EP0817811A1 - Composes cationiques a structure en couche, leur production et leur application - Google Patents

Composes cationiques a structure en couche, leur production et leur application

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Publication number
EP0817811A1
EP0817811A1 EP96908052A EP96908052A EP0817811A1 EP 0817811 A1 EP0817811 A1 EP 0817811A1 EP 96908052 A EP96908052 A EP 96908052A EP 96908052 A EP96908052 A EP 96908052A EP 0817811 A1 EP0817811 A1 EP 0817811A1
Authority
EP
European Patent Office
Prior art keywords
hydroxide
acid
alkali metal
carbon atoms
aluminum hydroxide
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Withdrawn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
EP96908052A
Other languages
German (de)
English (en)
Inventor
Wolfgang Breuer
Christoph Lohr
Jörg-Dieter KLAMANN
Wolfgang Ritter
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 Personal Care and Nutrition GmbH
Original Assignee
Henkel AG and Co KGaA
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Filing date
Publication date
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Publication of EP0817811A1 publication Critical patent/EP0817811A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/07—Aldehydes; Ketones
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/36—Methods for preparing oxides or hydroxides in general by precipitation reactions in aqueous solutions
    • C01B13/366—Methods for preparing oxides or hydroxides in general by precipitation reactions in aqueous solutions by hydrothermal processing
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/78—Compounds containing aluminium, with or without oxygen or hydrogen, and containing two or more other elements
    • C01F7/784—Layered double hydroxide, e.g. comprising nitrate, sulfate or carbonate ions as intercalating anions
    • C01F7/785—Hydrotalcite
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G9/00—Compounds of zinc
    • C01G9/006—Compounds containing zinc, with or without oxygen or hydrogen, and containing two or more other elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/20—Two-dimensional structures
    • C01P2002/22—Two-dimensional structures layered hydroxide-type, e.g. of the hydrotalcite-type

Definitions

  • the invention relates to special cationic layer compounds of the hydrotalcite type, processes for producing the same and their use as co-stabilizers for halogen-containing plastics stabilized in particular with calcium and / or zinc salts.
  • Halogen-containing plastics or molding compositions made from them are known to tend to degrade or decompose when exposed to heat or when exposed to ultraviolet light.
  • heavy metal compounds based on lead, tin, barium and / or cadmium are conventionally used. From a work physiological point of view, however, there is a need to exchange these very effective stabilizers for less harmful substances.
  • the heavy metal compounds for example calcium and zinc soaps can be considered as stabilizers, but they do not achieve the performance of the above heavy metal compounds, so that co-stabilizers are required to increase their stabilizing effect.
  • German patent DE-C-30 19 632 describes the use of hydrotalcites for inhibiting the thermal or ultraviolet degradation of halogen-containing thermoplastic resins.
  • German patent DE-C-30 19 632 proposes hydrotalcites with a large crystal grain and with a BET specific surface area of not more than 30 m 2 / g, which may be coated with an anionic surface-active agent such as sodium stearate can be use.
  • Resin compositions are also described in European patent application EP-A-189 899 which contain hydrotalcites with BET specific surface areas of less than 30 ⁇ m / g. From this European patent application it is known that the hydrotalcites can be modified with higher fatty acid esters, anionic surface-active agents and coupling agents of the silane or titanium types in order to improve the compatibility of the hydrotalcite with the plastic compositions.
  • the hydrotalcites are to be modified by mechanical mixing of hydrotalcites with the modifying agents in pure or dissolved form.
  • the patent DE-C-33 06 822 teaches that by reacting "active" aluminum hydroxide with magnesium hydroxide or magnesium oxide in the presence of basic magnesium carbonate as carbonate ion donor at a temperature of 50 ° C to 100 ° C and subsequent spray drying from the suspension hydrotalcite of the formula [Mg5Al2 (0H) i2_l (C03) 3 • 4 H2O can be obtained.
