WO2015114352A1 - Composition - Google Patents

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Publication number
WO2015114352A1
WO2015114352A1 PCT/GB2015/050223 GB2015050223W WO2015114352A1 WO 2015114352 A1 WO2015114352 A1 WO 2015114352A1 GB 2015050223 W GB2015050223 W GB 2015050223W WO 2015114352 A1 WO2015114352 A1 WO 2015114352A1
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Prior art keywords
composition
manganese
oxidatively curable
chelant
formulation
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PCT/GB2015/050223
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English (en)
Inventor
Johannes Wietse De Boer
Karin MAAIJEN
Ronald Hage
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Chemsenti Limited
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Publication of WO2015114352A1 publication Critical patent/WO2015114352A1/fr

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    • 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
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • C08G63/82—Preparation processes characterised by the catalyst used
    • C08G63/83—Alkali metals, alkaline earth metals, beryllium, magnesium, copper, silver, gold, zinc, cadmium, mercury, manganese, or compounds thereof

Definitions

  • the present invention relates to an oxidatively curable coating composition with which a formulation for use in catalysing the curing of oxidatively curable coating compositions, in particular oxidatively curable coating compositions comprising an oxidatively curable alkyd-based resin, has been contacted.
  • the formulations described herein comprise a triazacyclononane-based chelant; a manganese (II), (III) or (IV) salt; and an alcohol or ketone, which alcohol or ketone typically acts as a solvent for the salt and the chelant.
  • the invention also relates to preparing the oxidatively curable coating compositions of the invention, such coating compositions once cured and methods comprising applying such coating compositions to a substrate.
  • Alkyd resins are a well understood and dominant binder in many oxidatively curable paints and other solvent-based coatings. Alkyd emulsion paints, in which the continuous phase is aqueous, are also widely available commercially. Alkyd resins are produced by the reaction of polyols with carboxylic acids or anhydrides. To make them susceptible to what is commonly referred to as a drying process, some alkyd resins are reacted with unsaturated triglycerides or other source of unsaturation. Plant and vegetable oils, such as linseed oil, are frequently used as the source of triglycerides.
  • unsaturated groups in particular carbon-carbon double bonds
  • This oxidative curing process gives the appearance of drying and is often and herein referred to as such.
  • the length of time required for drying depends on a variety of factors, including the constituents of the alkyd resin-containing composition and the amount and nature of the liquid continuous phase (e.g. solvent) in which the alkyd resin is formulated.
  • Film formation results from the autoxidation and polymerisation chemistries that occur during the drying of alkyd-based resins. It will proceed slowly in the absence of catalysis. However, it is customary to include in compositions of curable resins small, i.e. catalytic, quantities of optionally organic metal salts, often referred to as metal driers, which catalyse the polymerisation of unsaturated material so as to form the three-dimensional network.
  • Driers used for solvent-based coatings typically include alkyl carboxylates, typically C 6 -C 18 carboxylates, of metals such as cobalt, manganese, lead, zirconium, zinc, vanadium, strontium, calcium and iron.
  • Such metal carboxylates are often referred to as metal soaps.
  • Redox-active metals such as manganese, iron, cobalt, vanadium and copper, enhance radical formation, and thus the oxidative curing process, whilst so-called secondary driers (sometimes referred to as auxiliary driers), such as complexes based on strontium, zirconium and calcium, enhance the action of the redox-active metals.
  • auxiliary driers such as complexes based on strontium, zirconium and calcium
  • these soaps are based on medium-chain alkyl carboxylates such as 2-ethylhexanoate.
  • the lipophilic units in such soaps enhance the solubility of the drier in solvent-based paints and other oxidatively curable coating compositions.
  • metal driers that are redox metal complexes containing organic ligands can be used as driers, for example manganese complexes comprising 2,2'-bipyridine.
  • WO 03/093384 A1 (Ato B.V.) describes the use of reducing biomolecules in combination with transition-metal salts or complexes based on pyrazoles, aliphatic and aromatic amines, 2,2'-bipyridine, 1 ,10'-phenanthroline and 1 ,4,7-trimethyl-1 ,4,7- triazacyclononane (Me 3 TACN).
  • WO 03/029371 A1 (Akzo Nobel N.V.) describes the use of complexes comprising Schiff base compounds to enhance the drying of coatings, in which complexes at least one solubilising group is covalently bound to the organic ligand.
  • EP 1382648 A1 (Universiteit Leiden) describes the use of manganese complexes with acetylacetonate and bidentate nitrogen donor ligands in paint drying.
  • WO 2008/003652 A1 (Unilever PLC et al.) describes the use of tetradentate, pentadentate or hexadentate nitrogen ligands bound to manganese and iron as siccatives for curing alkyd-based resins.
  • Oyman et al. describe the oxidative drying of alkyd paints by [ ⁇ 2 ( ⁇ - 0) 3 (Me 3 tacn)2](PF 6 )2 (Z O Oyman et al., Surface Coating International Part B - Coatings Transaction, 88, 269 (2005)).
  • WO 201 1/098583 A1 WO 201 1/098584 A1 and WO 201 1/098587 A1 (each DSM IP Assets B.V.) describe the use of a variety of dinuclear manganese complexes with Me 3 TACN as ligand for paint drying.
  • WO 2012/092034 A2 (Dura Chemicals, Inc.) describes the use of a transition metal and a porphyrin based ligand as a siccative for resin compositions.
  • WO 2013/92441 A1 and WO 2013/92442 A1 (both Akzo Nobel Coatings International B.V.) describe the use of mixtures of manganese salts and triazacyclononane-based chelants, having a chelant: manganese ion ratio of at least 1 .25:1 and a manganese ion: chelant: ratio of at least 1 .25:1 respectively.
  • oxidatively curable coating compositions for example from WO 2008/003652 A1 , WO 201 1/098583 A1 , WO 201 1/098584 A1 , WO 201 1/098587 A1 and WO 2012/092034 A2, that advantageous curing rates of oxidatively curable resins, for example alkyd-based resins, results from the use of metal driers comprising ligands that give rise to relatively stable transition metal-ligand complexes.
  • metal driers comprising ligands that give rise to relatively stable transition metal-ligand complexes.
  • polydentate ligands i.e. ligands that bind a metal ion through more than one donor site
  • improved stability of the resultant metal complexes in different redox states can be observed, as compared with the corresponding complexes where monodentate ligands are used.
  • compositions contain metal driers that comprise well-defined transition metal ion-ligand complexes.
  • complexes are not well-defined.
  • a well-defined complex is meant herein (as the term is used customarily in the art) a complex that has been isolated such that it is susceptible to characterisation (i.e. definition) and analysis (e.g. to determine its structure and degree of purity).
  • a complex that is not well-defined is one that is prepared without isolation from the medium (e.g. reaction medium) in which it is prepared, and (generally) used, i.e. is generally prepared in situ.
