EP1620513A2 - Matieres thermodurcissables autocatalysees exemptes de catalyseurs externes, a base de condensats de silanes a fonction epoxy, et leur utilisation pour produire des matieres thermodurcies - Google Patents

Matieres thermodurcissables autocatalysees exemptes de catalyseurs externes, a base de condensats de silanes a fonction epoxy, et leur utilisation pour produire des matieres thermodurcies

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Publication number
EP1620513A2
EP1620513A2 EP04729104A EP04729104A EP1620513A2 EP 1620513 A2 EP1620513 A2 EP 1620513A2 EP 04729104 A EP04729104 A EP 04729104A EP 04729104 A EP04729104 A EP 04729104A EP 1620513 A2 EP1620513 A2 EP 1620513A2
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EP
European Patent Office
Prior art keywords
group
groups
hydrolyzable
curable compositions
compositions according
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.)
Withdrawn
Application number
EP04729104A
Other languages
German (de)
English (en)
Inventor
Elke Westhoff
Manuela Niemeier
Wilfried STÜBBE
Andreas Poppe
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
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BASF Coatings GmbH
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Filing date
Publication date
Application filed by BASF Coatings GmbH filed Critical BASF Coatings GmbH
Publication of EP1620513A2 publication Critical patent/EP1620513A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/80—Masked polyisocyanates
    • C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
    • C08G18/807—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with nitrogen containing compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31511—Of epoxy ether
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Definitions