  • This procedure presupposes the availability of "active" aluminum hydroxide, as can be obtained, for example, by precipitation from aluminum salt solutions and storage in gel form. Accordingly, this process requires an additional manufacturing step - the precipitation and washing out of the aluminum hydroxide gel - or makes it necessary to obtain such a gel from a manufacturer and thus to transport large amounts of water, which affects the economy of the process.
  • US-A-4 656 156 describes a manufacturing process for hydrotalcite, the aluminate solution of the Bayer process being used as the aluminum component.
  • the Bayer lye is reacted with "active" magnesium oxide, as can be obtained, for example, by calcining magnesium carbonate.
  • active magnesium oxide
  • DE-A-1592 126 describes the production of hydrotalcites from different starting materials, for example from a slurry of solid aluminum hydroxide, solid magnesium hydroxide and sodium hydrogen carbonate.
  • the reactions are carried out in batches, and the products are separated from the water phase by filtration or by centrifugation and washed before they are dried. Filtration or centrifugation of the very finely divided reaction products and their washing out represents a technically complex and time-consuming step that has a significant influence on the manufacturing costs.
  • the object of the present invention was to provide co-stabilizers for halogen-containing plastics and a process for their production, which
  • the present invention relates to agents for stabilizing halogen-containing plastics against thermal or photochemical degradation, comprising cationic layer compounds of the general formula (I)
  • ⁇ divalent metal ions
  • a n crystalline aluminum hydroxide with 1 to 20 mol%, based on aluminum hydroxide, of alkali metal hydroxide added, heated for a time between 10 and 240 minutes to a temperature between 100 and 240 ° C and dries to a powder without first separating the solid from the water phase.
  • the cationic layer compounds of the general formula I are known compounds, the structure and preparation of which are described, for example, by WT Reichle in Chemtec (January 1986), pages 58-63.
  • MUH represents at least one divalent metal ion selected from the group consisting of magnesium, calcium and zinc.
  • MU 1 preferably only stands for a divalent metal ion from the group mentioned and in particular for magnesium.
  • Cationic layer compounds of the general formula I are very particularly preferred, in which A n "stands for an acid anion with the charge n selected from the anion group carbonate, hydrogen carbonate, perchlorate, acetate, nitrate, tartrate, oxalate and iodide, preferably for carbonate
  • a n stands for an acid anion with the charge n selected from the anion group carbonate, hydrogen carbonate, perchlorate, acetate, nitrate, tartrate, oxalate and iodide, preferably for carbonate
  • n stands for an acid anion with the charge n selected from the anion group carbonate, hydrogen carbonate, perchlorate, acetate, nitrate, tartrate, oxalate and iodide, preferably for carbonate
  • indices x, y and z and m can be integers or fractional numbers within the Cationic layer compounds of the general formula I, in which Vli H) stands for magnesium and A
  • Suitable cationic layer compounds are synthetic hydrotalcites, which are also referred to as basic aluminum-magnesium carbonates and generally according to that in the German A usleschrift DE-B-15 92 126 and the methods described in German Offenlegungsschriften DE-A-20 61 114 or DE-A 29 05 256 can be produced.
  • Suitable sources of divalent metal ions are their carbonates, hydroxocarbonates, hydroxides, oxides or their water-soluble salts such as, for example, the nitrates, chlorides, sulfates or perchlorates. It is particularly preferred to choose sources of divalent metal ions that already contain the anion A n ⁇ . In this case it is not necessary to add an additional source of these anions. For example, it is particularly preferred to use at least some of the divalent metal ions as carbonates or as hydroxocarbonates. If the source of divalent metal ions is exclusively their oxides or hydroxides, it is necessary to use an additional source of the anions A n ", for example in the form of alkali metal salts.
  • alkali metal salts of carbonic acid and / or oxo acids of halogens such as, for example perchloric acid, which can be added in amounts of 1 to 100 mol% with respect to the aluminum content of the reaction mixture, for example sodium carbonate can be added to the reaction mixture.
