EP3440049A1 - Trimethylolpropan-derivate - Google Patents
Trimethylolpropan-derivateInfo
- Publication number
- EP3440049A1 EP3440049A1 EP17714461.5A EP17714461A EP3440049A1 EP 3440049 A1 EP3440049 A1 EP 3440049A1 EP 17714461 A EP17714461 A EP 17714461A EP 3440049 A1 EP3440049 A1 EP 3440049A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compositions
- coating
- acrylic acid
- trimethylolpropane
- compounds
- 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- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/533—Monocarboxylic acid esters having only one carbon-to-carbon double bond
- C07C69/54—Acrylic acid esters; Methacrylic acid esters
Definitions
- the present invention relates to trimethylolpropane derivatives of special structure which are suitable for coating the surfaces of solid substrates, in particular of wood and paper.
- DE-A-102010044206 proposes radiation-curable mixtures obtainable by reacting (meth) acrylic acid with 3.0- to 4.0-fold propoxylated glycerol, followed by removal of excess (meth) acrylic acid from the reaction mixture obtained with the aid of an aqueous Extraction.
- EP-A-280,222 describes reaction products of esters (i) of acrylic acid and / or methacrylic acid and a polyhydric alcohol with a primary monoamine (ii). Suitable esters (i) are based, for example, on trimethylolpropane (cf., page 2, line 36).
- EP-A-680.985 describes a process for the preparation of radiation-curable acrylates, in which in a first stage hydroxy compounds are reacted with (meth) acrylic acid and the resulting reaction product is subsequently reacted with epoxides in or before the subsequent second stage.
- the hydroxy compounds may be polyols, in particular trimethylolpropane, glycerol or pentaerythritol.
- the polyols may be oxalkylated, it being merely disclosed that the degree of alkoxylation may be 0 to 10 and preferably 1 to 10. Description of the invention
- the object of the present invention was to provide substances which are suitable for coating the surfaces of solid substrates, in particular wood and paper, wherein the curing of the coating takes place by radiation curing, in particular with UV light.
- the cured coatings, in particular the UV-cured coatings should have good properties in terms of hardness and elasticity, which are quantified by the metrological parameters pendulum hardness (König) and Erichsentiefung.
- the pendulum hardness of the substances should be in the range of 116 to 128 sec with simultaneous Erichsentiefung of 1.8 to 3.1 mm.
- Another object was that the substances as such have good flow properties, in particular on slightly cleaned surfaces, so that on the one hand the additional use of leveling agents in UV lacquers can be completely or partially dispensed with and on the other hand a saving or reduction of elaborate purification steps in the sense of pretreatment of a substrate to be coated is possible.
- compositions (II) are compositions which are obtainable by reacting ethylene oxide Trimethylolpropane attached, wherein the compositions (II) have an OH number (hydroxyl number) in the range of 538 to 572 mg KOH / g - measured according to DIN 53240 -, wherein in the reaction of the compositions (II) with (meth) acrylic acid the Conversion ratios of the reactants adjusted so that per mole of OH groups of the compositions (II) 0.8 to 1.3 mol of (meth) acrylic acid used.
- the reaction ratios of the reactants are from 1.08 to 1.3 mol of (meth) acrylic acid per mole of OH groups of the compositions (II) starts.
- the use of acrylic acid is preferred.
- the compositions (II) have an OH number (hydroxyl number) in the range from 554 to 572 mg KOH / g, measured in accordance with DIN 53240.
- Particularly preferred are those substances (I) whose pendulum hardness (König) in the range of 116 to 128 sec, with simultaneous Erichsentiefung from 1.8 to 3.1 mm.
- the Hazen color number (determined according to DIN EN ISO 6162, cf. the example part of the present application) of the substances (I) is below 30.
- the substances (I) have an acid number - determined according to ISO 3682 - of less than 50 and in particular less than 10 mg KOH / g.
- compositions (II) can be prepared per all methods known to the chemist.
- the compositions (II) are prepared by reacting ethylene oxide in the presence of a base, preferably sodium hydroxide, potassium hydroxide or sodium methoxide, with trimethylolpropane at elevated temperature.
