Energy savings plus mechanical reinforcement and rheology control

Crosslinkable Waterborne SBR Adhesive for Porous Substrates

Adhesives Formulation | Supplied by Huntsman

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Styrene Butadiene Rubbers, SBR

Applicable Industrial Sectors

Buildings & constructions

Applicable Base Polymer Properties

Latex (emulsion) SBR is extensively used in coated papers, being one of the most cost-effective resins to bind pigmented coatings. It is also used in building applications, as a sealing and bonding agent.

In this application SBR is used as an alternative to PVAc. It is more expensive but offers:

Better durability
Reduced shrinkage
Increased flexibility
As well as being resistant to emulsification in damp conditions

The formulation above provides for crosslinking via isocyanate addition.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Styrene butadiene latex, 50% solids, 6.0 pH, anionic surfactant

xxxx

Calcium carbonate (OmyaCarb 5, Omya)

xxxx

Polyvinyl alcohol (10% Selvol 523, Sekisui Chemical)

xxxx

Biocide (Rocima BT NV2, Rohm & Haas)

xxx

Dispersant (Dynol 604, Air Products)

xxx

Water

xxx

MDI Isocyanate (Suprasec 9600 or Rubinate 9236, Huntsman)

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Typical Properties

Properties

Viscosity, cps, after 10 min

xxxx

Viscosity, cps, after 20 min

xxxx

Lap shear strength build up on wood, psi, after 100 min

xxx

Lap shear strength build up on wood, psi, after 500 min

xxx

Processing

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Resulting Properties

The adhesive formulation offers low raw materials cost and high bond strength. It may be used for wet lay-up laminations for a variety of materials when one of the substrates is porous to allow moisture to escape.

The formulation also has:

Good adhesion for bonding wood to phenolic papers, plastics, metals, wood, and concrete.
High performance wet-use for wood bonding edge-to-edge, finger joints, and laminating.

(Source: Huntsman)

Tips and Tricks

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