EP1029021A1 - Oligomeres cholesteriques a groupes terminaux reticulables - Google Patents

Oligomeres cholesteriques a groupes terminaux reticulables

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Publication number
EP1029021A1
EP1029021A1 EP98961151A EP98961151A EP1029021A1 EP 1029021 A1 EP1029021 A1 EP 1029021A1 EP 98961151 A EP98961151 A EP 98961151A EP 98961151 A EP98961151 A EP 98961151A EP 1029021 A1 EP1029021 A1 EP 1029021A1
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EP
European Patent Office
Prior art keywords
groups
cholesteric
formula
stands
oligomers 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.)
Ceased
Application number
EP98961151A
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German (de)
English (en)
Inventor
Peter Schuhmacher
Hans R. Kricheldorf
Thorsten Krawinkel
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BASF SE
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BASF SE
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Classifications

    • 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
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/16—Aliphatic-aromatic or araliphatic polycarbonates
    • 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
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • 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
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/40—Polyesters derived from ester-forming derivatives of polycarboxylic acids or of polyhydroxy compounds, other than from esters thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0098—Organic pigments exhibiting interference colours, e.g. nacrous pigments
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/36—Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials

Definitions

  • the invention relates to cholesteric oligomers with crosslinkable end groups, processes for their preparation and their use.
  • liquid-crystalline phases When heating anisotropic substances, liquid-crystalline phases, so-called mesophases, can occur.
  • the individual phases differ by the spatial arrangement of the molecular centers on the one hand and by the molecular arrangement with regard to the longitudinal axes on the other hand (G. Gray, P A. insor, Liquid Crystals and Plastic Crystals, Ellis Horwood Limited, Chichester 1974).
  • the nematic liquid-crystalline phase is characterized by the parallel orientation of the longitudinal axes of the molecules (one-dimensional order).
  • a so-called chiral nematic (cholesteric) phase is created in which the longitudinal axes of the molecules form a helical superstructure that is perpendicular to it (H.
  • the chiral nematic phase has special optical properties: high optical rotation and a pronounced circular dichroism, which is created by selective reflection of circularly polarized light within the chiral nematic layer.
  • the pitch corresponds to the helical superstructure of the wavelength of visible light, a so-called grandjean texture is formed.
  • the colors, which appear different depending on the viewing angle, depend on the pitch of the helical superstructure, which in turn depends on the twisting power of the chiral component.
  • the pitch and thus the wavelength range of the selectively reflected light of a chiral nematic layer can be varied by changing the concentration of a chiral dopant.
  • Such chiral nematic systems offer interesting possibilities for practical use.
  • chiral parts of the molecule into mesogenic acrylic acid esters and orientation in the chiral nematic phase, e.g. B. after photocrosslinking, a stable, colored network can be produced, the concentration of chiral component of which is then no longer changed can (G. Galli, M. Laus, A. Angelon, Makromol. Chemie 187, 2289 (1986)).
  • a colored polymer By admixing non-crosslinkable chiral compounds to nematic acrylic acid esters, a colored polymer can be produced by photocrosslinking which still contains high proportions of soluble components (I. Heyndricks, DJ Broer, Mol. Cryst. Liq. Cryst. 203, 113 (1991)).
  • a statistical chiral nematic network can be obtained by statistical hydrosilylation of mixtures of cholesterol derivatives and acrylate-containing mesogens with defined cyclic siloxanes and subsequent photopolymerization, in which the chiral component can have a share of up to 50% of the material used; however, these polymers still contain significant amounts of soluble fractions (Kreuzer University of Applied Sciences, R. Mauerer, Ch. Müller-Rees, J. Stohrer, Lecture No. 7, 22nd Working Conference on Liquid Crystals, Freiburg, 1993).
  • DE-A-35 35 547 describes a process in which a mixture of cholesterol-containing monoacrylates can be processed to chiral nematic layers by means of photocrosslinking.
  • the total proportion of the chiral component in the mixture is approximately 94%.
  • a pure side chain polymer such a material is not mechanically very stable, but an increase in stability can be achieved by highly crosslinking diluents.
  • polyesters generally show narrow areas of existence of the chiral nematic phase and contain predominantly open-chain chiral components which have a low twistability, so that relatively large proportions of these components are necessary in order to achieve a color impression. This makes the selection of the remaining polyester components such. B. limited in terms of their mechanical properties.