- the compositions (II) are essentially mixtures of trimethylolpropane, oligo-trimethylolpropanes, ethoxylated trimethylolpropane and ethoxylated oligotrimethylolpropanes.
- the proportion of trimethylolpropane and oligotrimethylolpropanes in the compositions (II) is less than 0.35 mol% - based on the total composition (II).
- the bases to be used for the ethoxylation of trimethylolpropane as catalysts may also be: cesium hydroxide, trimethylamine, triethylamine, tripropylamine, tributylamine, N, N'-dimethylethanolamine, ⁇ , ⁇ '-dimethylcyclohexylamine, dimethylethylamine, dimethylbutylamine, ⁇ , ⁇ '-dimethylaniline , 4-dimethylaminopyridine, ⁇ , ⁇ '-dimethylbenzylamine, pyridine, imidazole, N-methylimidazole, 2-methylimidazole, 4-methylimidazole, 5-methylimidazole, 2-ethyl-4-methylimidazole, 2,4-dimethylimidazole, 1-hydroxypropylimidazole, 2,4,5-trimethylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, N-phenylimidazole
- the compounds (I) can be prepared per all methods known to the chemist.
- the compounds (I) are preferably prepared as follows: The compositions (II) are reacted with (meth) acrylic acid, the reaction ratios of the reactants being adjusted in the reaction of the compositions (II) with (meth) acrylic acid in such a way 0.8 to 1.3 mol of (meth) acrylic acid are used per mole of OH groups of the compositions (II). If free acrylic acid is still present in the resulting product mixture, it is preferably removed, in particular by distilling off and / or washing.
- an extraction with aqueous medium is preferably used for washing out (compare, for example, the relevant disclosure of DE-A-102010044206).
- compositions comprising one or more trimethylolpropane derivatives (I). Preference is given to coating compositions whose compounds (I) are reaction products of compositions (II) with acrylic acid.
- Another subject of the invention is the use of the compounds (I) for coating the surfaces of solid substrates.
- the nature of the substrate is not limited per se. Examples of suitable substrates are for example textile, leather, metal, plastic, glass, wood, paper or cardboard. Preferred substrates are wood and paper.
- coating compositions comprising one or more trimethylolpropane derivatives (I) for coating the surfaces of solid substrates.
- the nature of the substrate is not limited per se. Examples of suitable substrates are for example textile, leather, metal, plastic, glass, wood, paper or cardboard. Preferred substrates are wood and paper.
- coating compositions encompasses any type of compositions which are applied to the surface of a substrate to be coated and then cured, if appropriate after previous drying, in particular the term “coating compositions" includes all types of coatings.
- the term "lacquer” is to be understood as meaning a coating composition which may be liquid or pulverulent and which is applied thinly in thin layers to an article, ie the substrate to be coated, and then cured also the section below on the term “coating”.
- the coating compositions according to the invention may additionally contain further typical coatings additives, for example antioxidants, stabilizers, activators (accelerators), fillers, pigments, dyes, antistatic agents, flame retardants, thickeners, thixotropic agents, surface-active agents, viscosity modifiers, plasticizers or chelating agents.
- the coating compositions according to the invention may also comprise further radiation-curable components which are not encompassed by the formula (I).
- chelating agents e.g. Ethylenediamine and their salts and ß-diketones are used.
- Suitable fillers include silicates, e.g., silicates obtainable by hydrolysis of silicon tetrachloride, such as Aerosil® from Degussa, silica, talc, aluminum silicates, magnesium silicates, calcium carbonates, etc.
- silicates e.g., silicates obtainable by hydrolysis of silicon tetrachloride, such as Aerosil® from Degussa, silica, talc, aluminum silicates, magnesium silicates, calcium carbonates, etc.
- Suitable stabilizers include typical UV absorbers such as oxanilides, triazines and benzotriazole (the latter being available as Tinuvin® grades from Ciba Specialty Chemicals) and benzophenones. These may be used alone or together with suitable radical scavengers, for example sterically hindered amines such as 2,2,6,6-tetramethylpiperidine, 2,6-di-tert-butylpiperidine or derivatives thereof, eg. As bis (2,2,6,6-tetra-methyl-4-piperi-dyl) sebacinate used. stabilizers Ren are usually used in amounts of 0.1 to 5.0 wt .-%, based on the solid components contained in the preparation.
