Phosphoric esters and their use as dispersants
View Patent ↗The invention relates to phosphoric esters of the general formula I where X is 1 or 2; n is from 2 to 18; m and o are each from 2 to 100; k is from 2 to 4; R″ is H or a linear or branched alkyl radical; and R′ is an alkyl, alkaryl, alkenyl, or sulfopropyl radical, and to there use as dispersants for pigments and fillers in aqueous or organic media.
1. A phosphoric ester having the formula:
x is 1 or 2,
n is a number from 2 to 18,
m and
o are each a number from 1 to 100,
k is a number from 2 to 4, and
R″ is H or a linear or branched alkyl radical.
R′ is an alkyl, alkaryl, alkenyl or sulfopropyl radical.
2. The phosphoric ester pigment preparation of claim 1 18 wherein the ratio of m/o is from 1:10 to 10:1.
3. The phosphoric ester pigment preparation of claim 1 18 wherein the ratio of m/o is from 1:2 to 10:1.
4. The phosphoric ester of claim 1 wherein the average molecular weight is from 300 to 15,000 g/mol.
5. The phosphoric ester of claim 1 wherein the average molecular weight is from 500 to 5000 g/mol.
6. The phosphoric ester of claim 1 17 wherein R″=H.
7. A method of forming a dispersion comprising dispersing a phosphoric ester of claim 1 17 with one or more pigments or fillers in an aqueous or organic medium.
8. The method of claim 7 wherein R″=H.
9. A method of forming a highly filled sheet molding compound or bulk molding compound, comprising dispersing components of a molding compound and a phosphoric ester as of claim 1 17 .
10. The method of claim 9 wherein R″=H.
11. A pigment preparation comprising one or more organic or inorganic pigments and from 1 to 100% by weight, based on the pigments, of a dispersing additive having the formula:
x is 1 to 2,
n is a number from 2 to 18,
m and
o are each a number from 2 to 100,
k is a number from 2 to 4, and
R″ is H or a linear or branched alkyl radical.
12. The pigment preparation of claim 11 18 wherein R″=H.
13. An aqueous paste comprising one or more organic or inorganic colorants and from 1 to 100% by weight, based on the colorants, of a dispersing additive having the formula:
x is 1 to 2,
n is a number from 2 to 18,
m and
o are each a number from 2 to 100,
k is a number from 2 to 4, and
R″ is H or a linear or branched alkyl radical.
14. An aqueous paste of claim 13 19 wherein R″=H.
15. A carbon black paste comprising from 10 to 100% by weight, based on the weight of carbon black, of a dispersing additive having the formula:
x is 1 or 2,
n is a number from 2 to 18,
m and
o are each a number from 2 to 100,
k is a number from 2 to 4, and
R″ is H or a linear or branched alkyl radical.
16. A carbon black paste of claim 15 20 wherein R″=H.
17. A phosphoric ester having the formula:
x is 1 or 2 ,
n is a number from 2 to 18 ,
m and o are each a number from 2 to 100 ,
k is a number from 2 to 4 ,
R″ is H or a linear or branched alkyl radical,
R′ is an alkyl, alkaryl, alkenyl or sulfopropyl radical, and with the proviso that when R=
the average molecular weight of said phosphoric ester is not more than about 2184 g/mol.
18. A pigment preparation comprising one or more organic or inorganic pigments and from 1 to 100 % by weight, based on the pigments, of a dispersing additive having the formula:
x is 1 to 2 ,
n is a number from 2 to 18 ,
m and o are each a number from 2 to 100 ,
k is a number from 2 to 4 ,
R″ is H or a linear or branched alkyl radical,
R′ is an alkyl, alkaryl, alkenyl or sulfopropyl radical, and with the proviso that when R=
the average molecular weight of said phosphoric ester is from 500 to 5000 g/mol.
19. An aqueous paste comprising one or more organic or inorganic colorants and from 1 to 100 % by weight, based on the colorants, of a dispersing additive having the formula:
x is 1 to 2 ,
n is a number from 2 to 18 ,
m and o are each a number from 2 to 100 ,
k is a number from 2 to 4 ,
R″ is H or a linear or branched alkyl radical, and
R′ is an alkyl, alkaryl, alkenyl or sulfopropyl radical.
20. A carbon black paste comprising from 10 to 100 % by weight, based on the weight of carbon black, of a dispersing additive having the formula:
x is 1 to 2 ,
n is a number from 2 to 18 ,
m and o are each a number from 2 to 100 ,
k is a number from 2 to 4 ,
R″ is H or a linear or branched alkyl radical, and
R′ is an alkyl, alkaryl, alkenyl or sulfopropyl radical.
21. The phosphoric ester of claim 17 , wherein o is not less than 4 .
22. The aqueous paste of claim 19 wherein the ratio of m/o is from 1 : 10 to 10 : 1 .
23. The aqueous paste of claim 19 wherein the ratio of m/o is from 1 : 2 to 10 : 1 .
24. The carbon black paste of claim 20 wherein the ratio of m/o is from 1 : 10 to 10 : 1 .
25. The carbon black paste of claim 20 wherein the ratio of m/o is from 1 : 2 to 10 : 1 .