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US 8,802,759 B2Granted
Binders for coatings, having high water vapor permeability
AssigneeBASF SE
InventorsAlexandre Terrenoire, Roelof Balk, Harm Wiese, Arno Tuchbreiter, Timothy Francis, Hans-Werner Schmidt, Andreas Bernet
Life of this patent
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Abstract
The present invention relates to binders based on polymer dispersions and terephthalic bisamides with high water vapor transmission, and also to their use in formulations, especially for wood coatings.
Claims20
An aqueous polymer dispersion P, comprising:
- 0.1% to 10% by weight of at least one additive of formula (I)
- R1, R2, R3, R4, R5, and R6 are H or C1-Cn′ alkyl, and R1 to R6 are either identical or different,
- X and Y are Cl, Br, or I, and
- each of n, n′, and m individually represents an integer of 1-8, and
- wherein the dispersion is obtained by free-radical aqueous emulsion polymerization of a monomer mixture comprising
- a) 45 to 70 parts by weight of at least one first monomer whose homopolymer has a glass transition temperature Tg<20° C.,
- b) 30 to 55 parts by weight of at least one second monomer whose homopolymer has a glass transition temperature Tg>50° C., and
- c) 0 to 30 parts by weight of at least one third monomer.
5 more elements
Dependencies are inferred from the claim text.