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Adhesives Ingredients
The material selection platform
Adhesives Ingredients

Soybean Hot or Cold Press Plywood Glue

Adhesives Formulation

Applicable Base Polymer Properties

Soybean flour is formulated into adhesive systems as either the main polymeric component, incorporated as extenders for other resins. Their primary application is in the manufacture of plywood, softboard laminating, paper overlaying, and other less stringent applications. These adhesives are inexpensive and can be used for making semi-water resistant plywood and for coating some types of paper.

Typical Formulation Ingredients

Ingredient
Parts by weight
Soybean flour 
xxx 
Water at 15-22°C 
xx 
Pine oil or equivalent defoamer Mix 3 min or until smooth 
x 
Water at 15-22°CMix 2 min or until smooth 
xxx 
Hydrated lime 
xx 
Water at 15-22°CMix 1 min 
xx 
50% sodium hydroxide solution Mix 1 min 
xx 
Sodium silicate Mix 1 min 
xx 
Carbon disulfide (mixed in carbon tetrachloride) 
xxxx 
Carbon tetrachloride (mixed in carbon disulfide) 
xxx 
Flake pentachlorophenolMix 10 mins 
xxxx 

Processing

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Resulting Properties

Soybean glues generally are considered to have limited water resistance but recover their strength on drying. Soybean glues are susceptible to mold growth. However, a variety of efficient preservatives are available. A typical soybean flour composition is listed above for the hot or cold pressing of plywood.

Tips and Tricks

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