  • metal drier-containing compositions comprise manganese ion- ligand complexes that are not-defined
  • these are generally formulated from a mixture of a ligand and a transition metal soap, particularly soaps comprising formulated in organic solvents, such as aliphatic hydrocarbons.
  • organic solvents such as aliphatic hydrocarbons.
  • VOCs volatile organic compounds
  • transition metal salts with different counterions, so as to try to avoid the use of soaps per se and/or to try to achieve a reduction in the use of VOCs.
  • the present invention is intended to address these challenges.
  • manganese salts containing particular counterions such as small hydrophilic counterions
  • triazacyclononane-based chelants formulated in an alcohol or ketone organic solvent
  • manganese salts containing small and hydrophilic anions e.g. acetate, chloride, nitrate or sulfate, are not readily soluble in the organic and typically hydrophobic solvents in which paints and other oxidatively curable coating compositions are typically formulated.
  • the invention provides the advantageous formulation of non-soap manganese salts and alcohol- or ketone-comprising solvent system not used hitherto for siccative formulations, but which formulations are nevertheless useful for accelerating the curing of oxidatively curable coating compositions, including hydrophobic solvent-based oxidatively curable coating compositions.
  • the invention provides an oxidatively curable alkyd-based coating composition that has been contacted with a formulation obtainable by a method comprising contacting the following components:
  • a manganese ion-containing salt comprising a manganese ion having a valency of (II), (III) or (IV) and a counteranion selected from the group consisting of acetate, chloride, nitrate, formate, propionate, bromide, carbonate, acetylacetonate and sulfate;
  • each R is independently selected from the group consisting of hydrogen, C 1 -C 24 alkyl, CH 2 CH 2 OH, CH 2 COOH and pyridine-2-ylmethyl; and Q is a C 2 -C 6 alkylene bridge, a C 6 -C 10 arylene bridge or a bridge comprising one or two C C 3 alkylene units and one C 6 -C 10 arylene unit, which bridge may be optionally substituted one or more times with independently selected CrC 24 alkyl groups; and
  • each R R 2 , R 3 , and R 4 is independently selected from hydrogen, C 1 -C 4 alkyl and CrC ⁇ alkylhydroxy;
  • the method not comprising contact of the mixture resultant from contacting of the salt, the chelant and the alcohol or the ketone with hydrogen peroxide or a source thereof.
  • the invention provides a method comprising contacting an oxidatively curable alkyd-based coating composition with a formulation as defined in accordance with the first aspect of the invention.
  • the invention provides a method comprising applying the oxidatively curable coating composition of the first aspect of the invention, or obtainable according to the second aspect of the invention, to a substrate.
  • the invention provides the oxidatively curable coating composition according to the first aspect of the invention, or obtainable in accordance with the second aspect of the invention, once cured.
  • the present invention is based in part on the recognition that manganese salts containing small hydrophilic counterions in combination with triazacyclononane-based ligands, or chelants, of formula (I), formulated in organic solvents containing OH groups or oxo (also known as keto or ketone) groups, are useful in curing paints and other oxidatively curable coating compositions. This would not have been expected from the prior art.
  • the formulations useful in accordance with the first and second aspects of the invention are obtainable by contacting the components from which the formulation is prepared with each other, typically by stirring, sonication, vortexing or shaking, so as to form a mixture.
  • the formulations may, and typically do, comprise only one type of each of these components, for example one chelant, one alcohol- or ketone-containing solvent, and one manganese salt.
  • these formulations may be made from mixtures of two or more chelants; and/or two or more alcohols and/or ketones; and/or two or more types of manganese salt.
  • chelant is meant herein a chelating agent (used interchangeably herein with the term "chelant") capable of chelating at least one transition metal ion through two or more donor atoms, typically nitrogen atoms.
  • chelants present in the formulations described herein are capable of chelating two manganese ions through the three nitrogen atoms of the two 1 ,4,7-triazacyclononane motifs of formula (I).
  • the chelants of formula (I) are bridged dimers of triazacyclononane-based ligands, in which one nitrogen atom in each of the two triazacyclononane-based ligands is attached to the same (and thus the bridging) linker (Q).
  • Q may be a C 2 -C 6 alkylene bridge.
  • alkylene bridges are typically although not necessarily straight chain alkylene bridges as discussed below. They may, however, be cyclic alkylene groups (e.g. the bridge may be cyclohexylene).
  • Q is a C 6 -C 10 arylene bridge, this may be, for example, phenylene or the corresponding arylene formed by abstraction of two hydrogen atoms from naphthalene.
  • Q comprises one or two C C 3 alkylene units and one C 6 -C 10 arylene unit, such bridges may be, for example, -CH 2 C 6 H 4 CH 2 - or -CH 2 C 6 H 4 -. It will be understood that each of these bridges may be optionally substituted one or more times, for example once, with independently selected C C ⁇ alkyl (e.g. Ci-Ci 8 alkyl) groups.
  • Q is typically a C 2 -C 6 alkylene bridge.
  • Q is typically a straight chain alkylene, e.g. is ethylene, n-propylene, n- butylene, n-pentylene or n-hexylene.
  • the C 2 -C 6 alkylene bridge is ethylene, n-propylene or n-butylene.
  • the C 2 -C 6 alkylene bridge is ethylene or n-propylene.
  • the C 2 -C 6 alkylene bridge is n-propylene or n-butylene.
  • the C 2 -C 6 alkylene bridge is ethylene.
  • references to propylene and butylene are intended to refer to n-propylene (i.e. -CH 2 CH 2 CH 2 -) and n-butylene (i.e. -CH 2 CH 2 CH 2 CH 2 -) respectively.
  • each R is independently selected from the group consisting of hydrogen, d-C ⁇ alkyl, CH 2 COOH and pyridine-2-ylmethyl. According to other particular embodiments, each R is independently selected from the group consisting of hydrogen, d-C ⁇ alkyl and pyridine-2-ylmethyl. According to still other particular embodiments, each R is independently selected from the group consisting of hydrogen and CrC ⁇ alkyl. According to each of these groups of embodiments, a CrC ⁇ alkyl group may be a CrCesalkyl group. According to other, even more specific, embodiments, each R is independently selected from the group consisting of Ci-C 6 alkyl.
  • each R group is the same, typically CV C 6 alkyl, in particular methyl.
  • R 2 , R 3 , and R 4 are independently selected from hydrogen and methyl, typically in which each R R 2 , R 3 , and R 4 is the same, in particular embodiments of which each of R ⁇ R 2 , R 3 , and R 4 is hydrogen.
  • each R is independently selected from: hydrogen, CH 3 , C 2 H 5 , CH 2 CH 2 OH and CH 2 COOH; and/or
  • Q is selected from ethylene, propylene or butylene.
