摘要:
The use of linear and/or branched polyethylene oxide homopolymers, polypropylene oxide homopolymers and/or polyethylene/polypropylene oxide copolymers with randomly distributed ethylene oxide and propylene oxide units, which may be partly or completely etherified with C1-C4-alkanols, with an average molecular weight of more than 1000 to 8000, for reducing the clear lacquer wetting limits during two-layered lacquering with aqueous base lacquer/clear lacquer and suitable base lacquers.
摘要:
Aqueous binder dispersions, which may be produced by 1) mixing 50 to 95 solids pbw (parts by weight) of non-aqueous polyurethane resin with 5 to 50 solids pbw of non-aqueous aminoplast resin, wherein the total of the solids pbw amounts to 100 and wherein polyurethane resin and aminoplast resin are inert towards each other, 2) converting the resultant non-aqueous mixture into an aqueous dispersion by mixing with water, and 3) subjecting the resultant aqueous dispersion to conditions which give rise to condensation reactions of the aminoplast resin present in the dispersion particles, until a tetrahydrofuran-insoluble binder fraction of the dispersion solids of 20 to 90 wt. % is obtained.
摘要:
Aqueous binders containing 0.2 to 7 wt-% of layered silicate, relative to binder solids content, obtainable by converting a homogeneous mixture of layered silicate and non-aqueous binder (precursor) into the aqueous phase by mixing with water and, in the case of a binder precursor, concluding synthesis of the binder in the aqueous phase.
摘要:
Pigment preparations, having a solid content of 10 to 60 wt-%, obtainable by mixing together, in the presence of at least one water-miscible organic solvent, pigments coated with a silicon-oxygen-matrix with at least one resin having carboxyl groups sufficient to provide an acid value of 10 to 100 mg KOH/g resin and having an number average molecular mass of 500 to 5000, wherein the ratio of pigment to resin is in the range of 1:0.3 to 1:10, can be used for the preparation of water-borne effect base coats with shear stability.