Vinyl‑Modified Siliceous Earth is vinyl‑silane surface‑treated mineral filler as direct replacement for Aktisil VM56. The vinyl functional groups on particle surfaces participate in radical polymerization. When incorporated into UV‑curable coatings, unsaturated polyester and FRP formulations, it improves filler‑resin interfacial adhesion, boosts composite hardness, reduces shrinkage and optimizes surface finish of cured parts

Product Detail

Product Overview Vinyl‑Modified Siliceous Earth (CAS 61790‑53‑2, Aktisil VM56 Equivalent) is natural siliceous earth subjected to vinyl‑silane surface modification. Reactive vinyl moieties on the mineral surface can take part in free‑radical curing reactions together with resin monomers. After homogeneous dispersion within UV coating, unsaturated polyester and FRP matrix, the modified filler establishes strong interfacial linkage between inorganic mineral and organic polymer. It effectively lowers curing shrinkage, enhances rigidity, scratch resistance and thermal dimensional stability of cured composite materials. This mineral filler is suitable for UV industrial coatings, unsaturated polyester casting resins and fiber‑reinforced plastic manufacturing.

Key Features ‑ Vinyl‑silane surface treatment enables radical co‑curing with unsaturated resin systems ‑ Improves interfacial adhesion between mineral filler and polymer matrix ‑ Reduces curing shrinkage and enhances rigidity of FRP and unsaturated polyester parts ‑ Exhibits good compatibility for UV‑curable coating formulations ‑ Direct functional equivalent grade for Aktisil VM56 reactive mineral filler

Typical Technical Properties ‑ Chemical Type: Vinyl‑silane modified natural siliceous earth ‑ Appearance: Off‑white fine free‑flowing powder ‑ Particle Size: Refer to TDS ‑ Bulk Density: Refer to TDS ‑ Silane Treatment Loading: Refer to TDS

Applications ‑ UV‑curable industrial coating: Reinforcing mineral filler for UV topcoat formulations ‑ Unsaturated polyester resin: Functional filler for polyester casting and moulding compounds ‑ FRP composite production: Reinforcing mineral filler for glass‑fiber‑reinforced plastic parts ‑ Composite material plant: Reactive mineral raw filler for thermoset composite formulations

Processing Recommendation Add vinyl‑modified siliceous earth during high‑speed dispersion before curing. Ensure adequate deaeration to avoid trapped air bubbles inside composite parts. Adjust filler loading according to targeted mechanical performance and surface requirements. Complete lab curing trials prior to mass production.

Storage & Handling Store in cool, dry warehouse and prevent moisture absorption. Reseal packaging after opening. Wear dust‑proof mask and protective gloves while handling fine mineral powder.

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Vinyl-Modified Siliceous Earth CAS 61790-53-2 UV Coating Unsaturated Polyester FRP Filler (Aktisil VM56 Equivalent)

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.