EP4584341A1 - Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité du charbon de revêtements en cas d'incendie - Google Patents

Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité du charbon de revêtements en cas d'incendie

Info

Publication number
EP4584341A1
EP4584341A1 EP23758327.3A EP23758327A EP4584341A1 EP 4584341 A1 EP4584341 A1 EP 4584341A1 EP 23758327 A EP23758327 A EP 23758327A EP 4584341 A1 EP4584341 A1 EP 4584341A1
Authority
EP
European Patent Office
Prior art keywords
composition
composition according
polymer
aqueous
acid
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
EP23758327.3A
Other languages
German (de)
English (en)
Inventor
Hector FARRAS GUTIERREZ
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP4584341A1 publication Critical patent/EP4584341A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C09D5/024—Emulsion paints including aerosols characterised by the additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C09D5/185—Intumescent paints

Definitions

  • Intumescent Composition and Use of the Intumescent Composition to increase Char Stability of Coatings in the Event of Fire
  • the present invention relates to a composition for an aqueous intumescent coating comprising an aqueous polymer dispersion, an alkoxy-functional organic polymer containing alkoxy-functional silane groups, an intumescent compound mixture and additional water. Furthermore, the present invention relates to the use of the inventive composition as coating composition to increase char stability of coatings produced from said coating compositions in the event of fire.
  • the thickness of the applied coating layer, or the char developing therefrom, is crucial to attaining the required fire resistance duration. Closed profiles, such as pipes with comparable solidity, require about twice the amount compared to open profiles, such as beams with a double-T profile.
  • the coating must have a certain thickness and can form a voluminous, and thus good insulating, char as possible when exposed to heat and which remains mechanically stable over the period of exposure to fire.
  • a coating must not only have functional properties, such as sufficient fire resistance as described before, but must also meet increasingly high aesthetic demands.
  • EP 3 945 118 A1 discloses a composition based on a binder system comprising an aqueous polymer dispersion, an alkoxy-functional organic polymer containing alkoxyfunctional silane groups, and an intumescent compound mixture.
  • Inorganic fibers and/or inorganic char reinforcing agents are used to ensure sufficient char formation and stability in the event of fire.
  • such fibers and/or char reinforcing agents may have a negative impact on the coating appearance once the coating is applied to a surface.
  • it is known that the use of fibers leads to a roughening of the surface. Accordingly, there remains a general desire for improvement of the optical appearance of coatings without compromising the functional properties of the coating.
  • an object of the present invention is to provide an intumescent coating composition which allows sufficient char formation and char stability in the event of fire, and which may reduce or even negate the use of inorganic fibers and/or reinforcing agents to improve coating appearance once the coating composition is applied to a surface.
  • composition for an intumescent coating composition comprising:
  • the fundamental method of effect in this regard is that the carbon layers that form, and are actually very soft, are mechanically solidified by inorganic compounds.
  • the addition of such a char stabilizer contributes to significant stabilization of the intumescence crust in the event of a fire because these additives increase the mechanical strength of the intumescent layer and/or prevent it from dripping off.
  • the basic skeleton can have a linear or branched structure (linear basic skeleton with side chains along the chain of the basic skeleton) and contains alkoxy-functional silane groups, preferably at least two alkoxy-functional silane groups, in a terminating position, i.e. as the end groups of a linear basic skeleton or as the end groups of the linear basic skeleton and as the end groups of the side groups.
  • the basic skeleton consists of polyether, polypropylene glycol or polyurethane.
  • the viscosity of these alkoxysilane-functional polymers preferably lies between 0.1 and 50,000 Pa s, more preferably between 0.5 and 35,000 Pa s, and most preferably between 0.5 and 30,000 Pa s.
  • the viscosity was determined using a Kinexus rotation rheometer, by measuring a flow curve at +23 °C; the values indicated are the measured value at 215 s’ 1 .
  • the polymer carries 2 to 8 alkoxysilane-functional silane groups per prepolymer molecule.
  • the degree of crosslinking of the binder and thereby both the strength of the resulting coating and its elastic properties can be adjusted as a function of the chain length of the basic skeleton, the alkoxy-functionality of the polymer, and the seat of the alkoxyfunctional silane groups.
