Name: HALS/UVA Combination Stabilizer Blend (50:50)
Brand: Coatingsink
SKU: hals-uv-blend-stab-50
Availability: InStock

Question 1

What is the advantage of a pre-blended HALS/UVA combination versus adding them separately?

Accepted Answer

A pre-blended 50:50 HALS/UVA combination simplifies the formulation process by reducing the number of raw material additions, minimizing weighing errors, and ensuring a consistent synergistic ratio in every batch. Pre-blended liquid products also dissolve faster and more uniformly than solid/liquid combinations added separately. This is particularly valuable in lean manufacturing environments or when reformulating existing products to add UV stability without extensive optimization work.

Question 2

Can this combination stabilizer be used in 2K polyurethane clearcoats?

Accepted Answer

Yes. Both the HALS (piperidyl sebacate type) and benzotriazole UVA components in this blend are compatible with isocyanate-crosslinked 2K PU systems. Standard amine HALS can theoretically react with free isocyanate, but in practice the reaction rate is negligible at room-temperature cure conditions, and the resulting product retains HALS activity. For baking/forced-cure 2K PU systems, an N-alkyl or N-methoxy HALS with confirmed isocyanate compatibility should be verified separately.

Appearance	clear yellow liquid
UVA Component	hydroxyphenyl benzotriazole type
Active Content	≥98%
HALS Component	bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate type
Recommended Dosage	0.5–2.0%

HALS/UVA Combination Stabilizer Blend (50:50)

Specifications

FAQ

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