Water soluble saline aqueous dispersion of copolymers based on cationic monomers, method for making same and uses thereof

A saline aqueous dispersion of a water-soluble copolymer obtained from a monomer compositions comprising, per 100 parts by moles:

• (1) from 0.10 to 65 parts by moles of at least one compound of formula (I):
• 15
• in which:
• R1 represents H or —CH3;
• R2 represents —CH3;
• —C2H5;
• —C3H7 or —C4H9;
• and
• the compound (I) is optionally quaternized on one of the nitrogens, which is symbolized by the fact that the R3, X− and + entities associated with this nitrogen are between square brackets;
• when the compound (I) is quaternized on just one nitrogen, R3 and X− have the following meanings:
• (1) R3 represents —CH2C6H5;
• and X− represents Cl− or CH3OSO3−;
• or
• (2) R3 represents —(CH2)pCH3 with p an integer from 3 to 11;
• and X− represents Br− or I−;
• when the compound (I) is quaternized on both nitrogens, the two X− entities can be identical or different and the two R3 entities can be identical or different, in which case:
• (3) R3 represents —CH2—C6H5;
• and X− represents Cl−;
• or
• (4) R3 represents —(CH2)pCH3 with p an integer from 3 to 11;
• and X− represents Br− or I−;
• (5) among the compounds (I) quaternized on both nitrogens and having the two R3 entities different, if one of the R3 entities represents —CH3, —C2H5 or —C3H7;
• and X− represents Cl− or CH3OSO3−, the other represents —CH2C6H5, the associated X− representing Cl−, or represents —(CH2)pCH3 with p an integer from 3 to 11, the associated X− representing Br− or I−;
• (2) from 0.5 to 95 parts by moles of at least one monomer chosen from:
• (2a) those of the formula (II):
• 16
• in which:
• R8 represents H or —CH3;
• A1 represents —O— or —NH—;
• B1 represents —CH2—CH2—, —CH2—CH2—CH2— or —CH2—CHOH—CH2—;
• R9 and R10 each represent —CH3 or —CH2CH3;
• R11 represents —(CH2)o—CH3, with o an integer from 3 to 9, or
• 17
• and
• X1− represents a monovalent ion;
• and
• (2b) those of formula (III):
• 18
• in which:
• R12 represents H or —CH3;
• (3) from 0 to 95 parts by moles of at least one monomer of formula (IV):
• 19
• in which:
• R represents H or —CH3;
• R14 and R15, which are identical or different, each independently represent H or C1-5 alkyl;
• (4) from 0 to 95 parts by moles of at least one monomer of formula (V):
• 20
• in which:
• R16 represents H or —CH3;
• A2 represents —O— or —NH—;
• B2 represents —CH2CH2—, —CH2CH2CH2— or —CH2CHOHCH2—;
• R17 and R18 each independently represent —CH3 or —CH2CH3;
• R19 represents H, —CH3 or —CH2CH3;
• X2− represents a monovalent anion;
• (5) from 0 to 95 parts by moles of at least one monomer of the formula (VI):
• 21
• in which:
• R1 represents H or —CH3;
• R2 represents —CH3;
• —C2H5 or —C3H7;
• and
• the compound (IV) is optionally quaternized on one of the nitrogens, which is symbolized by the fact that the R3, X− and + entities associated with this nitrogen are between square brackets;
• R3 represents —CH3, —C2H5 or —C3H7;
• and
• X− represents Cl− or CH3OSO3—;
• and
• when the compound (VI) is quaternized on both nitrogens, the two X− entities can be identical or different and the two R3 entities can be identical or different;
• and
• (6) from 0 to 50 parts by moles of at least one anionic monomer chosen from carboxylic acids comprising ethylenic unsaturation, sulfonic acids comprising ethylenic unsaturation, sulfuric acids comprising ethylenic unsaturation and the derivatives of these acids.