QC-X (Calcium oxide for dehydrating agent for PVC sols, resins and adhesives)
How QC-X Removes Moisture and Prevents Foaming
QC-X is a calcium oxide moisture scavenger that is added to PVC sols (plastisols), resins and adhesives to capture the moisture held in the material.
Left in place, that moisture turns to steam during heat treatment and forms bubbles and pinholes in the finished part. QC-X removes it beforehand, protecting surface smoothness and bond strength.
Chemical absorption — an irreversible reaction
Unlike physical adsorbents such as silica gel, calcium oxide takes up water through a chemical reaction. The moisture it captures is therefore not released again, even at elevated temperatures.
Reaction:
CaO (QC-X) + H2O (moisture) → Ca(OH)2 (calcium hydroxide)
Features of QC-X
Compared with ordinary calcium oxide, QC-X is designed specifically for compounding into resins and adhesives. It combines a fine particle size with a gentle rate of reaction, so it delivers its dehydrating effect while keeping the rise in compound viscosity under control.
- High purity with a fine particle design
- High dispersibility for uniform dehydration
- Gentle reactivity, with a high overall dehydration capacity
- Prevents foaming and pinholes during heat treatment
- Reduces whitening and bond failure caused by moisture
QC-X under the electron microscope
QC-X
Applications
QC-X is used across resin, rubber and adhesive systems wherever moisture-driven foaming is a problem.
| Field | Examples |
|---|---|
| PVC sols (plastisols) | Automotive underbody coatings, wallpaper, flooring, sealants |
| Adhesives | One-component polyurethane adhesives, epoxy adhesives, hot melts |
| Rubber products | Preventing foaming during vulcanization, including non-pressurized vulcanization |
| Other resins | Removing moisture from recycled plastics |
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About QC-X