  • Crystalline aluminum hydroxide is used as the aluminum source, which is known, for example, under the name gibbsite, hydrargillite or bayerite.
  • the gibbsite obtained in the Bayer process is preferably used. It is not necessary to use aluminum in dissolved form, for example as an aluminate solution according to US Pat. No. 4,656,156 or in "active" form, for example as a gel according to DE-C-33 06 822.
  • temperatures in the A range between about 100 and about 240 ° C and reaction times between about 10 and about 240 minutes are required.
  • alkali metal hydroxide it is necessary to add a catalytically effective amount of alkali metal hydroxide to the aqueous mixture before heating to the reaction temperature.
  • the required amount of alkali metal hydroxide is about 1 to about 20 mol% based on aluminum hydroxide, preferably about 2 to about 10 mol%.
  • sodium hydroxide is preferably used as the alkali metal hydroxide, but potassium hydroxide would also be used, for example.
  • the amount of alkali metal hydroxide added is reduced below the lower limit according to the invention, the aluminum hydroxide is only reacted incompletely with the source of divalent metal ions to form the cationic layer compound. Amounts of alkali metal hydroxide beyond the upper limit according to the invention are not harmful to the course of the reaction, but have a disadvantageous effect on the stabilizing properties of the powder obtainable after the reaction mixture has dried.
  • the cationic layer compound formed under these conditions is obtained in powder form by drying without prior separation of the solid from the water phase. Since the complicated process step of filtering or centrifuging is not necessary as a result, this process is particularly economical.
  • the alkali metal ions used remain here in the end product, without the stabilizing effect against the thermal degradation of halogen-containing plastics being adversely affected thereby.
  • the form in which the alkali metal ions are present in the end product depends on the amount used, the reaction conditions and the type of drying.
  • the alkali metal ions can be present in the powdery end product as a hydroxide, as a salt with the anion A n ", for example as a carbonate, or as an alkali metal aluminate or as an alkali metal aluminum hydroxosalz. This is insignificant for the use according to the invention. It is also not important to rule out that the alkali metal ions are incorporated into the cationic layer compound.
  • Cationic layer compounds which are produced by this process have a specific surface area according to BET (measured with nitrogen) of above approximately 10 m 2 / g, preferably between 50 and 200 m 2 / g.
  • specific surface area according to BET corresponds to the definition in Römpp's Chemie Lexikon, Volume 1, 8th edition, 1979, page 423.
  • the smaller BET surface areas are, for example, in the range between approximately 10 and approximately 50 m 2 / g, to be preferred if no further organic additives have been added to the reaction mixture.
  • the BET surface area of the powders obtained is above about 50 m 2 / g. This is related to the dispersing properties of the powders obtained in the PVC matrix: If these powders do not contain an organic additive with a dispersing action, it is preferable if the powder consists of well-formed and little adhering individual crystals. In this case, the specific surface area is clearly below 50 m 2 / g. Because of her in principle, better absorption capacity for the hydrogen chloride split off during the decomposition of PVC, however, powders with a specific surface area above 50 m 2 are preferred.
  • Such fine-particle powders consist of microcrystals which have a strong tendency to form aggregates and which do not disperse sufficiently homogeneously in the PVC matrix.
  • the tendency to aggregate can be reduced and thus the dispersibility in PVC can be improved if one or more of the additives described below are added to the reaction mixture at the latest before drying to a powder, but preferably before heating to the reaction temperature. Due to the improved dispersion in the PVC matrix, an increased active surface is available for binding hydrogen chloride.
  • temperatures in the upper third of the temperature range according to the invention are preferred in the production of the cationic layer compounds in order to produce products with a specific surface to get below about 50 m 2 / g. If the reaction is carried out in the presence of such organic additives or if the reaction mixture is added before the reaction mixture is dried, the temperature during the production should be below about 185 ° C. in order to produce products with a specific surface area above about 50 to get m / g.