  • each R, R ⁇ R 2 , R 3 , and R 4 is
  • the chelant of formula (I) is 1 ,2-bis-(4,7- dimethyl-1 ,4,7,-triazacyclonon-1 -yl)-ethane (Me 4 -DTNE); 1 ,3-bis-(4,7-dimethyl-1 ,4,7,- triazacyclonon-1 -yl)-propane; or 1 ,4-bis-(4,7-dimethyl-1 ,4,7,-triazacyclonon-1 -yl)- butane.
  • 1 ,4,7-triazacyclononane-based chelants described herein, i.e. of formula (I) is believed to be particularly advantageous since these cyclic triamine-containing chelants show a high stability towards aerial oxidation. This may be attributable to protonation of the 1 ,4,7-triazacyclononane moieties owing to their very high pKa values (of around 12-13).
  • the protons may be provided by water or protic solvents present in formulations and compositions of the invention, or from moisture in the air.
  • the proton is bound/bridged to the three nitrogen donor atoms when the chelant is protonated because of the structure of the cyclic triamine, which confers still further stability (cf. P Chaudhuri and K Wieghardt, Prog. Inorg Chem., 35, 329 (1987)).
  • the chelants from which the formulations described herein are made can be introduced (i.e. contacted with the other components of the formulation) as free amines, or as protonated salts, (cf. the teaching in EP 0 902 021 A2 (Clariant GmbH)).
  • the chelants can also be introduced as a solution, or a slurry/suspension in a solvent (for example an alcohol or a ketone).
  • the formulations described herein are made from a manganese ion- containing salt.
  • Such salts are typically simple manganese ion-containing salts, e.g. which consist of manganese ions of valency (II), (III) or (IV) and counteranions selected from the group consisting of acetate, chloride, nitrate, formate, propionate, bromide, carbonate, acetylacetonate and sulfate.
  • a simple manganese salt is meant a salt in which the cations comprise only manganese ions, i.e. the salt consists of manganese ions and anions (for example the counteranions defined herein).
  • Such simple salts may be contrasted with the complex manganese ion-containing salts described elsewhere herein, for example those comprising complex cations that comprise complexes of manganese ions and triazacyclononane-based ligands, optionally with ligands bridging two manganese ions.
  • the counteranions of the manganese salt from which the formulations described herein are made are small hydrophilic counterions.
  • the counteranions are selected from the group consisting of acetate, chloride, nitrate, formate, propionate, bromide, carbonate and acetylacetonate. Often these counteranions are selected from the group consisting of acetate, chloride and nitrate ions. According to particular embodiments, the counteranions are acetate ions.
  • the manganese cations can be of valency (II), (III) or (IV).
  • a manganese chloride salt will be included as MnCI 2 .
  • manganese salts having the counteranions defined herein will have manganese ions of valency (II) or (III).
  • the manganese ions are of valency (II).
  • hydrated is well known in the art.
  • metal salts often contain water molecules within a crystal lattice, which remain present in the lattice unless salts are subjected to specific drying steps, for example with heating and/or drying under reduced pressure.
  • optionally hydrated is thus meant that the manganese salts from which the formulations described herein are made may, or may not, comprise such water of crystallisation.
  • Dehydrated manganese salts may thus be used in the preparation of the siccative formulations described herein.
  • partially or fully hydrated metal salts can also be used.
  • manganese (II) acetate and manganese (II) chloride can be bought as tetrahydrate salts or as dehydrated salts.
  • the manganese salt from which the formulations described herein are prepared is selected from the group consisting of manganese(ll) acetate, manganese(ll) nitrate and manganese(ll) chloride, which are optionally hydrated.
  • the manganese salt from which the formulations described herein are made can be introduced (i.e. contacted with the other components from which the formulation is made) as a solid, a suspension or as a solution in OH-containing and/or oxo- containing organic solvent.
  • in situ formation of manganese-chelant complexes is thought to take place upon contact of the manganese salt with the chelant.
  • the formulations described herein are made from (i.e. comprise) an alcohol or a ketone.
  • the formulation may comprise one or more alcohols and/or one or more ketones.
  • the formulation is made from only one or more alcohol or one or more ketone. Even more typically, the formulation is made from only one alcohol or one ketone.
  • an intention behind the inclusion of the alcohol or ketone in the formulations described herein is that they act, at least partially, and preferably completely, to solubilise the chelant(s) and/or manganese salt(s) present in the formulations, at least at 20 °C.
  • the alcohol and/or ketone is thus generally a liquid at this temperature.
  • the alcohol or ketone serves in part to facilitate application of the desired dosage (i.e. quantity) of the manganese salt/chelant mixture to the paint or other oxidatively curable coating composition, the curing of which it is desired to accelerate. Complete dissolution, although advantageous, is not however required.
  • slurries of undissolved or incompletely dissolved chelant(s) and/ manganese salt(s) may be used. Nevertheless, such slurries will typically not be used, since these can lead to undesirably heterogeneous coating compositions according to the third to sixth aspects of the invention.
  • the formulations described herein are generally solutions (at least at ambient temperature), alcohols or ketones with incompletely, that is to say imperfectly, dissolved chelant and/or manganese salt, as manifested by visible turbidity (i.e. a cloudy or opaque liquid with minute quantities of suspended matter), are of use according to the relevant aspects of the present invention.
  • oxidatively curable coating compositions observed with the use of such turbid solutions may arise in part, from further (e.g. complete) dissolution of the manganese salt when the formulations described herein are contacted with, e.g. added to, oxidatively curable coating compositions in accordance with the second aspect of the invention.
  • formulations useful in connection with the present invention focuses on solutions, for example by use of the word solvent to characterise the alcohol or ketone from which these formulations are prepared.
  • the formulations are typically solutions (at least at about 20 °C), the invention is not to be understood to be so limited.
  • the skilled person will be readily able to formulate useful solutions or other formulations of use in the invention by the mixing of appropriate quantities of alcohol or ketone, chelant and manganese salt.
  • the alcohol or ketone will typically comprise from 1 to 6 carbon atoms, typically from 2 to 4 carbon atoms, it being understood that the minimum number of carbon atoms in a ketone is 3.
  • the alcohols or ketones used to make the formulations may contain water, typically arising from the alcohol or ketone being less than completely pure.
  • alcohols or ketones from which the formulations described herein may be made can comprise from 0 to 20 wt% of water. More typically, however, the water content of an alcohol or a ketone used to prepare formulations used in accordance with the invention is less than 10 wt% and still more typically less than 5 wt%.
  • an alcohol that may be useful is commercially available 96% v/v ethanol, in which the majority of the material that is not ethanol is water. Indeed, the large-scale production of most alcohols results in alcohols with water present in them.
  • alcohol By alcohol is meant herein, as the term is customarily used in the art, a compound comprising a saturated carbon atom substituted with a hydroxyl group.
  • the term alcohol does not therefore include within its scope carboxylic acids and enols.
