Non-Transfer Loctite 770-NC Mold Release Agent Composites

LOCTITE FREKOTE 770-NC is a clear, solvent-based, moisture-cured epoxy mold release agent designed for advanced composites and FRP polyester parts. As a semi-permanent release agent, it forms a thin, durable film on the mold surface that supports multiple release cycles per application. The product serves industrial clients in fiberglass fabrication, composite manufacturing, and thermoplastic molding operations.

Composition of 770-NC Semi-Permanent Release Agent

Solvent-Based Formulation

FREKOTE 770-NC is a one-part solvent-based system. The solvent carrier allows for easy application by wiping or spraying, and evaporates during the drying process to leave a thin release film on the mold surface.

Epoxy Polymer Chemistry

The release film is based on epoxy polymer chemistry that cures through moisture reaction. Once cured, the film bonds to the mold surface and provides a low-surface-energy layer that prevents resin adhesion during the molding process.

Semi-Permanent Mechanism

Unlike sacrificial release agents that transfer with each part, the semi-permanent film remains on the mold surface through multiple molding cycles. The number of releases per application depends on mold temperature, resin type, and part geometry.

Technical Data of FRP Mold Release Agent

Composite Molding Applications of Release Agent

Fiberglass Yacht and Marine Composites

In fiberglass yacht and boat manufacturing, FREKOTE 770-NC supports the production of hulls, decks, and other large FRP components. The high-gloss finish contributes to the surface quality of finished marine parts.

Wind Energy Composite Components

Wind turbine blade manufacturers use the release agent for large-scale composite blade production. The semi-permanent nature reduces application frequency compared to sacrificial release agents, supporting higher production throughput.

Automotive and Transportation Composites

Automotive composite parts, including body panels and structural components, benefit from the release agent's thermal stability and gloss properties. The product supports both open-mold and closed-mold composite manufacturing processes.

Sports and Recreation Equipment

Fiberglass and carbon fiber sports equipment such as kayaks, snowboards, and bicycle frames use the release agent during molding. The high-gloss surface finish reduces post-processing requirements for cosmetic parts.

Application Guidelines for 770-NC Release Agent

Surface Preparation

Mold surfaces must be clean, dry, and free of contaminants, previous release agent residues, and polishing compounds. New molds may require sealant application before release agent use. Porous mold surfaces should be sealed properly to ensure uniform film formation.

Application Methods

The release agent can be applied by wiping or spraying. Wipe application is common for smaller molds or detailed surfaces, while spray application is efficient for large, open molds. Multiple thin coats provide better coverage than a single thick coat.

Coating and Drying Procedure

Apply the first coat evenly and allow 5 minutes of drying time at 20°C before applying subsequent coats. A typical application requires 3 to 5 coats, with 5-minute flash intervals between coats. After the final coat, allow 10 minutes for full cure before the first molding cycle.

Mold Maintenance

Between production runs, the mold surface can be wiped with a clean cloth to remove accumulated resin residues. Reapplication frequency depends on mold temperature, part complexity, and resin system. Signs that reapplication is needed include increased part sticking or surface finish degradation.

FAQ About FREKOTE 770-NC

How many release cycles can I expect from one application?

The number of releases per application varies based on mold temperature, resin type, part geometry, and surface preparation. Semi-permanent release agents typically support multiple cycles per application, compared to single-cycle sacrificial agents.

What resin systems is 770-NC compatible with?

FREKOTE 770-NC is formulated for advanced composites and FRP polyester parts, including polyester, vinyl ester, and epoxy resin systems. Compatibility with specific resin formulations should be verified through testing.

Can 770-NC be used on all mold materials?

The release agent is suitable for most mold materials including metal, fiberglass, and composite tooling. Porous mold surfaces may require sealing before release agent application.

What is the difference between semi-permanent and sacrificial release agents?

Semi-permanent release agents form a durable film that stays on the mold through multiple release cycles. Sacrificial release agents transfer to the part with each molding cycle and require reapplication after each use. Semi-permanent agents generally provide higher gloss and reduce application labor.