Quick Search
CHEMOSIL 222 is a versatile, heat activated bonding agent which will bond a variety of rubber compounds to metal and plastic substrates.
In some circumstances CHEMOSIL 222 may be used as a single coat.
For general use CHEMOSIL 222 should be used in combination with an appropriate metal primer such as CHEMOSIL 211.
When used with CHEMOSIL 222 the in service environmental resistance of the final bond will be very much improved.
CHEMOSIL 222 bonds elastomer compounds based on natural rubber (NR), butadiene (BR), isoprene (IR), styrene butadiene (SBR), butyl (IIR), nitrile (NBR) and chloroprene (CR) rubber to most metals, alloys and polar polymeric substrates.
Bonding occurs during the vulcanisation of the rubber.
CHEMOSIL 222 is typical cure temperature ranges for moulding processes are 130-180°C.
CHEMOSIL 222 is lower temperatures of around 100°C with extended cure times of many hours may also be used for tank lining applications.
CHEMOSIL 222 does not contain lead and completely replaces CHEMOSIL 220.
Processing of CHEMOSIL 222:
A properly prepared substrate surface is essential to achieve consistent elastomer bond performance.
All oil, grease and other soluble contamination should be removed by solvent degreasing or alkaline cleaning.
Rust, scale and other non soluble contaminants should be removed by mechanical or chemical methods.
Grit blasting is the most commonly used mechanical method.
A second degreasing stage after the mechanical treatment is strongly recommended to remove residual grease, oil and abraded dusts.
Chemical treatments for ferrous substrates usually involve the use of phosphating agents.
Full details of the special chemical treatments required for non ferrous and plastic substrates are given in the information sheet, “Preparation Of Substrates For CHEMOSIL Bonding”.
CHEMOSIL 222 contains dispersed solids and must be thoroughly stirred before and at frequent intervals during use.
CHEMOSIL 222 can be applied undiluted by brush or roller coating or when diluted by spray or dip techniques.
For a recommended dry film thickness of 10-15 microns the following dilution is recommended:
Brushing/rolling: undiluted
Dipping : up to 10 % xylene or toluene
Spraying: 40 - 60 % xylene or toluene (4 mm cup 18-20 sec., air pressure 3-4 bar, nozzle Ø 1-2 mm, distance ~ 40 cm)
Dilution will accelerate settling, maintain sufficient agitation to ensure product uniformity.
A thin uniform coating gives best results.
Avoid applying thick coats which can give poor drying and may lead to film displacement during moulding.
At ambient temperature allow 30 minutes drying time after coating.
Elevated temperatures in hot air ovens or drying tunnels will reduce the drying time required.
CHEMOSIL 222 will dry to a hard, non tacky film.
Coated components can be stacked or loaded into bins for transport and storage.
Clean cotton gloves should be worn when handling coated components.
Coated components can be stored for up to 3 months before bonding without adversely affecting the bond performance.
Coated components should be protected from dust, moisture and other contamination during storage.
Shelf Life of CHEMOSIL 222:
At least 24 month in closed containers below 25°C
Specifications of CHEMOSIL 222:
Solids content: 24.0 - 28.0 weight %
Viscosity at manufacturing : 120 - 250 mPas
Density: 0.95 - 1.01 g/ml
Properties of CHEMOSIL 222:
Appearance: black liquid
Composition of CHEMOSIL 222:
Polymers and heat reactive components in an organic solvent system.
Other CHEMOSIL Products:
CHEMOSIL 211
CHEMOSIL 211-52
CHEMOSIL NL 222
CHEMOSIL 225
CHEMOSIL 231-G
CHEMOSIL 310
CHEMOSIL 342
CHEMOSIL 350
CHEMOSIL 360
CHEMOSIL NL 411
CHEMOSIL 425-77
CHEMOSIL 511
CHEMOSIL 512
CHEMOSIL X 1960-22
CHEMOSIL X 5960-22
CHEMOSIL X5130-22
CHEMOSIL 425
CHEMOSIL X 6025
CHEMOSIL 597
