Selectively strippable intermediate coatings and methods of use

A multi-layer coating comprising:

• a first coating;
• a second coating;
• and
• an intermediate coating disposed between the first coating and second coating, wherein the intermediate coating is deposited from a solvent borne coating composition comprising an organic solvent and at least one amine-terminated polyamide dispersed therein having the structure of Formula (I) or Formula (II):
• wherein
• each A is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• each B is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• and
• p is an integer chosen such that the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons
• and wherein the volatile organic content of the coating composition is less than 700 g/L.

A method of forming a multi-layer coating comprising:

• applying a curable first coating to a substrate;
• drying the first coating;
• applying an intermediate coating to the first coating;
• drying the intermediate coating;
• and
• applying a curable top coat to the intermediate coating;
• wherein the intermediate coating comprises a solvent borne coating composition comprising an organic solvent and at least one amine-terminated polyamide dispersed therein, wherein the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons, wherein the at least one amine-terminated polyamide has the structure of Formula (I):
• wherein
• each A is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• each B is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• and
• p is an integer chosen such that the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons, wherein the solvent borne coating composition is characterized by a volatile organic content less than 700 g/L.

A method of overcoating a base coat with a curable top coat comprising:

• applying an intermediate coating to the base coat;
• at least drying the intermediate coating;
• applying a top coat to the intermediate coating;
• and
• curing the top coat,
• wherein the intermediate coating facilitates removing the top coat from the base coat by a stripper;
• wherein the intermediate coating comprises a solvent borne coating composition comprising an organic solvent and at least one amine-terminated polyamide dispersed therein, wherein the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons, wherein the at least one amine-terminated polyamide has the structure of Formula (I):
• wherein
• each A is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• each B is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• and
• p is an integer chosen such that the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons, wherein the solvent borne coating composition is characterized by a volatile organic content less than 700 g/L.

A method of treating a substrate having a cured base coat to facilitate removal by a stripper of a subsequently applied top coat, comprising applying an intermediate coating to the cured base coat;

• wherein the intermediate coating comprises a solvent borne coating composition comprising an organic solvent and at least one amine-terminated polyamide dispersed therein, wherein the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons, wherein the at least one amine-terminated polyamide has the structure of Formula (I):
• wherein
• each A is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• each B is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• and
• p is an integer chosen such that the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons, wherein the solvent borne coating composition is characterized by a volatile organic content less than 700 g/L.

A multi-layer coating comprising:

• a first coating;
• a second coating;
• and
• an intermediate coating disposed between the first coating and second coating, wherein the intermediate coating comprises a film-forming resin consisting essentially of an epoxy curing agent and an amine-terminated polyamide having the structure of Formula (I) or Formula (II):
• wherein
• each A is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• each B is independently chosen from C2-12 alkylene, substituted C2-12 alkylene, C2-12 heteroalkylene, substituted C2-12 heteroalkylene, C5-12 arylene, substituted C5-12 arylene, C5-12 heteroarylene, substituted C5-12 heteroarylene, C5-12 cycloalkylene, substituted C5-12 cycloalkylene, C5-12 heterocycloalkylene, substituted C5-12 heterocycloalkylene, C6-24 cylcloalkylalkylene, substituted C6-24 cycloalkylalkylene, C6-24 heterocycloalkylalkylene, substituted C6-24 heterocycloalkylalkylene, C6-24 arylalkylene, substituted C6-24 arylalkylene C6-24 heteroarylalkylene, and substituted C6-24 heteroarylalkylene;
• and
• p is an integer chosen such that the number average molecular weight of the at least one amine-terminated polyamide ranges from 500 Daltons to 100,000 Daltons.