  • monools alcohols having only one hydroxyl group
  • the term alcohol embraces polyhydric alcohols (also known as polyols), by which is meant alcohols comprising 2 or more, typically 2 or 3, hydroxyl groups in which no carbon atom bears more than one hydroxyl group.
  • polyhydric alcohols are diols, polyhydric alcohols commonly known as glycols (for example propylene glycol), or triols (for example glycerol).
  • ketone is meant herein, as the term is customarily used in the art, a compound comprising a carbonyl group, the carbon atom of which is attached to two carbon atoms.
  • the term ketone does not therefore include within its scope aldehydes, esters, amides and the like.
  • the carbon atoms to which the carbonyl group of the ketone is bonded need not be saturated, typically they are, and typically each is a small alkyl group, for example independently a methyl or an ethyl group.
  • ketones are also effective. Without being bound to theory, this possibly arises from in situ hydration with water present in either the ketone used, water of hydration in the manganese salt or otherwise, for example abstracted from the atmosphere or from being present in an oxidatively curable coating composition to which the formulations described herein have typically been contacted.
  • ketones of use according to the invention include acetone and butan-2-one (sometimes referred to as methyl ethyl ketone (MEKO)).
  • MEKO methyl ethyl ketone
  • the formulations described herein comprise an alcohol but not a ketone.
  • the alcohol is, typically an alcohol selected from the group consisting of ethanol, 1 - propanol, 2-propanol, 1 -butanol, 2-butanol, 1 ,2-propyleneglycol, 1 ,3-propyleneglycol, and glycerol. More typically still, the formulations described herein comprise ethanol, 1 ,2-propyleneglycol, 1 ,3-propyleneglycol or glycerol.
  • formulations described herein are obtainable by contacting the three mandatory components thereof, v/z the chelant; alcohol or ketone; and manganese salt. Once such formulations are formed, although they may be defined as comprising these components, it is considered more precise to describe the formulations as obtainable by contacting its three components with each other (analogously to the skilled person not generally understanding a solution resultant from mixing of solutions of hydrochloric acid and sodium hydroxide to "comprise” hydrochloric acid and sodium hydroxide). In particular, at least partial in situ formation of poorly defined complexes is suspected to take place upon contact of the components of the formulation, i.e. by reaction between the components from which the formulations described herein are obtainable.
  • the chelant molecules from which the formulations described herein are prepared may or may not be part of a manganese complex, a characteristic of the formulations also affected by the stoichiometric relationship between the manganese salt and chelant from which the formulations are prepared.
  • complexes formed in situ may comprise manganese ions having a different oxidation state than the manganese ions from which the formulation was initially prepared.
  • the oxidation state of the manganese ions of the salt from which the formulations are prepared may also change upon storage of the formulation and/or upon contact of the formulations with oxidatively curable coating compositions in accordance with the second aspect of the invention and/or application of such an oxidatively curable coating composition to the substrate in accordance with the third aspect of the invention).
  • ESR signals indicative of the presence of dimeric Mn(ll)Mn(ll) species cf.
  • the formulations described herein do not arise from methods in which mixtures resultant from contacting, for example mixing, the salt, the chelant and the alcohol of the ketone are contacted with hydrogen peroxide or a source thereof.
  • a source of hydrogen peroxide namely compounds, or mixtures of compounds that yield hydrogen peroxide. Examples include alkali peroxide, urea-hydrogen peroxide, sodium perborate and sodium percarbonate. Others will be evident to the skilled person. Adding hydrogen peroxide or a source thereof to mixtures of manganese salts, chelants and alcohols ketones is sometimes practised during the preparation of well-defined manganese ion- containing complexes.
  • the formulations used to prepare the oxidatively curable coating compositions thereof are obtainable by a method consisting essentially of contacting with each other a manganese salt, a chelant, and an alcohol or a ketone.
  • the method may comprise additional features, for example the inclusion of additional components or steps when preparing the formulations described herein (except, of course, the additional contract with hydrogen peroxide or a source thereof), provided that such features do not materially affect the essential characteristics of the formulations described herein.
  • a notable essential characteristic of the formulation described herein is that it is of use as a siccative in the curing of oxidatively curable coating compositions. It follows, therefore, that the formulations described herein do not comprise a material amount of oxidatively curable material i.e. such that the formulations described herein are themselves oxidatively curable. Likewise, since the invention provides the advantageous formulation of non-soap manganese salts in alcohol or ketone solvents, it follows that the formulations described herein do not comprise a material amount of either a manganese soap or a material amount of a hydrocarbyl solvent, with which oxidatively curable coating compositions such as alkyd- based formulations are frequently formulated.
  • Typical examples of hydrocarbyl solvents applied in solutions containing siccatives and/or in paint formulations include EXXSOLTM D40 and EXXSOLTM D60. Nevertheless, residual solvent, such as hexane or heptane, resultant from the manufacturing of the chelant may be present in the formulation.
  • the weight ratio of chelant: solvent from the production process, where present, will typically be more than 1 :1 (i.e. the weight of the chelant is more than the weight of the residual solvent), more typically more than 2:1 (i.e. the weight of chelant is more than twice as much as the weight of residual solvent), even more typically more than 3:1 , and often more than 10:1 .
  • formulations useful in accordance with the present invention do not comprise either (i) oxidatively curable material or (ii) a transition metal ion soap (whether a manganese soap or otherwise (e.g. cobalt soap)).
  • the formulations may comprise less than 1 wt% hydrocarbyl solvent, with respect to the weight of the formulation.
  • these formulations do not comprise any of (i) oxidatively curable material, (ii) a transition metal ion soap (whether a manganese soap or otherwise (e.g. cobalt soap)) and (iii) a hydrocarbyl solvent.
  • formulations obtainable by a method consisting essentially of contacting a chelant, a manganese salt and an alcohol or a ketone with each other, these formulations, including formulations that do not comprise oxidatively curable material, a transition metal ion soap (whether a manganese soap or otherwise (e.g. cobalt soap)) and optionally a hydrocarbyl solvent - other components may be present, such as water and inevitable impurities present in the components from which the formulation is prepared.
  • the formulations may comprise from 0 to 20 wt% of water.
  • the water content of the formulations described herein is less than 10 wt% and still more typically less than 5 wt%.
  • formulations not comprising either (i) oxidatively curable material or (ii) a transition metal ion soap (whether a manganese soap or otherwise (e.g. cobalt soap)) may comprise inevitable residual quantities of residual solvent, such as hexane or heptane, resultant from the manufacturing of the chelant.
  • formulations described herein are of particular use in accelerating the curing of oxidatively curable coating compositions, in accordance with the second aspect of the invention, by contacting a formulation described herein with an oxidatively curable coating composition, to provide an oxidatively curable coating composition in accordance with the first aspect of the invention.