  • the total amount of the polymeric compounds that is, the amount of the polymeric compounds resulting from the alkoxy-functional polymer and the aqueous polymer dispersion usually is 9 to 60 wt.-%, preferably 12 to 35 wt.-%, with reference to the total weight of the composition.
  • the amount of the polymer resulting from the alkoxy-functional polymer is 0,01 to 33 wt.-%, preferably 1 to 7 wt.-%, with reference to the total weight of the composition.
  • the aqueous copolymer dispersion and the alkoxyfunctional organic polymer must be stored separately. This means that both components must be packed separately, e.g. in a two- or multi-component packaging, preferably in a two-component packaging.
  • the amount of the (co)polymer in the component, which contains the aqueous polymer dispersion is 12 to 20 wt.-%, preferably 13 to 19 wt.-%, with reference to the total weight of the component containing the aqueous polymer dispersion;
  • the amount of the polymer in the component, which contains the alkoxy-functional polymer is 10 to 100 wt.-%, preferably 20 to 99 wt.-%, with reference to the total weight of the component containing the alkoxy-functional polymer.
  • the weight ratio between the component containing the aqueous polymer dispersion to the component containing the alkoxy-functional polymer is from 100:1 to 1 :1.
  • the composition contains an intumescent composition, wherein the composition can comprise both one individual compound or a mixture of multiple compounds.
  • an intumescent composition a compound that acts by means of the formation of an expanded insulating layer that forms under the effect of heat, composed of a material with low flammability, which protects the substrate from overheating and thereby prevents or at least delays a change in the mechanical and static properties of supporting structural parts.
  • the formation of a voluminous insulating layer, namely a char layer can be formed by means of the chemical reaction of a mixture of corresponding compounds, coordinated with one another, which react with one another under the effect of heat.
  • Such systems are known to a person skilled in the art by the term chemical intumescence and can be used according to the invention.
  • an intumescent layer by means of chemical intumescence, at least three components are generally required, a carbon supplier, a dehydrogenation catalyst, and a gas-forming agent, which are contained in a binder in the case of coatings, for example. Under the effect of heat, the binder plasticizes, and the compounds are released, so that they react with one another, in the case of chemical intumescence.
  • the acid that serves as the catalyst for carbonization of the carbon supplier is formed from the dehydrogenation catalyst, by means of thermal decomposition.
  • the gas-forming agent decomposes, forming inert gases that brings about expansion of the carbonized (charred) material and, if applicable, the plasticized binder, causing the formation of a voluminous, insulating foam.
  • the insulation-layer-forming additive comprises at least one carbon-skeleton-forming agent, if the binder cannot be used as such, at least one acid- forming agent, at least one gas-forming agent, and at least one inorganic skeletonforming agent.
  • the intumescent composition (B) comprises at least one acid-forming agent and at least one gas-forming agent.
  • the intumescent composition can contain additionally at least one inorganic skeleton-forming agent. Even if the binder itself can serve as a carbon-skeleton-forming agent, an additional carbon- skeleton-forming agent can additionally be added to the intumescent composition.
  • the components of the intumescent composition are particularly selected in such a manner that they can develop synergy, wherein some of the compounds can fulfill multiple functions.
  • polyols such as saccharides and polysaccharides and/or a thermoplastic or duroplastic polymer resin binder, such as a phenolic resin, a urea resin, a polyurethane, polyvinyl chloride, poly(meth)acrylate, polyvinyl acetate, polyvinyl alcohol, a silicone resin and/or a natural rubber.
  • the binder itself can also have the function of a carbon supplier.
  • phosphoric acid compounds can be mentioned: mono-ammonium phosphate, di-ammonium phosphate, ammonium phosphate, ammonium polyphosphate, melamine phosphate, melamine resin phosphate, potassium phosphate, polyol phosphates such as pentaerythrite phosphate, glycerin phosphate, sorbite phosphate, mannite phosphate, dulcite phosphate, neopentyl glycol phosphate, ethylene glycol phosphate, di pentaerythrite phosphate, and the like.
  • a polyphosphate or an ammonium polyphosphate is used as a phosphoric acid compound.
  • melamine resin phosphates are understood to be compounds such as the reaction products of Lamelite C (melamine/formaldehyde resin) with phosphoric acid.
  • the following examples of sulfuric acid compounds can be mentioned: ammonium sulfate, ammonium sulfamate, nitroaniline bisulfate, 4-nitroaniline-2-sulfonic acid and 4,4- dinitrosulfanilamide and the like.
  • Melamine borate can be mentioned as an example of a boric acid compound.
  • Possible gas-forming agents are the compounds usually used in fire-protection agents and known to a person skilled in the art, such as cyanuric acid or isocyanic acid and their derivatives, melamine and its derivatives.
