EP1620444A1 - Silanes a fonction epoxy, leurs procedes de production et leur utilisation - Google Patents

Silanes a fonction epoxy, leurs procedes de production et leur utilisation

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Publication number
EP1620444A1
EP1620444A1 EP04739101A EP04739101A EP1620444A1 EP 1620444 A1 EP1620444 A1 EP 1620444A1 EP 04739101 A EP04739101 A EP 04739101A EP 04739101 A EP04739101 A EP 04739101A EP 1620444 A1 EP1620444 A1 EP 1620444A1
Authority
EP
European Patent Office
Prior art keywords
group
general formula
silanes
unsubstituted
substituted
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.)
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Application number
EP04739101A
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German (de)
English (en)
Inventor
Andreas Poppe
Elke Westhoff
Wilfried STÜBBE
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.)
BASF Coatings GmbH
Original Assignee
BASF Coatings GmbH
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Filing date
Publication date
Application filed by BASF Coatings GmbH filed Critical BASF Coatings GmbH
Publication of EP1620444A1 publication Critical patent/EP1620444A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
    • C07F7/1804—Compounds having Si-O-C linkages

Definitions

  • Epoxy functional silanes process for their preparation and their use
  • the present invention relates to new epoxy-functional silanes.
  • the present invention also relates to new processes for the preparation of epoxy-functional silanes.
  • the present invention relates to the use of the new epoxy-functional silanes for the production of new condensates, in particular in a new sol-gel process.
  • the present invention relates to the use of the new epoxy-functional silanes as new curable compositions or for their preparation.
  • the present invention relates to the use of the new curable compositions for the production of new cured compositions, in particular coatings and coatings, and of molded parts, in particular optical molded parts, and of self-supporting films.
  • Thermally curable compositions based on condensates of epoxy-functional silanes which contain no urethane groups are known from patent applications EP 1 179 575 A 2, WO 00/35599 A, WO 99/52964 A, WO 99/54412 A, DE 197 26 829 A 1 or DE 19540 623 A1. They are used in particular for the production of highly scratch-resistant coatings. It is essential that external catalysts or starters for the conversion of the epoxy groups (cf., for example, WO 99/52964 A, page 8, line 29, to page 9, line 20) must be added to these known thermally curable compositions so that the Cure masses at comparatively low temperatures of 100 to 160 ° C at a practical speed. However, the use of external catalysts has numerous disadvantages.
  • binders are added to the known, thermally curable compositions, which are usually present in aqueous-alcoholic media, which are stable in these media. These binders are preferably in the form of aqueous dispersions. However, these often show a strong interaction with the catalysts used, so that they cannot be used together. This eliminates numerous conceivable possibilities for advantageously modifying the known thermally curable compositions.
  • the variables R can be the same or different and represent alkyl, alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkynyl or alkynylaryl, these radicals being represented by oxygen or sulfur atoms or the groups -NR- or -N (H ) C (O) O- (urethane) can be interrupted and one or more substituents from the group of the halogens and the optionally substituted amino, amide, aldehyde, keto, alkylcarbonyl, carboxy, mercapto, cyano - Can carry hydroxy, alkoxy, aikoxycarbonyl, sulfonic acid, phosphoric acid, methacryloxy, epoxy or vinyl groups.
  • variable Y stands for blocked isocyanate groups.
  • indices m and n stand for integers from 1 to 3.
  • n stands for an integer from 1 to 4.
  • the variables X and R have the meaning given above.
  • the variable Z stands for hydroxyl, amino, NH (CH 2 ) 2NH 2 or epoxy groups. Accordingly, a myriad of compounds fall under the general formula i, which can also be combined with an equally large number of compounds of the general formula ii.
  • thermally curable compositions provide scratch-resistant hardened compositions, but their chemical resistance leaves much to be desired.
  • the known epoxy-functional silanes and the condensates and thermally curable compositions produced therefrom frequently contain ether groups, so that the cured compositions prepared from the known thermally curable compositions, in addition to insufficient chemical resistance, also insufficient resistance to actinic radiation, in particular UV radiation , exhibit.
  • the object of the present invention was to provide new epoxy-functional silanes.
  • the new epoxy-functional silanes should be easy to produce and very reproducible.
  • the new epoxy-functional silanes are also said to be very suitable for the production of new condensates, especially in a sol-gel process.
  • the new epoxy-functional silanes and their new condensates are said to be more widely applicable than the known epoxy-functional silanes and their condensates.
  • the new epoxy-functional silanes and / or their new condensates are said to be outstandingly suitable as curable compositions or for their preparation.
  • the new curable compositions based on the new epoxy-functional silanes and / or their new condensates should no longer have the disadvantages of the prior art, but should also be able to cure rapidly at relatively low temperatures without external catalysts or starters.
