Use of water-based carbonyl-functional polymers on a cross-linker-free highperformance leather finish
The present paper aims to study a new high-performance coating formulation while avoiding the use of cross-linkers. 
By using acrylic polymers with carbonyl functional groups, the negative environmental effects of the finishing process can be minimized. These new polymers can give very good physical properties without losing the inherent properties 
of flexibility and elasticity needed in upholstery leather
Nubuck finishing with water-based carbonyl - Functional polymers
The process of leather finishing causes environmental pollution. It produces both wastewaters and emissions to atmosphere. 1 The present paper details the study of a new coating formulation intended to minimize the negative environmental effects of this process. This study tests an alternative method of nubuck finishing imitating full grain using using water-based carbonyl-functional polymers and micro-dispersed pigments. These new polymers can achieve very good physical properties without losing the inherent properties of flexibility and elasticity. The application of these new products together with micro-dispersed pigments enables the reduction of the amount of products needed and, therefore, makes it possible to reduce wastewaters and atmospheric emissions. The leather finished using this new coating formulation is soft, with a very natural handle; with only 0.02mm thick coating, all the necessary requirements for leather goods are met and, most importantly, a great capacity for covering defects is achieved.
Decomposable crosslinking paint: Waste minimization
A paint film crosslinked by a reaction between a carbonyl group and a hydrazide group could be easily decomposed by dipping it in a solution containing water, solvents, and acids. The method was studied to minimize the waste produced by the elimination of the decomposable paint film. This was performed in two steps: a dipping in aqueous solution containing solvents and acids, and a successive wash with solvents. Decomposition of the crosslinking bonds and the elution of the decomposed free crosslinker took place in the first dipping process, and the elimination of the decomposed resins in the second washing process. The aqueous solution could be used for a long time without contamination by the decomposed resins, and the decomposed resin could easily be recovered from the resin solution containing no other contaminants.