  • Such compounds are cyanamide, dicyanamide, dicyandiamide, guanidine and its salts, biguanide, melamine cyanurate, cyanic acid salts, cyanic acid esters and amide, hexamethoxymethyl melamine, dimelamine pyrophosphate, melamine polyphosphate, melamine phosphate.
  • hexamethoxymethyl melamine or melamine cyanuric acid amide
  • char stabilizer in form of fibers and/or reinforcing agents may be present in the composition according to the invention, but their presence is not required to obtain a hard char. Therefore, it is preferred that the composition according to the present invention does not contain any char stabilizer in form of fibres and/or reinforcing agents.
  • the term fibers describe preferably inorganic fibers selected from the group consisting of glass fibers, mineral fibers and ceramic fibers. Fibers can also include high thermal stable organic fibers such as polyacrylonitrile based carbon fibers.
  • the term reinforcing agent relates preferably to any kind of clay, preferably china clay.
  • char stabilizers such as melamine phosphate or melamine borate can be contained.
  • the intumescent composition can be contained in the composition in an amount of 30 to 99 wt.-%, with reference to the total composition, wherein the amount essentially depends on the application form of the composition (spraying, brushing, and the like).
  • the proportion of the intumescent composition in the total formulation is set to be as high as possible.
  • its proportion in the total formulation amounts to 35 to 85 wt.-%, and particularly preferably
  • the composition contains in addition to the water of the aqueous polymer dispersion (a) additional water as a further crosslinking agent for the alkoxy-functional organic polymer to allow curing regardless of the environmental conditions.
  • additional water as a further crosslinking agent for the alkoxy-functional organic polymer to allow curing regardless of the environmental conditions.
  • Curing of the composition therefore becomes independent of the absolute humidity in the air, and the composition cures reliably and quickly, even under extremely dry conditions.
  • the amount of additional water, not including the water of the aqueous polymer dispersion, is 4 to 15 wt.-%, with reference to the total weight of the composition.
  • the total amount of water in the component containing the aqueous polymer dispersion depends on the amount of the dispersion and the amount of the water in the dispersion. Together with the amount of water, which is introduce by the aqueous polymer dispersion, the total amount of water in the WB component is preferably 15 to 45 wt.-%, with reference to the total weight of the component containing the aqueous polymer dispersion.
  • the aqueous copolymer dispersion together with the optionally contained additional water and the alkoxy-functional organic polymer must be stored separately. This means that both components must be packed separately, e.g. in a two- or multi-component packaging.
  • the weight ratio of the polymer resulting from the aqueous polymer dispersion to the polymer resulting from the alkoxy-functional polymer is in the range of 0.08:1 to 267:1 , preferably in the range of 1.5:1 to 10:1.
  • the composition can contain further crosslinking agents, other than water. These are referred to as cocrosslinking agents herein. Different properties, such as adhesion to the substrate, better wetting of the additives, and curing speed of the composition can be optimized in targeted manner and customized by means of the co-crosslinking agent.
  • catalysts that do not contain metals are preferred.
  • Higher SVR is beneficial because it means a lower concentration of volatile compounds (water in this case) and a lower PVC is known to provide a lower risk for long term durability of the film formed by the coating as there is higher concentration of binder in relation to pigments.
  • the absence of fibres also will allow to use smaller nozzles and lower pressures to apply the material by spray applications.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une composition pour un revêtement intumescent aqueux comprenant une dispersion polymère aqueuse, un polymère organique à fonction alcoxy contenant des groupes silane à fonction alcoxy, un mélange de composés intumescents et d'eau additionnelle. En outre, la présente invention concerne l'utilisation de la composition de l'invention en tant que composition de revêtement pour augmenter la formation de charbon et la stabilité de revêtements produits par lesdites compositions de revêtement en cas d'incendie.
EP23758327.3A 2022-09-09 2023-08-22 Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité du charbon de revêtements en cas d'incendie Pending EP4584341A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22194809.4A EP4335908A1 (fr) 2022-09-09 2022-09-09 Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité au chargement de revêtements en cas d'incendie
PCT/EP2023/072958 WO2024052105A1 (fr) 2022-09-09 2023-08-22 Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité du charbon de revêtements en cas d'incendie

