Liquid mdi adducts with improved freeze stability

Details Liquid mdi adducts with improved freeze stability Liquid mdi adducts with improved freeze stability

C - Chemistry, Metallurgy

08

G

C08G 18/76 (2006.01) C08G 18/48 (2006.01) C08G 18/72 (2006.01) C08G 18/78 (2006.01)

Patent

CA 2330993

This invention relates to liquid polyisocyanate compositions having improved freeze stability. These liquid polyisocyanate compositions have an NCO group content of 15 to 30%, and comprise (A) an allophanate--modified MDI and having an NCO group content of 16 to 32.5%, (B) a low molecular weight branched aliphatic dihydroxy compound, and (C) an epoxide functional compound which is present in an amount of 0.01 to 1% by weight, based on the combined weight of components (A) and (B).

Cette invention concerne des composés de polyisocyanate liquide ayant une stabilité accrue au gel. Ces composés de polyisocyanate liquide ont une teneur en groupes NCO de 15 à 30 %, et comprennent (A) un MDI modifié par un allophanate et ayant une teneur en groupes NCO de 16 à 32,5 %, (B) un faible poids moléculaire d'un composé de dihydroxy aliphatique ramifié, et un composé d'époxyde fonctionnel qui est présent en une quantité de 0,01 à 1 % en poids, basé sur le poids combiné des composantes (A) et (B).

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