  • DE-A-19 538 700 describes cholesteric phase-forming polymers which have at least one bifunctional chiral molecular building block, at least one bifunctional achiral or racemic molecular building block and at least one bifunctional molecular building block which can be any chiral or achiral, and which of the first two Molecular building blocks is different.
  • the polymers described are as molding compound granules for further processing, for. B. in injection molding, suitable. They can also be processed into pigments for iridescent paints.
  • EP-A-682 092 describes paints based on chiral nematic polymers containing cinnamic acid groups, which can be crosslinked by UV radiation, but not thermally. Examples are polyesters which have been prepared by polycondensation of dicarboxylic acids and diols.
  • DE-A-44 41 651 discloses a process for the surface coating of substrates with a coating composition which contains at least one polymerizable, low-molecular liquid crystalline compound.
  • a coating composition which contains at least one polymerizable, low-molecular liquid crystalline compound.
  • photochemically polymerizable, low molecular weight liquid-crystalline compounds (oligoesters) in printing inks, inks and coating systems is also described.
  • WO-A-96/02 597 describes a method for coating or printing substrates with a coating or printing agent which contains a chiral or achiral liquid-crystalline monomer and a non-liquid-crystalline chiral compound.
  • the liquid-crystalline monomers are preferably photochemically polymerizable bisacrylates.
  • WO-A-95/29 962 describes aqueous coating compositions for the production of coatings, the color impression of which depends on the viewing angle and the platelet-shaped pigments made from oriented, three-dimensionally crosslinked substances of liquid-crystalline structure. contain chiral phase. Three-dimensionally crosslinkable polyorganosiloxanes are described as particularly preferred substances.
  • WO-A-95/29 961 discloses coating compositions with a color impression depending on the viewing angle and their use in basecoats for multi-layer coatings.
  • the compositions contain platelet-shaped pigments with a color which is dependent on the viewing angle and which consist of oriented, three-dimensionally crosslinked substances of liquid-crystalline structure with a chiral phase. Three-dimensionally crosslinkable polyorganosiloxanes are described as preferred substances.
  • the interference pigments consist of esterified cellulose ethers, in particular of acylated hydroxypropyl cellulose.
  • EP-A-724 005 discloses a pigment with a color that is dependent on the viewing angle, its production and use in a lacquer.
  • the pigment is obtained by three-dimensional crosslinking of oriented substances of liquid-crystalline structure with a chiral phase.
  • Preferred substances are three-dimensionally crosslinkable polyorganosiloxanes.
  • it is proposed to carry out the crosslinking in the presence of at least one further, color-neutral compound which contains at least two crosslinkable double bonds.
  • Acrylates, polyurethanes, epoxies, siloxanes, polyesters and alkyd resins are mentioned as preferred color-neutral compounds.
  • EP-A-686 674 and the priority application on which it is based DE-A-44 16 191 describe interference pigments from molecules fixed in a cholesteric arrangement and their use.
  • the pigments described have a platelet-shaped structure and a thickness of 7 ⁇ m. They contain oriented cross-linked substances of liquid-crystalline structure with a chiral phase, preferably polyorganosiloxanes.
  • EP-A-601 483 and the priority application on which it is based DE-A-42 40 743 describe pigments with coloration which is dependent on the viewing angle, their production and use.
  • the pigments described consist of oriented three-dimensionally crosslinked substances of liquid-crystalline structure with a chiral phase, preferably polyorganosiloxanes, and optionally further dyes and pigments.
  • DE-A-19 502 413 describes a pigment with a color which is dependent on the viewing angle and which has been obtained by three-dimensional crosslinking of oriented substances of liquid-crystalline structure with a chiral phase. In order to make such a pigment contain color compared to elevated temperatures, it is proposed that the crosslinking be carried out in the presence of at least one further color-neutral compound containing at least two crosslinkable double bonds.
  • DE-A-19 704 506 describes liquid-crystalline chiral nematic polyesters with flexible chains which comprise isosorbide, isomannide and / or isoidide units.
  • the polyesters are not crystalline and form Grandjean textures that can be frozen below the glass transition temperature when they cool. They are therefore particularly useful as surface coating materials.
  • phenylacetylenyl-terminated oligo- / polyimides which are not cholesteric and can be crosslinked at high temperatures without the release of volatile substances.
  • the crosslinked polymers described are said to be more stable to thermal oxidation than those made from acetylene-terminated oligomers.
  • US-A-4, 166, 168 describes non-cholesteric acetylene-terminated polyimide esters and their thermal crosslinking for the production of insoluble non-meltable polymers without the formation of by-products.
  • Non-cholesteric liquid-crystalline polymers are known from Hoyt, AE and Benicewicz, BC, Journal of Polymer Science: Part A: Polymer Chemistry, 28, 3403-3415 and 3417-3427 (1990), which are obtained by polymerizing with maleimide, norbornene dicarboxylic acids. rhimidic and methylnorbornenedicarboxylic acid: lmid groups terminated Monomers are available. The maleimide-terminated monomers crosslink faster than the methylnorbornene dicarboximide-terminated monomers.
