Monoazo colorants for mass-colouring of polymers
A process for mass-coloring high molecular weight material, in which process a compound of formula or a tautomer thereof, wherein M 1 is H, ½ M 2 , ⅓ M 3 or NR 4 R 5 R 6 R 7 , preferably H, ½ M 2 or NR 4 R 5 R 6 R 7 , especially H, M 2 is an alkaline earth or transition metal in oxidation state II or an oxo-metal in oxidation state IV, M 3 is Al(III), a transition metal in oxidation state III or an oxo-metal in oxidation state V, R 1 is H or a non-ionic substituent, R 2 is H or, independently of R 1 , a further non-ionic substituent, R 3 is H, C 1 -C 6 alkyl, phenyl, CO—C 1 -C 6 alkyl or CO-phenyl, preferably H or CO—C 1 -C 6 alkyl, especially H, and R 4 , R 5 , R 6 and R 7 are each independently of the others H or phenyl, benzyl or C 1 -C 6 alkyl, which are unsubstituted or may be substituted by hydroxy or by halogen and in the case of C 3 -C 6 alkyl is uninterrupted or interrupted by O, is incorporated into the high molecular weight material before or during shaping. The colorations obtained have good light stability and thermal stability, especially in polyolefins.
1. A process for mass-colouring high molecular weight material, in which process a compound of formula
or a tautomer thereof,
is incorporated into the high molecular weight material before or during shaping
wherein
M 1 is H, ½ M 2 , ⅓ M 3 or NR 4 R 5 R 6 R 7 ,
M 2 is an alkaline earth or transition metal in oxidation state II or an oxo-metal in oxidation state IV,
M 3 is Al (III), a transition metal in oxidation state III or an oxo-metal in oxidation state V,
R 1 is H or a non-ionic substituent,
R 2 is H or, independently of R 1 , a further non-ionic substituent,
R 3 is H, C 1 -C 6 alkyl, CO—C 1 -C 6 alkyl or CO-phenyl, and
R 4 , R 5 , R 6 and R 7 are each independently of the others H or phenyl, benzyl or C 1 -C 6 alkyl, which are unsubstituted or substituted by hydroxy or by halogen and in the case of C 3 -C 6 alkyl is uninterrupted or interrupted by O.
2. A process according to claim 1 , wherein M 2 is Ca, Co, Cu, Fe, Mg, Mn, Sr, TiO, Zn or ZrO, or M 3 is Al, Ce, Co, Cr, Fe or VO.
3. A process according to claim 1 , wherein R 1 is a non-ionic substituent having a para Hammett constant σ p of from −0.3 to 0.6, and R 2 is H or, independently of R 1 , a further non-ionic substituent having a para Hammett constant σ p of from −0.3 to 0.6.
4. A process according to claim 1 , wherein in formula (I) SO 3 M is in the position ortho to the azo bridge.
5. A compound of formula
or a tautomer thereof, wherein
M 1 is H, ½ M 2 , ⅓ M 3 or NR 4 R 5 R 6 R 7 ,
M 2 is an alkaline earth or transition metal in oxidation state II or an oxo-metal in oxidation state IV,
M 3 is Al (III), a transition metal in oxidation state III or an oxo-metal in oxidation state V,
R 8 is a non-ionic substituent, different from hydrogen, having a para Hammett constant σ p of from −0.3 to 0.6,
R 9 is H or, independently of R 8 , a further non-ionic substituent having a para Hammett constant σ p of from −0.3 to 0.6,
R 10 is H, C 1 -C 6 alkyl, CO—C 1 -C 6 alkyl or CO-phenyl, and
R 4 , R 5 , R 6 and R 7 are each independently of the others H or phenyl, benzyl or C 1 -C 6 alkyl, which are unsubstituted or substituted by hydroxy or by halogen and in the case of C 3 -C 6 alkyl is uninterrupted or interrupted by O.
6. A compound according to claim 5 of formula
or a tautomer thereof.
