When formulating vinyl esters, epoxy resins, unsaturated polyesters, or gel coats, achieving the right balance between sag resistance, leveling, and easy processing is a constant challenge. Fumed silica is a go-to thixotrope, but it can be difficult to incorporate fully, may lead to delamination, and sometimes requires high loadings to achieve the desired anti-sag performance.
For years, RHEOBYK-R 605 has been a benchmark liquid rheology additive designed to solve these issues. Today, formulators have a powerful, high-performance, and economical alternative: AgeSin® RH-A5605E.
AgeSin® RH-A5605E is a liquid rheology additive based on a polyhydroxy carboxamide solution. It is specifically engineered as a direct, cost-effective substitute for RHEOBYK-R 605. Its primary function is to enhance and stabilize the thixotropic network built by fumed silica or organoclays in various resin systems, leading to easier processing, superior stability, and optimized performance.
Composition: Polyhydroxy Carboxamide solution
Appearance: Light yellow liquid
Density (20°C): 0.93 g/cm³
Non-Volatile Content: 50%
Solvent: Xylene
This product delivers a compelling combination of performance and value, making it an ideal choice for formulators:
Proven Performance as an R 605 Alternative: AgeSin® RH-A5605E is designed to match or exceed the performance of the established benchmark, RHEOBYK-R 605, offering a reliable drop-in solution for your existing formulations.
Enhanced Thixotropy & Sag Resistance: It strengthens the hydrogen-bonding network of fumed silica, significantly boosting thixotropic behavior. This allows you to achieve high anti-sag performance even with lower silica loadings.
Prevents Delamination & Settling: A small addition (as low as 5% based on silica) effectively stabilizes silica in laminated resins, preventing separation during storage. It also prevents filler sedimentation in systems like polyether polyols.
Activates Hydrophilic Fumed Silica: Particularly effective in vinyl ester resins, it activates hydrophilic fumed silica, improving its efficiency and dispersion.
Improves Processing: By making silica easier to incorporate and wet, it reduces mixing time and improves the overall flow, leveling, and deaeration properties of your compound.
Cost-Effective Formulation: As an economical version, it helps reduce overall formulation costs without compromising on critical rheological performance.
AgeSin® RH-A5605E is versatile and finds use in multiple demanding applications:
1. Composite & Coatings Resins (Vinyl Ester, Epoxy, UPR, Gel Coat):
It acts as a thixotropy enhancer, ensuring your resin has the right body for vertical applications without sacrificing finish quality.
Suggested Addition: 10-30% based on fumed silica (20-50% for vinyl esters).
2. Adhesives & Sealants (Polyurethane, Acrylate):
Ideal for systems reliant on silica or clay for thickness, it enhances the network structure for superior sag resistance and application properties.
Suggested Addition: 10-30% based on fumed silica or organoclay.
3. Filler Stabilization:
It can be used to stabilize other fillers and molecular sieves (e.g., zeolites) in various carriers to prevent settling.
Incorporation: For best results, add AgeSin® RH-A5605E to the resin under continuous stirring before introducing the fumed silica, organoclay, or filler. It can also be added post-dispersion to adjust rheology.
Packaging: Available in 25 kg, 30 kg, and 180 kg drums for flexible scaling from R&D to full production.
Storage: Store in a cool, dry, well-ventilated place in the original, tightly sealed container. The product has a shelf life of 24 months.
AgeSin® RH-A5605E offers formulators a trusted, economical path to superior rheology control. By providing performance equivalent to RHEOBYK-R 605, it enables you to optimize costs, streamline production, and achieve consistent, high-quality results in your composite, coating, and adhesive applications.
Contact us today to request a sample or speak with our technical team about how AgeSin® RH-A5605E can be integrated into your specific system.
