High acid aqueous nanocomposite dispersions

A binder comprising the aqueous nanocomposite dispersion of claim.

A polymer clay nanocomposite composition, the nanocomposite composition comprising:

• a polymer core polymerized from an aqueous dispersion comprising at least one clay, an ethylenically unsaturated monomer, and optionally at least one surfactant;
• and
• a polymer shell that is associated with said core and polymerized from a monomer mixture comprising at least 10 weight percent of an acid containing monomer within the monomer mixture, optionally at least one clay, and optionally a surfactant, wherein the ratio of the polymer core to the polymer shell is 90:10 to 10:90.

A polymer clay nanocomposite composition, the nanocomposite composition comprising:

• a polymer core polymerized from a monomer mixture comprising at least 10 weight percent of an acid containing monomer within the monomer mixture, optionally at least one clay, and optionally at least one surfactant;
• and
• a polymer shell that is associated with said core and polymerized from an aqueous dispersion comprising at least one clay, at least one ethylenically unsaturated monomer, and optionally at least one surfactant, wherein the ratio of the polymer core to the polymer shell is 90:10 to 10:90.

A polymer clay nanocomposite composition, the nanocomposite composition comprising:

• a polymer core polymerized from an aqueous dispersion comprising at least one clay, at least 10 weight percent of an acid containing monomer within the aqueous dispersion, and optionally at least one surfactant;
• and
• a polymer shell that is associated with said core and polymerized from a monomer mixture comprising optionally at least one clay, at least one ethylenically unsaturated monomer, and optionally at least one surfactant, wherein the ratio of the polymer core to the polymer shell is 90:10 to 10:90.

A polymer clay nanocomposite composition, the nanocomposite composition comprising:

• a polymer core polymerized from a monomer mixture comprising at least one ethylenically unsaturated monomer, optionally at least one clay, and optionally at least one surfactant;
• and
• a polymer shell that is associated with said core and polymerized from an aqueous dispersion comprising at least 10 weight percent of an acid containing monomer within the aqueous dispersion, at least one clay, an ethylenically unsaturated monomer, and optionally at least one surfactant, wherein the ratio of the polymer core to the polymer shell is 90:10 to 10:90.

A process for preparing an aqueous polymer clay nanocomposite dispersion, comprising:

• admixing an aqueous emulsion polymer comprising polymerized units of at least one ethylenically unsaturated monomer wherein at least 10 weight percent or greater of the monomer is an acid containing monomer and optionally at least one polyunsaturated monomer with an aqueous dispersion comprising at least one clay;
• and
• neutralizing said acid.

The process according to 45 wherein the admixing step occurs prior to the neutralization of the aqueous emulsion polymer.