Name: Oxime Silicone Crosslinker SCOX-200
Brand: Coatingsink
SKU: silicone-crosslinker-oxime-scox
Availability: InStock

Question 1

What makes oxime crosslinkers preferable to acetoxy types for sensitive substrate applications?

Accepted Answer

SCOX-200 (methyltris(methylethylketoxime)silane) releases methyl ethyl ketoxime (MEKO) rather than acetic acid upon moisture cure. MEKO has a near-neutral pH and is non-corrosive, making SCOX-200 compatible with copper windings, galvanized steel, anodised aluminium, and populated PCB assemblies where acid by-products would cause corrosion or interfere with electrical contacts.

Question 2

How does SCOX-200 dosage affect the mechanical properties of the cured sealant?

Accepted Answer

At 5–7 phr, SCOX-200 produces a soft, low-modulus network with Shore A hardness of 15–25 and elongation at break exceeding 400%, which is ideal for façade glazing and expansion joints. Increasing dosage to 8–10 phr raises cross-link density, increasing Shore A to 30–40 and tensile strength, but reduces elongation. For electronic potting where dimensional stability matters, 7–8 phr with a functional filler is typical.

Question 3

Is MEKO released by SCOX-200 considered hazardous, and what precautions are required?

Accepted Answer

MEKO is classified as a suspected carcinogen (IARC Group 2B) and is subject to occupational exposure limits in most jurisdictions (e.g., 10 ppm TWA in the EU). Adequate ventilation or local exhaust extraction is required during compounding and application. SCOX-200 is compliant with REACH, and the MEKO emission rate during cure is well below regulatory thresholds in typical construction or industrial application scenarios.

Flash Point	55°C
Active Content	95%
Density (25°C)	0.97 g/ml
Viscosity (25°C)	5–10 mPa·s
Recommended Dosage	5–8 phr

Oxime Silicone Crosslinker SCOX-200

Specifications

FAQ

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