  • IP960 prepolymers are also norbornenedicarboximide-terminated, differ from the PMR-15 prepolymers in that a carbonyl function is replaced by a C-OH group. In contrast to PMR-15, IP960 should be storable in dry powder form.
  • WO-A-97/00600 describes polymerizable liquid-crystalline compounds which contain a mesogenic group and are terminated with polymerizable residues.
  • cholesteric polymerization products can be produced, which can be comminuted, for example, into pigments.
  • the described compounds and compositions containing them are said to be distinguished by favorable liquid-crystalline phase temperature ranges and to be usable in optical display devices and in cholesteric liquid-crystalline colorants.
  • DE-A-19 631 658 describes chiral nematic polycarbonates which are produced by various types of polycondensation of diols with phosgene or diphosgene. Photoreactive and / or thermally crosslinking groups can be condensed in the form of the corresponding diol compounds. Cinnamic acid chloride can be added as a chain terminator.
  • DE-A-19 504 913 describes chiral nematic polyesters with chiral diol components with a strong twisting action, in particular dianhydro sugars, and broad liquid-crystalline phase regions.
  • the polymers can contain cinnamic acid groups which can be crosslinked via a [2 + 2] photocycloaddition.
  • nematic or cholesteric oligo- / polyesters, oligo- / polycarbonates or nematic or cholesteric mixtures containing them are known.
  • the compounds described can be thermally crosslinked at a temperature of about 180 to 340 ° C. They are particularly useful as surface coating materials.
  • the invention is therefore based on the object of providing further cholesteric oligomers which can be crosslinked in the anisotropic phase, in particular thermally, without eliminating the cholesteric effect.
  • the present invention relates to cholesteric oligomers of the formula I.
  • n stands on average for a value from 0 to 1
  • p stands on average for a value from 1 to 20,
  • A represents a chiral group
  • Y 1 , Y 2 and Y 3 independently of one another represent a group of the formula -CO-O-, -O-CO- or -O-CO-O-,
  • Z 1 and Z 2 independently of one another represent a group of the formula WQ-,
  • Q represents a chemical bond or a mono- or polysubstituted alkylene or arylene spacer
  • W represents a crosslinkable heterocyclic group.
  • the oligomers can be crosslinked to polymer networks in the anisotropic phase without destroying the supermolecular order, so that the cholesteric effect is permanently fixed.
  • the polymeric networks are resistant to the effects of temperature and weather.
  • Preferred cholesteric oligomers are those in which W is selected from residues of the formula
  • E represents a crosslinkable alkenylene group
  • the radicals R can be the same or different and are hydrogen or C ⁇ -C 4 alkyl, such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl or tert-butyl.
  • E preferably stands for
  • the groups A are preferably selected from chiral groups which differ from aliphatic ethers or thioethers; araliphatic ethers or thioethers; .Amino acids, especially L-proline; Prolinol; Camphoric acid or lithocholic acid; Resin acids, in particular .Abietic and dehydroabietic acid; Sugars, especially pentoses and hexoses; Derive binaphthyl or biphenyl derivatives or from optically active glycols or diols;
  • the groups B are preferably selected from optionally by fluorine, chlorine, bromine, cyano, -CC alkyl, -C-alkoxy, hydroxy or nitro substituted, linear aliphatic, isocycloaliphatic, heterocycloaliphatic, isoaromatic or heteroaromatic groups or among compounds , the 2 to 4 such groups, linked by chemical bonds or via bridge members, such as oxygen, sulfur, -CO-O-, -O-CO-O-, -CO-N (R) - or -N (R) - CO- included.
  • Q preferably represents a chemical bond or an arylene radical optionally substituted with one or more groups selected from C 1 -C alkoxy, fluorine, chlorine, bromine, cyano, hydroxyl or nitro, in particular a phenylene or naphthylene radical.
  • Groups A are particularly preferably selected independently of one another from groups of the formula
  • R is C 1 -C 4 -alkyl or hydrogen
  • X represents S, 0, N, CH 2 or a single bond.
  • the groups B are particularly preferably selected independently of one another from groups of the formula
  • each of the phenyl groups or the naphthyl group may have 1, 2 or 3 substituents which are selected independently of one another from straight-chain or branched C ⁇ -C-alkyl, C ⁇ -C 4 alkoxy, fluorine, chlorine, bromine, cyano, hydroxy or nitro , where in the formulas above
  • W ' represents NR, S, O, (CH 2 ) g O (CH 2 ) h , (CH 2 ) m or 0- (CH 2 ) m -0,
  • G represents a single bond, 0 or S
  • R represents alkyl or hydrogen
  • n an integer from 1 to 15
  • g and h are independently integers from 0 to 10.
  • Very particularly preferred oligomers according to the invention are those in which The groups A are selected independently of one another under groups of the formula
  • the groups B are selected independently of one another under groups of the formula
  • n is an integer from 4 to 12;
  • n an integer from 4 to 10;
  • the groups Y independently of one another are -CO-O- or -O-CO-, and
  • the oligomers of the invention preferably have the formula
