IR absorbing compositions

摘要

Transparent thermoplastic polymer compositions contain: (A) an organic NIR absorber; and (B) oxide particles of average size below 20 nm which are surface modified by polyvinyl acetate or a silane. Transparent thermoplastic polymer compositions contain: (A) an organic NIR (near infrared) absorber; and (B) oxide particles of average size below 20 nm which are In oxides with 2-30% of the In atoms replaced by Sn atoms or with 10-70% of the O atoms replaced by F atoms, Sn oxides with 2-60% of the Sn replaced by Sb and/or 10-70% of the O replaced by F, Zn oxides with 1-30% of the Zn replaced by Al or 2-30% of the Zn replaced by In or Ga, perovskites or compounds of formula (I), the surfaces of these particles being modified by polyvinyl acetate or a silane of formula (II). AxBO3-y (I) SiR1>R2>R3>R4> (II) x : 0.01-3; y : 0.001-1.5; A : Ca, Sr, Ba, Al, In, Sn, Pb, Cu, Ag, Cd, Li, Na, K, Rb, Cs, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, H or NH4; B : W, Mo or Re; R1>1-30C alkyl; R2> and R3>1-30C alkyl or alkoxy, Cl, Br or I; and R4>1-30C alkoxy, Cl, Br or I.