2-dimethylaminoethyl acrylate polymers and their preparation method
The present invention relates to a water-soluble polymer obtained by polymerization of at least a 2-dimethylaminoethyl acrylate monomer and/or its salts, in presence of at least a tocopherol and/or its derivatives, or a tocotrienol and/or its derivatives, and its uses.
1. A water-soluble polymer obtained by polymerization of at least a 2-dimethylaminoethyl acrylate monomer and/or its salts, in presence of at least a tocopherol and/or its derivatives, or a tocotrienol and/or its derivatives.
2. A water-soluble polymer according to claim 1 , said water-soluble polymer being obtained by polymerization of at least a 2-dimethylaminoethyl acrylate monomer and/or its salts in presence of at least an α-tocopherol.
3. A water-soluble polymer according to claim 1 , wherein the quantity of tocopherol and/or its derivatives, or tocotrienol and/or its derivatives is comprised between 1 ppm and 10 000 ppm, based on the amount of 2-dimethylaminoethyl acrylate monomer and/or its salts.
4. A water-soluble polymer according to claim 1 , wherein the tocopherol and/or its derivatives, or the tocotrienol and/or its derivatives, is added to the 2-dimethylaminoethyl acrylate monomer and/or its salts after the synthesis of said 2-dimethylaminoethyl acrylate monomer and/or its salts.
5. A water-soluble polymer according to claim 1 , wherein the tocopherol and/or its derivatives, or the tocotrienol and/or its derivatives is added to the 2-dimethylaminoethyl acrylate monomer and/or its salts before the storage of said 2-dimethylaminoethyl acrylate monomers and/or its salts.
6. A water-soluble polymer according to claim 1 , wherein the 2-dimethylaminoethyl acrylate monomer is quaternized with methyl chloride.
7. A water-soluble polymer according to claim 1 , wherein the water-soluble polymer comprises at least 1 mol % of 2-dimethylaminoethyl acrylate monomer and/or its salts based on the total number of moles of monomers.
8. A water-soluble polymer according to claim 1 , wherein the water-soluble polymer has an average molecular weight by weight comprised between 50 000 g/mol and 30 000 000 g/mol.
9. A composition comprising:
from 1 to 99,9999 w % of at least one 2-dimethylaminoethyl acrylate monomer and/or its salts;
from 1 to 10 000 ppm of at least a tocopherol and/or its derivatives, or a tocotrienol and/or its derivatives, based on the amount of 2-dimethylaminoethyl acrylate monomer and/or its salts,
Optionally at least an additive chosen from biocides, polymerization inhibitors, humidity absorbers, colour stabilisers.
10. A composition according to claim 9 , comprising at least one colour stabiliser chosen from: niacinamide, retinol, 3-tertiobutyl-4-hydroxyanisole (3-BHA), 2-tertiobutyl-4-hydroxyanisole and 2,6,-di-tert-butyl-4-methylphenol.
11. A composition according to claim 9 , wherein the ratio in weight between the tocopherol and/or its derivatives or the tocotrienol and/or its derivatives and the colour stabiliser is comprised between 1 and 100.
12. A method for water treatment, sludge dewatering, papermaking process, agriculture, forming a cosmetic and detergency composition, textile process, or oil and gas process, comprising adding the water-soluble polymer of claim 1 to an aqueous solution.
13. A method for enhancing an aqueous solution, comprising adding to the solution the water-soluble polymer of claim 1 as a dispersant, coagulant, flocculant, thickener, grinding agent, drag reducer, superabsorbent, or retention aid.
14. Process for inhibiting the formation of vinyl acrylate resulting from a reaction between at least a 2-dimethylaminoethyl acrylate monomer and/or its salts and oxygen, comprising mixing said 2-dimethylaminoethyl acrylate monomer and/or its salts with a tocopherol and/or its derivatives, or a tocotrienol and/or its derivatives.
15. A water-soluble polymer according to claim 2 , wherein the quantity of tocopherol and/or its derivatives, or tocotrienol and/or its derivatives is comprised between 1 ppm and 10 000 ppm, based on the amount of 2-dimethylaminoethyl acrylate monomer and/or its salts.
16. A water-soluble polymer according to claim 15 , wherein the tocopherol and/or its derivatives, or the tocotrienol and/or its derivatives, is added to the 2-dimethylaminoethyl acrylate monomer and/or its salts after the synthesis of said 2-dimethylaminoethyl acrylate monomer and/or its salts.
17. A water-soluble polymer according to claim 16 , wherein the tocopherol and/or its derivatives, or the tocotrienol and/or its derivatives is added to the 2-dimethylaminoethyl acrylate monomer and/or its salts before the storage of said 2-dimethylaminoethyl acrylate monomers and/or its salts.
18. A water-soluble polymer according to claim 17 , wherein the 2-dimethylaminoethyl acrylate monomer is quaternized with methyl chloride.
19. A water-soluble polymer according to claim 18 , wherein the water-soluble polymer:
comprises at least 1 mol % of 2-dimethylaminoethyl acrylate monomer and/or its salts based on the total number of moles of monomer; and
has an average molecular weight by weight comprised between 50 000 g/mol and 30 000 000 g/mol.
20. A composition according to claim 10 , wherein the ratio in weight between the tocopherol and/or its derivatives or the tocotrienol and/or its derivatives and the colour stabiliser is comprised between 1 and 100.