  • the oligomers according to the invention contain the groups A, B and Z in the molar ratio A / B / Z from about 0.05 to 2 / about 1 to 30 / about 0.5 to 5, in particular from about 0.1 to 1 / about 4, 5 to 20 / about 1.5 to 2.5 condensed.
  • the glass transition temperature (determined by means of DSC) of the oligomers according to the invention is approximately in the range from 80 to 300 ° C., in particular approximately 90 to 200 ° C., particularly preferably approximately 90 to 140 ° C.
  • cholesteric polymeric networks can be obtained, which are a further subject of the present invention.
  • the cholesteric oligoesters or oligocarbonates according to the invention can be prepared by various condensation reactions which are familiar to the person skilled in the art and which, for polyesters, include H.R. Kricheldorf, N. Probst; Macromol. Rapid. Commun., 16, 231 (1995) and N. Probst, H.R. Kricheldorf; High perform. Polym., 7, 461 (1995) and for polycarbonates are known from DE-A-19631658.
  • the oligoesters according to the invention are preferably produced at elevated temperature, but below the crosslinking temperature of the reactants or reaction products, generally in the range from 120 ° C. to 250 ° C., the temperature in this range also being able to be increased in stages.
  • the oligoesters according to the invention at low temperature, e.g. B. in the range of -10 to +50 ° C.
  • the reaction time can vary within a wide range. In general, it is 1 to 48 hours, in particular 1 to 24 hours.
  • free diols of the formula A- (OH) 2 are activated with activated dicarboxylic acids, in particular with dicarboxylic acid dichlorides of the formula B- (C0C1) 2 and with groups or radicals of the formula Z-OH and, if appropriate with free diols Formula B- (OH) 2 in a suitable inert solvent, especially an inert organic solvent, e.g. B.
  • the chain length of the oligomers according to the invention can be adjusted via the amount of groups or residues of the formula Z-OH used and / or via the time of their addition.
  • the condensation is expediently in the presence of a base, for. B. pyridine, N-methylmorpholine or a trialkylamine, especially triethylamine as HCl acceptor.
  • a pressure-resistant stirred tank with gas inlet and outlet lines, for example, is suitable as the reaction vessel.
  • the process is preferably carried out under nitrogen.
  • the oligoester obtained is dried at elevated temperature, for example at about 80 ° C. in vacuo. If necessary, the oligoester is subjected to a cleaning step by redissolving in one of the abovementioned solvents and precipitating with methanol. If the oligomer is soluble in the solvent used, the organic phase is separated off and the oligoester is obtained therefrom in a conventional manner, eg. B. by taking up in methanol and filtering off. However, if the oligomer precipitates out of the solvent or if gel formation occurs, the reaction mixture is optionally diluted, e.g. B. with methanol, and the oligomer is filtered off.
  • the oligocarbonates according to the invention are generally prepared at a reaction temperature which is approximately in the range from 0 ° C. to ambient temperature. However, it can also be higher, in particular to complete the reaction.
  • the reaction time is variable over a wide range; it is generally 10 minutes to 24 hours, especially 10 minutes to 5 hours.
  • groups of the formulas A- (0H) 2 and B- (OH) 2 are dissolved in an amine, preferably a tertiary or aromatic amine, for example pyridine or triethylamine.
  • Groups or radicals of the formula Z-OH are dissolved in the same solvents, either separately from the diols or together with them.
  • Phosgene, diphosgene or triphosgene is in a suitable organic solvent, e.g. B.
  • an ether such as tetrahydrofuran or dioxane, a chlorinated hydrocarbon such as dichloromethane, 1, 1-2,2-tetrachloroethane, 1-chloronaphthalene, chlorobenzene or 1,2-dichlorobenzene.
  • This solution is added to the solution containing the diols and optionally the groups or the residues of the formula Z-OH with stirring.
  • the groups or radicals of the formula Z-OH are not together with the diols dissolved, the solution containing Z-OH is added to the ongoing condensation reaction.
  • the chain length of the oligomers according to the invention can be set via the amount of groups or radicals of the formula Z-OH used and / or via the time of addition.
  • the organic phase is separated off and the oligocarbonate is obtained therefrom in a conventional manner, e.g. B. by taking up in methanol and filtering off. If, on the other hand, the oligomer precipitates out of the solvent or if gel formation occurs, the reaction mixture is diluted, if necessary, e.g. B. with methanol, and the oligomer is filtered off.
  • phosgene diphosgene or triphosgene
  • the chlorinated carbonic acid esters or carbonic acid diesters of the alcohols or diols to be condensed can also be used.
  • the oligomers according to the invention contain groups A and B in a statistical distribution.
  • the cholesteric oligomers according to the invention can be used in particular as surface coating material or for the production of pigments.
  • the pigments can be prepared in a customary manner by applying the cholesteric oligomers according to the invention to a surface using one of the customary application methods (knife coating, pouring, spraying, etc.), optionally reorienting the oligomer layer, crosslinking the oligomer layer, detaching the oriented crosslinked film the surface and grinding to platelet-shaped pigments.
