Method for obtaining coating compositions having reduced voc

Details Method for obtaining coating compositions having reduced voc Method for obtaining coating compositions having reduced voc

C - Chemistry, Metallurgy

08

F

C08F 8/00 (2006.01)

Patent

CA 2535173

Disclosed is a method of making reduced VOC polymers and coating compositions containing polymers. Provided is a mixture (I) comprising a reactant mixture (a) of polymerizable components and a nonvolatile solvent (bnv) that (i) is not a crystalline solid at 25~C, (ii) is nonvolatile, (iii) comprises at least one functional group (F1) and (iv) is a fluid solid. Reactant mixture (a) is polymerized to provide a polymer (a'). At least one functional group (F1) of nonvolatile solvent (bnv) is reacted with one or more reactants (e) to obtain a nonvolatile solvent (b'nv) comprising at least two functional groups (F2). Obtained is a mixture (II) comprising polymer (a') in nonvolatile solvent (b'nv) comprising at least two functional groups (F2). The at least one functional group (F1) is substantially nonreactive: (1) with the components of reactive mixture (a), (2) under the polymerization conditions which polymerize reactant mixture (a), and (3) with polymer (a').

L'invention concerne un procédé de préparation de polymère à teneur réduite en VOC et de compositions de revêtement contenant ces polymères. Cette invention concerne également un mélange (I) comprenant un mélange réactif (a) de composants polymérisables et un solvant non volatil (b¿nv?) qui (i) n'est pas un solide cristallin à 25·C, (ii) qui est non-volatil, (iii) qui comprend au moins un groupe fonctionnel (F¿1?) et (iv) qui est un solide fluide. Le mélange réactif (a) est polymérisé afin de produire un polymère (a'). Le groupe fonctionnel (F¿1?) de solvant non-volatil (b¿nv?) est mis en réaction avec un ou plusieurs réactifs (e) afin d'obtenir un solvant non volatil (b'¿nv?) comprenant au moins deux groupes fonctionnels (F¿2?). Le mélange (II) obtenu comprend un polymère (a') dans un solvant non-volatil (b'¿nv?) comprenant au moins deux groupes fonctionnels (F¿2?). Le groupe fonctionnel (F¿1?) est sensiblement non réactif: (1) avec des composants du mélange réactif (a), (2) dans des conditions de polymérisation qui polymérise le mélange réactif (a), et (3) avec un polymère (a').

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