  • the present invention relates to new, autocatalyzed, thermosetting compositions free from external catalysts based on condensates epoxyfunctional Siiane.
  • the present invention relates to the use of the new, autocatalyzed, thermally curable compositions free from external catalysts, based on condensates epoxyfunctional Siiane, for the production of thermally hardened compositions, in particular coatings and paints, as well as moldings, in particular optical moldings, and self-supporting foils.
  • Thermally curable compositions based on condensates epoxyfunctional Siiane, which do not contain urethane groups are from the 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, Can carry cyano, hydroxy, alkoxy, alkoxycarbonyl, 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.
  • the object of the present invention was to provide new thermally curable compositions based on condensates epoxyfunctional Siiane, which no longer have the disadvantages of the prior art, but which can also be cured rapidly at relatively low temperatures even without external catalysts or starters.
  • these new thermally curable compositions should be able to be easily modified in such a way that they deliver thermally hardened compositions, in particular coatings and paints, as well as moldings, in particular optical moldings, and self-supporting foils, which are chemical-resistant, highly scratch-resistant, high-gloss, flexible, transparent and clear , the thermally hardened masses, in particular the coatings and the paints, in Dry layer thicknesses> 30 ⁇ m no longer show stress cracks and no delamination from the substrates and can therefore be used more widely than the previously known thermally curable compositions based on condensates epoxyfunctional Siiane.
  • the new thermally hardened masses produced from the new thermally curable masses should have a high scratch resistance in conjunction with a high
  • the new, autocatalyzed, thermally curable compositions free from external catalysts which contain at least one condensate of at least one epoxy-functional silane, selected from the group of Siiane, which have at least one hydrolyzable atom and / or a hydrolyzable group and
  • Epoxy group and at least one non-hydrolyzable, epoxy group-free group with at least one group selected from the group consisting of (a) double-bonded, copper-bonding urethane groups -NH-C (X) -X- and -X- (X) C-NH-,
  • variable X represents an oxygen or sulfur atom and the variable Y represents the remainder of a blocking agent for isocyanate groups;
  • compositions according to the invention the new, auto-catalyzed, thermally curable compositions free from external catalysts based on condensates epoxyfunctional Siiane are referred to as "compositions according to the invention”.
  • compositions according to the invention the new process for the production of thermally hardened masses from thermally hardenable masses based on condensates epoxyfunctional Siiane was found, in which at least one mass according to the invention is thermally hardened in the absence of external catalysts and which is referred to below as the “method according to the invention”.
  • compositions according to the invention could be cured rapidly at comparatively low temperatures even without external catalysts or starters.
  • the compositions according to the invention had a considerably longer pot life or processing time than the known thermally curable compositions, which considerably simplified their use in operational practice.
  • compositions according to the invention could be modified without problems in such a way that they provided thermally cured compositions, in particular coatings and coatings, and also moldings, in particular optical moldings, and self-supporting films, which were chemical-resistant, highly scratch-resistant, high-gloss, flexible, transparent and clear, the thermally hardened compositions, in particular the coatings and the coatings, in dry layer thicknesses> 30 ⁇ m no longer showed any stress cracks and no delamination from the substrates and were therefore more widely applicable than the previously known thermally curable compositions based on condensates epoxy function studio Siiane.
  • the compositions according to the invention are outstandingly suitable for the production of clearcoats for the automotive OEM coating.
  • autocatalyzed means that the thermal curing of the compositions according to the invention is catalyzed by starting products and / or intermediates which are formed in the thermal curing (cf. Römpp Online, Georg Thieme Verlag, Stuttgart, 2002, “Autocatalysis ").
  • external catalysts or starters are understood to mean substances which usually catalyze the thermal curing of thermally curable compositions via epoxy groups. According to experts, such catalysts are fundamentally necessary to achieve practical results (cf. Johan Bieleman, "Lackadditive”, Wiley-VCH, Weinheim, New York, 1998, “7.2.4 Epoxy Resin Systems", pages 263 to 269). Further examples of catalysts of this type, which are also used in thermally curable compositions based on condensates epoxyfunctional Siiane, are for example from the international patent application WO 99/52964 A, page 8, line 29, to page 9, line 20, or German patent application DE 197 26 829 A 1, column 3, line 65, to column 4, line 64, known. In the context of the present invention, “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.
  • Isocyanate adduct group-free group means that the group in question is free from adduct groups which result from reactions of isocyanate groups with isocyanate-reactive functional groups or compounds, such as urethane groups, urea groups or blocked isocyanate groups.
  • compositions according to the invention contain at least one condensate of at least one epoxy-functional silane.
  • condensates are formed by the hydrolysis and condensation of silanes containing hydrolyzable groups according to the so-called sol-gel process (cf. Römpp Online, Georg Thieme Verlag, Stuttgart, 2002, “Sol-gel process”).
  • the silane contains at least one hydrolyzable atom and / or at least one hydrolyzable group. It preferably contains at least two, in particular at least three, hydrolyzable atoms and / or at least two, in particular at least three, hydrolyzable groups.
  • the silane also contains mandatory at least one, in particular one, non-hydrolyzable, isocyanate adduct group-free group with at least one epoxy group and
  • variable X stands for an oxygen or sulfur atom, in particular an oxygen atom
  • variable Y stands for the rest of a blocking agent for isocyanate groups
  • the silane also contains mandatory
  • the silane also contains mandatory at least one, in particular one, non-hydrolyzable, isocyanate adduct group-free group with at least one epoxy group,
  • At least one, in particular one, non-hydrolyzable, epoxy group-free group with at least one, in particular one, group selected from the group consisting of groups (a), (b) and (c), and
  • hydrolyzable groups, non-hydrolyzable, isocyanate adduct group-free groups with at least one epoxy group, non-hydrolyzable, epoxy group-free group with at least one group (a), (b) and / or (c) and non-hydrolyzable groups with at least one epoxy group and at least one Group (a), (b) and / or (c) are all atoms and groups which are customary and known in the field of silane chemistry and are described, for example, in patent applications EP 1 179 575 A 2, WO 00/35599 A, WO 99/52964, WO 99/54412 A, DE 197 26 829 A.
  • siiane of embodiment (ii) according to the invention are preferably used.
  • silane from the group consisting of silanes of the general formulas la is preferred:
  • R non-hydrolyzable, single-bonded organic group containing at least one epoxy group
  • R 1 non-hydrolyzable, single-bonded organic group, containing no epoxy group
  • variable X stands for an oxygen or sulfur atom, in particular an oxygen atom
  • variable Y stands for the rest of a blocking agent for isocyanate groups
