Abstract: A method for preventing hardener compounds to be formed from hardener precursors in an aerosol formulation suitable for use in aerosol for making a paint is disclosed.

Abstract: The invention relates to a method for testing a mutual combability of coating material and propellant and preparing a water based aerosol paint composition having a high concentration of coating material said method comprising: selecting at least one pair of polymeric resin and propellant, further selecting said selected propellant-polymeric resin-pair so that the propellant and the polymeric resin will pass the mutual combability test in a pressurized vessel in the presence of water-based solvent, providing into an aerosol can A) 50-85% w/w of coating material, and B) selected propellant 15-50% w/w; and sealing the can after or before adding ingredients in method stages A and B.

Abstract: The invention relates to a method for reducing water content of an epoxy or/and polyurethane paint dispersion to be prepared in a sealed and pressurized aerosol can which paint dispersion comprises, —free water of an amount W1, —organic solvent(s) of an amount W2,5-epoxy or/and polyurethane resin of an amount W3, —liquefied propellant of an amount W5, —ketone of an amount W6, —blocked hardener (hardener precursor) of the epoxy or/and polyurethane resin of an amount W4, wherein said blocked hardener compounds of said epoxy or/and 10 polyurethane resin is selected from the group comprising of an aldimine, an enamine, an imine, a Mannich base, a Schiff's base, an oxazolidine or a bisoxazol-idine, and mixtures thereof, —adjuvants, —water scavenger(s), —catalytic amount of a weak acid to shift equilibrium of reversible reaction (I) between the free water present in said dispersion and blocked hardener compounds of the epoxy or/and polyurethane resin back to formation of said initial epoxy or polyure-thane blocked

Abstract: A method is disclosed for preventing hardener compounds to be formed from hardener precursors in a sealed and pressurized aerosol can. This includes a paint forming dispersion containing after sealing the can a liquefied propellant, epoxy or/and polyurethane resins amount W1, hardener precursor of the epoxy or/and polyurethane resins amount W3, where the epoxy or urethane hardener precursors are selected from a group including an imine, an enamine, a Mannich base, a Schiff's base, an oxazolidine, an aldimine and mixtures thereof, free water of amount W1 in a range of 1-10000 ppm, and brought into the can alongside with the other paint dispersion forming chemicals before sealing the can.

Abstract: A method is disclosed for preventing hardener compounds to be formed from hardener precursors in a sealed and pressurized aerosol can. This includes a paint forming dispersion containing after sealing the can a liquefied propellant, epoxy or/and polyurethane resins amount W1, hardener precursor of the epoxy or/and polyurethane resins amount W3, where the epoxy or urethane hardener precursors are selected from a group including an imine, an enamine, a Mannich base, a Schiff's base, an oxazolidine, an aldimine and mixtures thereof, free water of amount W1 in a range of 1-10000 ppm, and brought into the can alongside with the other paint dispersion forming chemicals before sealing the can.

Abstract: A method for preventing hardener compounds to be formed from hardener precursors in an aerosol formulation suitable for use in aerosol for making a paint is disclosed.