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Butadiene polymer modified silane coupling agent

X-12-1267B/X-12-1267B-ES/X-12-1287A

X-12-1267B has a polybutadiene back-bone and an alkoxysilyl group. Due to the polybutadiene polymer chain, the silane has high compatibility with aliphatic hydrocarbon polymers. X-12-1287A has a polybutadiene backbone with a reactive trimethoxy group and acid anhydride linked to organic materials which have NH or OH groups.

Features

  • Non volatile owing to heating
  • Ethoxy group is available (X-12-1267B)
  • Improves compatibility and adhesion of various materials

Applications

  • Improved processing of BR and SBR
  • Improves water resistance
  • Improves adhesion

Structure

Structure

General Properties

Parameter Product name X-12-1267B X-12-1267B-ES X-12-1287A

R =

 Me Et Me

Appearance

 Slightly cloudy yellow liquid Slightly cloudy yellow liquid Cloudy brown liquid

Viscosity at 25℃

mPa·s		 1,600 1,100 6,400

Nonvolatile content  105°C × 3 h

%		 > 98.0 > 98.0 > 98.0

Avarage molecular mass*

 6,000 6,200 6,500

Acid anhydride equivalent

g/mol		 - - 1,500
(Not specified values)

*Calculated by styrene conversion

Application: Adhesion Improvement of Silicone Sealing Materials

Parameter Product name Blank*1 X-12-1267B
Addition of 0.5 wt%

Substrate

 Initial After water immersion*2 Initial After water immersion*2

Butyl rubber

 ‒ + + +

Polystyrene

 ‒ ‒ + +
(Not specified values)

-: Interfacial delamination　+: Cohesive failure
*1 KBM-603
*2 Water immersion: 50°C × 7 days

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