  • blocking agents are the blocking agents known from US Pat. No. 4,444,954 A1:
  • phenols such as phenol, cresol, xylenol, nitrophenol, chlorophenol, ethylphenol, t-butylphenol, hydroxybenzoic acid, esters of this acid or 2,5-di-tert-butyl-4-hydroxytoluene;
  • lactams such as ⁇ -caprolactam, ⁇ -valerolactam, ⁇ -butyrolactam or ß-propiolactam
  • active methylenic compounds such as diethyl malonate, dimethyl malonate, ethyl or methyl acetoacetate or acetylacetone;
  • alcohols such as methanol, ethanol, n-propanol, isopropanol, n-
  • butanol Isobutanol, t-butanol, n-amyl alcohol, t-amyl alcohol,
  • Diacetone alcohol ethylene chlorohydrin, ethylene bromohydrin, 1,3-dichloro-2-propanol, 1,4-cyclohexyldimethanol or acetocyanhydrin;
  • mercaptans such as butyl mercaptan, hexyl mercaptan, t-butyl mercaptan, t-dodecyl mercaptan, 2-mercaptobenzothiazole, thiophenol, methylthiophenol or ethylthiophenol
  • acid amides such as acetoanilide, acetoanisidinamide, acrylamide, methacrylamide, acetic acid amide, stearic acid amide or benzamide
  • imides such as succinimide, phthalimide or maleimide
  • amines such as diphenylamine, phenylnaphthylamine, xylidine, N-phenylxylidine, carbazole, aniline, naphthylamine, butylamine, dibutylamine or butylphenylamine;
  • imidazoles such as imidazole or 2-ethylimidazole
  • ureas such as urea, thiourea, ethylene urea, ethylene thiourea or 1,3-diphenylurea
  • imines such as ethyleneimine
  • oximes such as acetone oxime, formal doxime, acetaldoxime, acetoxime, methyl ethyl ketoxime, diisobutyl ketoxime, diacetyl monoxime,
  • Sulfuric acid salts such as sodium bisulfite or potassium bisulfite
  • hydroxamic acid esters such as benzyl methacrylohydroxamate or allyl methacrylohydroxamate; or
  • variable Z stands for a hydrolyzable, non-isocyanate-reactive atom and / or a hydrolyzable, monovalent, non-isocyanate-reactive group.
  • the hydrolyzable atom Z is preferably selected from the group consisting of fluorine atoms, chlorine atoms and bromine atoms.
  • the hydrolyzable, monovalent group Z is preferably selected from the group consisting of monovalent organic groups.
  • the monovalent organic groups Z preferably consist of at least one, in particular one, monovalent organic radical which is selected from the group consisting of branched and unbranched, cyclic and non-cyclic alkyl, alkenyl and alkynyl and aryl groups and one Oxygen atom or sulfur atom or a carbonyl group or carboxyl group, in particular an oxygen atom, which links the monovalent organic radical to the silicon atom.
  • Alkoxy groups having 1 to 4 carbon atoms in the alkyl radical, in particular methoxy, ethoxy, propoxy and butoxy groups, are particularly preferably used as hydrolyzable, monovalent, organic groups Z.
  • the variable R stands for a non-hydrolyzable, single-bonded organic group containing at least one, in particular a final, epoxy group.
  • the non-hydrolyzable, monovalent organic group R containing at least one epoxy group, is preferably selected from the group consisting of branched and unbranched alkyl, alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkynyl or alkynylaryl groups, where the alkyl, alkenyl and alkynyl groups can also be cyclic. Alkyl groups and alkylcycloalkyl groups are particularly preferably used.
  • variable R 2 stands for a non-hydrolyzable, multi-bonded, in particular double-bonded, organic group containing at least one, in particular a final, epoxy group.
  • the non-hydrolyzable, monovalent organic group R, containing at least one epoxy group is preferably selected from the group consisting of branched and unbranched alkyl, alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkynyl or alkynylaryl groups, where the alkyl, alkenyl and alkynyl groups can also be cyclic. Alkyl groups and alkylcycloalkyl groups are particularly preferably used. Regarding the nomenclature, reference is made to the explanations regarding group R.
  • the variable R 1 denotes a non-hydrolyzable, single-bonded organic group which contains no epoxy groups.
  • the groups R 1 are preferably selected from the group consisting of branched and unbranched alkyl, alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkynyl or alkynylaryl groups, the alkyl, alkenyl - And alkynyl groups can also be selected cyclically.
  • group R refers to the explanations regarding group R.
  • At least one group R and / or R 1 , in particular at least one group R, of the general formula Ia and at least one group R 1 and / or R 2 , in particular at least one group R 2 , of the general formula Ib contains or contain at least one, in particular one of the groups (a), (b) and / or (c) described above.
  • the non-hydrolyzable organic groups R, R 1 and R 2 can still be substituted. It is important here that the substituents are inert in the sense that they do not interfere with the production of Siiane la and Ib, the sol-gel process or the crosslinking via the epoxy groups, in particular that they do not inhibit these reactions or start them prematurely or lead to unwanted by-products.
  • suitable substituents are halogen atoms, in particular fluorine atoms, nitrile groups, alkoxy groups or alkoxycarbonyl groups.
  • the groups R, R 1 and R 2 are preferably unsubstituted.
  • the non-hydrolyzable organic groups R, R 1 and R 2 can also contain divalent functional groups different from the groups (a), (b) and / or (c) described above. Here too is it is essential that these functional groups are inert in the sense that they are neither the sol-gel process nor cross-linking via the
  • Epoxy groups interfere, especially that they do not inhibit these reactions or start them prematurely or lead to undesirable by-products.
  • suitable functional groups are
  • the Siiane of the general formula la or Ib can be prepared by a wide variety of organic and chemical processes. It is essential that manufacturing processes are used, by means of the groups (a), (b) and / or (c) described above into groups R and / or R 1 of the formula or into groups R 1 and / or R 2 of Formula Ib will be introduced.
  • This is preferably produced by reacting suitable starting products (A) which contain at least one, in particular one, free isocyanate group and suitable starting products (B) which contain at least one, in particular one, isocyanate-reactive functional group, in particular a hydroxyl group ,
  • the starting products (B) particularly preferably also comprise at least one epoxy group.
  • the epoxy groups are mandatory in the starting products (B) if they are not already in the starting products (A).
  • Siiane of the general formulas la and Ib are particularly preferred by the reaction of (A) silanes of the general formula II containing isocyanate groups:
  • the variable Z has the meaning given above and the variable R 3 for a non-hydrolyzable organic group containing at least one, preferably one, in particular one, free, isocyanate group, selected from the group consisting of branched and unbranched alkyl, alkenyl -, Alkynyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkynyl or alkynylaryl groups, where the alkyl, alkenyl and alkynyl groups can also be cyclic, but especially alkyl groups; and
  • the index q 1 or 2, in particular 1, and the variable R 4 for one, preferably at least one, preferably one, in particular a final epoxy group-containing organic group selected from the group consisting of branched and unbranched alkyl, Alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkynyl or alkynylaryl groups, where the alkyl, alkenyl and alkynyl groups can also be cyclic, but especially alkyl groups.
  • the groups R 3 and R 4 can contain the substituents and / or functional groups described above for the non-hydrolyzable organic groups R, R 1 and R 2 . With regard to the nomenclature of groups R 3 and R 4 , reference is made to the explanations relating to group R.
  • Examples of highly suitable starting products (A) are 3-isocyanatopropyltriethoxysilane and the reaction product of isophorone diisocyanate with bis (3-triethoxysilylpropyl) amine (Dynasilan® 1122 from Degussa) in a molar ratio of 1: 1.
