Polymeric boronic acid derivatives and their use for papermaking
View Patent ↗Polymeric compounds of formula I comprising boronic acid are provided. These polymeric compounds are prepared either by grafting boronic acid containing compounds (e.g. 4-carboxyphenylboronic acid) to hydrolysed poly(N-vinylformamide) or hydrolysing copolymer(s) obtained by copolymerizing vinyl group containing boronic acid monomers (e.g. -vinylphenyl boronic acid) and N-vinylformamide. These polymeric compounds are used in increasing the wet strength of paper in paper-making processes. Formula (I).
1. A polymeric compound of general formula 1, 1A or 4:
wherein R 1 and R 5 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom;
R 2 , R 3 , R 6 and R 7 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom or R 2 and R 3 and/or R 6 and R 7 are together involved in a ring which is optionally substituted;
R 8 is H or a C 1 to C 6 branched or non-branched alkyl;
Q is selected from C 1 to C 12 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted phenyl and substituted or non-substituted fused alkyl or phenyl ring, optionally Q bears a cationic group, an anionic group or is a ring including a heteroatom;
x, y and z are the numbers of the repeating monomer units and are each independently selected from 0 and a number ≧1; and
wherein at least one of the ratio x/(x+y), x/(x+z) and x/(x+y+z) yields a boronic acid content of between 4 and 28% by molar ratio.
2. A polymeric compound of general formula 2:
wherein R 1 and R 5 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom;
R 2 , R 3 , R 6 and R 7 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom or R 2 and R 3 and/or R 6 and R 7 are together involved in a ring which is optionally substituted;
R 8 is H or a C 1 to C 6 branched or non-branched alkyl;
m=0, 1, 2, 3 or 4;
Ri are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted phenyl, cationic group, anionic group, neutral group, and a ring including a heteroatom; and
x, y and z are as defined in claim 1 .
3. A polymeric compound of general formula 2A:
wherein R 1 and R 5 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom;
R 2 , R 3 , R 6 and R 7 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom or R 2 and R 3 and/or R 6 and R 7 are together involved in a ring which is optionally substituted;
R 8 is H or a C 1 to C 6 branched or non-branched alkyl;
m=0, 1, 2, 3 or 4;
Ri are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted phenyl, cationic group, anionic group, neutral group, and a ring including a heteroatom; and
x, y and z are as defined in claim 1 .
4. A polymeric compound of formula 3:
wherein x, y and z are as defined in claim 1 .
5. A polymeric compound of Formula 1 or 1A according to claim 1 , wherein z=0.
6. A polymeric compound of Formula 1 or 1A according to claim 1 , wherein y=0.
7. A polymeric compound of general formula 4:
wherein R 1 , Q, x and y are as defined in claim 1 .
8. A polymeric compound of general formula 5:
wherein R 1 , x and y are defined as in claim 1
R′i is independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted phenyl, cationic group, anionic group, neutral group, and a ring including a heteroatom;
m=0, 1, 2, 3 or 4.
9. A polymeric compound of general formula 5A:
wherein R 1 , x and y are defined as in claim 1
R′i is independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted phenyl, cationic group, anionic group, neutral group, and a ring including a heteroatom;
m=0, 1, 2, 3 or 4.
10. A polymeric compound of general formula 6:
wherein x and y are as defined in claim 1 .
11. A polymeric compound as defined in claim 1 , wherein said boronic acid content is between 5% and 10%.
12. A polymeric compound as defined in claim 1 , wherein the NH 2 content is between 10 to 70% molar.
13. A polymeric compound as defined in claim 12 , wherein the NH 2 content is between 40 to 50% molar.
14. A polymeric compound of Formula 1 or 1A as defined in claim 1 , wherein the NHCO content is between 30 to 50% molar.
15. A polymeric compound as defined in claim 14 , wherein the NHCO content is between 30 to 50% molar.
16. A process of treating a cellulose film comprising:
a. providing a solution of a compound according to claim 1 in a pH buffer solution;
b. soaking the cellulose film in the solution; and
c. rinsing the cellulose film using the pH buffer solution.
17. A process according to claim 16 further comprising the steps of:
d. pressing against one another two cellulose films obtained from steps a) through c); and
e. separating the two films while measuring the peel force.
18. A process according to claim 16 , wherein said treatment involves improving characteristics of the film, said characteristics being selected from paper wet web strength, paper wet strength, flocculation, coating formulation, adhesive, and underwater adhesive.
19. The method for increasing the wet web strength of paper by incorporating into the paper-making process a hydroxyl-containing macromolecule and a compound according to claim 1 .
20. The method for increasing the wet web strength of paper in a paper-making process by a compound according to claim 1 and a compound selected from the group consisting of cationic water soluble polymers, anionic water soluble polymers, nonionic water soluble polymers, latex particles, microgel particles, water soluble carbohydrates, hydroxypropyl guar, and inorganic particles.
21. The polymeric compound of claim 1 , wherein the ratio x/(x+y) yields a boronic acid content of between 4 and 28% by molar ratio.
22. The polymeric compound of claim 1 , wherein the ratio x/(x+z) yields a boronic acid content of between 4 and 28% by molar ratio.
23. The polymeric compound of claim 1 , wherein the ratio x/(x+y+z) yields a boronic acid content of between 4 and 28% by molar ratio.