  • Single or multilayered pigments which contain cholesteric oligomers according to the invention or cholesteric polymer networks according to the invention are therefore a further subject of the present invention.
  • cholesteric polymeric networks according to the invention or the pigments according to the invention can be used in particular in the vehicle and vehicle accessories sector, in the EDP, leisure, sports and games sector, as optical components, such as polarizers or filters, in the cosmetics sector, in the textile, leather or jewelry sector, be used in the field of gifts, in writing utensils or on spectacle frames, in the construction sector, in the household sector and in all types of printed matter, as well as for the production of paints and varnishes.
  • the color effects which can be achieved by the cholesteric polymeric networks or pigments according to the invention also include, owing to the diversity of the reflection wavelengths which can be achieved the UN and IR ranges and of course the range of visible light.
  • the pigments according to the invention are applied to banknotes, check cards, other cashless means of payment or identity cards (for example by known printing processes) or incorporated into them, this makes identical copying, in particular the counterfeiting of these objects, considerably more difficult.
  • Another object of the present invention is therefore the use of the polymeric networks or pigments according to the invention for the processing of objects, in particular banknotes, check cards or other cashless means of payment or identification, which makes counterfeiting difficult.
  • Another object of the present invention is the use of the polymeric networks or pigments according to the invention for coating everyday objects and for painting vehicles.
  • the present invention further relates to compositions, in particular coating or coating agents, paints or lacquers, which contain pigments according to the invention.
  • compositions according to the invention generally contain, in addition to the pigments according to the invention, customary leveling agents, binders and one or more substances which are or are selected from water-based paints, for example in the form of aqueous dispersions such as P.MA, SA, polyvinyl derivatives, PVC, Polyvinylidene chloride, SB-Copo, PV-AC-Copo-resins, or in the form of water-soluble binders, such as shellac, maleic resins, colophony-modified phenolic resins, linear and branched, saturated polyesters, aminoplast-crosslinking, saturated polyesters, fatty acid -modified alkyd resins, plasticized urea resins, or in the form of water-dilutable binders, such as PUR dispersions, EP resins, urea resins, melamine resins, phenolic resins, alkyd resins, alkyd resin emulsions, silicone resin emulsions; Powder sheets
  • compositions according to the invention can also contain stabilizers against UV and weather influences and additionally inorganic or organic pigments.
  • the pigments according to the invention can be incorporated individually or in mixtures into the compositions according to the invention and, if appropriate, additionally aligned there by methods which trigger shear forces. Suitable methods for aligning the pigments according to the invention are, for example, printing or knife coating.
  • Both the coating of surfaces with cholesteric oligomers according to the invention and the coating of articles of daily use with compositions according to the invention can be carried out by customary surface coating methods, such as knife coating, air knife coating, squeeze coating, impregnation coating, reverse roller coating, transfer roller coating, "kiss coating", Spray coating, spin coating or cast coating, as described in DE-A-19740181, consequences.
  • suitable surface coating processes are the customary printing processes (eg high, low, flexographic, offset or screen printing), which are described, for example, in WO 96/02597, to which reference is hereby made in full.
  • the monomers shown in Scheme 1 were dissolved in 20 ml of 1-chloronaphthalene in the amounts indicated in Scheme 2 and placed in a cylindrical glass reactor which was equipped with a mechanical stirrer and gas inlet and outlet.
  • the reaction vessel was placed in an oil bath preheated to 120 ° C and the temperature was quickly raised to 200 ° C.
  • the reaction mixture was stirred at 200 ° C under nitrogen for 6 hours.
  • the reaction product was dissolved in dichloromethane / trifluoroacetic acid (volume ratio 4: 1), precipitated in methanol and dried at 80 ° C. in vacuo.
  • Oligomer 1 10 M + 40 C + 15 E + 45 K + 5 X
  • Oligomer 2 10 M + 20 C + 10 E + 25 K + 2.5 X
  • Oligomer 3 10 M + 20 C + 10 E + 23.75 K + 1.25 X
  • Oligomer 4 10 M + 10 C + 5 E + 9.375 K + 0.625 X
  • Oligomer 5 10 M + 20 C + 10 O + 23.75 K + 1.25 X
  • Oligomer 6 10 M + 10 C + 5 0 + 9.375 K + 0.625 X
  • Oligomer 7 10 M + 20 C + 20 H + 32.5 K + 2.5 X
  • Oligomer 8 10 M + 10 C + 10 H + 14.375 K + 0.625 X
  • Oligomer 9 10 M + 20 C + 10 O + 23.75 L + 1.25 X
  • Oligomer 10 10 M + 10 C + 5 0 + 9.375 L + 0.625 X
  • Oligomer 11 10 M + 20 C + 10 J + 23.75 K + 1.25 X
  • Oligomer 12 10 M + 10 C + 5 J + 9.375 K + 0.625 X
  • Oligomer 13 10 N + 20 C + 10 O + 23.75 L + 1.25 X
  • Oligomer 14 10 N + 10 C + 5 0 + 9.375 L + 0.625 X
  • Oligomer 15 10 N + 20 C + 20 H + 32.5 L + 2.5 X
  • Oligomer 16 10 N + 10 C + 10 H + 14.375 L + 0.625 X

