Energy savings plus mechanical reinforcement and rheology control

Waterborne Polyurethane Contact Adhesive (A)

Adhesives Formulation

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Polyurethane Dispersions (PUDs)

Applicable Industrial Sectors

Automotive , Buildings & constructions

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

Polyurethane dispersion (NeoRez R-550, DSM)

Polyurethane dispersion (NeoRez R-551, DSM)

Acrylic latex (NeoCryl A-544, DSM)

Tackifier (Tacolyn 3166, Hercules)

Natural Rubber latex (high pH)

(Source: Moss, M., “Polyurethane Dispersions for Adhesive Applications”, Pigment and Resin Technology, Vol. 26, No. 5, 1997, pp. 296-299)

Typical Properties

Properties

Shear strength, MPa

BW / Steel

xxx

BW / ABS

xxx

Heat resistance, creep mm/min/1kg at 80° C

xxxx

Heat resistance, creep mm/min/1kg at 100°C

xxxx

Processing

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. Both are available in solvent borne and waterborne forms.

Tips and Tricks

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