Abstract: A paint composition comprising a powder paint uniformly dispersed in an aqueous solution of a water soluble carboxylated resin. Use is made of a powder paint having a mean particle size of 1-100 microns and preferably comprising a thermosetting resin as the vehicle. This paint composition contains no surfactant but, nevertheless, features high stability of the dispersion phase and can provide paint films of excellent resistance to water. This paint composition may utilize recovered waste powder paint, i.e. a mixture of differently colored powder paints, preferably with the addition of a black pigment such as carbon black.

Abstract: A catalyst, which has high and long-lasting activity on both the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides particularly when an internal combustion engine is operated at an air-fuel ratio around a stoichiometric ratio, consists of a carrier of active alumina, 0.05-0.2 Wt% platinum, 0.0015-0.045 Wt% rhodium and 0.002-5 Wt% boron.