Addivion DISP 99 is a specialized fiber wetting additive built on a mixture of oligomeric substances with wetting agents and epoxy-functional groups, developed specifically for fiber-reinforced composites. It improves the wetting of glass or carbon fibers, resulting in less air entrapment and porosity, and helps avoid dry spots that increase scrap rates in composite manufacturing.
Addivion DISP 99 Overview
Addivion DISP 99 belongs to a specialized category of processing additives purpose-built for fiber-reinforced plastics rather than general pigment dispersion. The additive’s epoxy-functional groups enable it to embed directly into the resin matrix while its wetting-agent component spreads rapidly across glass or carbon fiber surfaces, displacing trapped air and allowing resin to penetrate fiber bundles more completely during impregnation.
Because the product carries a high content of non-volatile matter, it is particularly well suited to closed-mold processes such as resin transfer molding and vacuum infusion, where reliable fiber wet-out under limited flow pressure is essential to producing void-free parts.
Composite manufacturers using open-mold processes such as hand lay-up and spray-up also benefit from improved fiber wetting, since faster resin penetration through reinforcement reduces the labor time needed to roll out air bubbles and shortens the window during which the laminate remains vulnerable to trapped air. In both open and closed processes, the underlying goal is the same: get resin through the fiber bed as completely and quickly as possible before gelation begins.
Key Features
- Epoxy-functional wetting chemistry: Addivion DISP 99 is a mixture of oligomeric substances with wetting agents and epoxy-functional groups for embedding into the resin matrix.
- Improves wetting of glass fibers and carbon fibers: The additive promotes rapid, thorough fiber wet-out in composite systems.
- Helps reduce air entrapment and porosity: Faster, more complete fiber wetting directly reduces trapped air and resulting porosity.
- Helps avoid dry spots and reduce scrap risk: Improved wetting minimizes dry spot defects that drive part rejection.
- Particularly suitable for closed-mold processes: High non-volatile content supports process suitability in enclosed systems such as RTM and infusion.
Typical Applications
Addivion DISP 99 is primarily used in ambient-curing resin systems for fiber-reinforced composites, including epoxy and vinyl ester systems reinforced with glass or carbon fiber. Faster, more complete fiber wetting also decreases mold fill times, supporting faster part production and improved mold turnover in both open and closed-mold manufacturing.
Because the additive is high-solids and essentially emission-free, it is particularly well suited to closed-mold advanced composite applications where solvent content and cycle time are both tightly controlled. For complementary air release performance in the same epoxy-based flooring and casting systems, formulators often evaluate Addivion SURF 53A alongside this grade.
Technical Specifications
- Composition: Mixture of oligomeric substances with wetting agents
- Density (20°C): 0.89 g/ml
- Epoxy equivalent weight: 250-320 g/eq%
- Non-volatile matter (10 min., 150°C): greater than 90%
- Function: Fiber wetting additive for fiber-reinforced composite systems
Fiber Wetting Mechanism & Closed-Mold Process Suitability
Fiber wetting additives such as Addivion DISP 99 address a distinct challenge from conventional pigment dispersants: rather than stabilizing discrete particles suspended in a liquid, the additive must spread rapidly along continuous fiber surfaces and displace air trapped within tightly packed fiber bundles as resin flows through the reinforcement. The epoxy-functional groups built into the additive allow it to chemically embed into the cured resin matrix rather than remaining as an inert, potentially weakening inclusion, helping preserve the mechanical properties of the finished composite.
The high non-volatile matter content, greater than 90%, is particularly important in closed-mold processes such as resin transfer molding and vacuum infusion, where any volatile component would either evaporate under vacuum or accumulate in ways that compromise part quality. By minimizing dry spots and air entrapment during resin flow, the additive directly reduces the scrap rate associated with visible porosity and incomplete fiber wet-out, while also shortening mold fill times by allowing resin to move more freely through the reinforcement.
Storage Recommendations
- Store in the original, tightly sealed container, protected from moisture.
- Recommended storage and transportation temperature: 5-40°C.
- Separation or turbidity may occur below 5°C; warm to 20°C and mix well before use.
- Shelf life: Up to 36 months in the original, unopened packaging when stored under recommended conditions.
Documentation & Compliance
Each shipment of the product is supported by standard quality and compliance documentation to help customers manage incoming inspection, formulation approval, and downstream regulatory reporting.
- Certificate of Analysis (COA): Provided per batch
- Safety Data Sheet (SDS): Mandatory prior to handling
- Labels: Prepared in accordance with applicable regulations
- Industrial and professional use only
Formulation Guidance
Recommended addition levels are 0.5-3% of the additive as supplied, based on the total formulation. These levels serve as a starting point, with optimal dosage determined through a series of laboratory trials for the target system. The additive can be added at any time during processing, offering formulators flexibility in how it is incorporated into the manufacturing workflow.
For filled unsaturated polyester and epoxy systems that also require inorganic filler wetting alongside fiber wetting, such as SMC, BMC, and pultrusion formulations, formulators may wish to evaluate Addivion DEF 90A as a complementary filler-wetting additive.
Packaging & Logistics
- Packaging: Approved industrial packaging
- MOQ: Subject to packaging configuration
- Lead time: Indicative lead time, to be confirmed upon order acceptance
- Incoterms: Quoted case by case
Addivion DISP 99: Safety & Handling
Addivion DISP 99 should be handled in accordance with standard industrial hygiene practices for composite processing additives. Users are advised to review the Safety Data Sheet prior to handling and to implement appropriate personal protective equipment and engineering controls as specified therein. As with all fiber wetting additives, small-scale compatibility and dosage trials are recommended before full-batch production to confirm fiber wet-out performance and to check for any effect on cure behavior, mechanical properties, or surface finish in the target system.
Safety Data Sheet and destination-compliant labeling information for the product are available upon request. For related additive options, see also Addivion SURF 53A and Addivion DEF 90A.