CASE covers four product classes that share one chemistry problem: the same network has to wet a substrate, cure in the open, survive UV and moisture, and then keep mechanical properties for years.
MCPU formulates CASE systems from the substrate and exposure inward — aliphatic isocyanates where UV stability is non-negotiable, MDI prepolymers where toughness and tear resistance carry the part.
What this application has to hit
- Adhesion to the actual substrate, including low-energy and mixed substrates
- Weathering, hydrolysis and UV stability for exterior exposure
- Tear strength, elongation and abrasion resistance
- Workable pot life and cure schedule for the application method
- Low-VOC and 1K moisture-cure options where site conditions demand it
How MCPU formulates for it
Iron Sentry® fluid-applied roof coating shows the pattern: a fully-adhered, walkable membrane built on UV-stable aliphatic chemistry with a cure profile suited to field application.
Honey Bee® reactive modifiers add renewable content to CASE systems while contributing to network toughness instead of acting as an inert filler.
Prepolymer equivalent weight and chain-extender choice are used to place hard-segment content where tear strength and modulus need it.
Formulation levers we adjust
| Lever | What it controls |
|---|---|
| Isocyanate type | Aliphatic for UV stability; MDI prepolymer for toughness and speed. |
| Chain extender | Sets hard-segment content, modulus and tear resistance. |
| Pot life | Catalyst and blocking chemistry matched to application method. |
| Cure route | 2K, 1K moisture-cure or hybrid depending on site conditions. |
Products used here
- Honey Bee® — Reactive soy-based polyols and modifiers for resilient, lower-carbon polyurethanes.
- Specialty Polyurethane Systems — Custom polyol systems, encapsulants, fluid-applied roof coatings, and rubber-crumb binders.
- Custom Formulation Development — Bench-to-plant formulation development, reverse engineering, and toll-blended production.