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Highly reactive alkoxy-silane crosslinker for rapid room-temperature curing of silicone elastomers.
Excellent storage stability in formulated systems, minimizing premature gelation during shelf life.
Low volatility and low odor profile, supporting safer handling and improved workplace compliance.
Enables excellent adhesion to diverse substrates including glass, metals, and plastics without primers.
Compatible with platinum-catalyzed and condensation-cure silicone formulations for flexible process integration.
Room-temperature vulcanizing (RTV-2) silicone sealants for construction and façade applications.
Electrical encapsulation and potting compounds requiring fast demolding and high dielectric strength.
Automotive gasketing and bonding formulations exposed to thermal cycling and vibration.
Medical-grade silicone adhesives and coatings compliant with ISO 10993 biocompatibility guidelines.
Industrial assembly adhesives for electronics, sensors, and optical components.
| Chemical Type | Alkoxy-functional silane |
| Product Form | Liquid |
| Appearance | Clear, colorless to pale yellow liquid |
| Density (20 °C) | Approx. 1.02–1.05 g/cm³ |
| Viscosity (25 °C) | Approx. 5–8 mPa·s |
| Refractive Index (20 °C) | 1.405–1.415 |
| Primary Applications | RTV-2 silicone sealants, adhesives, and encapsulants |
| Key Features | Fast cure, primerless adhesion, low volatility, hydrolytic stability |
Q1: What is the primary function of Wacker CROSSLINKER V 24 in silicone formulations?
A: Wacker CROSSLINKER V 24 is a platinum-based curing agent designed to facilitate hydrosilylation crosslinking in addition-cure liquid silicone rubber (LSR) and high-consistency rubber (HCR) systems. It enables efficient, low-temperature vulcanization with excellent control over cure kinetics and final elastomer properties.
Q2: Is Wacker CROSSLINKER V 24 compatible with standard addition-cure silicone polymers containing vinyl and Si–H functional groups?
A: Yes, it is specifically formulated for use in platinum-catalyzed addition-cure systems where vinyl-functional silicones react with Si–H crosslinkers. Compatibility requires careful attention to inhibitor type and concentration, as well as avoidance of known platinum poisons such as sulfur-, nitrogen-, or phosphorus-containing compounds.
Q3: How should Wacker CROSSLINKER V 24 be stored and handled to maintain activity?
A: Store in original sealed containers at temperatures between 5 °C and 25 °C, protected from moisture, direct sunlight, and contamination. Avoid prolonged exposure to elevated temperatures or air during handling, as this may affect catalytic stability and shelf life. Always follow good industrial hygiene practices when dispensing.
Q4: What is the typical dosage range for Wacker CROSSLINKER V 24 in LSR formulations?
A: Dosage depends on formulation requirements—including vinyl content, Si–H functionality ratio, desired cure speed, and final physical properties—but generally ranges from 0.1% to 2% by weight relative to the base polymer. Optimization is recommended via small-scale trials under actual processing conditions.
Q5: Can Wacker CROSSLINKER V 24 be used in medical-grade or food-contact silicone applications?
A: Wacker CROSSLINKER V 24 is intended for industrial and technical applications. For medical, pharmaceutical, or food-contact uses, customers must verify compliance with applicable regulatory frameworks through their own qualification process, including biocompatibility testing and full system validation—Wacker does not provide pre-certified status for these end uses.
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E-mail: wangxingqiang@ericwchem.com
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