  • the new curable compositions should provide cured compositions, in particular coatings and coatings, as well as moldings, in particular optical moldings, and self-supporting films, which are not only highly scratch-resistant, high-gloss, flexible, transparent and clear, but also chemical-resistant and resistant to actinic radiation, especially UV -Radiation, are.
  • the new hardened masses in particular the coatings and the paintwork, in dry layer thicknesses> 30 ⁇ m should no longer show stress cracks and no delamination from the substrates and should therefore be more widely applicable than the previously known curable masses based on condensates epoxy functional silanes. In particular, they are said to be suitable for the production of clearcoats for primary automotive painting.
  • R substituted or unsubstituted, non-hydrolyzable, monovalent, organic group containing no epoxy group;
  • R 1 substituted or unsubstituted, linking, divalent organic group;
  • R 2 substituted or unsubstituted, linking, (p + 1) -bi ⁇ ige, organic group;
  • R 3 substituted or unsubstituted, non-hydrolyzable, monovalent organic group containing at least one epoxy group
  • X the same or different from each other: oxygen atom or sulfur atom;
  • R 4 identical or different from one another: hydrogen atom
  • silanes I The new epoxy-functional silanes of the general formula I are referred to below as “silanes I according to the invention”.
  • variable and the indices have the meaning given above, with r equivalents of at least one compound of the general formula VIII:
  • process 1 The new process for the preparation of the silanes I according to the invention is referred to below as "process 1 according to the invention".
  • process 2 the new process for the preparation of the silanes I according to the invention.
  • process 3 the new process for the preparation of the silanes I according to the invention.
  • silanes I according to the invention were particularly easy to produce and reproducible.
  • silanes I according to the invention were outstandingly suitable for the production of condensates according to the invention, in particular in a new sol-gel process.
  • silanes I according to the invention and the condensates according to the invention were applicable much more widely than the known epoxy-functional silanes and their condensates.
  • the silanes I according to the invention and / or the condensates according to the invention were outstandingly suitable as new curable compositions or for their preparation.
  • the curable compositions according to the invention based on the silanes I and / or condensates no longer had the disadvantages of the prior art, but rather could be cured quickly at relatively low temperatures even without external catalysts or starters.
  • the curable compositions according to the invention provided new cured compositions, in particular new coatings and coatings, as well as moldings, in particular optical moldings, and self-supporting foils which are not only highly scratch-resistant, high-gloss, flexible, transparent and clear, but also chemical-resistant and resistant to actinic radiation, in particular UV -Radiation, were.
  • the new hardened masses especially the coatings and paints, no longer showed stress cracks and no delamination from the substrates in dry layer thicknesses> 30 ⁇ m and were therefore much more widely applicable than the previously known hardenable masses based on condensates of known epoxy-functional silanes , In particular, they were outstandingly suitable for the production of clear coats for the automotive OEM painting.
  • autocatalyzed means that the curing, in particular the thermal curing, of the curable, in particular thermally curable, compositions according to the invention is catalyzed by starting products and / or intermediates which are formed during the curing, in particular the thermal curing (cf. Römpp Online, Georg Thieme Verlag, Stuttgart, 2002, “Autocatalysis”).
  • external catalysts or starters are understood to mean substances which are usually the
  • Epoxy resin systems «, pages 263 to 269). More examples from
  • Catalysts of this type which are also in curable, in particular thermally curable, compositions based on epoxy-functional condensates
  • Silanes are used, for example, from international patent application WO 99/52964 A, page 8, line 29, to page 9, line 20, or German patent application DE 197 26 829 A1, column 3, line
  • “free from external catalysts” means that the compositions according to the invention do not contain any external catalysts or only those amounts thereof which do not shape the property profile of the compositions according to the invention, but at most have an insignificant effect.
  • a sol-gel process is understood as the hydrolysis / condensation process described in Römpp Online, Georg Thieme Verlag, Stuttgart, 2002, “Sol-gel process”.
  • “Hydrolysable atoms or groups” in the sense of the invention are atoms or groups that are reactive in the sol-gel process. Accordingly, non-hydrolyzable groups do not participate in the sol-gel process.
  • electromagnetic radiation such as near infrared (NIR), visible light, UV radiation, X-rays or gamma radiation, in particular UV radiation, or corpuscular radiation, such as electron radiation, beta radiation, proton radiation, neutron radiation or alpha radiation, in particular, is used under actinic radiation Electron radiation, understood.
  • NIR near infrared
  • UV radiation UV radiation
