Secondary coating Rubber to Metal Adhesive BA-221
(Equivalent to Chemlok 252x/6253/6100/6016/6108)
1. Description
BA-221 is a heat vulcanization bonding agent for rubber and various
metals.
2. Typical Properties:
- Component: Higher polymer, organic compound, inorganic filler and
organic solvent.
- Color: Black
- Viscosity: (25℃, Brookfield LV2 30rpm) 200-350cps
- Solid Content: 27℃
- Diluents: Xylene
- Solvent: Xylene
- Shelf Life: 12 months in unopened container (25℃)
3. Features And Benefits
It is a high strength bonding agent for unvulcanized rubber and
metals coated with BA-213.
The applicable rubbers include NR, CR, BR, SBR, PIPR, IIR, EPR,
EPDM.
It is non-toxic, easily operated.
It can be applied with different ways like dip coating, spraying,
brushing, and roller coating.
It has excellent resistance to heating, water, solvent, oil, salt,
corrosion etc.
It has high bonding strength, stability and long durability.
4. Application And Handling
Surface Preparation: All bonding surface must be contaminant (such
as oil, rust, oxide etc) free to reach optimum bonding Surfaces
should be grit-blasted, and then ideally degreased.Apply BA-213 and
wait it becomes dry.
Mixing: Homogeneous mix must be ensured before applying bonding
agent.
Dilution: Proper quantity dilutes can also be added according to
dosage. The diluted bonding agent cannot be stored for long time.
Brushing: Unnecessary for dilution
Roller coating: 100 portion of BA-221with 10-15 portion diluents
Dipping coating: 100 portion of BA-221with 10-15 portion diluents
Spraying: 100 portion of BA-221with 50 portion diluents
Coating thickness: The coating should be uniform. Drying coating
thickness is 15-25 microns.
Drying: After applying BA-221, it should be left for 45-60minutes
to dry at room temperature. Pre-warming or heating will speed up
drying.
Storage: It should be stored in dry environment at room
temperature. Avoid long time exposure in high humidity and
temperature environment.
After treatment: Before heating vulcanization, use cloth strip
soaked with xylene to clean the excessivebonding agent. Once cured,
dilutes cannot clean the bonding agent.
Vulcanization: For optimum adhesion effects, rubber and bonding
agentshould be vulcanized at the same time. When the coated parts
are placed in the mould, fill rubber inside and then close the
mould to start vulcanization immediately. Recommended vulcanization
temperature is 145-185℃. Recommended vulcanization time is
5-60minutes. Vulcanization pressure is according to practical
situation.
5. Cautionary Information
Close the diluents container tightly after use.
The diluents vapor is hazardous. Prevent long time inhalation or
skin contact in working place.