  • An example of a suitable starting material (B) is glycidol.
  • reaction product of glycidol with 3-isocyanatopropyltriethoxysilane and the reaction product of glycidol with the reaction product of isophorone diisocyanate with bis (3-triethoxysilylpropyl) amine are particularly preferably used as Siiane in a molar ratio of 1: 1.
  • At least one, in particular one, of the Siiane la or Ib described above is hydrolyzed and condensed in a customary and known manner.
  • the condensation is preferably carried out in an aqueous phase.
  • the silane la or Ib can be metered into the aqueous phase or the aqueous phase can be metered into a liquid organic phase which contains the silane la or Ib or consists thereof.
  • the silane la or Ib 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, in particular between 8 and 16 hours.
  • the content of the mass according to the invention in the silane la or Ib or its condensate can vary very widely and depends on its intended use and the viscosity which is advantageous for the application.
  • 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 modifying agents are additives such as are usually used in the field of coating materials, such as binders, crosslinking agents, pigments, radiation-curable substances, reactive diluents and additives (cf., for example, German patent application DE 199 30 665 A1, page 4, line 17 , to page 13, line 20).
  • binders such as binders, crosslinking agents, pigments, radiation-curable substances, reactive diluents and additives
  • reactive diluents and additives cf., for example, German 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 silane. They are preferably added to the relevant mass according to the invention after the condensation of the silane. 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 compositions, in particular coatings, paints, moldings, in particular optical moldings, and self-supporting films.
  • the coatings, paints and self-supporting foils serve in particular to protect surfaces of all types of substrates from damage by mechanical action, in particular to protect them from scratches, 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, or 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 bodies.
  • Further examples of uses and substrates are from the German patent application DE 198 16 136 A1, column 7, line 54, to column 8, line 58.
  • compositions according to the invention are particularly preferably used for the production of highly scratch-resistant clearcoats in the context of automotive OEM (OEM) painting with multi-layer paint and / or effect paint.
  • OEM automotive OEM
  • 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.
  • the usual and known methods such as casting or film blowing are used for the production of the films according to the invention.
  • the compositions of the invention can be cured after a certain period of rest. It can have a duration of 30 seconds to 2 hours, preferably 1 minute to 1 hour and in particular 1 to 45 minutes.
  • the rest period is used, for example, for the course and degassing of the paint layers or for the evaporation of volatile components.
  • 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 curing method is near infrared curing (NIR radiation).
  • NIR radiation near infrared curing
  • a method is particularly preferably used in which the constituent water is rapidly removed from the wet layers. Suitable processes of this type are described, for example, by Roger Talbert in Industrial Paint & Powder, 04/01, pages 30 to 33, “Curing in Seconds with NIR", or in Galvanotechnik, Volume 90 (11), pages 3098 to 3100, “Lackiertechnik, NIR drying every second of liquid and powder coatings «.
  • 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 ,
  • the thermal curing of the compositions according to the invention takes place quickly and easily without the use of external catalysts.
  • 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.
  • Feed 1 consisted of 46 parts by weight of potassium peroxodisulfate dissolved in 900 parts by weight of deionized water.
  • Feed 2 consisted of 163.6 parts by weight of tertiary-butyl methacrylate, 16.1 parts by weight of methyl methacrylate, 270.7 parts by weight of hydroxypropyl methacrylate and 36.5 parts by weight of diphenylethylene.
  • the feed rates were chosen such that feed 2 was completely metered in after 3 hours, while feed 1 was only metered in completely after 3.5 hours. After the feeds had ended, the reaction mixture was post-polymerized at 90 ° C. for 30 minutes. The resulting dispersion had a solids content of 26.1% by weight.
  • example 1 The production of a coating material based on the silane of the general formula la and a clearcoat therefrom
  • the clearcoat obtained in this way had a dry layer thickness of 15 ⁇ 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 - 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 coats 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. In each test, 10 double strokes were carried out by hand.
  • the steel wool was replaced after each of these individual tests.
  • 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 clearcoat had a dry film thickness of 20 ⁇ m. It was free from tension cracks and other surface defects. The scratch resistance was very good, which could be demonstrated by the Steinwölle scratch test; the grade was 2.
  • 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
  • the clearcoat therefore had very good acid resistance.
  • the chemical resistance of the clear coat was determined using the gradient oven test.
  • the coating material was applied to a basecoat on a test panel and cured at 140 ° C. for 22 minutes.
  • the resulting clearcoat was exposed to test substances and the temperatures at which the test substances began to damage the clearcoat were determined. The following results resulted:
  • the resulting coating materials were knife-coated on glass plates and the resulting layers were cured at 140 ° C. for 22 minutes.
  • the resulting clearcoats had a dry film thickness of 15 ⁇ m. However, their surfaces were soft and showed properties of an uncrosslinked or only slightly crosslinked film. Larger defects in the clearcoats could be created by just gently pressing with a fingernail. The scratch resistance of the clearcoats was poor (grade 6 in the steel wool scratch test). Comparative experiment V 4
  • the resulting clearcoat had a dry film thickness of 15 ⁇ m. However, their surface was soft and showed properties of a non-cross-linked or only slightly cross-linked film. Larger defects in the clearcoat could be created by simply pressing with a fingernail. The scratch resistance of the clearcoat was poor (grade 6 in the steel wool scratch test).
  • the coating material was knife-coated onto a glass sheet.
  • the resulting layer was cured at 140 ° C for 22 minutes.
  • the resulting clear coat was high gloss (> 80 units at 20 °), clear and transparent. Their dry layer thickness was 40 ⁇ m. It was free from stress cracks and surface defects. The scratch resistance was excellent (grade 1 - 2 in the steel wool scratch test).
  • Example 3 was repeated, except that instead of the coating material of example 1
  • the resulting coating materials were knife-coated on glass plates and the resulting layers were cured at 140 ° C. for 22 minutes.
  • the resulting clear coats had a dry film thickness of 40 ⁇ m. Their surfaces were soft and showed properties of a non-cross-linked or only slightly cross-linked film. Larger defects in the clearcoats could be created by just gently pressing with a fingernail. The scratch resistance of the clearcoats was poor (grade 6 in the steel wool scratch test).
  • 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.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Epoxy Resins (AREA)
  • Silicon Polymers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

