US 11,952,499 B2
Layer sequence with colour flop effect including platelet-shaped effect pigments
Giuseppe Gianetti, Saronno (IT); Giuseppe Ciriello, Valdagno (IT); Adriano Nicolin, San Pietro in Gu (IT); Tim Salzwedel, Hann. Münden (DE); Lutz Frischmann, Ismaning (DE); and Sylvia Klausnitzer, Bruckmühl (DE)
Assigned to Hubergroup Italia, Bolzano Vicentino VI (IT)
Appl. No. 16/968,561
Filed by Hubergroup Italia, Bolzano Vicentino (IT)
PCT Filed Feb. 11, 2019, PCT No. PCT/EP2019/053332
§ 371(c)(1), (2) Date Aug. 7, 2020,
PCT Pub. No. WO2019/155068, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 18156380 (EP), filed on Feb. 12, 2018.
Prior Publication US 2021/0040328 A1, Feb. 11, 2021
Int. Cl. C09C 1/00 (2006.01); B05D 5/06 (2006.01); C09D 5/36 (2006.01); C09D 7/40 (2018.01); C09D 11/037 (2014.01); D21H 17/63 (2006.01); D21H 21/28 (2006.01)
CPC C09C 1/0015 (2013.01) [B05D 5/065 (2013.01); C09D 5/36 (2013.01); C09D 7/68 (2018.01); C09D 7/69 (2018.01); C09D 7/70 (2018.01); C09D 11/037 (2013.01); D21H 17/63 (2013.01); D21H 21/285 (2013.01); C09C 2200/305 (2013.01); C09C 2200/308 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
a) at least one first colour layer (18) containing a dye (26) and/or pigment,
b) on the at least one first colour layer (18) an effect layer (20) containing at least one platelet-shaped effect pigment (28), wherein the at least one platelet-shaped effect pigment (28) is composed of particles (46) having an average length (48) of 2 to 500 μm, an average width (50) of 2 to 500 μm and an average thickness of at most 1 μm,
c) on the effect layer (20) at least one second colour layer (22) containing a dye (30) and/or pigment,
wherein each of the at least one first colour layer (18) and of the at least one second colour layer (22) contains a dye (26, 30) and/or pigment being no platelet-shaped effect pigment, wherein the at least one dye (26) and/or at least one pigment included in the at least one first colour layer (18) is different from the at least one dye (30) and/or at least one pigment included in the at least one second colour layer (22),
wherein, at least if the at least one first colour layer (18) has a sum of reflectance and scattering of less than 40%, the system further comprises:
d) below the at least one first colour layer (18) a lower layer (16) containing a pigment (24) and having a sum of reflectance and scattering of at least 40%,
wherein the system does not contain any interference pigment, wherein the interference pigment is defined to be a pigment which produces an interference of light waves, and
wherein the delta a/b is at least 15, wherein the delta a/b is determined according to the equation delta a/b=((a[15°]−a[110°])2+(b[15°]−b[110°])2)1/2, wherein a[15°] is the a-value measured at an observation value of 15°, a[110°] is the a-value measured at an observation value of 110°, b[15°] is the b-value measured at an observation value of 15° and b[110°] is the b-value measured at an observation value of 110°, wherein the measurement is performed by irradiating in a dark environment a standardized light type onto the system at an angle of incident of 45° with respect to the horizontal direction, wherein the angle of reflection of 135° with respect to the horizontal direction is defined as an observation angle of 0°.