C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/79 (2006.01) C08G 18/02 (2006.01) C08G 18/72 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2307757
The invention concerns a method for separating an oligomer or polymer compound or compounds (A) obtained by polymerisation of monomer isocyanates (A1) or copolymerisation of monomer isocyanates with another polymerisable compound (A2), in particular a polyol, said compound(s) A having a viscosity (a), from the non-transformed monomer(s), comprising the addition to said compound(s) (A) of one of the compound(s) (B) consisting of the product of the polymerisation of monomer isocyanates (B1) or copolymerisation of monomer isocyanates with another polymerisable compound (B2), in particular polyol, said compounds (B) having a viscosity (b) and the viscosity ratio b/a being less than 1/1.5, preferably less than 1/2 and the co-distillation of (A) and (B), in order to separate the compound(s) (A) from the corresponding non-transformed monomers.
Cette invention concerne un procédé de séparation d'un(de) composé(s) oligomère(s) ou polymère(s) (A) obtenu(s) par polymérisation d'isocyanates monomères (A1) ou copolymérisation d'isocyanates monomères avec un autre composé polymérisable (A2), notamment un polyol, le(s)dit(s) composé(s) A présentant une viscosité (a), d'avec le(s) monomère(s) non transformé(s), comprenant l'addition au(x)dit(s) composé(s) (A) d'un(des) composé(s) (B) consistant en le produit de polymérisation d'isocyanates monomères (B1) ou de copolymérisation d'isocyanates monomères avec un autre composé polymérisable (B2), notamment un polyol, le(s)dit(s) composé(s) (B) présentant une viscosité (b) et le rapport des viscosités b/a étant inférieur à 1/1,5 de préférence inférieur à 1/2 et la co-distillation de (A) et (B), afin de séparer le(s) composé(s) (A) d'avec les monomères correspondants non transformés.
Bernard Jean-Marie
Charriere Eugenie
Revelant Denis
Rhodia Chimie
Robic
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