- suitable radical scavengers for example sterically hindered amines such as 2,2,6,6-tetramethylpiperidine, 2,6-di-tert-butylpiperidine or derivatives thereof, eg. As bis (2,2,6,6-
- Pigments may also be included in the coating compositions. Pigments are according to CD Römpp Chemie Lexikon - Version 1.0, Stuttgart / New York: Georg Thieme Verlag 1995 with reference to DIN 55943 particulate "practically insoluble in the application medium, inorganic or organic, colored or achromatic colorants". In this case, practically insoluble means a solubility at 25 ° C. under 1 g / 1000 g of application medium, preferably below 0.5, more preferably below 0.25, even more preferably below 0.1 and in particular below 0.05 g / 1000 g of application medium.
- pigment it must be ensured that either the curing is carried out with electron beams or that a photoinitiator is used which can be activated despite the pigmentation by the incident radiation, for example by the photoinitiator a significant absorbance in a wavelength range in which the pigment is sufficiently permeable to the incident radiation. It is a preferred embodiment of the present invention not to use pigment and to use the coating composition in clearcoats.
- pigments include any systems of absorption and / or effect pigments, preferably absorption pigments. Number and selection of the pigment components are not subject to any restrictions. They can be adapted to the respective requirements, for example the desired color impression, as desired.
- Effect pigments are to be understood as meaning all pigments which have a platelet-like structure and impart special decorative color effects to a surface coating.
- the effect pigments are, for example, all effect pigments which can usually be used in vehicle and industrial coating.
- Examples of such effect pigments are pure metal pigments; such as aluminum, iron or copper pigments;
- Interference pigments such as titanium dioxide-coated mica, iron oxide-coated mica, mixed oxide-coated mica (eg with titanium dioxide and Fe 2 O 3 or titanium dioxide and Cr 2 O 3 ), metal oxide-coated aluminum, or liquid crystal pigments.
- the coloring absorption pigments are, for example, customary organic or inorganic absorption pigments which can be used in the coatings industry.
- Examples of organic absorption pigments are azo pigments, phthalocyanine, quinacridone and pyrrolopyrrole pigments.
- Examples of inorganic absorption pigments are iron oxide pigments, titanium dioxide and carbon black.
- Mono- and / or bisacylphosphine oxides such as 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (Irgacure® TPO from BASF SE), ethyl 2,4,6-trimethylbenzoylphenylphosphinate (TPO-L from BASF SE), bis ( 2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure® 819 from BASF SE),
- Benzophenones hydroxyacetophenones, phenylglyoxylic acid and its derivatives or mixtures of these photoinitiators. Examples which may be mentioned are: benzophenone, acetophenone, acetonaphthoquinone, methyl ethyl ketone, valerophenone, hexanophenone, ⁇ -phenylbutyrophenone, p-morpholinopropiophenone, dibenzosuberone, 4-morpholinobenzophenone, 4-morpholinodeoxybenzoin, p-diacetylbenzene, 4-aminobenzophenone, 4 ' Methoxyacetophenone, ⁇ -methylanthraquinone, tert-butylanthraquinone, anthraquinone carboxylic acid ester, benzaldehyde, ⁇ -tetralone, 9-acetylphenanthrene, 2-acetylphenanthrene,
- non-yellowing or slightly yellowing photoinitiators of the phenylglyoxalic ester type are also suitable.
- mixtures of different photoinitiators include, for example, 2-hydroxy-2-methyl-1-phenylpropan-2-one and 1-hydroxycyclohexyl phenyl ketone, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide and 2-hydroxy 2-methyl-1-phenyl-propan-1-one, benzophenone and 1-hydroxycyclohexyl phenyl ketone, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide and 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyldiphenylphosphine oxide and 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2,4,6-trimethylbenzophenone and 4-methylbenzophenone or 2,4,6-trimethylbenzophenone and 4-methylbenzophenone and 2,4,6
- Preferred photoinitiators are:
- ITX derivatel-isopropyl-thioxanthone, 2-isopropyl-thioxanthone, 3-isopropyl-thioxanthone, 4-isopropyl-thioxanthone, 1-chloro-4-popoxy-9H-thioxanthone-9-one, and
- the coating compositions contain the photoinitiators preferably in an amount of 0.05 to 10 wt .-%, particularly preferably 0.1 to 8 wt .-%, in particular 0.2 to 5 wt .-%, based on the total amount of in the Coating compositions existing curable components.
