WO2026057143A1 - Procédé de préparation de plaques de plâtre présentant une demande en eau réduite et/ou une résistance améliorée à l'arrachement des clous - Google Patents

Procédé de préparation de plaques de plâtre présentant une demande en eau réduite et/ou une résistance améliorée à l'arrachement des clous

Info

Publication number
WO2026057143A1
WO2026057143A1 PCT/EP2024/025271 EP2024025271W WO2026057143A1 WO 2026057143 A1 WO2026057143 A1 WO 2026057143A1 EP 2024025271 W EP2024025271 W EP 2024025271W WO 2026057143 A1 WO2026057143 A1 WO 2026057143A1
Authority
WO
WIPO (PCT)
Prior art keywords
slurry
mixer
gypsum
calcium sulfate
accelerator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/025271
Other languages
English (en)
Inventor
Stergios KARAKOUSSIS
Carmen STEELAND
Lothar Scheller
Apostolos KAMPANAS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knauf Gips KG
Original Assignee
Knauf Gips KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knauf Gips KG filed Critical Knauf Gips KG
Priority to PCT/EP2024/025271 priority Critical patent/WO2026057143A1/fr
Publication of WO2026057143A1 publication Critical patent/WO2026057143A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/141—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing dihydrated gypsum before the final hardening step, e.g. forming a dihydrated gypsum product followed by a de- and rehydration step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • C04B2111/0062—Gypsum-paper board like materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

La présente invention concerne des procédés de préparation d'articles en plâtre et en particulier de plaques de plâtre qui sont préparées à partir d'une pâte de sulfate de calcium hémihydraté, d'eau et éventuellement d'autres additifs où, dans le procédé, la quantité de retardateurs de durcissement, qui sont ajoutés à la pâte de plâtre, est limitée à 0,006 % en poids ou moins par rapport au poids de sulfate de calcium hémihydraté et l'accélérateur de sulfate de calcium dihydraté est ajouté en tant que composition liquide au sulfate de calcium hémihydraté de telle sorte que l'accélérateur est exposé à un rapport maximal d'eau sur composants secs de 1 à 1,5. La prévention du contact de l'accélérateur avec de plus grandes quantités d'eau évite une perte d'activité de celui-ci due au vieillissement, et permet ainsi une réduction de la quantité de celui-ci et/ou de l'eau de traitement. La présente demande concerne en outre des procédés et des appareils pour la préparation de plaques de plâtre, des pâtes de plâtre correspondantes étant appliquées entre deux feuilles de recouvrement et une utilisation, où un accélérateur spécifique est utilisé pour la préparation de plaques de plâtre ayant un faible taux de retardateurs de durcissement pour ainsi fournir une résistance améliorée à l'arrachement des clous.
PCT/EP2024/025271 2024-09-12 2024-09-12 Procédé de préparation de plaques de plâtre présentant une demande en eau réduite et/ou une résistance améliorée à l'arrachement des clous Pending WO2026057143A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2024/025271 WO2026057143A1 (fr) 2024-09-12 2024-09-12 Procédé de préparation de plaques de plâtre présentant une demande en eau réduite et/ou une résistance améliorée à l'arrachement des clous

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2024/025271 WO2026057143A1 (fr) 2024-09-12 2024-09-12 Procédé de préparation de plaques de plâtre présentant une demande en eau réduite et/ou une résistance améliorée à l'arrachement des clous

Publications (1)

Publication Number Publication Date
WO2026057143A1 true WO2026057143A1 (fr) 2026-03-19

Family

ID=92792527

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/025271 Pending WO2026057143A1 (fr) 2024-09-12 2024-09-12 Procédé de préparation de plaques de plâtre présentant une demande en eau réduite et/ou une résistance améliorée à l'arrachement des clous

Country Status (1)

Country Link
WO (1) WO2026057143A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8016960B2 (en) * 2005-04-27 2011-09-13 United States Gypsum Company Methods of and systems for adding a high viscosity gypsum additive to a post-mixer aqueous dispersion of calcined gypsum
US8016961B2 (en) 2007-06-14 2011-09-13 National Gypsum Properties, Llc Gypsum wallboard and method of making same
WO2020249499A1 (fr) 2019-06-14 2020-12-17 Basf Se Particules de gypse stabilisées

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8016960B2 (en) * 2005-04-27 2011-09-13 United States Gypsum Company Methods of and systems for adding a high viscosity gypsum additive to a post-mixer aqueous dispersion of calcined gypsum
US8016961B2 (en) 2007-06-14 2011-09-13 National Gypsum Properties, Llc Gypsum wallboard and method of making same
WO2020249499A1 (fr) 2019-06-14 2020-12-17 Basf Se Particules de gypse stabilisées

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