GARAMITE-7305 is a powdered rheology additive from BYK, based on organophilic phyllosilicates, formulated for polar solvent-based and solvent-free systems to increase storage duration and sagging resistance. It is widely used across coatings, thermoset composite resins, PVC plastisols, adhesives and sealants, and non-aqueous drilling fluids. This page summarizes the technical and safety data published in the manufacturer’s Technical Data Sheet and Safety Data Sheet.
What Is GARAMITE-7305?
It is composed of organophilic phyllosilicates and delivered as an off-white powder. Compared with conventional organoclays, which usually require high shear forces and polar activators for dispersion, it can be incorporated and activated easily using moderate shear forces. It features a strong pseudoplastic viscosity profile: formulations reach high viscosity in the low shear range for excellent anti-settling and antisyneresis properties, while a major viscosity reduction occurs once shear is applied, improving application properties.
Technical Specifications of GARAMITE-7305
The table below summarizes the core product properties as published in the manufacturer’s Technical Data Sheet (Issue 08/2023) and Safety Data Sheet.
| Property | Value |
|---|---|
| Composition | Organophilic phyllosilicates |
| Delivery form | Powder |
| Appearance / Color | Off-white powder, odourless |
| Loose bulk density | 23–113 kg/m³ |
| Density | 1.6 g/cm³ (20℃) |
| pH (1% concentration) | 5–7 (20℃) |
| Auto-ignition temperature | 340℃ (dust layer); 550℃ (dust cloud) |
| Max. storage/transport temperature | 40℃ |
Per its Safety Data Sheet, it is not classified as a hazardous substance or mixture under GHS, and no hazardous ingredients are listed in its composition. Water solubility is insoluble, and the minimum explosible dust concentration is 1,000–1,100 g/m³.
Applications and Dosage Levels for GARAMITE-7305
Recommended dosage varies by application, as outlined in the manufacturer’s Technical Data Sheet. Actual dosage should be confirmed through application-related test series.
| Application | Recommended Level |
|---|---|
| Liquid coatings (architectural, protective, industrial) | 0.5–2% of total formulation |
| Powder coatings | 0.5–4% of total formulation |
| Thermoset resins (UP, vinyl ester, PUR, acrylate, epoxy) | 0.5–5% based on resin content |
| PVC plastisols | 1–5% of total formulation |
| Detergents and cleaning products | 0.5–3% of total formulation |
| Adhesives and sealants | 0.5–5% of total formulation |
| Non-aqueous drilling fluids | 1.4–2.8 kg/m³ of total formulation |
Using GARAMITE-7305 in Thermoset Composite Resins
For unsaturated polyester and vinyl ester resin systems, the manufacturer recommends preparing a premixture in styrene to achieve full efficacy at dosages of 0.5–2%: 8 to 12% of the additive is incorporated into styrene, producing a mixture that remains pumpable and flowable for later dosing into the resin. Deaerators are advisable to reduce air bubbles. Combining it with booster additives such as RHEOBYK-R 605/R 606 (UP/VE/PUR) or RHEOBYK-R 607 (EP/PUR) can reduce required content, allow higher layer thicknesses, and shift the rheology profile from pseudoplastic toward thixotropic behavior with reduced thixotropic drift over time. This additive can be sourced alongside other auxiliary agent products for FRP and composite formulation.
Safety, Handling, and Storage for GARAMITE-7305
According to its Safety Data Sheet, this additive is not a hazardous substance or mixture and carries no GHS label elements. The main handling precaution relates to dust: fine dust dispersed in air in sufficient concentration, in the presence of an ignition source, is a potential dust explosion hazard, so dust deposits should not be allowed to accumulate on surfaces and appropriate exhaust ventilation should be provided where dust is formed.
Recommended personal protective equipment includes suitable gloves, safety glasses, and a protective suit. For storage, keep it in a dry place; no decomposition occurs if it is stored and applied as directed, and storage or transport temperature should not exceed 40℃.
Sourcing GARAMITE-7305 Through chemicalsstore.com
Coatings formulators, composite fabricators, and adhesive and sealant manufacturers sourcing rheology additives such as GARAMITE-7305 can contact chemicalsstore.com for current availability, supply chain resource support, and coordination on order volumes, lead times, and documentation requests, including the manufacturer’s Technical Data Sheet and Safety Data Sheet.
Frequently Asked Questions About GARAMITE-7305
What is it made of?
It is composed of organophilic phyllosilicates, supplied as an off-white powder, per its Technical Data Sheet.
Is GARAMITE-7305 a hazardous material?
No. According to its Safety Data Sheet, it is not classified as a hazardous substance or mixture and contains no hazardous ingredients.
What dosage is recommended for unsaturated polyester or vinyl ester resins?
0.5–5% based on resin content, or 0.5–2% when premixed in styrene at an 8–12% concentration, as outlined in the Technical Data Sheet.
How should it be stored?
Keep it in a dry place at a temperature not exceeding 40℃. No decomposition occurs if stored and applied as directed.
What applications is it used in?
Liquid and powder coatings, thermoset composite resins, PVC plastisols, detergents and cleaning products, adhesives and sealants, and non-aqueous drilling fluids.
To request current availability, technical documentation, or a formal quotation for GARAMITE-7305, contact the chemicalsstore.com sourcing team with your target volume and application details.