  • oxidatively curable coating compositions herein is meant liquids that form a continuous solid coating as a consequence of the course of oxidative reactions (curing) and generally evaporation of a liquid continuous phase (generally solvent). Typically, curing results in formation of cross-linkages and other bond formations through reactions involving unsaturated components within such compositions.
  • the oxidatively curable coating compositions of the invention are alkyd-based.
  • alkyd resins are a well-understood binder class used in film-forming coating compositions, which term is used herein interchangeably with oxidatively curable coating compositions.
  • coating composition is to be interpreted broadly and embraces, for example, varnishes, primary coats, filling pastes and glazes.
  • Coating compositions may be solvent-based or water-based, e.g. emulsions.
  • Typical coating compositions include solvent-based air-drying coatings and/or paints for domestic use.
  • the oxidatively curable coating compositions described herein are paints.
  • paint as used herein means an oxidatively curable coating composition that comprises a pigment.
  • white paint generally comprises the pigment titanium dioxide.
  • coloured paints are provided, in which the colour is typically resultant from the use of a coloured pigment.
  • compositions may comprise inks, for example a metal plate ink, lithographic ink, relief printing ink, screen ink or offset overprinting ink.
  • the major binder present is an alkyd.
  • binder is meant in the art and herein the film-forming (curable) component within oxidatively curable coating compositions, i.e. the component within the compositions that forms the desired three-dimensional network upon curing.
  • the curable component of an oxidatively curable composition e.g. a composition according to the first aspect of the invention
  • At least 50% by weight of the oxidatively curable portion i.e.
  • curable alkyd resin in an oxidatively curable alkyd-based resin, i.e. from about 50% by weight to about 100% by weight, is curable alkyd resin.
  • at least 75% by weight of the binder in an oxidatively curable alkyd-based resin i.e. from about 75% by weight to about 100% by weight (e.g. from about 90% by weight to about 100% by weight) is curable alkyd resin.
  • about 100% by weight of the binder in an oxidatively curable alkyd-based resin is curable alkyd resin.
  • the balance, if any, of the curable i.e.
  • binder component may be, for example, curable acrylate, urethane, polybutadiene and epoxy ester resins.
  • curable binders other than curable alkyds allows the distinct properties of such binders to be introduced to a controllable degree into the ultimate coating resultant from application of a composition, such as an oxidatively curable composition of the first aspect of the invention, or made according to the second aspect of the invention.
  • oxidatively curable alkyd resins are a well-understood and indeed dominant binder in many oxidatively curable paints (both for commercial and domestic use) and other coating compositions. They are employed, in particular, in solvent-based coating compositions.
  • Alkyds are produced by the condensation, typically polycondensation, of polyols with carboxylic acids or anhydrides. To make them susceptible to the so-called drying process, some alkyd resins (i.e. those that are oxidatively curable, present in the composition of the invention) are reacted with unsaturated triglycerides or other source of unsaturation. Plant and vegetable oils, such as linseed oil, are frequently used as the source of triglycerides.
  • the term oxidatively curable alkyd resin thus generally refers in the art, and herein, to polyesters modified with fatty acids.
  • alkyd resins are generally prepared via condensation polymerisation reactions between three types of monomers: (i) one or more polyalcohols (also known as polyols), (ii) one or more polybasic acids (also known as polyacids); and (iii) long chain unsaturated fatty acids or triglyceride oils, which confer upon the alkyds the susceptibility towards curing. Owing to its presence in naturally occurring oils, glycerol is a widely used polyol in the preparation of alkyds.
  • polyalcohols also known as polyols
  • polybasic acids also known as polyacids
  • long chain unsaturated fatty acids or triglyceride oils which confer upon the alkyds the susceptibility towards curing.
  • glycerol is a widely used polyol in the preparation of alkyds.
  • Suitable polyhydric alcohols include: pentaerythritol, dipentaerythritol, ethylene glycol, diethylene glycol, propylene glycol, neopentyl glycol, trimethylol propane, trimethylol ethane, di-trimethylol propane and 1 ,6-hexane diol.
  • Polycarboxylic acids and the corresponding anhydrides, used to synthesise alkyds comprise aromatic, aliphatic and cycloaliphatic components, which are generally derived from petrochemical feedstocks.
  • Typical examples of such polyacids include: phthalic acid and its regio-isomeric analogues, trimellitic acid, pyromellitic acid, pimelic acid, adipic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid and tetra- hydrophthalic acid.
  • Suitable so-called drying and semi-drying fatty acids or mixture thereof, useful herein, are typically ethylenically unsaturated conjugated or non-conjugated C 2 -C 2 4 carboxylic acids, such as oleic, ricinoleic, linoleic, linolenic, licanic acid and eleostearic acids or mixture thereof, typically used in the forms of mixtures of fatty acids derived from natural or synthetic oils.
  • semi-drying and drying fatty acids fatty acids that have the same fatty acid composition as the oils (i.e. the esters) from which they are derived.
  • the classification of the oils is based on the iodine number: for a drying oil the iodine number is >140; for a semi-drying oil the iodine number is ranging between 125 and 140, and for a non-drying oil the iodine number is ⁇ 125 (see “Surface Coatings", part 1 , Chapman & Hall, London, page 55, 1993).
  • oxidatively curable alkyd-based coating compositions are liquids. More typically still, such compositions are solvent-based, that is to say they comprise an organic solvent (which may be a mixture of solvents) for the binder.
  • solvent-based implies to the skilled person in this context compositions that are based on organic (i.e. non-aqueous) solvents, i.e. comprising an organic solvent as a liquid continuous phase.
  • suitable solvents include aliphatic (including alicyclic and branched) hydrocarbons, such as hexane, heptane, octane, cyclohexane, cycloheptane and isoparaffins; aromatic hydrocarbons such as toluene and xylene; ketones, e.g.
  • hexane embraces mixtures of hexanes.
  • the term hexane embraces mixtures of hexanes.
  • the solvent is a hydrocarbyl (i.e. hydrocarbon) solvent, e.g. an aliphatic hydrocarbyl solvent, e.g. solvents comprising mixtures of hydrocarbons.
  • hydrocarbyl i.e. hydrocarbon
  • examples include white spirit and solvents available under the trademarks Shellsol, from Shell Chemicals and Solvesso and Exxsol, from Exxon.
  • oxidatively curable coating compositions are solvent-based, water-based alkyd-based resin compositions and coating compositions are also well known and the compositions described herein may be water-based (i.e. comprise water as a continuous liquid phase). Accordingly, compositions described herein may be of alkyd- based resin compositions in the form of emulsions, and may thus comprise a suitable emulsifier, as is well known in the art.
  • oxidatively curable When an alkyd-based or other oxidatively curable coating composition is referred to herein as "oxidatively curable", it is to be understood that this term is being used to describe a composition susceptible to the reactions that occur between unsaturated group-containing (e.g. carbon-carbon double bond-containing) compounds and oxygen from the air, which reactions constitute oxidative curing and are manifested in hardening and formation of solid coatings obtainable from such compositions.