- Another object of the invention is a process for coating the surfaces of solid substrates, wherein one or more compounds (I) or coating compositions containing one or more compounds (I) applied to the surface of a solid substrate and then performs radiation curing, in particular by means UV light. It is preferred that the radiation curing is a curing with UV light of the wavelength in the range of 200 to 500 nm.
- Coating also referred to as “coating” means processes which serve to apply a firmly adhering layer to the surface of a workpiece - the substrate.
- the applied layer is called a coating.
- the usual coating methods differ by the way in which the coating compositions are applied in chemical, mechanical, thermal and thermomechanical processes.
- UV curing is preferred, which induces chemical crosslinking of the compounds (I) contained in the coating compositions.
- the coating of the surfaces of solid substrates with the compounds (I) to be used according to the invention is carried out by customary methods known to the person skilled in the art, wherein the desired compound (I) or a coating composition which contains one or more compounds (I) in the desired strength the substrate is applied and at least partially radiation hardened.
- the application to the substrate can in a known manner, for. Example, by spraying, filling, doctoring, brushing, rolling, rolling, casting, lamination, injection molding or co-extrusion, preferably by spraying and rolling.
- a spraying method e.g. Air pressure, Airless or electrostatic spray application find.
- the coating thickness is preferably adjusted so that the coating thickness of the uncured acrylate is in a range of about 3-1000 g / m 2 and preferably 10-200 g / m 2 .
- dry film thickness is understood to mean the layer thickness a dried or cured coating.
- drying in this context implies that solvents present in a coating composition, for example water or organic solvents, have evaporated.
- hardening implies that crosslinking of the coating composition takes place. It should be emphasized that the term dry film thickness is to be understood purely phenomenologically here as the layer thickness which has a dried and / or hardened coating.
- UV light or electron radiation is preferred.
- UV light is preferred in the wavelength range of 200 to 500 nm, and more preferably 250 to 400 nm.
- Tg value glass transition temperature
- the radiation curing can be carried out under oxygen-containing atmosphere or under inert gas, the latter being preferred.
- drying and / or radiation curing can take place after each coating operation.
- Suitable radiation sources for radiation curing are, for example, low-pressure mercury lamps, medium-pressure lamps with high-pressure lamps and fluorescent tubes, LED lamps, pulse emitters, metal halide, laser, pulsed lamps (flash), halogen lamps electronic flash devices, which radiation curing without photoinitiator is possible, or Excimerstrahler. It is also possible to use a plurality of radiation sources for radiation curing, for example two to four. If desired, these can also radiate in different wavelength ranges.
- the irradiation may optionally also in the absence of oxygen, for. B. under inert gas atmosphere, carried out.
- inert gases are preferably nitrogen, noble gases, carbon dioxide, or combustion gases.
- Another subject of the invention is the use of the compounds (I) for the preparation of Michael adducts, which are obtainable by reacting the compounds (I) with amines.
- an amine suitable for Michael addition must have at least one NH function.
- Particularly suitable amines are: compounds with primary or secondary amines having a molecular weight below 1000 g / mol.
- primary monoamines such as C 1-20 -alkylamines, in particular n-butylamine, n-hexylamine, 2-ethylhexylamine, octadecylamine and cycloaliphatic amines cyclopentylamine or cyclohexylamine or primary amines containing ether groups, such as methoxypropylamine.
- secondary amines include di-C 1 -C 20 -alkylamines, in particular diethylamine, di-n-butylamine, di-n-hexylamine, and di-isopropylamine.
- alkanolamines for example mono- or diethanolamine, dimethylethanolamine, aminoethoxyethanol, 2-aminopropan-1-ol and diisopropanolamine, are mentioned.
