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 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.

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 method for reversibly bonding a first and a second substrate, wherein at least the first substrate is an electrically non-conductive substrate, the method comprising: coating the surface of the electrically non-conductive substrate(s) with a conductive ink; applying an electrically debondable hot melt adhesive composition to the conductive ink-coated surface of the first substrate and/or the second substrate; contacting the first and the second substrates such that the electrically debondable hot melt adhesive composition is interposed between the two substrates; allowing formation of an adhesive bond between the two substrates to provide bonded substrates; and optionally applying a voltage to the bonded substrates whereby adhesion at least one interface between the electrically debondable hot melt adhesive composition and a substrate surface is substantially weakened. Furthermore, the present invention relates to the bonded substrates thus obtained.

The present invention relates to a method for reversibly bonding a first and a second substrate, wherein at least the first substrate is an electrically non-conductive substrate, the method comprising: coating the surface of the electrically non-conductive substrate(s) with a conductive ink; applying an electrically debondable hot melt adhesive composition to the conductive ink-coated surface of the first substrate and/or the second substrate; contacting the first and the second substrates such that the electrically debondable hot melt adhesive composition is interposed between the two substrates; allowing formation of an adhesive bond between the two substrates to provide bonded substrates; and optionally applying a voltage to the bonded substrates whereby adhesion at least one interface between the electrically debondable hot melt adhesive composition and a substrate surface is substantially weakened. Furthermore, the present invention relates to the bonded substrates thus obtained.

An adhesive composition includes a polyurethane polymer, a solvent and a co-solvent. The polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having a mass average molecular weight Mw, as determined by gel permeation chromatography against polystyrene standards using N,N-dimethyl acetamide as the eluent, of 50000 g/mol, the solvent is a polar-aprotic solvent such as MEK and the co-solvent is water. The polyurethane polymer, the solvent and the co-solvent are present in such amounts that they form a dispersion. The polyurethane polymer content is 10 weight-%, based on the total weight of the composition and the weight ratio of solvent to co-solvent is in a range of 1:1 to 4:1.

An adhesive composition includes a polyurethane polymer, a solvent and a co-solvent. The polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having a mass average molecular weight Mw, as determined by gel permeation chromatography against polystyrene standards using N,N-dimethyl acetamide as the eluent, of 50000 g/mol, the solvent is a polar-aprotic solvent such as MEK and the co-solvent is water. The polyurethane polymer, the solvent and the co-solvent are present in such amounts that they form a dispersion. The polyurethane polymer content is 10 weight-%, based on the total weight of the composition and the weight ratio of solvent to co-solvent is in a range of 1:1 to 4:1.

Disclosed are silane modified copolymers that are moisture curable; curable adhesive compositions comprising the silane modified copolymers; and methods of making the silane modified copolymers.

An environment-friendly fire-retardant coating comprises a coating substrate and fire-extinguishing agent microcapsules which can be ruptured and vaporized to a release fire-extinguishing material to achieve the purposes of cooling and/or fire prevention and/or fire extinguishing upon being exposed to a temperature of not less than 75 C. and/or an open flame environment. In order to break the current situation that the traditional fire-prevention, fire-extinguishing and flame-retardant coatings can only prevent the spread of the fire area, but it is difficult to extinguish the fire sensitively and actively in a short time, there are provided a variety of coatings and/or films which can actively cool down, prevent fire and extinguish the fire, have short response time, have stable fire-extinguishing components in the coatings and/or films, with the films being able to trigger the fire extinguishment repeatedly.