Rubber Chemicals

Silane Coupling Agent (Si-69)

Si-69 (TESPT) couples silica filler into rubber compounds, supporting reinforcement, anti-reversion and fatigue resistance.

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Sulphur-silane coupling agent

A bifunctional organosilane used with silica in tyre, tread, technical moulding and cable compounds. Typical usage: 2–5 phr.

HSN code: 2931 90 00

Key features

  • Sulphur 21.7–23.3%
  • SG 1.060–1.100
  • CAS 40372-72-3
  • Dosage 2–5 phr

Typical applications

  • Silica-filled rubber
  • Tyre and tread compounds
  • Technical mouldings
  • Cable compounds

Available grade

Coupling agent

Si-69 (TESPT)

Sulphur
21.7–23.3%
Appearance
Yellow liquid
Specific gravity
1.060–1.100
Packing
25 / 200 kg drums
CAS
40372-72-3
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