7. A compound according to claim 6 of formula
8. A compound of formula
or a tautomer thereof, wherein
M 4 is ½ M 2 , ⅓ M 3 or NR 4 R 5 R 6 R 7 ,
M 2 is an alkaline earth or transition metal in oxidation state II or an oxo-metal in oxidation state IV,
M 3 is Al (III), a transition metal in oxidation state III or an oxo-metal in oxidation state V,
R 9 is H or, independently of R 8 , a further non-ionic substituent having a para Hammett constant σ p of from −0.3 to 0.6,
R 10 is H, C 1 -C 6 alkyl, CO—C 1 -C 6 alkyl or CO-phenyl, and
R 4 , R 5 , R 6 and R 7 are each independently of the others H or phenyl, benzyl or C 1 -C 6 alkyl, which are unsubstituted or substituted by hydroxy or by halogen and in the case of C 3 -C 6 alkyl is uninterrupted or interrupted by O.
9. A mixture or solid solution comprising a compound according to claim 5 and a compound of formula
wherein M 4 + is Na + , Li + or K + ,
R 1 is H or a non-ionic substituent,
R 2 is H or, independently of R 1 , a further non-ionic substituent, and
R 3 is H, C 1 -C 6 alkyl, CO—C 1 -C 6 alkyl or CO-phenyl.
10. A mass-coloured high molecular weight material comprising from 0.01 to 70% by weight, based on the total coloured high molecular weight material, of a compound of formula (II) according to claim 5 , which is present in the form of solid particles distributed in the high molecular weight material or which, in dissolved form, homogeneously penetrates the high molecular weight material.
11. A mass-coloured high molecular weight material according to claim 10 wherein the high molecular weight material is a polyolefin.
12. A mass-coloured high molecular weight material comprising from 0.01 to 70% by weight, based on the total coloured high molecular weight material, of a compound of formula (III) according to claim 8 , which is present in the form of solid particles distributed in the high molecular weight material or which, in dissolved form, homogeneously penetrates the high molecular weight material.
13. A mass-coloured high molecular weight material comprising from 0.01 to 70% by weight, based on the total coloured high molecular weight material, of a compound of formula (IV), (V) or (VI) according to claim 6 , which is present in the form of solid particles distributed in the high molecular weight material or which, in dissolved form, homogeneously penetrates the high molecular weight material.
14. A mass-coloured high molecular weight material comprising from 0.01 to 70% by weight, based on the total coloured high molecular weight material, of a compound of formula (VII) according to claim 7 , which is present in the form of solid particles distributed in the high molecular weight material or which, in dissolved form, homogeneously penetrates the high molecular weight material.
15. A mass-coloured high molecular weight material comprising from 0.01 to 70% by weight, based on the total coloured high molecular weight material, of a mixture or solid solution according to claim 9 , which is present in the form of solid particles distributed in the high molecular weight material or which, in dissolved form, homogeneously penetrates the high molecular weight material.
16. A mass-coloured high molecular weight material according to claim 12 wherein the high molecular weight material is a polyolefin.
17. A mass-coloured high molecular weight material according to claim 13 wherein the high molecular weight material is a polyolefin.
18. A mass-coloured high molecular weight material according to claim 15 wherein the high molecular weight material is a polyolefin.
19. A compound of formula (II) according to claim 5 , wherein
M 1 is H, ½ M 2 or NR 4 R 5 R 6 R 7 ,
R 8 is a non-ionic substituent, different from hydrogen, having a para Hammett constant σ p of from −0.3 to 0.3,
R 9 is H or, independently of R 8 , a further non-ionic substituent having a para Hammett constant σ p of from −0.3 to 0.3,
and R 10 is H or CO—C 1 -C 6 alkyl.
20. A compound of formula (III) according to claim 8 , wherein R 9 is H or non-ionic substituent having a para Hammett constant σ p of from −0.3 to 0.3, and R 10 is H or CO—C 1 -C 6 alkyl.