L'invention concerne des matières thermodurcissables autocatalysées exemptes de catalyseurs externes, contenant des condensats de silanes qui contiennent des atomes hydrolysables et/ou des groupes hydrolysables, ainsi que (i) des groupes non hydrolysables exempts de groupes adduits isocyanate et présentant des groupes époxy, et des groupes non hydrolysables exempts de groupes époxy et présentant (a) des groupes uréthanne bivalents se combinant -NH-C(X)-X- et/ou -X-(X)C-NH-, (b) des groupes urée bivalents se combinant -HN-C(X)-NH- et/ou (c) des groupes terminaux monovalents Y-C(X)-NH-, dans lesquels la variable X représente un atome d'oxygène ou de soufre et la variable Y représente le reste d'un agent masquant pour des groupes isocyanate, ou ainsi que (ii) des groupes non hydrolysables présentant des groupes époxy et des groupes (a), (b) et/ou (c), ou ainsi que (iii) des groupes non hydrolysables exempts de groupes adduits isocyanate et présentant des groupes époxy, des groupes non hydrolysables exempts de groupes époxy et présentant des groupes (a), (b) et/ou (c), et des groupes non hydrolysables présentant des groupes époxy et des groupes (a), (b) et/ou (c). L'invention concerne également des procédés pour leur production et leur utilisation pour produire des matières thermodurcies.
EP04729104A 2003-05-08 2004-04-23 Matieres thermodurcissables autocatalysees exemptes de catalyseurs externes, a base de condensats de silanes a fonction epoxy, et leur utilisation pour produire des matieres thermodurcies Withdrawn EP1620513A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003120432 DE10320432A1 (de) 2003-05-08 2003-05-08 Von externen Katalysatoren freie, autokatalysierte, thermisch härtbare Massen auf der Basis von Kondensaten epoxyfunktioneller Silane und ihre Verwendung zur Herstellung thermisch gehärteter Massen
PCT/EP2004/004318 WO2004099322A2 (fr) 2003-05-08 2004-04-23 Matieres thermodurcissables autocatalysees exemptes de catalyseurs externes, a base de condensats de silanes a fonction epoxy, et leur utilisation pour produire des matieres thermodurcies