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Liquid Crystal Substances (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne des oligomères cholestériques correspondant à la formule (I): [(Z<1>n-Y<1>-)\(A-Y<2>-)q\(B-Y<3>-)p\Z<2>], dans laquelle: n correspond en moyenne à une valeur pouvant aller de 0 à 1; q correspond en moyenne à une valeur pouvant aller de 0,1 à 2; p correspond en moyenne à une valeur pouvant aller de 1 à 20; A représente un groupe chirale; B représente un groupe mésogène; Y1, Y<2> et Y<3> représentent, indépendamment l'un de l'autre, un groupe correspondant à la formule -CO-O, -O-CO- ou -O-CO-O-, les unités à indice q (A-Y<2>-) et les unités à indice p (B-Y<3>-) pouvant être présentes dans n'importe quel ordre, les groupes A à indice q étant identiques ou différents et les groupes B à indice p étant également identiques ou différents; Z<1> et Z<2> représentent, indépendamment l'un de l'autre, un groupe correspondant à la formule W-Q-, dans laquelle Q représente une liaison chimique ou un séparateur alkylène ou arylène à une ou plusieurs substitutions; W représente un groupe hétérocyclique réticulable. L'invention concerne également un procédé de production de ces oligomères et leur utilisation.
EP98961151A 1997-11-06 1998-11-06 Oligomeres cholesteriques a groupes terminaux reticulables Ceased EP1029021A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19749123A DE19749123A1 (de) 1997-11-06 1997-11-06 Cholesterische Oligomere mit vernetzbaren Endgruppen
DE19749123 1997-11-06
PCT/EP1998/007110 WO1999024529A1 (fr) 1997-11-06 1998-11-06 Oligomeres cholesteriques a groupes terminaux reticulables

