Radiation-curable aqueous binder dispersions, their preparation and their use
AssigneeBASF SE
InventorsIngolf Buethe, Werner Loch
Life of this patent
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Abstract
A radiation-curable aqueous binder dispersion which comprises water and, dispersed therein, one or more prepolymers which contain from 0.01 to 1.0 mole of polymerizable carbon-carbon double bonds per 100 g of prepolymer and have a mean molecular weight of not less than 350 and a viscosity at 23.degree. C. of not less than 600 cp, as well as from 0.1 to 30 percent by weight, based on prepolymer, of one or more dispersants and from 0 to 20 percent by weight, based on prepolymer, of one or more photoinitiators. The binder dispersions according to the invention may be used as surface coatings for non-metallic and metallic substrates, and for bonding fiber webs.
Claims7
A radiation-curable aqueous binder dispersion, which essentially comprises
- (A) from 20 to 80 percent by weight of water,
- (B) from 80 to 20 percent by weight of one or more prepolymers which are dispersed in (A) and contain from 0.01 to 1.0 mole, per 100 g of prepolymer, of polymerizable carbon-carbon double bonds and have a mean molecular weight of not less than 350 and a viscosity, at 23.degree. C., of not less than 600 cp, the sum of the percentages of (A) and (B) being 100, together with
- (C) from 3 to 12 percent by weight, based on (B), of one or more dispersants, selected from the group consisting of polyvinylpyrrolidone and a copolymer of vinylpropionate or vinylacetate with vinylpyrrolidone, and
- (D) from 0 to 20 percent by weight, based on (B), of one or more photoinitiators.
Dependencies are inferred from the claim text.