ADDING NON-IONOGENIC SURFACE-ACTIVE SUBSTANCES TO WATER-SOLUBLE BLOCK COPOLYMERS TO INCREASE STABILITY OF COPOLYMERS IN AQUEOUS SOLUTIONS CONTAINING SALT AND / OR SURFACE-ACTIVE SUBSTANCES

摘要

1. An aqueous composition comprising a mixture! water, ! about 0.05-10 wt.% of the total weight of at least one water-soluble block copolymer, which is water-soluble in nature and containing hydrophobic units and at least one block, mainly hydrophobic in nature,! approximately 0.01-10 wt.% of the total mass of nonionic surfactant, with an HLB value of less than 12, and! approximately 0.1-20 wt.% of the total mass of at least one inorganic salt selected from the group consisting of monovalent ions, divalent ions and trivalent ions. ! 2. The composition according to claim 1, where the predominantly hydrophobic block has hydrophilic units in an amount equal to between 0 and less than 33 wt.%, Relative to the total mass of the links of the hydrophobic block. ! 3. The composition according to claim 1, where the block polymer, water-soluble by nature, contains hydrophobic units in an amount of less than 70 wt.% Relative to the total mass of the units of the block, water-soluble by nature. ! 4. The composition according to claim 1, where the block, mainly hydrophobic in nature, is formed by polymerization of a mixture of monomers containing at least 80 wt.% Styrene. ! 5. The composition according to claim 1, where the mass ratio of blocks, mainly hydrophilic in nature, to blocks, mainly hydrophobic in nature, is between 95/5 and 20/80. ! 6. The composition according to claim 1, where the copolymer is in a concentration between 0.1 and 10 wt.%. ! 7. The composition according to claim 1, where the nonionic surfactant has an HLB of from 2 to 10.! 8. The composition according to claim 1, where the nonionic surfactant is contained in a concentration between 0.06 and 5 wt.%. ! 9. The composition according to claim 1, where the nonionic