  • paints or other oxidatively curable coating compositions according to the present invention are compositions capable of oxidative curing, but which have not yet been allowed to cure.
  • the composition of the fourth aspect of the invention is directed towards compositions after curing, i.e. when cured.
  • the formation of the desired coating resultant from curing may be accelerated through the use of catalytic drying, which is achieved according to the present invention by the use of the formulations described herein.
  • the curing of paints or other oxidatively curable coating compositions is typically slow or non-existent in the absence of suitable catalytic driers.
  • the number of manganese ions per chelant molecule may be either 1 or 2. Since the chelant of formula (I) contains two cyclic nitrogen donor moieties (i.e. the two 1 ,4,7-triazacyclononane motifs depicted in formula (I)), each of these motifs may bind to one manganese ion.
  • the resultant complexes in which both of the 1 ,4,7-triazacyclononane motifs are bound to manganese ions, the stoichiometric ratio of chelant of formula (I): manganese ions is 1 :2.
  • complexes can form in which only one of the 1 ,4,7- triazacyclononane motifs is bound to a manganese ion.
  • the stoichiometric ratio of chelant of formula (I): manganese ions is 1 :1 .
  • Complexes comprising chelants of formula (I) may form, for example, if the stoichiometric ratio of chelant of formula (I): manganese ions from which the formulations described herein are prepared is more than 1 :2, for example if a siccative formulation described herein is prepared from equivalent molar amounts of chelant and manganese ions.
  • the typical molar ratio between the manganese ions of the manganese salt and chelant in the formulations described herein is between about 0.2:1 and about 20:1 (i.e. between about 0.2 and about 20), for example between about 0.6:1 and about 6:1 (i.e. between about 0.6 and about 6).
  • the molar ratio between the chelant and the manganese ions will be between about 2:1 .25 and 2.4:1 (i.e. between about 1 .6 and about 2.4).
  • the molar ratio between the chelant and the manganese ions will be approximately 1 :2 (i.e. about 0.5). However, this need not necessarily be the case.
  • a greater molar excess of manganese ions than this may be beneficial to allow some adsorption on solid particles present in oxidatively curable coating compositions, such as pigments and fillers, for example pigments and fillers selected from the group consisting of Ti0 2 , BaS0 4 , talc, silica, Al 2 0 3 and clays, without losing too much siccative activity.
  • pigments and fillers for example pigments and fillers selected from the group consisting of Ti0 2 , BaS0 4 , talc, silica, Al 2 0 3 and clays.
  • a greater stoichiometric amount of chelant may be beneficial to improve regeneration of catalytically active species during curing, which can lead to improved drying (i.e. curing) performance despite using a lower quantity of manganese ions.
  • a greater stoichiometric amount chelant can also be advantageous by reducing the intensity of coloured metal complexes.
  • the skilled person will be able to take into account these considerations when preparing formulations of use according to the invention, depending on the ultimate use to which any given formulations are to be put, for example for use in a paint or other oxidatively curable coating composition.
  • the preferred quantity of manganese ions in the formulation to be applied to the paint or other oxidatively curable coating composition will, of course, depend on the constitution of the paint or other oxidatively curable coating composition and the amount of siccative formulation it is desired to contact with, e.g. add to, the paint or other oxidatively curable coating composition to attain the extent of acceleration of oxidative curing sought.
  • the amount of manganese salt is often expressed as the weight of manganese ions with respect to the weight of the formulation (often expressed as wt%).
  • manganese ions will be present in an amount of between about 0.1 and about 10 wt%, more preferably between 0.3 and 3 wt%.
  • the typical amount of chelant in the formulations described herein (in wt%) will depend on both the amount of manganese ion and the desired molar ratio between chelant and manganese ion.
  • the preferred chelant is 1 ,2-bis-(4,7- dimethyl-1 ,4,7,-triazacyclonon-1 -yl)-ethane (Me 4 -DTNE), which has a molecular weight of 340 g/mol
  • the level of manganese ion is 2 wt% in the formulation
  • a manufacturer of a paint or other oxidatively curable alkyd-based resin composition can determine the optimum amount of manganese salt-chelant mixture as defined above, to contact with (e.g. add to) an oxidatively curable coating composition, e.g. an oxidatively curable alkyd-based coating composition.
  • the optimal amount to be added may depend on the type of alkyd-resin used, other additives present, the amount of chelant with respect to manganese present, or the type of application.
  • the desired level of manganese will be between 0.0001 and 0.3 wt%, with more typical levels between 0.0005 and 0.2 wt%, with more typical levels still between 0.001 and 0.1 wt%, for example levels of between 0.003 and 0.05 wt%, such as levels between 0.005 and 0.03 wt% (all with respect to the amount of oxidatively curable material in the composition).
  • % by weight with respect to oxidatively curable coating compositions are referred to herein (% by weight, wt % or % w/w), these mean, unless a context clearly dictates to the contrary, percentages by weight with respect to the binder component (i.e. the alkyd-based resin and any other binders present).
  • the binder component i.e. the alkyd-based resin and any other binders present.
  • the combined weights of the binders are those with respect to which weight percentages herein concerning oxidatively curable coating compositions are based.
  • a composition of the first aspect or made according to the second aspect of the invention typically comprises about 0.01 % w/w manganese ions, this is with respect to the weight of the curable components of the composition (i.e. the weight of the binder(s)).
  • concentrations of manganese ions in the presence of appropriate stoichiometries of the chelants of formula (I) described herein give useful catalytic enhancement of oxidative curing.
  • a formulation described herein or oxidatively curable coating composition of the invention can, and generally will, be used in the manufacture of a fully formulated oxidatively curable coating composition.
  • the term "fully formulated oxidatively curable coating composition” means, as will be understood by those of skill in the art, oxidatively curable compositions that comprise additional components over and above the binder (the oxidatively curable material, which is alkyd-based according to the present invention), an aqueous or non-aqueous solvent/liquid continuous phase and any metal driers intended to accelerate the curing process (herein provided by the siccative formulations described herein).
  • Such additional components are generally included so as to confer desirable properties upon the coating composition, such as colour or other visual characteristics such as glossiness or mattness), physical, chemical and even biological stability (enhanced biological stability being conferred upon coating compositions by the use of biocides for example), or modified texture, plasticity, adhesion and viscosity.
  • such optional additional components may be selected from solvents, antioxidants (sometimes referred to as antiskinning agents), additional siccatives (i.e. not comprising chelants of formula (I)), auxiliary driers, colourants (including inks and coloured pigments), fillers, plasticisers, viscosity modifiers, UV light absorbers, stabilisers, antistatic agents, flame retardants, lubricants, emulsifiers (in particular where an oxidatively curable coating composition of the invention is aqueous- based), anti-foaming agents, viscosity modifiers, antifouling agents, biocides (e.g.
