PUD · Heat-Activated Adhesive
YT-503 is an anionic aliphatic waterborne polyurethane dispersion that can be used as a heat-activated adhesive. It offers good bond strength, a relatively high activation temperature, excellent heat resistance and fast crystallization, together with good anti-blocking performance — suitable for adhesive coating applications that demand high activation temperature, bond strength and heat resistance.
Key Specs
- Ionic type
- Anionic
- Appearance
- Semi-milky to milky white
- Solid content
- 39% ± 1
- Specific gravity
- Approx. 1.08 g/mL
- Activation temperature
- 100–110 ℃
- Viscosity (30 °C)
- ≤ 1500 mPa·s (30 ℃)
- Film tensile strength
- 35–50 MPa
- 100% modulus
- 7–8 MPa
Key Features
- High activation temperature, suited to heat-activated adhesive systems
- Good bond strength with strong adhesion to most substrates
- Fast crystallization with good anti-blocking performance
- Excellent heat resistance for applications requiring thermal stability
- Good brushability for easy application
Applications
- Heat-activated adhesives
- Adhesive coatings requiring high activation temperatures
- Adhesive applications requiring anti-blocking performance
- Applications demanding bond strength and heat resistance
Application Notes
For higher water resistance, add approximately 1%–5% crosslinker; mix the two components thoroughly before use. Do not mix with adhesives of a different nature.
Storage
Store at 5–30 °C; avoid freezing, high temperature and direct sunlight. Shelf life: 12 months.
