Name: Rubber-Toughened Cyanoacrylate Adhesive RTC-50
Brand: Coatingsink
SKU: cyanoacrylate-with-rubber-toughener
Availability: InStock

Question 1

What is the fixture time of RTC-50 on steel and nitrile rubber?

Accepted Answer

On mild steel, handling strength is reached in 30–60 seconds. On nitrile rubber, where surface alkalinity accelerates anionic polymerisation, fixture time shortens to 10–20 seconds. Full mechanical strength develops within 24 hours at 23°C / 50% RH.

Question 2

Why does RTC-50 outperform standard cyanoacrylates in peel and impact tests?

Accepted Answer

The dispersed acrylic rubber phase acts as an impact modifier: crack propagation energy is absorbed at the rubber–matrix interface rather than running through the brittle cyanoacrylate network. This raises T-peel strength from ~2 N/mm (standard ethyl CA) to >6 N/mm and approximately doubles Charpy impact energy on bonded polypropylene joints.

Question 3

Can RTC-50 bond EPDM rubber without a primer?

Accepted Answer

EPDM is non-polar and low-surface-energy, so a dedicated CA primer (polyalkylene-imine activator) is strongly recommended. Apply a thin primer coat, allow 60 seconds flash-off, then apply RTC-50. Primer-assisted bonds on EPDM typically exceed 4 N/mm T-peel versus <1 N/mm without surface activation.

Viscosity (25°C)	50–80 mPa·s
T-Peel Strength (steel)	>6 N/mm
Full Cure (23°C / 50% RH)	24 h
Lap Shear Strength (steel)	≥22 MPa
Fixture Time (steel, 23°C)	30–60 s

Rubber-Toughened Cyanoacrylate Adhesive RTC-50

Specifications

FAQ

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