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Glossary

        Tradebond WA21

Description

Tradebond WA21 is a medium viscosity homopolymer emulsion of vinyl acetate.  The emulsion is stabilised with polyvinyl alcohol and self-crosslinks with the evaporation of water.

Fully compounded, ready to use, self-crosslinking, water resistant wood adhesive which meets the requirements of British Standards BS EN 204 D3.

The emulsion has good wet tack, reasonable open time and is mechanically stable.

The emulsion is stable for extended periods of time, although there may be an increase in viscosity at low shear with time.

 

Technical Data

Base 

Vinyl acetate homopolymer

Total Solids 

48.5 1.5%

pH 

2 - 4

pH stability 

Keep below pH 4 for effective crosslinking.

Particle size range 

0.5 3.0 μ approx.

Free monomer content 

< 0.2%

Specific gravity @ 25C

1.07 

Freeze-thaw stability 

Good

Borax compatibility 

Unstable

Minimum film forming temp 

2 5C

Viscosity @ 25C

100 - 200 poise

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