CILBOND® 89ET

• Cilbond 89ET will give extremely good rubber tearing bonds when moulded by either conventional or post-vulcanisation bonding techniques, and also offers good environmental resistance.
• Bonds are resistant to temperatures between -40°C to +180°C.
• Cilbond 89ET is excellent for low-temperature post-vulcanisation bonding, provided the coated surface can be heated to at least 60°C (ideally 70ºC).
• Applications include the moulding of castable PU onto cured rubbers, as typified by on-site bonding where the application of heat is limited (such as conveyor belt repairs and rubber roller recovery using castable PU).
• The adhesion of Cilbond 89ET to fibres, yarns and textiles made from rayon, aramid, nylon and polyester is excellent and the flexibility of cured Cilbond 89ET makes it ideal for speciality applications for rubber products reinforced with cord, fibre or fabric (such as hoses, timing belts and conveyor belts).
• For rubber to metal bonding, a primer coat on the metal of Cilbond 12E is recommended for applications where superior environmental resistance is required.
• Cilbond 12E is also recommended for the bonding of engineering plastics such as PPS, PEEK, PES, Nylon, PET, PBT, etc.

The low-temperature curing properties of Cilbond 89ET make it suitable for :

• Tank Lining.
• Rollers and Wheels.
• Belting.
• Seals.
• Automotive Components.
• PU to Rubber combinations.
• Other Rubber to Metal bonded components, particularly low-temperature bonding applications and Post-Vulcanisation Bonding (see Cilbond Information Sheet C20).

• Metal Surface Preparation: For optimum bonding the substrate surface must be contaminant free. With ferrous metals, grit-blasting with clean, sharp chilled iron grit (200–400μ) and for non-ferrous metals with clean, sharp aluminium oxide grit, to a grey-white finish should yield excellent bonding surfaces.
• Agitation: Cilbond 89ET must be thoroughly stirred before use, preferably with a propeller type agitator.
• Brushing: Cilbond 89ET can be brush applied without the need for dilution. If dilution is required (if covering large areas) use Xylene or Toluene.
• Spraying: To apply by spray, dilute with Toluene or Xylene to a viscosity of 23 - 26 seconds (Zahn No. 2 cup at 25°C) or 16 - 20 seconds on a DIN 4 / Ford 4 / Frikmar Cup at 25°C.
• If cob-webbing (fibrillation) occurs on spraying, replace the Toluene with Xylene. A nozzle size of 1.0 - 1.5mm is recommended, with an air pressure of 1.5 bar. Note : Excessive pressure can lead to cob-webbing. Cilbond 89ET contains an isocyanate prepolymer of very low volatility. This is reactive towards water and so extra care must be taken when spraying.
• Dipping: For Dipping, dilute with Toluene or Xylene to a viscosity of 23 - 26 seconds (Zahn No 2 cup at 25°C) or 16 - 20 seconds on a DIN 4 / Ford 4 / Frikmar Cup at 25°C.
• Dilution: CIL recommends Xylene or Toluene to dilute Cilbond 89ET.
• Coating Thickness: As a One-Component bonding system apply at a dry film thickness of 15 – 30 microns. As a Cover-Coat bonding system apply at a dry film thickness of 10 – 25 microns.
• Pre-baking: Pre-baking Cilbond 89ET is not normally recommended, but short pre-bakes of up to 10 minutes at ca. 155ºC can be tolerated, if necessary.
• Drying: Allow 20 - 30 minutes drying time at room temperature. Pre-warming parts to ~60ºC prior to coating will reduce the drying time.
• Moulding: Cilbond 89ET can be processed by all conventional moulding techniques and it exhibits good bonding within the temperature range of 70ºC – 180ºC.

Cilbond 89ET is available in 10L and 25L tight head drums. Keep containers well sealed when not in use. Avoid contact with water.

• Cilbond 89ET will give extremely good rubber tearing bonds when molded by either conventional or post-vulcanisation bonding techniques, and also offers good environmental resistance.
• Bonds are resistant to temperatures between -40°C to +180°C.
• Cilbond 89ET is excellent for low-temperature post-vulcanisation bonding, provided the coated surface can be heated to at least 60°C (ideally 70ºC).
• Applications include the molding of castable PU onto cured rubbers, as typified by on-site bonding where the application of heat is limited (such as conveyor belt repairs and rubber roller recovery using castable PU).
• The adhesion of Cilbond 89ET to fibers, yarns and textiles made from rayon, aramid, nylon and polyester is excellent and the flexibility of cured Cilbond 89ET makes it ideal for speciality applications for rubber products reinforced with cord, fiber or fabric (such as hoses, timing belts and conveyor belts).
• For rubber to metal bonding, a primer coat on the metal of Cilbond 12E is recommended for applications where superior environmental resistance is required.
• Cilbond 12E is also recommended for the bonding of engineering plastics such as PPS, PEEK, PES, Nylon, PET, PBT, etc.