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US 5,847,037 AGranted
Mixtures, process for the production thereof and use thereof for coatings
AssigneeBayer Aktiengesellschaft
InventorsJan Mazanek, Karl-Heinz Kasler, Gebhard Wagner
Life of this patent
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Abstract
Novel mixtures containing in the anhydrous state at least one polysiloxane, at least one reactive extender, at least one unreactive pigment and/or an unreactive extender, at least one lamellar or fibrous solid, at least one reactive (oligo)silane, optionally together with further additives, to a production process and to the use thereof.
Claims12
A coating mixture produced by
- initially introducing about 30 to 50 wt. % of at least one reactive extender B, as an aqueous dispersion,
- adding 0 to about 5% of wetting agent G, as an additive, about 10 to 40 wt. % of at least one unreactive pigment or unreactive extender C, optionally adding a further quantity of B, wherein the total amount of all B added is at most about 50 wt. %, about 0.1 to 10 wt. % of at least one reactive (oligo)silane E and about 5 to 20 wt. % of at least one lamellar or fibrous extender D, which differs from B and C, with stirring, which is then continued for an additional 5 to 60 minutes, and then
- adding 0 to about 35 wt. % of at least one additive G and about 15 to 30 wt. % of at least one polysiloxane A with stirring;
- all wt. % amounts being based on total weight of mixture.
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A process for the preparation of a mixture which comprises
- initially introducing about 30 to 50 wt. % of at least one reactive extender B as an aqueous dispersion,
- adding 0 to about 5% of wetting agent G as an additive, about 10 to 40 wt. % of at least one unreactive pigment or unreactive extender C, optionally adding a further quantity of B, wherein the total of all B is at most about 50 wt. %, about 0.1 to 10 wt. % of at least one reactive (oligo)silane E and about 5 to 20 wt. % of at least one lamellar or fibrous extender D, which differs from B and C, with stirring and then, after all components have been added, stirring for an additional 5 to 60 minutes, and
- subsequently adding 0 to about 35 wt. % of at least one additive G and about 15 to 30 wt. % of at least one polysiloxane A with stirring;
- all wt. % amounts being based on total weight of mixture.
1 more element
Dependencies are inferred from the claim text.