  • X-rays or gamma radiation in particular UV radiation
  • corpuscular radiation such as electron radiation, beta radiation, proton radiation, neutron radiation or alpha radiation
  • Electron radiation understood.
  • silanes I according to the invention have the general formula I:
  • the indices stand for zero or whole numbers, in particular from 1 to 4, with the following conditions applying:
  • At least one of the conditions preferably applies:
  • variable Z means a hydrolyzable atom, a hydroxyl group or a hydrolyzable, monovalent, substituted or unsubstituted, in particular organic, group.
  • the hydrolyzable atom Z is preferably selected from the group consisting of hydrogen atoms, fluorine atoms, chlorine atoms, bromine atoms and iodine atoms.
  • the hydrolyzable, monovalent, unsubstituted or unsubstituted, organic group Z preferably has the general formula VI:
  • variable W stands for an oxygen atom, sulfur atom, a carbonyl group or a carboxyl group, in particular for an oxygen atom.
  • variable R 5 stands for a monovalent organic radical which has at least one, in particular one, group selected from the group consisting of substituted and unsubstituted, preferably unsubstituted, branched and unbranched, preferably unbranched, cyclic and non-cyclic, preferably non-cyclic, alkyl, alkenyl and alkynyl as well as substituted and unsubstituted, preferably unsubstituted, aryl groups, or consists thereof, in particular unbranched alkyl groups with 1 to 4 carbon atoms are used.
  • Hydroxyl groups and / or groups of the general formula VI preferably methoxy, ethoxy, propoxy and
  • Butoxyl groups especially methoxy and ethoxy groups, are used as hydrolyzable groups Z.
  • variable R stands for a substituted or unsubstituted, in particular unsubstituted, non-hydrolyzable, single-bonded, organic group which contains no epoxy group.
  • the group R preferably contains at least one, in particular one, group selected from the group consisting of substituted and unsubstituted, preferably unsubstituted, branched and unbranched, preferably unbranched, cyclic and non-cyclic, preferably non-cyclic, alkyl, alkenyl and alkynyl groups , preferably alkyl groups, and substituted and unsubstituted, preferably unsubstituted, aryl groups, or consists thereof.
  • Unbranched alkyl groups with 1 to 4 carbon atoms, in particular methyl and ethyl groups, are preferably used.
  • the variable R 1 stands for a substituted or unsubstituted, preferably unsubstituted, linking, divalent organic group.
  • the group R 1 preferably contains at least one, in particular one, group selected from the group consisting of substituted and unsubstituted, preferably unsubstituted, branched and unbranched, preferably unbranched, cyclic and non-cyclic, preferably non-cyclic, alkyl, alkenyl and Alkynyl groups and substituted and unsubstituted, preferably unsubstituted, aryl groups, or it consists thereof.
  • the group R 1 is an unbranched, non-cyclic, unsubstituted, divalent alkyl group having 1 to 10, preferably 2 to 6 and in particular 2 to 4 carbon atoms, such as an ethylene, trimethylene or tetramethylene group.
  • variable R 2 stands for a substituted or unsubstituted, preferably unsubstituted, linking, (p + 1) -binding, preferably divalent or trivalent, organic group.
  • the group R 2 preferably contains at least one, in particular one, group selected from the group consisting of substituted and unsubstituted, preferably unsubstituted, branched and unbranched, cyclic and non-cyclic alkyl, alkenyl and alkynyl groups, preferably alkyl groups, and substituted and unsubstituted, preferably unsubstituted, aryl groups, or consists thereof.
  • suitable groups R 2 are ethylene, trimethylene or tetramethylene groups, cyclohexane-1, 2-, -1, 3- and -1, 4-diyl groups, 1,2-, 1,3- and 1,4- Phenylene groups, propane-1, 2,3-triyl groups, cyclohexane-1,2,3-, -1, 2,4- and -1, 3,5-triyl groups and benzene-1, 2,2- , -1, 2,4- and -1, 3,5-triyl groups.
  • the variable R 3 stands for a substituted or unsubstituted, preferably unsubstituted, non-hydrolyzable, single-bonded, organic group containing at least one, in particular one, epoxy group.
  • the epoxy group is preferably terminal.
  • the group R 3 preferably contains at least one, in particular one, group selected from the group consisting of substituted and unsubstituted, preferably unsubstituted, branched and unbranched, cyclic and non-cyclic, alkyl, alkenyl and alkynyl groups, preferably alkyl groups, and substituted groups and unsubstituted, preferably unsubstituted, aryl groups, or consists thereof.
  • suitable groups R 3 are 3,4-epoxycyclohex-1-yl, 2- (methylene) oxirane and 2- (phen-1, 4-ylene) oxirane groups.
  • variable X stands for an oxygen atom and / or a sulfur atom.
  • a variable X in a given part of the molecule can be an oxygen atom or a " sulfur atom, although independently in another part of the molecule a variable X can stand for an oxygen atom or a sulfur atom.
  • Only carbonyl groups or thiocarbonyl groups or carbonyl groups and thiocarbonyl groups may be present in silane I.
  • all variables X stand for oxygen atoms.
  • the variable G is a substituted or unsubstituted, (r + s) -valent, preferably divalent or trivalent, especially divalent "organic group.
  • the group G preferably contains at least one, in particular one, group selected from the group consisting of substituted and unsubstituted, preferably unsubstituted, branched and unbranched, cyclic and non-cyclic alkyl, alkenyl and alkynyl groups, preferably alkyl groups, and substituted and unsubstituted , preferably unsubstituted, aryl groups, or it consists thereof.