Publications (1)

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EP1620513A2 true EP1620513A2 (fr) 2006-02-01

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EP04729104A Withdrawn EP1620513A2 (fr) 2003-05-08 2004-04-23 Matieres thermodurcissables autocatalysees exemptes de catalyseurs externes, a base de condensats de silanes a fonction epoxy, et leur utilisation pour produire des matieres thermodurcies

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US (1) US7501480B2 (fr)
EP (1) EP1620513A2 (fr)
JP (1) JP4714141B2 (fr)
DE (1) DE10320432A1 (fr)
WO (1) WO2004099322A2 (fr)

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WO2008150568A2 (fr) * 2007-03-30 2008-12-11 Ndsu Research Foundation Revêtements hybrides préparés à partir de résines de carbamate de glycidyle
JP2011141126A (ja) * 2010-01-05 2011-07-21 Toshiba Corp プローブカード
JP6153631B2 (ja) * 2013-02-25 2017-06-28 コリア インスティチュート オブ インダストリアル テクノロジー アルコキシシリル基を有するエポキシ化合物、その製造方法、それを含む組成物と硬化物及びその用途
EP3049455B1 (fr) 2013-09-25 2020-11-25 Basf Se Nouveaux agents de réticulation pour matières de revêtement

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WO2004099322A2 (fr) 2004-11-18
JP2006525388A (ja) 2006-11-09
DE10320432A1 (de) 2004-12-02
US20070166550A1 (en) 2007-07-19
WO2004099322A3 (fr) 2005-02-10
US7501480B2 (en) 2009-03-10
JP4714141B2 (ja) 2011-06-29

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