Low-temperature film-forming latex based on hydrophobic polymers having a core/shell structure without coalescents

Latex containing no coalescents or volatile organic compounds, forming a film by evaporation at a temperature of less than 40° C., wherein the latex is based on hydrophobic polymer particles having a core/shell structure and consisting of:

• 70 to 90% by weight of at least one polymer with a soft character having a Tg of less than 20° C., forming the core;
• and
• 10 to 30% by weight of at least one polymer with a hard character having a Tg of greater than 50° C., forming the shell, wherein the shell is formed by emulsion polymerization of at least one first monomer, the at least one first monomer being a hydrophobic monomer selected from the group consisting of:
• C1-8(meth)acrylic acid esters,
• styrene,
• chloromethylstyrene,
• alpha-methylstyrene,
• conjugated dienes, and
• vinyl chloride;
• further wherein the core is more hydrophobic than the shell.