Patent ID: 11912797
Assignee: SOCIETE D'EXPLOITATION DE PRODUITS POUR LES INDUSTRIES CHIMIQUES SEPPIC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 15:
16. A self-invertible inverse latex of a crosslinked anionic polyelectrolyte (P) comprising, per 100 mol %:
(a1)—a proportion of greater than or equal to 30 mol % and less than or equal to 100 mol %, of monomer units derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid or partially or totally salified form; and
(a2)—a proportion of greater than 0 mol % and less than or equal to 1 mol %, of monomer units derived from at least one diethylenic or polyethylenic crosslinking monomer (AR);
the sum of said molar proportions of monomer units according to a1) and a2) being equal to 100 mol %;
said self-invertible inverse latex being an emulsion of water-in-oil type (E) comprising, per 100% of its mass:
a)—from 10% by mass to 90% by mass of said crosslinked anionic polyelectrolyte (P);
b)—from 5% by mass to 50% by mass of a fatty phase consisting of at least one oil (H);
c)—from 1% by mass to 50% by mass of water;
d)—from 0.5% by mass to 10% by mass of an emulsifying system of water-in-oil type (S1); and
e)—from 2% by mass to 10% by mass of an emulsifying system of oil-in-water type (S2);
the sum of the mass proportions of compounds according to a), b), c), d) and e) being equal to 100% by mass;
wherein said emulsifying system of oil-in-water type (S2) comprises, per 100% of its mass:
f)—a proportion of greater than or equal to 50% by mass and less than or equal to 100% by mass of a composition (Ce) comprising, per 100% of its mass:
e1)—from 10% by mass to 60% by mass of at least one compound of formula (I):

HO—[CH2—CH(OH)—CH2—O]n—H  (I)

in which n represents an integer greater than or equal to 1 and less than or equal to 15;
e2)—from 40% by mass to 90% by mass of at least one compound of formula (II):

R1—(C═O)—[O—CH2—CH(OH)—CH2]p—OH  (II), and

in which p, which is different from or identical to n, represents an integer greater than or equal to 1 and less than or equal to 15; and in which the group R1—(C═O)— represents a saturated or unsaturated, linear or branched aliphatic radical including from 6 to 22 carbon atoms;
the sum of the mass proportions of compounds according to e1) and e2) being equal to 100% by mass.