TECHNOLOGY FOCUS - POLYMERS - Preferred Contents: The nanoscale pigment particles have average particle diameter as derived from transmission electron microscopy imaging, of less than 150 nm. The nanoscale pigment particles have aspect ratio of 1:1-7:1. Preferred Components: The benzimidazolone pigment comprises diazo component and nucleophilic coupling component group linked together with azo group(s), where diazo component and/or nucleophilic coupling component comprises benzimidazolone. The diazo component group is compound of formulae (I), (II), (III), (IV), (V), (VI) or (VII). The nucleophilic coupling component is compound formulae (VIII) or (IX). The sterically bulky stabilizer is associated with the benzimidazolone pigment predominantly by intra-molecular and/or inter-molecular hydrogen bonding, aromatic pi-stacking, and van der Waals forces. The sterically bulky stabilizer is compound of formulae (X), (XI), or (XII). The composition further comprises surfactant or surface additive of derivatives of rosin natural products; long-chain or branched hydrocarbon alcohols; alcohol ethoxylates; acrylic-based polymers; styrene-based copolymers; copolymers of a-olefins; copolymers of vinyl pyridine, vinyl imidazole, and vinyl pyrrolidinone; polyester copolymers; polyamide copolymers; and copolymers of acetals and acetates. The sterically bulky stabilizer compound comprises substituted pyridine derivative (X) or (XII).asterisk=point of attachment to amino group (-NH2) in the diazo component precursor and point of attachment to azo group (-N=N-) in the pigment structure;R1-R8=H, halo, (CH2)nCH3, OH, alkoxy -OR', CO2H, CO2CH3, CO2(CH2)n2CH3, CONH2, (CO)R", OCH3, OCH2CH2OH, NO2, SO3H or compounds of formulae (i), (ii), (iii) or (iv);n=0-6;R'=H, (CH2)n1CH3 or C6H5;n1=1-6;n2=0-5;R"=H, C6H5, (CH2)n3CH3 or (CH2)n4N(CH3)2;n3=0-12;n4=1-6;andA=-(CH2)n-, -(O(CH2)nO)-, -(-O(CH2CHR)n), R=H, CH3, -(C=O)-, O, S, -(CH2)n1-(C=O)-, or -(C=O)-(CH2)n1-(C=O).R9, R10, R11, R12, R13=H, Br, Cl, I, F, CH3 or OCH3;andasterisk=point of attachment to the azo group in the pigment.R1-R5=H (preferably), -NH-(C=O)-R', -(C=O)-NH-R', -NH-R', -NH-(C=O)-NH-R', -NH-(C=O)-O-R', O-(C=O)-NH-R', -(C=O)-O-R', -O-(C=O)-R', optionally branched alkyleneoxy chains or -OR';andR'=predominantly optionally linear alkyl or cycloaliphatic having heteroatoms within the alkyl groups.Provided that if R1 is -C(=O)-NH-(CH2)17CH3 (a), -C(=O)-NH-CH2-CH(CH3)-CH2-CH2-CH(CH3)2 (b), -C(=O)-NH-CH2-CH2-CH2-O-CH2-CH(C10H21)-C8H17 (c), compound of formula (viii), and R2, R3, R4 and R5 are H; asterisk-C(=O)-O-(CH2)nCH3 (d), n is 5, 11 or 21 and and R2, R3, R4 and R5 are H; asterisk-C(=O)-O-CH2-CH(CH2)n(CH3)-(CH2)mCH3 (e), R2, R3, R4 and R5 are H, if m is 3, n is 1 or 5, if m is 7, n is 5, and if m is 11, n is 9; asterisk-C(=O)-O-(CH2-CH(CH3)-O)m-(CH2)n-CH3 (f), R2, R3, R4 and R5 are H, if m is 2 and n is 3, and if m is 3 and n is 3; asterisk-C(=O)-O-(CH2-CH2-O)m-(CH2)nCH3 (g), R2, R3, R4 and R5 are H, if m is 1 and n is 3, and if m is 2 and n is 3; -NH-C(=O)-CH((CH2)mCH3)-(CH2)nCH3 (h), R2, R3, R4 and R5 are H, and if m is 11, n is 9, if m is 7, n is 5, and if m is 5, n is 3; compound (ix) and R2, R3, R4 and R5 are H; compound (x) and R2, R3, R4 and R5 are H; -NH-C(=O)-NH-(CH2)17CH3 (j) and R2, R3, R4 and R5 are H; -O-C(=O)-NH-(CH2)17CH3 (k) and R2, R3, R4 and R5 are H; -NH-C(=O)-(CH2)17CH3 (l), and R2, R3, R4 and R5 are H; -NH-CH2-CH((CH2)mCH3)-(CH2)nCH3 (m) and R2, R3, R4 and R5 are H; -NH-(CH2)nCH3 (n) and R2, R3, R4 and R5 are H; compound (xi) and R2, R3, R4 and R5 are H; compound (b), R2, R3 and R4 are H, and R5 is compound (b); compound (c), R2, R3 and R4 are H, and R5 is compound (c); compound (viii), R2, R3 and R4 are H, and R5 is compound (viii); compound (d), R2, R3 and R4 are H, and R5 is compound (d); compound (e) R2, R3 and R4 are H, and R5 is compound (e); compound (f), R2, R3 and R4 are H, and R5 is compound (f); compound (g), R2, R3 and R4 are H, and R5 is compound (g); compound (h), R2, R3 and R4 are H, and R5 is compound (h); compound (a) R2, R3 and R4 are H, and R5 is compound (a); compound (ix), R2, R3 and R4 are H, and R5 is compound (ix); compound (x), R2, R3 and R4 are H, and R5 is compound (x); compound (j), R2, R3 and R4 are H, and R5 is compound (j); compound (k), R2, R3 and R4 are H, and R5 is compound (k); compound (l), R2, R3 and R4 are H, and R5 is compound (l); compound (m), R2, R3 and R4 are H, and R5 is compound (m); or compound (n), R2, R3 and R4 are H, and R5 is compound (n).X'=-N(H)- or -O-;R1, R2=asterisk-(CH2)3-O-CH2-CH((CH2)mCH3)-(CH2)nCH3 or asterisk-CH2-CH((CH2)mCH3);andm, n=0-30.Ry=-(CH2)n, -X'-(CH2)nX', -((XH2CH2)n)X-. -((C=O)-(CH2)n-(C=O))-, -X'-((C=O)-(CH2)n-(C=O)-)-X'-, -X'-((C=O)-X'-(CH2)n-X'-(C=O))-X'-, -((C=O)-X'-(CH2)n-X'-(C=O)), or compound of formula (v), (vi) or (vii).Provided that X' is -NH-C(=O)-NH-Ry or -O-C(=O)-NH-Ry, R1, R2 and R3 are H, and Ry is compound of formula (xii); -NH-C(=O)-Ry, R1, R2 and R3 are H, and Ry is compound of formula (xiii); -O-C(=O)-Ry, R1, R2 and R3 are H, and Ry is compound of formula (xiii); -C(=O)-O-Ry, R1, R2 and R3 are H, and Ry is compound of formula (xii); or R1, R2 and R3 are H, and Ry is compound of formula (xii).X', X'1, X'2=O, S or NH;andn=1-50. EXAMPLE - Anthranilic acid (1.79 g), deionized water (30 mL), and 5 M hydrochloric acid (6.5 mL) were mixed with stirring into 3 neck round bottom flask equipped with a thermometer. The clear solution was cooled to below 0 degrees C before 2.5 mL of cold aqueous 5.7 M sodium nitrite (NaNO2) was added at rate to maintain internal temperature below 0 degrees C. The cold diazo solution was stirred for additional 30 minutes, after which it was slowly added at room temperature to a suspension of coupling component. The steric stabilizer compound (0.5 g) was added hot into solution having 5-acetoacetylamino-benzimidazolone (3.05 g), aqueous 5 M sodium hydroxide (18 mL), and deionized water (200 mL), and mixture was emulsified with rapid mechanical agitation. After 10 minutes, concentrated glacial acetic acid (5.5 mL) was added to emulsion, providing fine white suspension of coupling component. After overnight stirring, the yellow pigment solids were separated by vacuum filtration. The pigment wetcake was reslurried in deionized water and then separated by vacuum filtration twice more before freeze-drying, and resulted in a bright yellow powder (4.8 g). Electron microscopy analysis of the pigment solids exhibited predominantly small elongated primary nanoparticles with lengths of 20-200 nm, with majority at less than 100 mm dynamic light scattering analysis of colloidal solution of sample (n-butanol, 0.01 mg/mL) gave average effective hydrodynamic diameter of 143 nm.