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US 8,709,544 B2Granted
Catalysts for polyurethane coating compounds
AssigneeBASF SE
InventorsOliver Neu, Michael Siemer, Ansgar Gereon Altenhoff, Harald Schaefer, Angelika Maria Steinbrecher
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Abstract
The present invention relates to coating compositions for polyurethane coating materials that feature new catalysts.
Claims20
A method of coating a substrate, the method comprising:
- applying to the substrate in a desired thickness at least one coating composition,
- optionally drying the at least one coating composition by at least partly removing a volatile constituent, and
- curing the at least one coating composition,
- wherein
- the at least one coating composition comprises:
- (A) a polyisocyanate comprising, in reacted form, a monomeric isocyanate,
- (B) a compound comprising at least two isocyanate-reactive groups, and having a number-average molecular weight Mn of at least 1000 g/mol and an OH number of 40 to 350 mg KOH/g,
- (C) an imidazolium salt as a urethanization catalyst,
- (D) optionally a solvent,
- (E) optionally a urethanization catalyst other than (C), and
- (F) optionally another coating component or additive;
- and
- the imidazolium salt (C) has a formula
- wherein:
- R1 and R3 each independently are an organic radical comprising 1 to 20 C atoms,
- R2, R4 and R5 each independently are an H atom or an organic radical comprising up to 20 C atoms, and
- A− is an anion.
14 more elements
A coating material, comprising
- (A) a polyisocyanate comprising, in reacted form, a monomeric isocyanate,
- (B) a compound comprising at least two isocyanate-reactive groups, and having a number-average molecular weight Mn of at least 1000 g/mol and an OH number of 40 to 350 mg KOH/g,
- (C) an imidazolium salt as a urethanization catalyst,
- (D) optionally a solvent,
- (E) optionally a urethanization catalyst other than (C), and
- (F) optionally another coating component or additive,
- wherein the imidazolium salt (C) has a formula
- wherein:
- R1 and R3 each independently are an organic radical comprising 1 to 20 C atoms,
- R2, R4 and R5 each independently are an H atom or an organic radical comprising up to 20 C atoms, and
- A− is an anion.
8 more elements
A premix, comprising:
- one selected from the group consisting of (A) and (B), wherein (A) is at least one polyisocyanate comprising, in reacted form, a monomeric isocyanate, and (B) is at least one compound comprising at least two isocyanate-reactive groups, and having a number-average molecular weight Mn of at least 1000 g/mol and an OH number of 40 to 350 mg KOH/g,
- (C) an imidazolium salt as a urethanization catalyst,
- (D) optionally a solvent,
- (E) optionally a urethanization catalyst other than (C), and
- (F) optionally another coating component or additive,
- wherein
- the imidazolium salt (C) has a formula
- wherein:
- R1 and R3 each independently are an organic radical comprising 1 to 20 C atoms,
- R2, R4 and R5 each independently are an H atom or an organic radical comprising up to 20 C atoms, and
- A− is an anion.
8 more elements
Dependencies are inferred from the claim text.