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WACKER CROSSLINKER V 84 is a high-performance vinyl-functional crosslinker in Wacker’s CROSSLINKER series, designed for addition-curing silicone rubber systems, rich in reactive vinyl groups for efficient room/heat curing, with excellent process flow and substrate adhesion, solvent-free, halogen-free and heavy metal-free.
High vinyl reactivity - High crosslinking efficiency, fast curing, suitable for room/heat curing
Excellent processability - Low viscosity, easy addition, good flow, improves molding precision
Strong substrate adhesion - Bonds firmly to glass, metal, plastic and various substrates
Eco-friendly - Solvent-free, halogen-free and heavy metal-free, meets high-end material environmental requirements
Broad compatibility - Suitable for solvent-based and solvent-free addition-curing silicone rubber system
Silicone rubber products - Seals, gaskets, tubes, keypads and high-performance silicone rubber parts
Electronic potting - Insulation potting and protection of electronic components and circuit boards
Coatings and release - Crosslinking curing of high-temperature anti-stick coatings and industrial release agents
Medical consumables - Safe crosslinking molding of medical silicone rubber tubes and seals
Industrial adhesives - Curing crosslinking system of high-temperature and weather-resistant silicone adhesives
| Chemical Type | Vinyl-functional polydimethylsiloxane |
| Appearance | Colorless transparent liquid |
| Density (25℃) | 0.97-0.99 g/cm³ |
| Dynamic Viscosity (25℃) | Approx. 80-120 mPa·s |
| Flash Point | >60℃ |
| Vinyl Content | Approx. 0.8-1.0 wt% |
| Application Temperature | Room temperature to 180℃ |
Q1: What is the primary function of WACKER CROSSLINKER V 84 in silicone formulations?
A: WACKER CROSSLINKER V 84 is a platinum-catalyzed addition-cure crosslinker designed to enable efficient network formation in heat-curable liquid silicone rubber (LSR) and high-consistency rubber (HCR) systems. It facilitates stable, reproducible vulcanization without generating by-products.
Q2: Is WACKER CROSSLINKER V 84 compatible with standard platinum catalysts used in LSR processing?
A: Yes — it is formulated for compatibility with common platinum-based catalysts, including Karstedt-type and Speier-type complexes. Optimal performance requires careful matching of catalyst activity and cure profile during formulation development.
Q3: How should WACKER CROSSLINKER V 84 be stored and handled to maintain stability?
A: Store in tightly sealed original containers under cool, dry conditions, away from direct sunlight and sources of heat or moisture. Avoid prolonged exposure to air to prevent potential surface skinning or viscosity changes over time.
Q4: Can WACKER CROSSLINKER V 84 be used in applications requiring regulatory compliance for food contact or medical devices?
A: While the base chemistry is suitable for high-purity silicone systems, final regulatory acceptance depends on the complete formulation, processing conditions, and end-use validation. Customers must conduct appropriate testing and verification per applicable regional requirements.
Q5: What is the typical dosage range for WACKER CROSSLINKER V 84 in LSR formulations?
A: Dosage is formulation-dependent but generally ranges from 0.1% to 2% by weight relative to the base polymer. Precise levels are determined based on desired cure speed, final mechanical properties, and compatibility with other additives.
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E-mail: wangxingqiang@ericwchem.com
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