Process for preparation polyisocyanate composition
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsShinichiro Watanabe, Kunio Naoi
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Abstract
Using at least one compound selected from the group consisting of a zirconyl compound and a zirconium alcoholate as an allophanation catalyst, an allophanate group-containing polyisocyanate composition is produced from a starting material of at least one isocyanate compound selected from the group consisting of an aliphatic diisocyanate, an alicyclic diisocyanate and an isocyanate pre-polymer obtained therefrom, and another starting material of a hydroxyl group-containing compound.
Claims5
A process for producing an allophanate group-containing polyisocyanate composition from at least one isocyanate compound selected from the group consisting of an aliphatic diisocyanate, an alicyclic diisocyanate and an isocyanate pre-polymer obtained from at least one diisocyanate selected from the group consisting of an aliphatic diisocyanate and an alicyclic diisocyanate, and a hydroxyl group-containing compound through an urethanation reaction and an allophanation reaction, wherein at least one compound selected from the group consisting of a zirconyl carboxylate represented by the following formula (1),
- wherein R1 and R2 are independently of each other an alkyl group, is used as a catalyst for the allophanation reaction.
Dependencies are inferred from the claim text.