BISMUTH COMPOUND BASED PIGMENTS Russian patent published in 2018 - IPC C09C1/00 C01G29/00 C08K3/22 C08K3/24 C08K3/34 B41M5/26 

FIELD: chemistry.

SUBSTANCE: invention can be used in the manufacture of plastic products, paints, coatings. Pigment characterized by the chemical formula n B₂O₃ * m BiOX * o Bi_xX_yO_z * p Bi_aSi_bO_c, where X is halogen, x=2–30, y=1–15, when y=1, z>1, z=1–35, a=0–15, b=1–5, c=1–25, n=0–5, m=0–5, o=1–5, p=1–5. To obtain said pigment, a bismuth compound selected from the group Bi₂O₃, BiOCl, BiONO₃, Bi(NO₃)₃, Bi₂O₂CO₃, BiOOH, BiOF, BiOBr, BiOC₃H₅O₇, Bi(C₇H₅O₂)₃, BiPO₄, Bi₂(SO₄)₃, Bi_aM_bO_c (where M=Zn, Ti, Fe, Cu, Al, Zr, P, Sn, Sr, Si, Y, Nb, La, Ta, Pr, Ca, Mg, Mo, W, Sb, Cr, Ba, Ce and a=0.3–70, b=0.05–8 and c=1–100), is coated with SiO₂ in the presence of a chlorine compound. Then calcination is carried out at 300–815 °C.

EFFECT: invention makes it possible to obtain a universal additive in polymers absorbing laser radiation and not causing degradation reactions in the polymer matrix when laser marking is applied to plastic products.

12 cl, 1 tbl, 8 ex