초록 ▼

The invention relates to levelling agents for surface coatings having a weight-average molecular weight of from 5000 to 100,000. The levelling agent is a branched polymer comprising a free-radically or ionically polymerized base molecule into which macromonomeric units containing at one end a monome

The invention relates to levelling agents for surface coatings having a weight-average molecular weight of from 5000 to 100,000. The levelling agent is a branched polymer comprising a free-radically or ionically polymerized base molecule into which macromonomeric units containing at one end a monomeric unit which has an ethylenically unsaturated bond and possessing a weight-average molecular weight of from 1000 to 30,000 have been incorporated by free-radical or ionic copolymerization, the weight fraction of the macromonomeric units, based on the total weight of the branched polymer, being from 1 to 60% by weight. The invention further relates to the use of appropriate polymers as levelling agents for coating formulations and to coating formulations comprising the levelling agents of the invention.

대표청구항 ▼

The invention relates to levelling agents for surface coatings having a weight-average molecular weight of from 5000 to 100,000. The levelling agent is a branched polymer comprising a free-radically or ionically polymerized base molecule into which macromonomeric units containing at one end a monome

The invention relates to levelling agents for surface coatings having a weight-average molecular weight of from 5000 to 100,000. The levelling agent is a branched polymer comprising a free-radically or ionically polymerized base molecule into which macromonomeric units containing at one end a monomeric unit which has an ethylenically unsaturated bond and possessing a weight-average molecular weight of from 1000 to 30,000 have been incorporated by free-radical or ionic copolymerization, the weight fraction of the macromonomeric units, based on the total weight of the branched polymer, being from 1 to 60% by weight. The invention further relates to the use of appropriate polymers as levelling agents for coating formulations and to coating formulations comprising the levelling agents of the invention. der-based coating composition as set forth in claim 1 wherein said functional group of said resin (A)(I) is selected from the group consisting of epoxy functional groups, carboxy functional groups, hydroxy functional groups, and combinations thereof. 53. A powder-based coating composition as set forth in claim 1 wherein said cross-linking agent (A)(II) of said powder-based binder (A) is selected from the group consisting of aminoplasts, blocked isocyanates, polycarboxylic acids, acid anhydrides, polyamines, and combinations thereof. 54. A substrate having at least one surface that has been coated with the powder-based coating composition as set forth in claim 1. 55. A method of coating a substrate to produce the second color effect upon application of the film layer of the powder-based coating composition to the substrate, said method characterized by using the powder-based coating composition as set forth in claim 1. 56. A powder-based coating composition as set forth in claim 1 wherein said inorganic coating (B)(I) and said pigment substrate (B)(I) of said color effect-providing pigment (B) interact with the first color effect of the substrate such that the second color effect is different from the first color effect at least by ΔL 20.0, Δa 10.0, and Δb 15.0 as measured according to CIELab color space. 57. A powder-based coating composition as set forth in claim 1 wherein said coating composition is a powder clearcoat applied on the substrate to produce the second color effect. 58. A powder-based coating composition as set forth in claim 1 wherein the interaction of said inorganic coating (B)(II) and said pigment substrate (B)(I) with the first color effect of the substrate to produce the second color effect is further defined as interference of light waves that establishes angle-dependent color and lightness effects to achieve the second color effect. 59. A powder-based coating composition as set forth in claim 1 wherein the interaction of said inorganic coating (B)(II) and said pigment substrate (B)(I) with the first color effect of the substrate to produce the second color effect is further defined as absorption of light waves that establishes angle-dependent color and lightness effects to ach