Karstedt Catalyst PT-5000 – Universal Platinum Catalyst for Liquid Silicone Rubber & Silicone Ink
Product Overview for Karstedt Catalyst
PT-5000 is a highly efficient Karstedt-type platinum catalyst designed for hydrosilylation reactions. It enables rapid, low-temperature curing without chloride residues, ensuring high transparency and stability. Ideal for a wide range of silicone formulations, including liquid silicone rubber, pressure-sensitive adhesives, flame-retardant compounds, and silicone inks.
Product Features for Karstedt Catalyst
Zero oxidation state platinum, chloride-free
Promotes fast crosslinking between Si-Vi and Si-H groups
High activity at ambient temperatures
Excellent transparency and color stability
Minimizes side reactions and prevents blackening/yellowing
Product Parameters for Karstedt Catalyst
Platinum content: 3000–5000 ppm
Appearance: Clear to pale yellow liquid
Solubility: Compatible with most silicone oils and polymers
Storage stability: >12 months at room temperature in sealed container
Applications for Karstedt Catalyst
Liquid silicone rubber (LSR)
Pressure-sensitive silicone rubber
Flame-retardant silicone compounds
Silicone inks for printing and coating
Two-part RTV silicone systems
Operating Guidelines for Karstedt Catalyst
Recommended dosage: 0.1–1.0% of total silicone weight
Mix thoroughly with Part A before adding Part B (Si-H component)
Cure temperature: 25–120°C, adjustable based on system requirements
Avoid contact with sulfur, amines, and tin compounds
Precautions for Karstedt Catalyst
Use in well-ventilated areas
Wear gloves and protective eyewear
Avoid exposure to moisture before curing
Store away from heat and direct sunlight
Packaging & Storage for Karstedt Catalyst
Available in 1 kg, 5 kg, 25 kg sealed aluminum bottles or customized packaging
Store in cool, dry place (15–25°C)
Keep container tightly closed
FAQ for Karstedt Catalyst
What is the typical curing time with PT-5000?
At room temperature, full cure is achieved within 2–4 hours depending on formulation.
Can PT-5000 be used for food-contact applications?
Yes, it complies with relevant FDA and EU regulations for indirect food contact.
Does it require an inhibitor?
No, PT-5000 is inhibitor-free and offers stable curing behavior.
Is it compatible with other platinum catalysts?
We recommend consulting our technical team before blending with other catalyst systems.
What is the shelf life?
12 months when stored properly in original unopened packaging.
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