Solventless two-component strippable lacquer for metal surfaces

A solvent-free, two-component coating for metal surfaces comprising components A and B

• wherein component A comprises
• from 5 to 20% by weight of an optionally substituted aromatic diamine;
• from 0.1 to 5% by weight of a dehydrator;
• from 0.01 to 1% by weight of an accelerator based on tertiary amines;
• from 0.01 to 1% by weight of an accelerator based on organic tin compounds;
• and a polyether polyol based on poly(oxyalkylene) glycols;
• and wherein component B comprises from 40 to 60% by weight of an aromatic diisocyanate based on a phenylene or toluylene diisocyanate, and
• from 40 to 60% by weight of a polyether polyol based poly(oxyalkylene) glycols;
• wherein said coating provides controlled adhesion when applied to a metal surface such that is strippable from the metal surface to which it is applied;
• wherein the curing time is less than 30 minutes and the curing temperature is between 10 and 40° C.

A method for the surface coating of metal parts comprising applying a solvent-free, two-component, controlled adhesion strippable coating for metal surfaces consisting essentially of components A and B

• wherein component A consists essentially of
• from 5 to 20% by weight of an optionally substituted aromatic diamine;
• from 0.1 to 5% by weight of a dehydrator;
• from 0.01 to 1% by weight of an accelerator based on tertiary amines;
• from 0.01 to 1% by weight of an accelerator based on organic tin compounds;
• and a polyether polyol based on poly(oxyalkylene) glycols,
• and wherein component B consists essentially of from 40 to 60% by weight of an aromatic diisocyanate based on a phenylene or toluylene diisocyanate, and
• from 40 to 60% by weight of a polyether polyol based poly(oxyalkylene)glycol to a metal surface to be protected.

A solvent-free, two component coating for metal surfaces consisting essentially of components A and B

• wherein component A consists essentially of
• from 5 to 20% by weight of an optionally substituted aromatic diamine;
• from 0.1 to 5% by weight of a dehydrator;
• from 0.01 to 1% by weight of an accelerator based on tertiary amines;
• from 0.01 to 1% by weight of an accelerator based on organic tin compounds;
• and a polyether polyol based on poly(oxyakylene) glycols;
• and wherein component B consists essentially of from 40 to 60% by weight of an aromatic diisocyanate based on a phenylene or toluylene diisocyanate, and
• from 40 to 60% by weight of a polyether polyol based poly(oxyalkylene) glycols;
• wherein said coating provides controlled adhesion when applied to a metal surface such that is strippable from the metal surface to which it is applied.