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The material selection platform
Adhesives Ingredients
The material selection platform
Adhesives Ingredients

Polyurethane Contact Adhesive

Adhesives Formulation

Applicable Type
Applicable Base Polymer

Applicable Base Polymer Properties

Polyurethane adhesives are often chosen over polychloroprene adhesives when greater resistance to plasticizer migration is required or difficult to bond polymeric substrates are involved. One of the largest applications is in footwear where high bond strengths to PVC compositions are required. Polyurethane adhesives also give the formulator more freedom in “engineering” the modulus and elongation required of the adhesive film to meet specific applications.

Typical Formulation Ingredients

Ingredient
Parts by weight
Polyol (TONE, Dow Chemical) 
xxxx 
Toluene diisocyanate 
xxxx 
1,4-Butanediol 
xxxx 
Methyl ethyl ketone 
xxxxxxxxxxxxx 

Typical Properties

Properties
Peel Strength (open time – 10 mins) 
xxxxx 
Canvas to canvas 
xxxxx 
Vinyl to vinyl 
xxxxxxxxxxxxxxxxx 
Polyester to polyester 
xxxxx 

Processing

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Resulting Properties

Contact adhesives are widely used because of their easy application, fast setting properties, and excellent adhesion to many different substrates. The contact adhesive is coated on both surfaces to be joined. After the carrier evaporates, the two surfaces are brought together under slight pressure, and the adhesive bonds to itself. Polyurethane contact adhesives can be applied similar to polychloroprene contact adhesives. A typical formulation for a solvent borne polyurethane contact adhesive is provided in the above table.

Tips and Tricks

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