity (25°C, Brookfield RV)	<800	mPa·s	Spindle 3, 20 rpm
Color	<1 # (Fe-Co)	/	/
Density (25°C)	1.05–1.15	g/cm³	Typical value
Recommended Solvents	Water	–	For formulation compatibility
Shelf Life	12	months	Stored in sealed containers at 5–35°C
Storage	Cool, dry place	–	Avoid direct sunlight and moisture

pH(25C°)	7.0 - 9.0
Modulus(Mpa)	0.5
Elongation%	1100
Tensile Srtrength(Mpa)	2.5

Applications

◊ Paper‑based food packaging – the aqueous urethane dispersion serves as a high‑performance replacement for polyethylene extrusion coatings, delivering exceptional flexibility and elastic recovery to withstand folding, creasing, and heat‑sealing operations without film cracking or loss of barrier integrity.

◊ Molded pulp tableware – the waterborne urethane binder forms a continuous, pinhole‑free barrier layer that resists oil and moisture penetration, while its outstanding elasticity ensures the coating remains intact under mechanical stress during filling, stacking, and transportation, effectively replacing plastic inner liners.

◊ Coated release liners and self‑adhesive labels – the polyurethane aqueous resin imparts strong adhesion to cellulosic substrates and excellent anti‑blocking properties, enabling smooth die‑cutting, rewinding, and converting, thus eliminating the need for conventional plastic film backings in label constructions.

◊ Flexible packaging films (paper‑based) – the urethane‑based waterborne system provides a tough yet pliable topcoat that substitutes fossil‑based plastic layers, maintaining dimensional stability and printability under varying humidity, while its elastic nature prevents curl and edge warping in finished pouches and sachets.

◊ Decorative laminates and gift wrapping papers – the waterborne urethane polymer enhances surface abrasion resistance, gloss, and soft tactility, while preserving the inherent flexibility required for intricate folding and embossing, offering a sustainable alternative to PET or BOPP film lamination.

Benefits

◊ Enhances the durability and service life of plastic‑substitute coated articles, as the aqueous polyurethane binder delivers exceptional flexibility and elastic recovery, effectively preventing film cracking and delamination during repeated folding, creasing, and dynamic impact—critical for paper‑based packaging and flexible substrates.
◊ Provides strong, reliable adhesion to a wide range of substrates—including paper, leather, and textiles—owing to the polyurethane aqueous dispersion’s optimized surface wetting and polar/non‑polar compatibility, which reduces coating delamination risks and ensures consistent interfacial bonding in demanding converting processes.
◊ Supports sustainable manufacturing with a solvent‑free, low‑VOC formulation; this waterborne urethane resin significantly lowers volatile organic compound emissions compared to solvent‑borne alternatives, helping converters meet stringent environmental regulations and corporate sustainability targets without compromising mechanical performance.
◊ Offers exceptional formulation versatility, as the urethane‑based waterborne system is readily combinable with crosslinkers, matting agents, and rheology modifiers to tailor hardness, gloss, and water resistance, enabling customized coating solutions for diverse end‑uses such as moulded pulp, coated labels, and synthetic leather.
◊ Ensures consistent production reliability through robust storage stability; the aqueous urethane dispersion maintains viscosity, particle size, and colloidal integrity for six months at recommended storage conditions (5–30 °C), minimising batch‑to‑batch variation and reducing material waste in industrial operations.
◊ Improves haptic quality and surface aesthetics, as the waterborne polyurethane polymer forms a smooth, uniform film with a pleasant soft feel and good anti‑blocking properties, enhancing the tactile experience of finished goods while preserving design clarity and printability on coated surfaces.

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