An Acrylic Polyester Resin and An Aqueous Coating Composition Containing the Same

An aqueous coating composition, the aqueous coating composition comprising:

• a) an acrylic polyester resin, obtainable by grafting an acrylic polymer with a polyester material, the polyester material being obtainable by polymerizing:
• i) a polyacid component, with
• ii) a polyol component, including
• 2,2,4,4-tetraalkylcyclobutane-1,3-diol
• wherein one of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted with the polyester material via the use of said functionality,
• b) a crosslinking material.

A metal packaging container coated on at least a portion thereof with a coating, the coating being derived from an aqueous coating composition, the aqueous coating composition comprising:

• a) an acrylic polyester resin, obtainable by grafting an acrylic polymer with a polyester material, the polyester material being obtainable by polymerizing:
• i) a polyacid component, with
• ii) a polyol component, including
• 2,2,4,4-tetraalkylcyclobutane-1,3-diol
• wherein one of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted with the polyester material via the use of said functionality,
• b) a crosslinking material.

A packaging coated on at least a portion thereof with a coating, the coating being derived from an aqueous coating composition, the aqueous coating composition comprising:

• a) an acrylic polyester resin, obtainable by grafting an acrylic polymer with a polyester material, the polyester material being obtainable by polymerizing:
• i) a polyacid component, with
• ii) a polyol component, including
• 2,2,4,4-tetraalkylcyclobutane-1,3-diol
• wherein one of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted with the polyester material via the use of said functionality,
• b) a crosslinking material.

A method of forming an acrylic modified polyester resin, the method comprising polymerizing an acrylic modification polymer in the presence of a polyester material, the polyester material being obtainable by polymerizing

• i) a polyacid component, with
• ii) a polyol component, including
• 2,2,4,4-tetraalkylcyclobutane-1,3-diol
• wherein one of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted onto the polyester material via the use of said functionality.

A method of preparing an aqueous coating composition, the method comprising dispersing an acrylic modified polyester resin and a crosslinking material in an aqueous medium, the acrylic modified polyester resin being obtainable by grafting an acrylic polymer onto a polyester material, the polyester material being obtainable by polymerizing:

• i) a polyacid component, with
• ii) a polyol component, including
• 2,2,4,4-tetraalkylcyclobutane-1,3-diol
• wherein one of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted onto the polyester material via the use of said functionality.

A method of coating at least a portion of a metal packaging container, the method comprising applying an aqueous coating composition to a metal packaging composition, the aqueous coating composition comprising an acrylic modified polyester resin and a crosslinking material, the acrylic modified polyester resin being obtainable by grafting an acrylic polymer onto a polyester material, the polyester material being obtainable by polymerizing:

• i) a polyacid component, with
• ii) a polyol component, including
• 2,2,4,4-tetraalkylcyclobutane-1,3-diol
• wherein one of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted onto the polyester material via the use of said functionality, and
• curing the aqueous coating composition to form a coating.

A method of coating at least a portion of a packaging, the method comprising applying an aqueous coating composition to a packaging, the aqueous coating composition comprising an acrylic modified polyester resin and a crosslinking material, the acrylic modified polyester resin being obtainable by grafting an acrylic polymer onto a polyester material, the polyester material being obtainable by polymerizing:

• i) a polyacid component, with
• ii) a polyol component, including
• 2,2,4,4-tetraalkylcyclobutane-1,3-diol
• wherein one of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted onto the polyester material via the use of said functionality, and
• curing the aqueous coating composition to form a coating.