Name: UV-Curable Acrylate Sealant Base UCA-300
Brand: Coatingsink
SKU: uv-curable-acrylate-sealant-uca
Availability: InStock

Question 1

Which photoinitiator type and loading is recommended with UCA-300?

Accepted Answer

Type I photoinitiators such as TPO or Irgacure 819 at 1–3% loading deliver efficient surface and through-cure. For assemblies with UV shadow zones, adding a latent thermal co-initiator at 0.5% provides a dual-cure safety net in masked areas.

Question 2

How does oxygen inhibition affect UCA-300, and how can surface tack be minimized?

Accepted Answer

The urethane acrylate oligomer backbone provides inherently lower oxygen inhibition than pure acrylate systems. Residual surface tack can be further reduced by incorporating an amine synergist (e.g., DMEA or MDEA) at 0.5–1.0% without significantly affecting pot life.

Question 3

What adhesion to borosilicate glass is achievable without a primer?

Accepted Answer

Lap shear adhesion to borosilicate glass typically exceeds 2 MPa at a 2,000 mJ/cm² dose (365 nm). Addition of a methacrylsilane adhesion promoter at 0.5% can raise values above 4 MPa and improve durability under 85°C/85% RH aging conditions.

Active Content	100%
Density (25°C)	1.12 g/ml
Viscosity (25°C)	8,000–12,000 mPa·s
Refractive Index (25°C)	1.49–1.51
Cure Speed (365 nm, 1000 mW/cm²)	<5 s

UV-Curable Acrylate Sealant Base UCA-300

Specifications

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