RTM Injection Resin Release Additive
Key Features
- Internal RTM release additive — supplements external mold release
- Extends external semi-permanent release film life in RTM production
- 0.5–1.0% dosage with no effect on viscosity or injection behavior
- Low outgassing during heated RTM cure up to 80°C
- Parts directly paintable and bondable after demolding
This RTM injection resin release additive is designed to be added directly to RTM injection resin batches as a supplemental internal release component. In RTM production, the closed mold is coated with external semi-permanent release on both mold halves; however, injection pressure and high-flow-rate resin can erode the external release film after repeated cycles. Adding this internal release additive to the injection resin at 0.5–1.0% by weight extends the effective life of the external release film, reduces injection pressure variability due to mold wall friction, and provides insurance against local release failure on mold surfaces where the external film has thinned. Compatible with polyester, vinyl ester, and epoxy RTM injection resins. Does not affect resin viscosity, pot life, or injection flow behavior at recommended dosage. Does not outgas significantly during heated RTM cure cycles up to 80°C. Parts demolded with this additive are directly paintable and bondable without additional surface treatment.
Specifications
| Parameter | Value |
|---|---|
| Type | Internal release additive for RTM resin |
| Outgassing | Low |
| Shelf Life | 18 months |
| Dosage in Resin | 0.5–1.0% by weight |
| Compatible Resins | Polyester, vinyl ester, epoxy (RTM grade) |
| Effect on Viscosity | Negligible |
| Max. Process Temperature | 80°C |
Applications
FAQ
Internal RTM release additive provides the most benefit in high-cycle production (>10 parts per day per mold), on complex geometry molds with deep ribs or fine detail, and when using low-viscosity resins that flow aggressively and can erode external release films. It is also valuable when the external mold release refresh interval cannot be maintained due to production speed — the internal release provides a safety net between external refresh cycles.
Direct Contact
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