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US 9,902,871 B2Granted
Water-emulsifiable isocyanates for coatings having an improved gloss
AssigneeBASF SE
InventorsAngelika Maria Steinbrecher, Karl Haeberle, Frederic Lucas
Life of this patent
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Abstract
The invention relates to new, water-emulsifiable isocyanates, to a process for preparing water-emulsifiable isocyanates, and to the use thereof.
Claims20
A water-emulsifiable polyisocyanate composition, comprising:
- (A) a polyisocyanate comprising at least one (cyclo)aliphatic diisocyanate,
- (B) a compound (B) comprising at least two isocyanate-reactive groups, and at least one group selected from the group consisting of a thioether group (—S—), a selanyl group (—Se—), a sulfoxide group (—S(═O)—), and a sulfone group (—S(═O)2—),
- (C) a compound comprising an isocyanate-reactive group and a dispersive group, and
- (D) optionally a solvent,
- wherein
- a ratio of NCO groups in (A) to isocyanate-reactive groups in (B) and (C) is from 5:1 to 100:1,
- an ethylene oxide group content, calculated as 44 g/mol, based on a sum of (A), (B), and (C), is at least 12 wt. %,
- an amount of component (C) is at least 5 and up to 25 wt. %, and
- the composition has a viscosity at 23° C. of from 2500 mPas to 12 000 mPas.
6 more elements
A water-emulsifiable polyisocyanate composition, comprising in at least partially reacted form:
- (A) a polyisocyanate comprising at least one (cyclo)aliphatic diisocyanate,
- (B) a compound (B) comprising at least two isocyanate-reactive groups, and at least one group selected from the group consisting of a thioether group (—S—), a selanyl group (—Se—), a sulfoxide group (—S(═O)—), and a sulfone group (—S(═O)2—), and
- (C) a compound comprising an isocyanate-reactive group and a dispersive group, wherein
- a ratio of NCO groups in (A) to isocyanate-reactive groups in (B) and (C) is from 5:1 to 100:1,
- an ethylene oxide group content, calculated as 44 g/mol, based on a sum of (A), (B), and (C), is at least 12 wt. %,
- an amount of component (C) is at least 5 and up to 25 wt. %, and
- the composition has a viscosity at 23° C. of from 2500 mPas to 12 000 mPas.
4 more elements
Dependencies are inferred from the claim text.