A PU2K structural adhesive composition comprising an NCO component and a hardener component. The NCO component and hardener component each comprise from 0.1% to 40% by weight of a thixotropic composition (A) comprising a bis-urea obtained by reaction of a primary aliphatic amine with a diisocyanate, in suspension in a continuous phase consisting of a plasticizer chosen from an alkyl phthalate and pentaerythritol tetravalerate; and at least one component, among the NCO component and hardener component, comprises from 5% to 40% by weight of alumina. The structural adhesive is used in the field of construction, the manufacture of transportation means, preferably of the motor vehicle, rail and aerospace industries, and shipbuilding.

The present invention relates to a process for cold bonding elastomeric rubber substrates to non-elastomeric substrates of a different material, preferably metal, by use of a rubber treatment, preferably a primer composition and a 2k adhesive, preferably a 2k epoxy adhesive as well as the thus obtained bonded substrates.

The present invention relates to a process for cold bonding elastomeric rubber substrates to non-elastomeric substrates of a different material, preferably metal, by use of a rubber treatment, preferably a primer composition and a 2k adhesive, preferably a 2k epoxy adhesive as well as the thus obtained bonded substrates.

A novel primer composition contains aldimine and/or epoxy resins, a process of making such primer to be used in glass bonding adhesive kit.

A novel primer composition contains aldimine and/or epoxy resins, a process of making such primer to be used in glass bonding adhesive kit.

The invention relates to a multilayer composite, containing a first polymeric layer which on a side is coated with a printing ink containing a polyurethane as binder, and a second layer which with a polyurethane dispersion as adhesive is joined at least partly with the side of the first polymeric layer which is coated with the printing ink containing a polyurethane as binder.

The present invention provides a system comprising an allophanate composition comprising a neutralized polyol, a polyuretdione resin, a tertiary amine catalyst, an additive package, and a reducer and a neutralized basecoat comprising an acid scavenger and a pigment. The resulting allophanate system may be used to make coatings, adhesives, castings, composites, and sealants in which clear-coating on neutralized pigmented basecoats is much improved in comparison to non-neutralized basecoats.

The present invention provides a system comprising an allophanate composition comprising a neutralized polyol, a polyuretdione resin, a tertiary amine catalyst, an additive package, and a reducer and a neutralized basecoat comprising an acid scavenger and a pigment. The resulting allophanate system may be used to make coatings, adhesives, castings, composites, and sealants in which clear-coating on neutralized pigmented basecoats is much improved in comparison to non-neutralized basecoats.

The present invention provides a reaction mixture comprising a polyuretdione resin, a neutralized polyol, an acid-blocked tertiary amine catalyst, and optionally, an additive package selected from the group consisting of flow control additives, and wetting agents, and solvents, wherein the acid has a pK.sub.a of greater than 4.82. Compositions made from the reaction mixture of the present invention may be catalyzed at temperatures from room temperature to 130 C. and are particularly applicable in or as coatings, adhesives, castings, composites, and sealants with good performance and extended pot-life.

The present invention provides a system comprising an allophanate composition comprising a neutralized polyol, a polyuretdione resin, a tertiary amine catalyst, an additive package, and a reducer; and a neutralized basecoat comprising an inorganic salt and a pigment. The present invention further provides a method of making an allophanate system comprising combining a neutralized polyol with a polyuretdione resin in the presence of a tertiary amine catalyst, an additive package, and a reducer to produce an allophanate composition, and contacting the allophanate composition with a neutralized basecoat comprising an inorganic salt and a pigment. The system may be used to make coatings, adhesives, castings, composites, and sealants in which clear-coating on neutralized pigmented basecoats is much improved in comparison to coating on non-neutralized basecoats.