  • oxidatively curable coating compositions prepared in accordance with embodiments of the method of the second aspect of the invention will comprise at least an organic solvent, selected from the list of solvents described above (within the discussion of what "solvent-based” implies to the skilled person in the context of solvent-based oxidatively curable alkyd- based coating compositions) and a filler, and generally an antiskinning agent, in addition to the alkyd and optionally other binders and chelant present in the oxidatively curable coating composition of the invention.
  • solvents described above within the discussion of what "solvent-based” implies to the skilled person in the context of solvent-based oxidatively curable alkyd- based coating compositions
  • a filler and generally an antiskinning agent, in addition to the alkyd and optionally other binders and chelant present in the oxidatively curable coating composition of the invention.
  • an antiskinning agent in addition to the alkyd and optionally other binders and chelant present in the oxidative
  • any additional components possess more than one functional property.
  • some fillers may also function as colourants.
  • the nature of any additional components and the amounts used may be determined in accordance with the knowledge of those of skill in the art and will depend on the application for which the curable coating compositions are intended. Examples are provided below but these are intended to be illustrative, not limitative.
  • one or more antioxidants are often included to avoid premature curing of the oxidatively curable coating composition prior to its use.
  • Such premature curing may be manifested by, for example, the formation of a skin on or lumpy matter in the oxidatively curable coating composition as a result of curing during storage, for example hardening of the surface of a paint layer in a can, owing to the activity of the siccative with oxygen on the oxidatively curable binder.
  • Antiskinning agents are understood to reduce skinning by quenching radicals formed and/or by inactivation of drier catalysts by binding to one or more of the coordination sites.
  • Examples include, but are not limited to, methylethylketoxime, acetonoxime, butyraldoxime, methyl-isobutylketoxime, 2- cyclohexylphenol, 4-cyclohexylphenol, t-butyl-hydroquinone, dialkylhydroxylamine, acetylacetonate, ammonia, vitamin E (tocopherol), hydroxylamine, triethylamine, dimethylethanolamine, 2-t-butyl-4-methylphenol, and 2-[(1 -methylpropyl)amino]ethanol.
  • the antiskinning agent is selected from the group consisting of methylethylketone-oxime, acetonoxime, butyraldoxime, dialkylhydroxylamine, ammonia, hydroxylamine, triethylamine, dimethylethanolamine, o-cyclohexylphenol, p-cyclohexylphenol and 2-t-butyl-4-methylphenol.
  • the quantity of antiskinning agent present in an oxidatively curable coating composition is typically between about 0.001 and about 2.5 wt%.
  • the antioxidant or antiskinning agent may be contacted with, e.g. added to, an oxidatively curable alkyd- based resin coating composition, together with (or separately from) a siccative formulation described herein prior to or during the preparation of a fully formulated oxidatively curable coating composition (for example a paint or other coating composition).
  • Colourants include pigments and inks. Titanium dioxide is a pigment commonly included in many coating compositions, in particular paints.
  • Fillers may be added to an oxidatively curable coating composition for a number of reasons, for example to bulk out the coating composition and/or to compare particular properties on the cured composition.
  • fillers will be inorganic solids that are generally introduced in particulate (finely divided) form. Examples include silica, silicates or clays (for example mica, talc, kaolin), carbonate or other minerals and metal salts or oxides (such as marble, quartzite). Other suitable fillers will be evident to the skilled person.
  • a paint manufacturer for example, to add other commercial metal-soap/chelant mixtures to an oxidatively curable coating composition of the invention, such as the non-limiting example of Borchers® Dry 0410 (a mixture of 2,2'-bipyridine (bpy) with Mn(neodecanoate) 2 commercially available from OMG), as a mixture of bpy with Mn(neodecanoate) 2 .
  • Borchers® Dry 0410 a mixture of 2,2'-bipyridine (bpy) with Mn(neodecanoate) 2 commercially available from OMG
  • auxiliary driers may be added to a fully formulated oxidatively curable coating composition.
  • auxiliary driers include fatty acid soaps of zirconium, bismuth, barium, cerium, calcium, lithium, strontium, and zinc.
  • fatty acid soaps are optionally substituted octanoates, hexanoates and naphthenates.
  • auxiliary driers (sometimes referred to as through driers) are generally understood to diminish the effect of adsorption of the main drier on solid particles often present in an oxidatively curable coating composition.
  • Other non- metal based auxiliary driers may also be present if desired.
  • auxiliary driers within oxidatively curable coating compositions are typically between about 0.01 wt% and 2.5 wt% as is known in the art.
  • the oxidatively curable coating compositions of the invention may be used as a decorative coating for a natural or synthetic substrate.
  • these may be applied to wood substrates, such as door or window frames, or for other substrates such as those made of synthetic materials (such as plastics including elastomeric materials), concrete, leather, textile, glass, ceramic or metal, in accordance with the third aspect of the invention.
  • the thus-applied composition may then be allowed to cure.
  • the fourth aspect of the invention is directed towards a composition according to the first aspect of the invention, or obtainable according to the second aspect of the invention, when cured.
  • An oxidatively curable alkyd-based coating composition that has been contacted with a formulation obtainable by a method comprising contacting the following components:
  • a manganese ion-containing salt comprising a manganese ion having a valency of (II), (III) or (IV) and a counteranion selected from the group consisting of acetate, chloride, nitrate, formate, propionate, bromide, carbonate, acetylacetonate and sulfate;
  • each R is independently selected from the group consisting of hydrogen, C 1 -C 24 alkyl, CH 2 CH 2 OH, CH 2 COOH and pyridine-2-ylmethyl; and Q is a C 2 -C 6 alkylene bridge, a C 6 -C 10 arylene bridge or a bridge comprising one or two C C 3 alkylene units and one C 6 -C 10 arylene unit, which bridge may be optionally substituted one or more times with independently selected CrC 24 alkyl groups; and
  • each R R 2 , R 3 , and R 4 is independently selected from hydrogen, CrC ⁇ alkyl and CrC ⁇ alkylhydroxy;
  • the method not comprising contact of the mixture resultant from contacting of the salt, the chelant and the alcohol or the ketone with hydrogen peroxide or a source thereof.
  • composition of clause 1 wherein the manganese ion has a valency of (II).
  • the counteranion is selected from the group consisting of acetate, chloride, nitrate, formate, propionate, bromide, carbonate and acetylacetonate.
  • composition of any one preceding clause, wherein the counteranion is selected from the group consisting of acetate, chloride and nitrate.
  • composition of clause 1 wherein the salt is selected from optionally hydrated Mn(ll)(acetate) 2 , Mn(ll)CI 2 and Mn(ll)(N0 3 ) 2 .
  • each R is independently selected from the group consisting of hydrogen, C 1 -C 24 alkyl and pyridine-2- ylmethyl.
  • each R is independently selected from the group consisting of CrCesalkyl.
