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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Need to avoid those polymers that may cause health problems during preparation and use

Method used

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  • Process for producing foamed wallpapers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0054] Prepare a mixture of:

[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] Density is about 1.45g / cm 3 .

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

[0060] A 2 mm thick layer was obtained from the foam on a sheet of paper (10x10 cm) using a doctor blade.

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

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

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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.

Description

technical field [0001] The invention relates to a method of applying a coating to a flexible web-shaped substrate, which method results in a foamed layer in the dry state. Aqueous coating agents which can be applied in the form of foams are also described. Background technique [0002] Foam coated wallpaper is very common. In one production method, a PVC layer is produced on a carrier substrate and the coating is then foamed using a blowing agent. Thus, foaming starts after layer formation. JP56028933 describes a PVC paste comprising azodicarbonamide as blowing agent. After application and while still warm, a foamed layer can be obtained from this composition. [0003] NL7215102 describes a multilayer substrate comprising a gel layer and an acrylate / PVC layer as outer layers. A base layer formed of a crosslinked methylolacrylamide / PVC mixture as polymer and pigment is applied as foam layer. [0004] Also known are paints suitable for fire protection which contain nonfl...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08J9/30D06N7/00D21H19/66E04F13/00D21H21/56
CPCD21H25/06C08J2331/04D21H19/66C08J2333/06D21H19/20C08J2203/06D06N7/0002D21H21/56E04F13/002C08J9/30C08J9/122D06N2205/045C09D131/04
Inventor A·施米特D·韦泽曼T·克拉森M·埃克斯L·亨德里克斯H·比兴
Owner HENKEL KGAA
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