Process for producing foamed wallpapers

A technology of foam coating and base material, applied in the field of preparation of foam wallpaper

Inactive Publication Date: 2014-02-05

HENKEL KGAA

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AI-Extracted Technical Summary

Problems solved by technology

Need to avoid those polymers that may cause...

Method used

[0048] The substrate prepared according to the method of the present invention comprises a flexible support material. A homogeneous foam-forming layer is arranged on one side of the carrier material. In a preferred embodiment, the substrate is formed from paper or a nonwoven material based on a fibrous material comprising cellulose. By using gas (especially air) as a blowing agent, the overall cost of the preparation method is reduced. There is no need to add expensive foam fillers to the coating.

[0050] Another advantage of t...

Abstract

The invention relates to a process for producing a foamed coating on a substrate in the form of a web, where the substrate is entirely or to some extent coated with a coating composition, the applied layer is dried at a temperature above 70°C, and the coating composition is applied in the form of foam, where an aqueous coating composition is used, comprising polymers selected from poly(meth)acrylates, maleate polymers or ethylene-vinyl acetate polymers, and the coating composition is foamed by an inert gas that has been introduced.

Application Domain

Special visual effect coatingsCovering/linings +3

Technology Topic

Cis-Butenedioic AcidChemistry +6

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Examples

Experimental program(1)

Example Embodiment

[0053] Example

[0054] Prepare a mixture of the following substances:

[0055]

[0056] The pigment is ground and homogenized in the dispersed phase. Adjust the pH to about 7.

[0057] The viscosity is about 3500mPas, 25°C (EN ISO2555, Brookfield viscometer).

[0058] The density is about 1.45g/cm 3.

[0059] The obtained mixture is processed in a foam generator using air as gas to obtain a foam; the ratio of coating agent to air = 55:45.

[0060] A spatula was used to obtain a 2 mm thick layer from the foam on a piece of paper (10 x 10 cm).

[0061] The resulting layer was dried in a circulating air oven at 130°C for 30 seconds.

[0062] A paper substrate with a dried layer is obtained; the layer thickness is about 1.8 mm. The surface is non-sticky and soft, and can be embossed.

PUM

Description & Claims & Application Information

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