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WO2018141034A1 - Composition séquestrante de formaldéhyde pour stratifié de bois, procédé de fabrication de stratifié de bois à émission de formaldéhyde réduite et propriétés mécaniques améliorées, et stratifié de bois - Google Patents

Composition séquestrante de formaldéhyde pour stratifié de bois, procédé de fabrication de stratifié de bois à émission de formaldéhyde réduite et propriétés mécaniques améliorées, et stratifié de bois Download PDF

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Publication number
WO2018141034A1
WO2018141034A1 PCT/BR2017/050020 BR2017050020W WO2018141034A1 WO 2018141034 A1 WO2018141034 A1 WO 2018141034A1 BR 2017050020 W BR2017050020 W BR 2017050020W WO 2018141034 A1 WO2018141034 A1 WO 2018141034A1
Authority
WO
WIPO (PCT)
Prior art keywords
formaldehyde
parts
composition
laminate
alkanolamine
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.)
Ceased
Application number
PCT/BR2017/050020
Other languages
English (en)
Portuguese (pt)
Inventor
Bruno Cesar Ortiz UGARTE
Giulio Pieter FORMENTI
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.)
Isogama Industria Quimica Ltda
Original Assignee
Isogama Industria Quimica Ltda
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 Isogama Industria Quimica Ltda filed Critical Isogama Industria Quimica Ltda
Priority to PCT/BR2017/050020 priority Critical patent/WO2018141034A1/fr
Priority to BR112019016067-1A priority patent/BR112019016067A2/pt
Publication of WO2018141034A1 publication Critical patent/WO2018141034A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds

