Name: ZEMSIL SL-AC
Brand: ZEMSIL

Question 1

What is ZEMSIL SL-AC?

Accepted Answer

ZEMSIL SL-AC (Acidic Colloidal Silica Dispersion, CAS 7631-86-9) is a ZEMSIL® silicone material. ZEMSIL SL-AC is an acidic colloidal silica dispersion containing 20% SiO₂ stabilized at pH 2–4, with an ultra-low sodium content below 0.05% Na₂O. The fine 5–15 nm particles and acid-stable formulation make it uniquely suited for integration into acid-catalyzed coating systems and precision casting formulations where sodium contamination or pH incompatibility would disqualify alkaline grades. It provides excellent film-forming properties and reinforcement at low addition levels.

Question 2

What is ZEMSIL SL-AC equivalent to?

Accepted Answer

ZEMSIL SL-AC is equivalent to Nalco 1034A, Ludox CL and can be used as a direct drop-in replacement in most formulations.

Question 3

What are the main applications of ZEMSIL SL-AC?

Accepted Answer

ZEMSIL SL-AC is used in: Precision casting binder for acid-stable ceramic shell systems, Acid-stable functional coating for glass, metal, and plastic substrates, Textile anti-slip finishing and fiber surface treatment, Anti-corrosion primer additive for metal coatings.

Question 4

What are the key specifications of ZEMSIL SL-AC?

Accepted Answer

SiO₂ Content: 20 ± 1 %; Particle Size (DLS): 5–15 nm; pH: 2.0–4.0; Na₂O Content: ≤0.05 %; Viscosity @ 25°C: ≤5 mPa·s; Specific Gravity @ 25°C: 1.12–1.14

Question 5

What is the CAS number of ZEMSIL SL-AC?

Accepted Answer

The CAS number of ZEMSIL SL-AC (Acidic Colloidal Silica Dispersion) is 7631-86-9.

ZEMSIL SL-AC

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항목	값	단위	시험 방법
SiO₂ Content	20 ± 1	%	—
Particle Size (DLS)	5–15	nm	—
pH	2.0–4.0	—	—
Na₂O Content	≤0.05	%	—
Viscosity @ 25°C	≤5	mPa·s	—
Specific Gravity @ 25°C	1.12–1.14	—	—