  • the invention comprises agents for stabilizing halogen-containing plastics, which additionally contain a total of about 0.5 to about 15% by weight, based on the cationic layer compound, of one or more additives selected from the following groups:
  • Additives of group A) are polyols with at least two hydroxyl groups and a total of 3 to 30 carbon atoms.
  • examples of such polyols are diols with 3 to 30 carbon atoms, such as butanediols, hexanediols, dodecanediols, and polyols such as trimethylolpropane, pentaerythritol, glycerol and their technical oligomer mixtures with average degrees of condensation from 2 to 10.
  • Polyols are very particularly preferred with 3 to 30 carbon atoms which carry all 3 carbon atoms at least one hydroxyl group or an ether oxygen, preferably glycerol and / or the technical oligoglycerol mixtures with average degrees of condensation from 2 to 10.
  • this is also the "THEIC” known tris (2-hydroxyethyl) isocyanurate (EP-B-377 428) suitable.
  • the additives of group B) are esters of partially or completely epoxidized unsaturated carboxylic acids with 6 to 22 carbon atoms.
  • Suitable esters are esters of mono-, di- and / or trihydric alcohols which are completely epoxidized unsaturated carboxylic acids with 6 to 22 carbon atoms are esterified, such as methyl, 2-ethylhexyl, ethylene glycol, butanediol, neopentylglycol, glycerol and / or trimethylolpropane esters of epoxidized lauric acid, palmitoleic acid, oleic acid, ricinoleic acid, linoleic acid and / or linolenic acid.
  • Esters of trihydric alcohols and fully epoxidized unsaturated carboxylic acids with 12 to 22 carbon atoms are preferred, and in particular esters of glycerol with fully epoxidized unsaturated carboxylic acids with 12 to 22 carbon atoms.
  • the carboxylic acid component can be derived, for example, from palmitoleic acid, oleic acid, elaidic acid, petroselinic acid, ricinoleic acid, linolenic acid, gadoleic acid or erucic acid.
  • the unsaturated carboxylic acids are epoxidized by known methods.
  • the epoxidized carboxylic acid glycerides can also be technical mixtures such as those obtained by epoxidation of natural unsaturated fats and oils.
  • Epoxidized beet oil, epoxidized unsaturated soybean oil and / or epoxidized sunflower oil of new breed is preferably used.
  • the additives in group C) are full or partial esters which are obtained by the relevant methods of preparative organic chemistry, for example by acid-catalyzed reaction of polyols with carboxylic acids.
  • Suitable polyol components are those which have already been discussed in group A).
  • Aliphatic, saturated and / or unsaturated carboxylic acids having 6 to 22 carbon atoms such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid or behenic acid, behenic acid, are preferred as the acid component.
  • the carboxylic acid component can also be a technical mixture, as is the case with the pressure splitting of natural ones Greasing and oiling occurs.
  • Partial esters of glycerol and in particular of its technical oligoglycerol mixtures with average degrees of condensation of 2 to 10 and saturated and / or unsaturated aliphatic carboxylic acids with 6 to 22 carbon atoms are preferred.
  • Additives in group D) can be alkyl and aryl phosphites, preferably those of the general formula II
  • R 1, R 2 and R 3 independently of one another represent an alkyl radical having 1 to 18 carbon atoms or a phenyl radical.
  • Typical examples of additives of group D) are tributyl phosphite, triphenyl phosphite, dimethylphenyl phosphite and / or dimethyl stearyl phosphite. Diphenyldecylphosphite is preferred.
  • Additives of group E) are anions of saturated or mono- or polyunsaturated fatty acids with 6 to 22 carbon atoms, which can be linear or branched. Linear fatty acids are preferred because of their easier availability. Pure fatty acids such as, for example, lauric acid, myristic acid, palmitic acid, stearic acid, lauroleic acid, myristoleic acid, palmitoleic acid, oleic acid, linoleic acid or linolenic acid are suitable. However, it is also economically attractive to use fatty acid mixtures such as are obtainable from the splitting of natural oils and fats.
