| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum pigment composition for water-base materials whose metallic unevenness is improved and color tone and appearance can be attained to the same extent as an organic solvent-based coating material by enhancing thixotropy of the water-base coating material to enhance orientation of an aluminum pigment after application. SOLUTION: The aluminum pigment composition for water-base coating materials which comprises an aluminum pigment, a rheology modifier, and an organic solvent, is characterized in that the organic solvent has a solubility parameter of 6 to 12 and exhibits solubility of 30 mass% or below in water at 20°C, and that when the rheology modifier is added to a resin emulsion and the obtained mixture is subjected to viscosity determination with a Brookfield type viscometer, both viscosity B<SB>60</SB>at a number of revolutions of 60 and viscosity B<SB>6</SB>at a number of revolutions of 6 fall within the range of 0.3 to 30 Pa s and the B<SB>6</SB>/B<SB>60</SB>ratio, namely, thixotropic index is 1 to 60. COPYRIGHT: (C)2010,JPO&INPIT |
