Energy savings plus mechanical reinforcement and rheology control

Expandable, Non-Sagging, Polyurethane Composition

Adhesives Formulation

Applicable Type

Reactive Adhesives , Polyurethane Adhesives

Applicable Base Polymer

Polyurethanes

Applicable Industrial Sectors

Automotive , Buildings & constructions

Applicable Base Polymer Properties

Polyurethanes are extensively and successfully used as adhesives and sealants, and they have an excellent record of durability. Polyurethane-based adhesives form tough bonds with high peel strength. They have better low temperature strength than other adhesives. They have exceptionally high strength at cryogenic temperatures. They have good chemical resistance, although not generally as good as epoxies or acrylics. Urethanes do not have high temperature resistance. Maximum upper use limits are about 150°C, and most formulations are used below 100°C.

Typical Formulation Ingredients

Ingredient

Parts by weight

Component A (Polyol Component):

Poly (propylene oxide) triol EO-tipped (eqw. 500)

xxxx

Poly (propylene oxide) triol EO-tipped (eqw. 152)

xxxx

1,4 butanediol

xxxx

Isophorone diamine (PDA)

xxx

Water

xxxx

Diethylene triamine

xxxx

Component B (Isocyanate Component):

Mondur MRS-4

xxxx

Poly (propylene oxide) triol EO-tipped (eqw. 500)

xxxx

Typical Properties

Properties

NCO content of isocyanate component, %

Isocyanate / polyol ratio

xxxx

Processing

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Resulting Properties

The formulation above is for a two component polyurethane adhesive that expands on cure. This is accomplished by virtue of the water that is added to the polyol component. This two part liquid, expanding rigid urethane foam is a closed cell, pourable foam, which will resist the absorption of water. The lightweight foam is commonly used for filling voids, filling under decks and practically any other flotation or insulation application. Higher densities are used for architectural castings, support applications, etc.

Tips and Tricks

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