Publications (1)

Publication Number Publication Date
EP4584341A1 true EP4584341A1 (fr) 2025-07-16

Family

ID=83271609

Family Applications (2)

Application Number Title Priority Date Filing Date
EP22194809.4A Withdrawn EP4335908A1 (fr) 2022-09-09 2022-09-09 Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité au chargement de revêtements en cas d'incendie
EP23758327.3A Pending EP4584341A1 (fr) 2022-09-09 2023-08-22 Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité du charbon de revêtements en cas d'incendie

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP22194809.4A Withdrawn EP4335908A1 (fr) 2022-09-09 2022-09-09 Composition intumescente et utilisation de la composition intumescente pour augmenter la stabilité au chargement de revêtements en cas d'incendie

Country Status (2)

Country Link
EP (2) EP4335908A1 (fr)
WO (1) WO2024052105A1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2509632B2 (de) 1974-03-06 1980-03-06 Sumitomo Chemical Co., Ltd., Osaka (Japan) Flammabweisende Beschichtungsmassen und ihre Verwendung zum Beschichten von Konstruktionsteilen aus Sperrholz oder Hartfaserplatten
IT1087952B (it) 1977-10-10 1985-06-04 Montedison Spa Vernici antifiamma.
DE3466011D1 (en) 1983-08-23 1987-10-15 Dixon International Ltd Intumescent material
US4784918A (en) * 1987-03-30 1988-11-15 Ppg Industries, Inc. Compositions and coatings of phosphorus-containing film formers with organo silane and coated substrates
DE102008000360A1 (de) 2008-02-21 2009-08-27 Evonik Goldschmidt Gmbh Neue Alkoxysilylgruppen tragende Polyetheralkohole durch Alkoxylierung epoxidfunktioneller Alkoxysilane an Doppelmetallcyanid (DMC)-Katalysatoren, sowie Verfahren zu deren Herstellung
DE102009028640A1 (de) 2009-08-19 2011-02-24 Evonik Goldschmidt Gmbh Härtbare Masse enthaltend Urethangruppen aufweisende silylierte Polymere und deren Verwendung in Dicht- und Klebstoffen, Binde- und/oder Oberflächenmodifizierungsmitteln
DE102010030096A1 (de) 2010-06-15 2011-12-15 Wacker Chemie Ag Silanvernetzende Zusammensetzungen
DE102010038768A1 (de) 2010-08-02 2012-02-02 Evonik Goldschmidt Gmbh Modifizierte Alkoxylierungsprodukte mit mindestens einer nicht-terminalen Alkoxysilylgruppe mit erhöhter Lagerstabilität und erhöhter Dehnbarkeit der unter deren Verwendung hergestellten Polymere
DE102010038774A1 (de) 2010-08-02 2012-02-02 Evonik Goldschmidt Gmbh Modifizierte Alkoxylierungsprodukte, die zumindest eine nicht-terminale Alkoxysilylgruppe aufweisen, mit erhöhter Lagerstabilität und erhöhter Dehnbarkeit der unter deren Verwendung hergestellten Polymere
KR101951495B1 (ko) 2011-06-30 2019-02-22 다우 글로벌 테크놀로지스 엘엘씨 코팅, 접착제, 실란트 및 탄성중합체 응용을 위한 실란 종결된 중합체
EP3945118A1 (fr) 2020-07-28 2022-02-02 Hilti Aktiengesellschaft Composition de revêtement de protection contre les incendies et son utilisation
CN114316735A (zh) * 2021-12-23 2022-04-12 广东腐蚀科学与技术创新研究院 一种水性环氧膨胀型钢结构防火涂料及其制备方法
CN114806314B (zh) * 2022-04-27 2023-02-03 菲沐盛(山西)材料科技有限公司 一种P/N/Si/Ca协同阻燃的水性膨胀型阻燃涂料及其制备方法

Also Published As

Publication number Publication date
WO2024052105A1 (fr) 2024-03-14
EP4335908A1 (fr) 2024-03-13

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