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Gypsum plaster-based material containing an EDTA metal complex

A technology of metal complexes, gypsum, applied in the field of plasterboard for interior decoration, which can solve the problems of low performance level, expensive, etc.

Inactive Publication Date: 2016-08-31
SAINT GOBAIN PLACO SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, attempts to replace these resins with other VOC-free items have been in vain, as the proposed replacement resins are more expensive and the products obtained have lower performance levels

Method used

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  • Gypsum plaster-based material containing an EDTA metal complex
  • Gypsum plaster-based material containing an EDTA metal complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a) Manufacture of gypsum-based materials

[0037] 995 g of calcium sulfate hemihydrate, 5.2 g of starch, 0.1 g of ground gypsum, 1.2 g of zinc-EDTA complex (sold by the company Synthron) and 850 g of water were introduced into a mixer.

[0038] The mixture was stirred during 60 seconds to obtain a slurry.

[0039] The slurry was poured into a brass mold (250mm x 200mm) which was internally covered on its lower face with paper and then a second sheet of paper cut to the size of the mold was applied over the slurry.

[0040] Once agglomerated, the plasterboard is removed from the mold. It is then dried in an oven with an atmosphere saturated with water at 180°C until 80% of the water has been removed, at 100°C until 95% of the water has been removed and at 40°C Set aside for 24 hours.

[0041] Package the board in a UV-resistant airtight bag.

[0042] As a comparison, panels without zinc-EDTA complex (comparative example) were prepared under the same conditions.

[0...

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Abstract

The invention relates to a gypsum plaster-based material, in particular a gypsum plasterboard intended for the interior decoration of dwellings, containing an EDTA metal complex. The invention relates to the use of said material in order to reduce the amount of volatile organic compounds in the atmosphere inside dwellings, offices or public buildings.

Description

technical field [0001] The present invention relates to a gypsum-based material suitable for reducing the amount of volatile organic compounds present in ambient air, more particularly gypsum boards for the interior finishing of residential buildings. Background technique [0002] Very different composite materials are commonly used in the field of construction and assembly of buildings, especially dwellings or offices or public buildings (museums, schools, cinemas, concert halls, etc.). Some of these materials, such as acoustic and / or thermal insulation, wood panels, and decorative and furniture elements, use adhesives, paints and varnishes based on resins that contain or release volatile organic compounds over time. These compounds are present in ambient air, and even though their amounts appear to be low, in the long run they can bother and even damage the health of individuals exposed thereto. [0003] In recent years, the proportion of volatile organic compounds in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B28/14C04B111/00
CPCC04B28/14C04B2111/00025C04B2111/00456C04B2111/0062C04B24/123C04B14/022C04B14/047C04B20/0048C04B2103/12C04B2103/40C04B2103/63C04B2103/65C04B2103/67C04B22/128C04B22/143C04B22/147C04B24/14C04B24/16C04B24/38C04B24/42C04B11/26C04B14/38C04B16/12C04B24/405C04B26/285C04B2103/42C04B28/145C04B24/383C08L3/02C08L83/04
Inventor K·楚达C·德马蒂厄-罗埃尔特根
Owner SAINT GOBAIN PLACO SAS
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