Publications (1)

Publication Number Publication Date
EP1029021A1 true EP1029021A1 (fr) 2000-08-23

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EP98961151A Ceased EP1029021A1 (fr) 1997-11-06 1998-11-06 Oligomeres cholesteriques a groupes terminaux reticulables

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EP (1) EP1029021A1 (fr)
JP (1) JP2001522927A (fr)
KR (1) KR20010031812A (fr)
DE (1) DE19749123A1 (fr)
WO (1) WO1999024529A1 (fr)

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Publication number Priority date Publication date Assignee Title
US6140422A (en) * 1998-04-23 2000-10-31 E.I. Dupont De Nemours And Company Polyesters including isosorbide as a comonomer blended with other thermoplastic polymers
DE19940681A1 (de) 1999-08-27 2001-03-01 Basf Ag Cholesterisches Schichtmaterial mit verbesserter Farbbeständigkeit und Verfahren zu dessen Herstellung
DE19940682A1 (de) 1999-08-27 2001-03-01 Basf Ag Cholesterisches Schichtmaterial mit verbessertem Farbeindruck und Verfahren zu dessen Herstellung
US6939940B2 (en) 2000-09-13 2005-09-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Liquid crystalline thermosets from ester, ester-imide, and ester-amide oligomers
JP2002097392A (ja) * 2000-09-22 2002-04-02 Toppan Forms Co Ltd 偽造防止用インキおよびそれを用いた偽造防止用シート
EP1486324B1 (fr) * 2003-06-11 2006-11-08 ContiTech Elastomer-Beschichtungen GmbH Materiaux composites pour voitures decapotables
JP2017078180A (ja) * 2012-09-28 2017-04-27 株式会社ダイセル 熱硬化性液晶ポリエステル組成物の製造方法及び硬化物の製造方法
JP6128804B2 (ja) * 2012-09-28 2017-05-17 株式会社ダイセル 熱硬化性液晶ポリエステル組成物及びその硬化物
KR20220110957A (ko) * 2021-02-01 2022-08-09 주식회사 엘지화학 폴리카보네이트 및 이의 제조방법

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DE19504913A1 (de) * 1995-02-15 1996-08-22 Basf Ag Neue chiral neumatische Polyester
DE19538700A1 (de) * 1995-10-18 1997-04-24 Hoechst Ag Cholesterische Phasen bildende Polymere, Verfahren zu deren Herstellung sowie Verwendung
DE19602795A1 (de) * 1996-01-26 1997-07-31 Basf Ag Verfahren zur Herstellung von Pigmentpartikeln
DE19602848A1 (de) * 1996-01-26 1997-07-31 Basf Ag Verfahren zur Herstellung von Pigmenten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9924529A1 *

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JP2001522927A (ja) 2001-11-20
KR20010031812A (ko) 2001-04-16
DE19749123A1 (de) 1999-05-12
WO1999024529A1 (fr) 1999-05-20

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