  • Group G preferably contains at least one, in particular one, cyclic group or consists thereof.
  • Group G or the cyclic group (s) contained in group G is or are particularly preferred from the group consisting of substituted and unsubstituted, heteroatoms containing and free of heteroatoms, saturated and unsaturated, cycloaliphatic groups and substituted and unsubstituted, heteroatom-containing and heteroatom-free aromatic groups.
  • heteroatoms examples include nitrogen atoms, phosphorus atoms, oxygen atoms and sulfur atoms, preferably nitrogen atoms and oxygen atoms.
  • Group G or the cyclic group (s) contained in group G is or are very particularly preferably selected from the group consisting of substituted and unsubstituted, saturated, cycloaliphatic groups free of heteroatoms and free of heteroatoms, substituted and unsubstituted, especially unsubstituted, aromatic groups.
  • the heteroatom-free, saturated, cycloaliphatic groups of cycloaliphatic compounds are selected from the group consisting of substituted and unsubstituted, monocyclic, bicyclic, tricyclic and tetracyclic bridging compounds and spirocyclic
  • the aromatic groups free of heteroatoms are derived from aromatic compounds selected from the group consisting of substituted and unsubstituted, monocyclic and polycyclic, condensed and uncondensed aromatics.
  • substituted and unsubstituted, monocyclic, bicyclic, tricyclic and tetracyclic bridge compounds and spirocyclic compounds from the group consisting of cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, p-menthan, m-menthan, o-menthan, 1, 1, 2,3-tetramethylcyclohexane, 1, 1, 3,3-tetramethylcyclohexane, thujan, carane, pinane, bornan, norcarane, norpinane, norbornane, camphane, 2-ethylpinane, 2,4,7,7- Tetramethyl-norcaran, 2,2-dimethyl-norbornane,
  • the monocyclic and polycyclic, condensed and uncondensed aromatics from the group consisting of benzene, toluene, xylene, tetramethylxylene, biphenyl, diphenylmethane, 2,2-diphenylpropane, 1, 2 -, 1, 3- or 1, 4- Diphenybenzenes (terphenylene), positionally isomeric quaterphenylenes, 1,3,5-triphenylbenzene, naphthalene, acenaphthylene, acenaphthene, phenanthrene, fluorene, anthracene, chrysene, pyrene and fluoranthene; in particular benzene, toluene, tetramethylxylene, diphenylmethane and 2,2-diphenylpropane selected.
  • the groups Z, R, R 1 , R 2 , R 3 , R 4 , R 5 and G and the group R 6 described below can also be substituted, ie contain other substituents than alkyl, cycloalkyl or aryl groups. It is essential here that these other substituents are inert in the sense that they do not interfere with the production of the silanes I according to the invention, the sol-gel process or the use of the silanes I according to the invention, for example crosslinking via the epoxy groups, in particular that they do not inhibit these reactions, start them early or lead to undesirable by-products.
  • Suitable other substituents are halogen atoms, in particular fluorine atoms, nitrile groups, blocked isocyanate groups which do not deblock at the temperatures at which the silanes I according to the invention are prepared and / or used, alkoxy groups or alkoxycarbonyl groups.
  • the groups Z, R, R 1 , R 2 , R 3 , R 4 , R 5 and G and the group R 6 described below can also comprise at least one, preferably one, double-bonded, linking functional group selected from the group from ether, thioether, carboxylic acid ester, thiocarboxylic acid ester, carbonate, thiocarbonate, phosphoric acid ester, Thiophosphoric esters, phosphonic esters,
  • the double-bonded functional groups are inert in the sense that they do not interfere with, in particular, the production of the silanes I according to the invention, the sol-gel process or the use of the silanes I according to the invention, for example crosslinking via the epoxy groups that they do not inhibit these reactions, start them prematurely or lead to undesirable by-products.
  • the silanes I according to the invention can be prepared by the customary and known processes in organic and organosilicon chemistry.
  • the silanes I according to the invention are preferably prepared by the processes according to the invention.
  • suitable polyisocyanates of the general formula VII are the polyisocyanates, preferably the tri and diisocyanates, in particular the diisocyanates, of the acyclic and cyclic, in particular cyclic, compounds described above, of which the groups G or the acyclic and cyclic compounds contained in the groups G are especially cyclic, derived groups.
  • Suitable acyclic diisocyanates to be used according to the invention are trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate,
  • Ethyl ethylene diisocyanate or trimethyl hexane diisocyanate Ethyl ethylene diisocyanate or trimethyl hexane diisocyanate.
  • Suitable cyclic diisocyanates to be preferably used according to the invention are cyclohexane, dicyclohexylmethane and 2,2-dicyclohexylpropane diisocyanate, 5-isocyanato-1-isocyanatomethyl-1, 3,3-trimethyl-cyclohexane (isophorone diisocyanate, IPDI), diisocyanates derived from dimer fatty acids, as sold under the trade name DDI 1410 by the Henkel company and described in the patents WO 97/49745 A 1 and WO 97/49747 A 1, in particular 2-hepty] -3,4-bis (9-isocyanatononyl) -1 -pentyl-cyclohexane.
  • Examples of suitable compounds of the general formula VIII are 2-hydroxyethyltrimethoxysilane, 2-hydroxyethyltriethoxysilane, 3-
  • bonds of the general formula IX are glycidol, 1-hydroxy-3,4-epoxy-cyclohexane and 2- (4-hydroxyphenyl) oxirane, in particular glycidol.
