US 12,637,597 B2Granted

Advanced bonding agent

AssigneeDdp Specialty Electronic Materials US, LLC

InventorsStefan Dehnicke, Kai Ziegler, Philipp Zutavern, Anna Osichow, Gerd Becker

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The invention provides a bonding agent particularly suited for bonding metal to castable polyurethane, polyesters and or polyamides.

Dependent claims

A bonding agent for bonding castable polyurethane and/or polyamides comprising:

(1) a phenolic resol resin having the following characteristics:
viscosity at 20° C. of 4000±500 mPa·s;
non-volatile components at 135° C. of 79±2%;
content of free formaldehyde of maximum 5%;
and specific gravity at 20° C. of 1.26 g/cm3;
(2) polyvinylbutyral (PVB);
and
(3) a solvent or solvent mixture that is capable of solvating ingredients (1) and (2), while being sufficiently volatile to be removed at atmospheric pressure.

5 more elements

Dependencies are inferred from the claim text.

B32B 27/36
Layered products comprising a layer of synthetic resin: comprising polyesters
C09J 161/06
Condensation polymers of aldehydes or ketones with phenols only: of aldehydes with phenols
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 15/08
Comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin

From the US filing history. Foreign family members aren’t listed.

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