To provide an adhesive composition capable of firmly bonding polymer sheets together, comprising: (I) 100 parts by mass of an end-unreactive urethane urea resin; and (III) 4.0 to 20 parts by mass of a polyisocyanate compound having at least two isocyanate groups in the molecule, wherein the polyisocyanate compound (III) contains (IIIA) a polyisocyanate compound having an isocyanate group bonded to secondary carbon and (IIIB) a polyisocyanate compound having 4 to 30 carbon atoms in the molecule other than the component (IIIA), and the amount of the component (IIIB) is 10 to 500 parts by mass based on 100 parts by mass of the component (IIIA).

Provided is an adhesive that effectively utilizes bark and demonstrates superior adhesion performance. The adhesive of the present invention comprises at least one adhesive resin (A) selected from the group consisting of phenolic resin, urea resin, and melamine resin, and finely pulverized bark (B) comprising cellulose nanofibers.

Provided is an adhesive that effectively utilizes bark and demonstrates superior adhesion performance. The adhesive of the present invention comprises at least one adhesive resin (A) selected from the group consisting of phenolic resin, urea resin, and melamine resin, and finely pulverized bark (B) comprising cellulose nanofibers.

The present invention relates to a process for modifying the surface polarity of elastomeric rubber substrates to facilitate their cold bonding to other rubber substrates or non-elastomeric substrates of a different material, preferably metal, by chlorinating the elastomeric rubber substrate surface by treatment with a chloride-containing composition and a peroxymonosulfate-containing composition. Further aspects relate to the thus-obtained surface-modified rubber substrates, processes of bonding them to other substrates by use of an adhesive, as well as the thus-obtained bonded substrates.

The present invention relates to a process for modifying the surface polarity of elastomeric rubber substrates to facilitate their cold bonding to other rubber substrates or non-elastomeric substrates of a different material, preferably metal, by chlorinating the elastomeric rubber substrate surface by treatment with a chloride-containing composition and a peroxymonosulfate-containing composition. Further aspects relate to the thus-obtained surface-modified rubber substrates, processes of bonding them to other substrates by use of an adhesive, as well as the thus-obtained bonded substrates.

Disclosed is a method for improving interfacial adhesion of an adhesive to unprimed substrates and an improved adhesive composition, involving admixing an adhesive with an adhesive modifier, where the modifier is at least partially soluble in the at least one adhesive and includes either a non-aromatic polyol or a molecule having at least one ortho-hydroxyl substitution on a benzene ring.

Disclosed is a method for improving interfacial adhesion of an adhesive to unprimed substrates and an improved adhesive composition, involving admixing an adhesive with an adhesive modifier, where the modifier is at least partially soluble in the at least one adhesive and includes either a non-aromatic polyol or a molecule having at least one ortho-hydroxyl substitution on a benzene ring.

Provided is an adhesive comprising a reaction product of (A) an aliphatic polyisocyanate having a molecular weight of from 132 to 700; and (B) a polyaspartate comprising a reaction product of (B1) a polyamine having a molecular weight of at least 240, and (B2) a Michael addition receptor, wherein viscosity @ 23° C. according to ASTM D1084-16, remains below 150 cps after four hours, and wherein the adhesive develops an acceptable bond strength to a substrate, defined as having a minimum of 150 g/in. measured @ 23° C. according to ASTM D 1876-01 or substrate tear, in less than five days after the substrate is laminated with the adhesive. The inventive flexible packaging adhesives are free of aromatic amines and may find use in multilayer laminates for a variety of industries, including the food processing, cosmetics, and detergents industries.

Provided is an adhesive comprising a reaction product of (A) an aliphatic polyisocyanate having a molecular weight of from 132 to 700; and (B) a polyaspartate comprising a reaction product of (B1) a polyamine having a molecular weight of at least 240, and (B2) a Michael addition receptor, wherein viscosity @ 23° C. according to ASTM D1084-16, remains below 150 cps after four hours, and wherein the adhesive develops an acceptable bond strength to a substrate, defined as having a minimum of 150 g/in. measured @ 23° C. according to ASTM D 1876-01 or substrate tear, in less than five days after the substrate is laminated with the adhesive. The inventive flexible packaging adhesives are free of aromatic amines and may find use in multilayer laminates for a variety of industries, including the food processing, cosmetics, and detergents industries.

Imine, obtainable by reaction of (i) an amino-functionalised polyoxyalkylene, the polyoxyalkylene chains of which are a copolymer of oxyethylene and oxypropylene units, those polyoxyalkylene chains carrying primary amino groups (preferably two terminal primary amino groups per molecule), and (ii) a ketone and/or aldehyde having a hydrogen atom at the carbon atom in the alpha-position to the carbonyl carbon; and various subjects of the invention based thereon, especially in coating systems or adhesive systems.