Definitions

  • the present invention pertains to the field of formaldehyde sequestering compositions in wood laminate products, more specifically, to a process of manufacturing wood laminate product with reduced formaldehyde emission and improved mechanical properties by use of an ethanolamine composition. solubilized in a glycol.
  • Panels of lignocellulosic materials such as wood are used in a wide variety of applications, mainly for commercial and residential building materials. All parts of trees, which are the main raw material in all end products of this industry, have some use and value in the process. After a tree cut is made, it can be converted into a very different set of shapes by chipping and / or cutting it into different sizes / consistencies, or combining it with some form of resin, before pressing / molding.
  • the end result of the process is a wood composite developed for specific applications such as low density fiberboard, medium density fiberboard, high density fiberboard, chipboard, plywood, OSBs, OWBs, MDFs, MDPs, HDFs, structural plywood, planks, columns, and T-beams.
  • Formaldehyde is a highly reactive molecule that, when in contact, may be irritating to tissues. Studies in humans and animals indicate that formaldehyde, when inhaled at a certain level, may be irritating to the respiratory tract and eyes, as well as to the skin and gastrointestinal system by direct (contact) and oral route.
  • Wood composite materials are treated in the postpress step with formaldehyde sequestrants such as amino compounds.
  • US 4501628 deals with a method for reducing formaldehyde emission from wood-based composite panels bonded with aminoplast resins.
  • a saline mixture comprising urea or one of its analogues, an easily ammonia-releasing compound and alternatively a catalyst is prepared in fine granular form.
  • the mixture is then added and combined to the dried wood particles prior to the addition of the binder resin.
  • the mixture comprises 12-20 parts of the ammonia generating compound, 65-88 parts of urea or an analog thereof, and 0-15% of the catalyst. From 6 to 22.5% by weight of this mixture is used in relation to the total resin solids.
  • Formaldehyde evolution is alleged to be reduced by 45-80% compared to an untreated control panel, having an adverse effect on physical properties or press time.
  • US Published patent application US20090181260A1 deals with an alkanolamine-modified phenolic resin formulation, the formulation being formed by reaction of a basic catalyst, formaldehyde, water and a benzene-oi to form an intermediate composition to which an alkanolamine is added to reduce the presence of formaldehyde,
  • US 4376807 describes a treatment for wood panels where the wood fibers are bonded with formaldehyde-based resins, the treatment comprising coating at least one side of the panel with a saline solution containing an ammonium cation. as a 10-15% aqueous solution of ammonium bicarbonate. Decomposition of the ammonium salt reacts with free formateide to produce a stable, low volatile reaction product.
  • the treatment can be applied to panels before and after finishing and formaldehyde reduction occurs on both the top surface of the panels and the transverse surface.
  • US Published Patent Application US201 10171482A1 deals with a formaldehyde sequester for wood laminates.
  • the sequestrant contains urea, monobasic ammonium phosphate and dibasic ammonium phosphate.
  • the weight ratio of urea to monobasic ammonium phosphate and dibasic ammonium phosphate is in the range from 5 to 45 / 0.5 to 15/1 to 20.
  • the application range of the sequester is in the range from 1 to 50 g / m 2 on dry basis.
  • the present invention is directed to an alkanolamine-based formalin-sequestering composition in glycolic solvent for use in wood laminates. agglutinated with formaldehyde-containing resins, after the laminate pressing step, said composition comprising between 10 and 99 parts alkanolamine and between 90 and 1 part glycolic solvent per hundred parts composition, including 50 parts alkanolamine and 50 parts solvent between 80 parts alkanolamine and 20 parts glycolic solvent.
  • an object of the invention is an alkanolamine and glycolic solvent composition as a formaldehyde sequester in wood laminates where the wood is agglutinated with urea formaldehyde, melamine formaldehyde or phenol formaldehyde resins.
  • Another object of the invention is a process of manufacturing laminated wood product with reduced formaldehyde emission and improved mechanical properties with the aid of said formaldehyde sequestering composition.
  • Yet another object of the invention is a reduced formaldehyde emission laminate product and improved mechanical properties over prior art products not treated with the composition of the invention.
  • the invention is a formaldehyde sequestering composition for wood laminates comprising an alkanolamine in a non-aqueous hydroxylated solvent such as a glycol.
  • a formaldehyde sequestering composition for wood laminates comprising an alkanolamine in a non-aqueous hydroxylated solvent such as a glycol.
  • wood laminates as plywood, agglomerates, OSBs, OWBs, MDFs, MDPs, HDFs, structural plywood, boards, columns and T-beams and all wood laminates where lignocellulosic material is bonded by formaldehyde-containing resins. , such as phenol-formaldehyde resins and aminoplast resins such as urea-formaldehyde and melamine-formaldehyde resins.
  • the invention also relates to a process of manufacturing laminate wood with reduced formaldehyde emission and improved properties of both swelling and water absorption, as well as tensile properties, over control without application of the composition of the invention.
  • the composition of the invention for formaldehyde sequestration consists of an alkanolamine such as monoethanolamine, diethanolamine or triethanolamine.
  • alkanolamine such as monoethanolamine, diethanolamine or triethanolamine.
  • monoethanolamine is the preferred compound and is not limited thereto.
  • Alkanolamine as monoethanolamine is present in the composition from 10 to 99 parts alkanolamine and 90 to 1 part glycolic solvent, per 100 parts composition, including 50 parts alkanolamine and 50 parts glycolic solvent, and 90 parts. parts alkanolamine and 10 parts glycolic solvent.
  • the anhydrous glycolic solvent useful for the purposes of the invention may be any diol or a triol, but for economic reasons 1,2,3-propanotriol or glycerin has been used in the composition of the invention. Glycerin, being a byproduct of the biodiesel industry, is extremely abundant in the country and therefore of low cost.
  • a non-aqueous solvent such as the glycol of the composition of the invention avoids hydrolysis (reverse cure reaction) of the resin, hydrolysis being an important factor in reducing the physicochemical and mechanical properties of the laminate or panel.
  • compositions are mixed at room temperature under mechanical agitation, forming a homogeneous mixture rapidly due to their chemical affinity.
  • the composition is applied to ready-made panels after curing the resins, immediately at the press exit or shortly after the laminating or panel cooling equipment.
  • the sequestering composition achieves maximum efficiency, as sequestrants applied in the adhesive mixture ("glue tapping", as the jargon of the area) with the wood or applied just before the entry of the laminates or panels in the press act consuming important part of the formaldehyde contained in the resins, reducing their efficiency in the conformation of the panels. This results in panels of lower or higher physical-chemical-mechanical resistance. expensive (due to the need to apply more resin to compensate for the negative effect of the sequester).
  • the proportion of sequestering composition applied to the laminates is between 5 and 70 g / m 2 , including between 30 and 60 g / m 2 and 40 and 50 g / m 2
  • post-press application that is, when formaldehyde has already reacted by cross-linking the prepolymer molecular chains (urea-formaldehyde resin) as advocated in the invention, causes The sequestering composition reacts only with formaldehyde that is free or easily released in ready-made laminates, thereby reducing formaldehyde emission.
  • the laminate is sanded, as is customary for panels of thickness greater than 6 mm.
  • fixing a part of the sequestering composition is removed, exposing surface of high physical-chemical-mechanical resistance.
  • the process of manufacturing wood laminates with reduced formaldehyde emission and improved mechanical physicochemical properties comprises the steps of:
  • composition based on an ethanoamine solubilised in a glycolic solvent, in the ratio of 10 to 99 parts alkanolamine and between 90 and 1 part glycolic solvent per 100 parts of composition, including 50 parts parts of alkanolamine and 50 parts of glycolic solvent, and between 80 parts of alkanolamine and 20 parts of glycolic solvent;
  • step b) Curing the laminate of step b) to obtain a cured laminate
  • step (d) For the cured laminate of step (c), apply the composition of step (a) to the ratio in grams per square meter of surface area between 5 and 70 g / m 2 , including between 30 and 60 g / m 2 and 40 and 50 g / m 2 ;
  • step d) After at least 40 minutes of applying the composition, step d) sanding the laminate;
  • Tests on 350 x 150 x 15 mm MDP (agglomerate) laminates made with urea-formaldehyde resin were treated with the sequestering composition of the invention, which comprised a mixture of 85 parts monoethaneamine and 15 parts glycerin per 100 parts of composition.
  • the composition was applied by roller to the surface weight (dosage) of 45 g / m 2 . After 16 hours the laminates were sanded by removing 0.15 mm from each side. A panel without application was also sanded and analyzed as a control.
  • Formaldehyde emission test results adapted from JIS A 5905 in mg / L, Swelling after immersion in water according to ABNT NBR 14810-2 in%, Water absorption after immersion according to ABNT NBR 14810-2 in% and Internal traction according to ABNT NBR 14810-2 in Kgf / cm 2 are listed in Table 1 below.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

