Abstract: Disclosed are compositions, which are stabilized against degradation and yellowing during exposure to ultraviolet light by the presence of certain hindered amine additives, a method of stabilizing the compositions by the addition of said additives, to the use of such compositions as media in electroactive devices such as electrochromic and electrophoteric devices, and the electroactive devices comprised of these media.

Abstract: This invention is a method for incorporating additives into a polymeric materials such as coatings and plastics, which comprises treating the polymeric material with light prior to applying a removable coating of a composition comprising the additives to the surface of the polymeric material and allowing the coating to remain in contact with the polymeric material for a time sufficient to allow the additives to diffuse into the polymeric material.

Abstract: This invention is a method for incorporating light stabilizers into a polymeric material such as coatings, paints and plastics, which comprises the steps of applying a coating of a composition comprising a light stabilizer on the polymeric material and allowing the coating to remain in contact with the polymeric material for a time sufficient to cause the light stabilizer to diffuse into the polymeric material. No active heating of the polymeric substrate is required. Ambient conditions encountered in natural outdoor weathering will suffice to allow diffusion of stabilizers. Other additives affecting the aging or performance of the polymeric material can also be incorporated by this method.

Abstract: Disclosed are compositions, which are stabilized against degradation and yellowing during exposure to ultraviolet light by the presence of certain hindered amine additives, a method of stabilizing the compositions by the addition of said additives, to the use of such compositions as media in electroactive devices such as electrochromic and electrophoteric devices, and the electroactive devices comprised of these media.