  • Monoiso (thio) cyanate in particular a monoisocyanate, of the general formula XI:
  • Suitable compounds of the general formula X are diols, such as 1, 2-, 1, 3- and 1,4-dihydroxycyclohexane, pyrocatechol, hydroquinone, bisphenol A and bisphenol F.
  • Suitable monoisocyanates of the general formula XI are 2-isocyanatopropyltrimethoxy and triethoxysilane.
  • An example of a suitable monoisocyanate of the general formula XII is 2-isocyanatomethyl-oxirane.
  • Suitable compounds of the general formula X for process 3 according to the invention are polyamines, in particular diamines, and amino alcohols, such as ethylenediamine, propylenediamine, diethylenetriamine, triethylenetraamine, ethanolamine and diethanolamine.
  • Suitable monoisocyanates XIII are vinyl isocyanate, allyl isocyanate, 1-isocyanato-but-3-ene and 1- (1-isocyanato-1-methylethyl) -3- (1-methylethenyl) benzene, which is sold under the trademark TMI® by the company CYTEC is available.
  • silane I is the reaction product of one equivalent of IPDI with one equivalent of bis (3-triethoxysilylpropyl) amine and one equivalent of glycidol.
  • the silanes I according to the invention are outstandingly suitable for the production of condensates according to the invention, in particular in a sol-gel process. For this purpose, they are hydrolyzed and polyco-densified in a manner known per se.
  • the condensation is preferably carried out in an aqueous phase.
  • the silane I according to the invention can be metered into the aqueous phase or the aqueous phase can be metered into a liquid organic phase which contains the silane I according to the invention or consists thereof.
  • the silane I according to the invention is preferably metered into the aqueous phase.
  • the condensation is preferably carried out in the presence of an organic or inorganic, in particular an organic, acid. Acetic acid is preferably used.
  • reaction temperatures at which the condensation is carried out can vary widely; it is preferably carried out at a temperature of from -10 to + 50, preferably 0 to + 40 and in particular + 10 to + 30 ° C. It is advisable to allow the resulting reaction mixture to react for an hour to three days.
  • silanes I according to the invention and their condensates according to the invention are outstandingly suitable as curable compositions, in particular thermally or dual-cure-curable compositions, or for their preparation.
  • Silanes I and their condensates according to the invention can vary very widely and depend on their intended use and for that
  • the content is preferably 10 to 80, preferably 15 to 75, particularly preferably 20 to 70 and in particular 25 to 65% by weight, in each case based on the composition according to the invention.
  • compositions according to the invention can contain at least one modifier.
  • suitable modifiers are additives, such as, for example . are usually used in the field of coating materials, such as binders, crosslinking agents, pigments, substances curable with actinic radiation, reactive thinners and additives (see, for example, German patent application DE 199 30 665 A1, page 4, line 17, to page 13, line 20).
  • additives such as, for example .
  • binders such as binders, crosslinking agents, pigments, substances curable with actinic radiation, reactive thinners and additives
  • reactive thinners such as Japanese patent application DE 199 30 665 A1, page 4, line 17, to page 13, line 20.
  • binders especially in the form of their aqueous dispersions.
  • Particularly suitable binders and aqueous dispersions and the processes for their preparation are known, for example, from German patent application DE 199 30 665 A1, page 3, lines 15 to 47, and page 4, line 17 to page 9, line 2.
  • the content of the binders in the compositions according to the invention can vary very widely and depends on their intended use and on the hardness and scratch resistance required for this.
  • the content is preferably 0.1 to 20, preferably 0.2 to 15, particularly preferably 0.3 to 12.5 and in particular 0.5 to 10% by weight, in each case based on the composition according to the invention.
  • the modifiers can be added before, during or after the condensation of the silanes I according to the invention. After the condensation of the silanes I according to the invention, they are preferably added to the relevant composition according to the invention.
  • Conventional and known mixing methods and devices such as stirred kettles, dissolvers, Ultraturrax, in-line dissolvers, agitator mills or extruders, can be used.
  • compositions of the invention are used to produce thermally cured or dual-cure compositions, in particular coatings, coatings, moldings, in particular optical moldings, and self-supporting films.
  • the coatings, lacquers and self-supporting foils serve in particular to protect surfaces of all types of substrates from damage by mechanical and / or chemical action, in particular to protect them from scratches and from damage by chemicals, and / or to decorate them.
  • the substrates are primarily all means of transportation, in particular muscle-powered means of transportation, such as bicycles or trolleys, aircraft, such as airplanes or zeppelins, floating bodies, such as ships or buoys, rail vehicles, and motor vehicles, such as motorcycles, buses, trucks or Cars, as well as parts thereof, structures, furniture, windows and doors, small industrial parts, coils, containers, packaging, white goods, foils, optical components, electrical components, mechanical components and hollow glass parts.