L'invention concerne une composition séquestrante de formaldéhyde pour stratifié de bois, comprenant entre 10 et 99 parties d'une alcanolamine et entre 90 et 1 partie d'un glycol pour cent parties de la composition, cette composition étant appliquée après l'étape de pressage du stratifié en quantité en gramme par mètre carré de surface, comprise entre 5 et 70 g/m2. Il résulte du procédé d'application de la composition de l'invention que le stratifié obtenu présente une émission de formaldéhyde réduite et une absorption d'eau et des propriétés mécaniques améliorées par rapport à un stratifié témoin. Le procédé de fabrication du stratifié et le stratifié de bois sont également décrits.
PCT/BR2017/050020 2017-02-03 2017-02-03 Composition séquestrante de formaldéhyde pour stratifié de bois, procédé de fabrication de stratifié de bois à émission de formaldéhyde réduite et propriétés mécaniques améliorées, et stratifié de bois Ceased WO2018141034A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/BR2017/050020 WO2018141034A1 (fr) 2017-02-03 2017-02-03 Composition séquestrante de formaldéhyde pour stratifié de bois, procédé de fabrication de stratifié de bois à émission de formaldéhyde réduite et propriétés mécaniques améliorées, et stratifié de bois
BR112019016067-1A BR112019016067A2 (pt) 2017-02-03 2017-02-03 Composição sequestrante de formaldeído para laminado de madeira, processo de manufatura de laminado de madeira com emissão de formaldeído reduzida e propriedades mecânicas melhoradas e laminado de madeira

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/BR2017/050020 WO2018141034A1 (fr) 2017-02-03 2017-02-03 Composition séquestrante de formaldéhyde pour stratifié de bois, procédé de fabrication de stratifié de bois à émission de formaldéhyde réduite et propriétés mécaniques améliorées, et stratifié de bois

Publications (1)

Publication Number Publication Date
WO2018141034A1 true WO2018141034A1 (fr) 2018-08-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2017/050020 Ceased WO2018141034A1 (fr) 2017-02-03 2017-02-03 Composition séquestrante de formaldéhyde pour stratifié de bois, procédé de fabrication de stratifié de bois à émission de formaldéhyde réduite et propriétés mécaniques améliorées, et stratifié de bois

Country Status (2)

Country Link
BR (1) BR112019016067A2 (fr)
WO (1) WO2018141034A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2003635A1 (fr) * 1989-11-22 1991-05-22 Andrew Blair Composition d'enduction et de traitement du bois
US5635217A (en) * 1991-04-18 1997-06-03 Dr. Wolman Gmbh Wood preservatives
WO2010056441A1 (fr) * 2008-11-17 2010-05-20 Dow Global Technologies Inc. Procédés de réduction du formaldéhyde transporté par l’atmosphère
US9090855B2 (en) * 2010-06-17 2015-07-28 S.C. Johnson & Son, Inc. Anti-bacterial cleaning composition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2003635A1 (fr) * 1989-11-22 1991-05-22 Andrew Blair Composition d'enduction et de traitement du bois
US5635217A (en) * 1991-04-18 1997-06-03 Dr. Wolman Gmbh Wood preservatives
WO2010056441A1 (fr) * 2008-11-17 2010-05-20 Dow Global Technologies Inc. Procédés de réduction du formaldéhyde transporté par l’atmosphère
US9090855B2 (en) * 2010-06-17 2015-07-28 S.C. Johnson & Son, Inc. Anti-bacterial cleaning composition

Also Published As

Publication number Publication date
BR112019016067A2 (pt) 2020-03-31

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