Process for coating to obtain special surface effects

Abstract

A process for coating substrates to produce surfaces which have a textile-like texture; the process comprises the following steps: a) coating fibers with a polymer dispersion based on one or more polymers selected from the group of polyurethanes, polyester polyurethanes, polyesters or mixtures thereof, b) blending the coated fibers together with the polymer dispersion to form a coating material and applying the coating material onto the surface to be coated and c) curing the coating material thereby forming a coating on the surface of the substrate; also, the process according to the invention relates to a coating material which is applied onto the substrate surface, comprising A) 5 to 40 wt. % of the polymer dispersion basing on one or more polymers selected from the group polyurethane, polyester polyurethane and polyester, having a solids content of 25 to 90 wt. %, B) 0 to 35 wt. % of one or more cross-linking agents, selected from the group of formaldehyde condensation resins and polyisocyanates, C) 2 to 20 wt. % of fiber material, D) 0 to 20 wt. % of solvent, E) 5 to 35 wt. % of water, and optionally, F) 0.5 to 10 wt. % of additives conventionally used in connection with coatings, pigments and / or extenders.

Description

Background of the invention [0001] The present invention relates to a method of coating a substrate which results in a surface having a fabric-like texture. [0002] In order to produce textile or fiber effects on surfaces, it is known to treat fiber materials with binders to produce composite materials in which the fibers are mixed into a matrix. For example, DE-A 19921209 describes a thermoplastic composite material containing organic fibres, especially leather fibres, and a thermoplastic binder as matrix, in which the subsequent production of a polymer film by suitable processing methods can be carried out by thermal The molding process applies the polymer film to the surface of the substrate. [0003] The fibers can be mixed with a binder to form a nonwoven fiber sheet or a nonwoven fiber molding material. Such processes are described, for example, in WO95 / 30034 and WO96 / 16218, wherein organic or inorganic fibers are treated with a binder powder mixture. [0004] The me...

AI Technical Summary

Problems solved by technology

The use of non-woven fibers leads to the generation of dust and thus labor hygiene and environmental problems

Moreover, specific surface effects, such as specific textures, cannot be obtained with conventional adhesives