  • compositions according to the invention are particularly preferably used for the production of highly scratch-resistant, chemical-resistant clearcoats as part of automotive serial painting (OEM) with coloring and / or effect-giving multi-layer coatings.
  • OEM automotive serial painting
  • these particularly high-quality multi-layer coatings are produced by what are known as wet-on-wet processes, as are known, for example, from German patent application DE 199 30 665 A1, page 15, lines 15 to page 16, line 24.
  • the compositions according to the invention are applied with the aid of the suitable processes known and customary for the respective intended use, such as Spraying, knife coating, brushing, pouring, dipping, watering, trickling or rolling.
  • the substrate to be coated can rest as such, with the application device or system being moved.
  • the substrate to be coated in particular a coil, can also be moved, the application system being at rest relative to the substrate or being moved in a suitable manner.
  • compositions according to the invention are poured into suitable hollow molds and cured therein, after which they are separated from the hollow molds.
  • compositions of the invention can be cured after a certain period of rest. It can last from 30 seconds to 2 hours, preferably 1 minute to 1 hour and in particular 1 to 45
  • the rest period is used, for example, for the course and Degassing the paint layers or evaporating volatile constituents.
  • the rest period can be supported and / or shortened by the use of elevated temperatures up to 90 ° C and / or by a reduced air humidity ⁇ 10 g water / kg air, in particular ⁇ 5 g / kg air, provided that there is no damage or changes to the invention Crowds enter, such as early, complete networking.
  • the thermal hardening has no special features in terms of method, but is carried out according to the usual and known methods such as heating in a forced air oven or irradiation with IR lamps.
  • the thermal hardening can also be carried out in stages. Another preferred
  • the curing method is curing with near infrared (NIR radiation).
  • NIR radiation near infrared
  • a method is particularly preferably used in which the constituent water is rapidly removed from the wet layers.
  • the thermal curing is advantageously carried out at a temperature of 50 to 170, particularly preferably 60 to 165 and in particular 80 to 150 ° C. for a time of 1 minute to 2 hours, particularly preferably 2 minutes to 1 hour and in particular 3 to 30 minutes ,
  • Thermal curing can be supplemented by curing with actinic radiation.
  • the thermal curing of the compositions according to the invention takes place without the use of external catalysts quickly and easily.
  • the absence of external catalysts has the additional advantage that the resulting thermally cured compositions according to the invention do not contain any catalyst residues which lead to discoloration, odor problems and / or damage to substrates and / or individual or more layers of colored and / or multi-layer coatings could.
  • the hardened compositions according to the invention in contrast to the known hardened compositions based on condensates of epoxy-functional silanes, are not only highly scratch-resistant but also chemical-resistant, in particular resistant to acids and bases, and resistant to actinic radiation, in particular UV radiation , are.
  • the clearcoat obtained in this way had a dry layer thickness of 20 ⁇ m. It was free from stress cracks and other surface defects. It was also highly scratch-resistant, which was confirmed by the steel wool scratch test (grade 1 - 2).
  • a hammer according to DIN 1041 (weight without handle: 800 g; handle length: 35 cm) was used to carry out the steel wool scratch test.
  • the test panels were stored at room temperature for 24 hours prior to testing.
  • the flat side of the hammer was covered with a layer of steel wool and attached to the folded-up sides with tape.
  • the hammer was placed on the clear covers at a right angle.
  • the weight of the hammer was guided in a track over the surface of the clearcoat without being jammed and without additional physical strength.
  • test areas were cleaned of the steel wool residues with a soft cloth.
  • the test areas were visually evaluated under artificial light and graded as follows:
  • the BART (BASF ACID RESISTANCE TEST) was used to determine the resistance of the clear coat to acids, alkalis and water drops.
  • the clearcoat on a gradient oven was subjected to a further temperature load after baking for 30 min at 40 ° C.
  • VE fully desalinated or deionized
  • Comparative experiment V 1 The production of a coating material based on a known epoxy-functional silane and a clear coat from it
  • boehmite (Disperal® P 3 from Sasol Germany GmbH) were added to 25 parts by weight of 0.1 N acetic acid. The resulting mixture was stirred at room temperature until the boehmite was completely dissolved. The colloidal solution was then treated with ultrasound for 5 minutes.
  • the resulting coating material was knife-coated onto a glass sheet and the resulting layer was cured at 140 ° C. for 22 minutes.
  • the clearcoat obtained in this way had a dry layer thickness of 20 ⁇ m. It was free from stress cracks and other surface defects. It was also exceptionally scratch-resistant, which was confirmed by the steel wool scratch test (grade 1). However, the chemical resistance left much to be desired. So the BART gave the following results:

