Weather Resistance
Definition
Ability to resist aging from UV, ozone, and temperature changes.
Historical Background
1980s: formulations extended outdoor lifespan from months to 10+ years.
Example
Automotive tinting yellows in sun. Like sunscreen for adhesive.
Formula
Outdoor Lifespan = f(UV Stabilizers, Antioxidants, Substrate Weather Resistance)
Core Concepts
Antioxidant capacity: stabilizers slow UV/ozone attack on molecular bonds.
Extended Applications
Indoor: 1-3 years; outdoor: 3-5; construction: 10-15; automotive: 15-20; aerospace: 30+ years.