Highly crosslinkable low-viscosity polyisocyanate composition and coating composition containing same
AssigneeAsahi Kasei Chemicals Corporation
InventorsYoshiyuki Asahina, Hironori Katagawa
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Abstract
Disclosed is a polyisocyanate composition derived from an aliphatic diisocyanate monomer and an alcohol, which satisfies all the conditions below in a state not containing the aliphatic diisocyanate monomer and a solvent. 1) Isocyanurate trimer concentration: 55-95 mass % 2) Number ratio of allophanate groups derived from the alcohol to isocyanurate groups: 1-20% 3) Urethodione dimmer concentration: 2-25 mass % 4) Viscosity at 25° C.: 150-800 mPa·s.
Claims5
A polyisocyanate composition derived from an aliphatic diisocyanate monomer and an alcohol and satisfies all of the following requirements when the composition contains no aliphatic diisocyanate monomer and no solvent:
- 1) the concentration of an isocyanurate trimer is 55 mass % to 95 mass %;
- 2) the number ratio of allophanate groups derived from the alcohol to isocyanurate groups is 1 to 5%;
- 3) the concentration of an urethodione dimer is 2 to 25 mass %;
- and
- 4) a viscosity at 25% is 150 to 800 mPa·s.
Dependencies are inferred from the claim text.