- Viscosity The viscosity of the substances as such was measured with a Brookfield viscometer at 25 ° C, speed gradient of 1000 s-1, according to DIN EN ISO 3219 / A.3. Acid value: Measured according to DIN EN ISO 2114
- Pendulum damping The pendulum damping (often referred to as pendulum hardness) of coatings which resulted when the substances to be tested had been applied to the surfaces of solid substrates and cured by UV radiation, the so-called King pendulum hardness, were measured according to DIN 53157. In this method, the pendulum damping is specified in seconds.
- Erichsen indentation is a measure of the elasticity of coatings.
- Hazen color number The Hazen color number was measured with the Lange Lico 400 device in accordance with DIN EN ISO 6271.
- Paint course The course of the paint after curing with UV radiation was determined as follows: A photo of the paint on the glass was taken with a Nikon CoolPix 990 camera and processed digitally in the computer. Based on this photo, the areas covered with paint were marked. The area of the marked areas was determined by means of a box net as cm 2 . The area thus determined was compared with the uncovered glass surface of the glass tile (10cm x 6cm) to be painted. To compensate ev. Different viscosities, was again divided by the weight of the paint film. Examples
- TMP trimethylolpropane
- NaOH sodium hydroxybenzyl ether
- the kettle was heated to 170-175 ° C and the 927.7 g (21.06 mol) of ethylene oxide added within 3.1 hours. After a reaction time of 0.7 hours was evacuated for 30 minutes under full vacuum at 60-100 ° C and then cooled to 60 ° C. The workup was carried out by neutralization with 0.43 g of acetic acid to pH 5.5. The product obtained was a light liquid. There were obtained 1730 g of product.
- Comparative Examples V6 to V10 were prepared, wherein in each case the substances according to Comparative Examples VI to V5 were esterified with acrylic acid.
- the substances according to Comparative Examples V6 to V10 and the substance according to Example 2 were characterized and the corresponding values can be taken from Table 2:
- Example 2 and Comparative Examples V6 to VI 0 were mixed with 5 wt% Irgacure 500 (photoinitiator), applied with a doctor blade (120 ⁇ m gap width) to Bonder® sheet and glass, then with 1900 mJ / m mercury vapor lamp) Hardened at a belt speed of 10m / min under nitrogen.
- an IST UV system was used (type: M-40-2xl-R-TR-SLC-SO-Inert, lamp 1: IST UV lamp M400 U2HC, lamp 2: IST UV lamp M400 U2H ).
- the paint properties were determined after storage in a climate chamber for at least 24 hours.
- the glass used had been previously processed (float glass cut, with packaging paper (paper, 80 g / m 2 ) stored between the glass plates, thereby so-called paper marks (contamination by paper residues) are created). Curing took place under a nitrogen atmosphere with an energy input of 1900 mJ / cm 2 . Subsequently, the determination of pendulum damping (PD), Erichsentiefung (Ew) and the paint course on the low-cleaned glass. The results are shown in Table 3.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16164358 | 2016-04-08 | ||
PCT/EP2017/057567 WO2017174436A1 (de) | 2016-04-08 | 2017-03-30 | Trimethylolpropan-derivate |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3440049A1 true EP3440049A1 (de) | 2019-02-13 |
Family
ID=55699556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17714461.5A Withdrawn EP3440049A1 (de) | 2016-04-08 | 2017-03-30 | Trimethylolpropan-derivate |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3440049A1 (de) |
WO (1) | WO2017174436A1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3706355A1 (de) | 1987-02-27 | 1988-09-08 | Basf Ag | Additionsprodukte aus acrylaten und aminen sowie deren verwendung in strahlungshaertbaren massen |
DE4415624A1 (de) | 1994-05-04 | 1995-11-09 | Basf Ag | Verfahren zur Herstellung von strahlungshärtbaren Acrylaten |
DE19834360A1 (de) * | 1998-07-30 | 2000-02-03 | Bayer Ag | Verfahren zur Herstellung von Estern der (Meth)acrylsäure |
DE102010044206A1 (de) | 2009-11-25 | 2011-05-26 | Basf Se | Verfahren zur Herstellung von strahlungshärtbaren (Meth)Acrylaten |
-
2017
- 2017-03-30 WO PCT/EP2017/057567 patent/WO2017174436A1/de active Application Filing
- 2017-03-30 EP EP17714461.5A patent/EP3440049A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2017174436A1 (de) | 2017-10-12 |
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