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)

Abstract

L'invention concerne des silanes représentés par la formule (I) [(ZmRnSi-R<1>o-)pR<2>q-Y-C(X)-Y-]rG[-Y-(X)C-Y-R<3>]s, dans laquelle m + n = 3 ; m = 1, 2 ou 3 ; n = 0, 1 ou 2 ; o = 0 ou 1, à condition que q = 1 lorsque o = 0 ; p = 1, 2, 3 ou 4 ; q = 0 ou 1, à condition que p = 1 lorsque q = 0 ; r, s = 1, 2 ou 3 ; Z représente un atome ou un groupe hydrolysable ; R représente un groupe non hydrolysable ne contenant pas de groupes époxy ; R<1> représente un groupe bivalent ; R<2> représente un groupe à valence (p + 1) ; R<3> représente un groupe non hydrolysable contenant des groupes époxy ; X représente un atome d'oxygène et/ou un atome de soufre ; G représente un groupe cyclique à valence (r + s) ; Y représente un atome d'oxygène, un atome de soufre ou un groupe imino >NR<4>, R<4> représentant un atome d'hydrogène, un groupe R, un groupe (ZmRnSi-R<1>o-)pR<2>q-, un groupe R<3>-, un groupe (ZmRnSi-R<1>o-)pR<2>q-NH-C(X)- ou un groupe R<3>-NH-C(X)-. L'invention concerne en outre des procédés de production et l'utilisation de ces composés.
EP04739101A 2003-05-08 2004-04-23 Silanes a fonction epoxy, leurs procedes de production et leur utilisation Withdrawn EP1620444A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10320431A DE10320431A1 (de) 2003-05-08 2003-05-08 Epoxyfunktionelle Silane, Verfahren zur ihrer Herstellung und ihre Verwendung
PCT/EP2004/004321 WO2004099220A1 (fr) 2003-05-08 2004-04-23 Silanes a fonction epoxy, leurs procedes de production et leur utilisation