  • composition of clause 17, wherein the chelant of formula (I) is selected from the group consisting of 1 ,2-bis-(4,7-dimethyl-1 ,4,7,-triazacyclonon-1 -yl)- ethane, 1 ,3-bis-(4,7-dimethyl-1 ,4,7,-triazacyclonon-1 -yl)-propane and 1 ,4-bis- (4,7-dimethyl-1 ,4,7,-triazacyclonon-1 -yl)-butane.
  • composition of any one preceding clause, wherein the chelant is 1 ,2-bis- (4,7-dimethyl-1 ,4,7,-triazacyclonon-1 -yl)-ethane.
  • composition of clause 22, wherein the molar ratio of manganese ions to chelant in the formulation is between about 0.6 and about 6.
  • composition of clause 22, wherein the molar ratio of manganese ions to chelant in the formulation is between about 1 .6 and about 2.4.
  • composition of clause 22, wherein the molar ratio of manganese ions to chelant in the formulation is about 2.
  • composition of any one preceding clause, wherein the formulation is obtainable by a method consisting essentially of contacting the salt, the chelant and the alcohol and/or ketone with each other.
  • composition of any one preceding clause wherein the formulation does not comprise any oxidatively curable material.
  • composition of any one preceding clause, wherein the formulation comprises an alcohol comprises an alcohol.
  • composition of clause 33 wherein the alcohol comprises from 1 to 3 hydroxyl groups.
  • composition of clause 34 wherein the alcohol is selected from the group consisting of methanol, ethanol, glycerol, 1 -propanol, 2-propanol, 1 -butanol, 2- butanol, 1 ,2-propyleneglycol and 1 ,3-propyleneglycol.
  • composition of clause 34 wherein the alcohol is selected from the group consisting of ethanol, 1 ,2-propyleneglycol, 1 ,3-propyleneglycol and glycerol.
  • composition of clause 38 wherein the ketone is selected from the group consisting of acetone and 2-butanone. 40. The composition of any one preceding clause, wherein the formulation is a solution at about 20 °C.
  • composition of any one preceding clause wherein between about 90% by weight and about 100% by weight of curable binder in the composition is oxidatively curable alkyd resin.
  • composition of any one preceding clause which comprises between about 0.0001 and about 0.3 wt% manganese ions with respect to the weight of curable components in the composition.
  • composition of clause 43 which comprises between about 0.0005 and about 0.2 wt% manganese ions with respect to the weight of curable components in the composition.
  • composition of clause 44 which comprises between about 0.001 and about 0.1 wt% manganese ions with respect to the weight of curable components in the composition.
  • composition of clause 45 which comprises between about 0.003 and about 0.05 wt% manganese ions with respect to the weight of curable components in the composition.
  • a method comprising applying an oxidatively curable coating composition as defined in any one of clauses 1 to 47, or obtainable according to the method of clause 48, to a substrate.
  • Me 3 -TACN (1 ,4,7-trimethyl-1 ,4,7-triazacyclononane) (95%) is a product of Catexel Ltd and was obtained as disclosed elsewhere (see US patent number 5,284,944 (Madison et al.).
  • the chelant 1 ,2-bis-(4,7,-dimethyl-1 ,4,7,-triazacyclonon-1 -yl)-ethane (Me 4 - DTNE) purity level of 92.4% w/w
  • WO 2012/003712 Unilever PLC et al.
  • Alkyd resin (catalogue number A/1552/15; an alkyd resin solution of 70 wt% in white spirits) was obtained from Acros Organics.
  • Manganese(ll) acetate tetrahydrate (abbreviated as Mn(OAc) 2 .4H 2 0), manganese(lll) acetate dihydrate (abbreviated as Mn(OAc) 3 .2H 2 0) and manganese(ll) nitrate tetrahydrate (abbreviated as Mn(N0 3 ) 2 .4H 2 0) were obtained from Aldrich.
  • Manganese chloride tetrahydrate (abbreviated as MnCI 2 .4H 2 0) was obtained from Fluka.
  • Propylene glycol, ethanol (96%), 1 -propanol, 2-butanone and methanol were obtained from Merck.
  • 2-propanol, iso-butanol and acetone were obtained from VWR/Prolabo.
  • Glycerol was obtained from Sigma-Aldrich.
  • Shellsol D60 was obtained from Caldic Nederland.

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Abstract

La présente invention concerne une composition de revêtement durcissable par oxydation avec laquelle une formulation destinée à catalyser le durcissement de compositions de revêtement durcissables par oxydation, en particulier des compositions de revêtement durcissables par oxydation comprenant une résine à base d'alkyle durcissable par oxydation, a été mise en contact. Les formulations décrites ici comprennent un chélateur à base de triazacyclononane ; un sel de manganèse (II), (III) ou (IV) ; et un alcool ou une cétone, l'alcool ou la cétone agissant typiquement comme un solvant pour le sel et le chélateur. L'invention concerne également la préparation des compositions de revêtement durcissables par oxydation de l'invention, de telles compositions de revêtement une fois durcies et des procédés consistant à appliquer de telles compositions de revêtement sur un substrat.
PCT/GB2015/050223 2014-01-31 2015-01-30 Composition WO2015114352A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007030389A2 (fr) * 2005-09-06 2007-03-15 Novus International Inc. Compositions de peinture marine antisalissure
EP1772502A1 (fr) * 2005-10-07 2007-04-11 DSMIP Assets B.V. Composition séchant par oxydation, comprenant des composés 1,2 dioxo utilisé dans des couches minces
WO2008003652A1 (fr) * 2006-07-07 2008-01-10 Unilever Plc Durcissement d'un liquide
CN101284965A (zh) * 2007-04-10 2008-10-15 樊官保 等同于雕刻凹版油墨的水性凹版油墨及其应用
US20120027958A1 (en) * 2010-07-28 2012-02-02 Jagdip Thaker Reaction-based laser marking compositions, systems and methods
WO2013045475A1 (fr) * 2011-09-26 2013-04-04 Ppg Europe Bv Composition de revêtement et son utilisation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007030389A2 (fr) * 2005-09-06 2007-03-15 Novus International Inc. Compositions de peinture marine antisalissure
EP1772502A1 (fr) * 2005-10-07 2007-04-11 DSMIP Assets B.V. Composition séchant par oxydation, comprenant des composés 1,2 dioxo utilisé dans des couches minces
WO2008003652A1 (fr) * 2006-07-07 2008-01-10 Unilever Plc Durcissement d'un liquide
CN101284965A (zh) * 2007-04-10 2008-10-15 樊官保 等同于雕刻凹版油墨的水性凹版油墨及其应用
US20120027958A1 (en) * 2010-07-28 2012-02-02 Jagdip Thaker Reaction-based laser marking compositions, systems and methods
WO2013045475A1 (fr) * 2011-09-26 2013-04-04 Ppg Europe Bv Composition de revêtement et son utilisation

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