Dow Global Technolgoies LLC

Ddp Specialty Electronic Materials Us, LLC

Joel Kunz

Stefan Schmatloch

Sergio Grunder

Felix Koch

Grunder Sergio

A polyurethane adhesive composition, more specifically a two-component polyurethane adhesive, including (a) at least one isocyanate component, and (b) at least one polyol component, wherein the polyol component (b) includes (bi) at least one first polyol compound, (bii) at least one second polyol compound and (biii) at least one chain extender, and a process for making the above adhesive composition.

Adhesive composition

Two-component polyurethane adhesives include a polyol component and a polyisocyanate component. The polyol component includes a high functionality polyether polyol and precipitated calcium carbonate particles having a particle size of up to 200 nm. The adhesive has an excellent combination of a prolonged open time followed by curing to form a strong adhesive bond.

Latent two-part polyurethane adhesives

Disclosed are latent two-part polyurethane adhesives that rapidly develop adhesive strength when cured by application of infrared radiation containing a polyol component which includes; one or more polyols having a hydroxyl equivalent weight of 400 to 2000 and a nominal hydroxyl functionality of 2 to 4; one or more aliphatic diol chain extenders; and one or more latent room temperature organometallic catalysts; b) a polyisocyanate component containing one or more polyisocyanate compounds; and v) a carboxylic acid-blocked cyclic amidine compound and vi) a phenol-blocked cyclic amidine compound which each may be located in the polyol component or the isocyanate component. Further disclosed are methods of bonding structures together using the latent two-part polyurethane adhesives.

Latent two-part polyurethane adhesives curable with infrared radiation

Two-component polyurethane adhesives include a polyol component and a polyisocyanate component. The polyol component includes a polyether polyol and an aliphatic diol chain extender, but is devoid of primary and second amine compounds. The polyisocyanate component includes one or more polyisocyanate compounds. The adhesive contains a mixture of a dialkyltinthioglycolate catalyst and an acid-blocked cyclic amidine catalyst. The tin catalyst is formulated into the polyol component, whereas the cyclic amidine catalyst can be formulated into either the polyol or the polyisocyanate components.

Latent two-part polyurethane adhesives cured with infrared radiation

Disclosed are latent two-part polyurethane adhesives that rapidly develop adhesive strength when cured by application of infrared radiation containing a polyol component which includes; one or more polyols having a hydroxyl equivalent weight of 400 to 2000 and a nominal hydroxyl functionality of 2 to 3; one or more aliphatic diol chain extenders; one or more latent room temperature organometallic catalysts; and one or more multifunctional polyols having a functionality of greater than 3; b) a polyisocyanate component containing one or more polyisocyanate compounds; and v) a carboxylic acid-blocked cyclic amidine compound, vi) a phenol-blocked cyclic amidine compound or both of v) one or more carboxylic acid-blocked cyclic amidine compounds and vi) one or more phenol-blocked cyclic amidine compounds which may be located in the polyol component or the isocyanate component. Further disclosed are methods of bonding structures together using the latent two-part polyurethane adhesives.

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Horgen, Switzerland

Joel Kunz