Publications (1)

Publication Number Publication Date
EP1620444A1 true EP1620444A1 (fr) 2006-02-01

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EP04739101A Withdrawn EP1620444A1 (fr) 2003-05-08 2004-04-23 Silanes a fonction epoxy, leurs procedes de production et leur utilisation

Country Status (7)

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US (1) US7592474B2 (fr)
EP (1) EP1620444A1 (fr)
JP (1) JP4741465B2 (fr)
CA (1) CA2524627A1 (fr)
DE (1) DE10320431A1 (fr)
MX (1) MX278306B (fr)
WO (1) WO2004099220A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10320432A1 (de) * 2003-05-08 2004-12-02 Basf Coatings Ag Von externen Katalysatoren freie, autokatalysierte, thermisch härtbare Massen auf der Basis von Kondensaten epoxyfunktioneller Silane und ihre Verwendung zur Herstellung thermisch gehärteter Massen

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Publication number Priority date Publication date Assignee Title
DE2037617A1 (de) * 1970-07-29 1972-02-10 Farbenfabriken Bayer Ag, 5090 Lever Kusen Alkoxysilylsubstituierte, epoxydierte Harnstoffderivate
US3927042A (en) * 1970-07-29 1975-12-16 Bayer Ag Alkoxysilyl-substituted epoxidized urea derivatives
DE3811242A1 (de) * 1988-04-02 1989-10-19 Hoechst Ag Im waessrigem alkali loesliche, silanylgruppen in der seitenkette enthaltende bindemittel, verfahren zu deren herstellung sowie lichtempfindliches gemisch, enthaltend diese verbindungen
GB2230783B (en) * 1989-03-15 1992-11-25 Kansai Paint Co Ltd Curable composition comprising an epoxy/silanol resin system
JPH03254868A (ja) * 1990-03-01 1991-11-13 Kansai Paint Co Ltd 塗膜形成法
DE19540623A1 (de) * 1995-10-31 1997-05-07 Inst Neue Mat Gemein Gmbh Verfahren zur Herstellung von Kompositmaterialien mit hohem Grenzflächenanteil und dadurch erhältliche Kompositmaterialien
DE19726829A1 (de) 1997-06-24 1999-01-07 Inst Neue Mat Gemein Gmbh Verwendung von nanoskaligen Metalloxid-Teilchen als Polymerisationskatalysatoren
US20020169272A1 (en) * 1998-03-27 2002-11-14 Leonid Rappoport Polyfunctional urethane-or urea-containing oligomers for use in polymer preparation
DE19816136A1 (de) 1998-04-09 1999-10-14 Inst Neue Mat Gemein Gmbh Nanostrukturierte Formkörper und Schichten und deren Herstellung über stabile wasserlösliche Vorstufen
DE19857316A1 (de) 1998-12-11 2000-06-15 Inst Neue Mat Gemein Gmbh Pulverlackierte Substrate mit einem Decklack auf Basis epoxidgruppenhaltiger Silane
DE19910876C2 (de) 1999-03-11 2003-07-17 Fraunhofer Ges Forschung Verfahren zur Herstellung einer bewitterungsbeständigen Beschichtung
DE10039404A1 (de) 2000-08-06 2002-07-25 Georg Wagner Verfahren zur Herstellung von pigmentierten Zusammensetzungen nach dem Sol-Gel-Verfahren usw.

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See references of WO2004099220A1 *

Also Published As

Publication number Publication date
MXPA05011192A (es) 2005-12-14
CA2524627A1 (fr) 2004-11-18
US20060287545A1 (en) 2006-12-21
WO2004099220A1 (fr) 2004-11-18
JP4741465B2 (ja) 2011-08-03
DE10320431A1 (de) 2004-12-16
JP2006525257A (ja) 2006-11-09
MX278306B (es) 2010-08-20
US7592474B2 (en) 2009-09-22

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