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.