Anti-Yellowing Platinum Catalyst PT-5000YC – Long Shelf Life for Clear Silicone Adhesives
Product Overview for Platinum Catalyst
PT-5000YC is a premium anti-yellowing Karstedt catalyst designed for applications where long-term clarity and color stability are critical. It extends shelf life at room temperature and prevents discoloration in clear adhesives, sealants, and vulcanizing agents.
Product Features for Platinum Catalyst
Superior UV and thermal yellowing resistance
Extended pot life without inhibitor addition
Maintains transparency comparable to Japanese and US benchmarks
Product Parameters for Platinum Catalyst
Platinum content: 3000–4500 ppm
Yellowing index (ΔYI): < 1.0 after 500 hrs UV exposure
Storage stability: >18 months at 25°C
Applications for Platinum Catalyst
Anti-yellowing liquid silicone adhesives
Platinum-cured vulcanizing agents
Optical clear encapsulants
Display and lighting sealants
Operating Guidelines for Platinum Catalyst
Dosage: 0.1–0.8% based on total formulation
Compatible with most vinyl-functional silicone resins
Cure schedule: 70–100°C for 1–3 hours recommended
Precautions for Platinum Catalyst
Avoid contact with nitrogen- or sulfur-containing compounds
Store away from strong light sources
Packaging & Storage for Platinum Catalyst
1 kg, 5 kg sealed aluminum cans
Store in cool, dry place (10–30°C)
FAQ for Platinum Catalyst
How does PT-5000YC prevent yellowing?
It uses a purified platinum complex that minimizes side reactions forming chromophores.
Can it be used outdoors?
Yes, it offers excellent UV and weathering resistance.
Is it suitable for medical-grade silicones?
Yes, it complies with USP Class VI and ISO 10993 standards.
What is the difference between PT-5000YC and PT-5000V?
PT-5000YC is optimized for adhesives; PT-5000V is for LSR vulcanization.
Does it require refrigeration?
No, stable at room temperature up to 30°C.
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