  • fatty acids are used as such or as - preferably water-soluble - salts, for example as sodium or potassium salts. Since the reaction mixture is strongly alkaline, it will Reaction product which in any case contain fatty acids in the form of their anions.
  • Additives of group F are polymers soluble in water with pH values above 8, preferably with pH values from 9 to 12, which have an average (number average) molecular weight of 500 to 50,000.
  • soluble means that the polymeric additives are more than 0.01% by weight in an aqueous solution at pH 10, adjusted with alkali metal hydroxides at 20 ° C., preferably at least 0.1% by weight. -% and especially under the specified conditions are completely clear.
  • all polymers can be used as polymeric additives which the person skilled in the art uses as pigment dispersants (see Kirk-Othmer "Encyclopedia of Chemical Technology", Vol.
  • Preferred polymeric additives are acrylic acid and methacrylic acid homo- and copolymers, lignin sulfonates and trimer fatty acids.
  • polymeric additives selected from the group consisting of polymers of acrylic acid and methacrylic acid and their copolymers with unsaturated monomers containing sulfonic acid groups, unsaturated monomers containing phosphonic acid groups, unsaturated aliphatic carboxylic acids with 3 to 5 carbon atoms, amides of unsaturated aliphatic carboxylic acids with 3 to 5 carbon atoms.
  • polyacrylic acid polymethacrylic acid - in the following, acrylic acid and methacrylic acid and their derivatives are simplified as (meth) acrylic acid or derivatives abbreviated - and / or their salts such as polysodium (meth) acrylate, copolymers of (meth) acrylic acid with maleic acid, maleic anhydride, styrene sulfonic acid, oc-methylstyrene, 2-vinylpyridine, 1-vinylimidazole, dimethylaminopropyl (meth) acrylamide, 2- (meth) acrylamido-2-methylpropanesulfonic acid, (meth) acrylamide, N-hydroxydimethyl (metha) acrylamide and / or their salts.
  • acrylic acid and methacrylic acid and their derivatives are simplified as (meth) acrylic acid or derivatives abbreviated - and / or their salts such as polysodium (meth) acrylate, copolymers of (
  • polymeric additives are those which have a predominantly anionic character, that is to say which mostly carry acid groups free or in the form of their salts.
  • Polymers of (meth) acrylic acid and their copolymers with styrene, alkylstyrenes having 1 to 4 carbon atoms in the alkyl radical, styrene sulfonic acid, maleic acid and / or their salts, in particular their sodium salts and maleic anhydride are particularly preferred.
  • the polymeric additives expediently have a molecular weight of 1000 to 10000.
  • the polymeric additives can be prepared by known processes such as bulk or solvent polymerization (see Ullmann's Encyclopedia of Industrial Chemistry, Volume 19, 4th Edition, pages 2-11, 1980).
  • the present invention further provides a process for the preparation of cationic layer compounds of the general formula (I) [M (") ⁇ Al (0H) y ] (An) z . MH 2 0 (I)
  • an aqueous mixture of at least one source of divalent metal ions M ( 11 ), a source of the anions A n "and crystalline aluminum hydroxide with 1 to 20 mol%, based on aluminum hydroxide, alkali metal hydroxide is mixed for one time is between 10 and 240 minutes to a temperature Tempe ⁇ heated between 100 and 240 C and ⁇ without Abtren ⁇ the solid dried from the water phase to a powder dried.
  • the manufacturing process can be carried out in batches. However, it is particularly attractive to carry out the production continuously, for example in a tubular reactor.
  • the flow rates are to be chosen so that the reaction times according to the invention are observed.
  • the aqueous product slurry can be dried directly after leaving the pressure reactor or after intermediate storage, preferably by spray drying. Directly or indirectly heated air, a heated inert gas such as nitrogen or superheated steam can be used as the drying gas.
  • the drying is expediently carried out at temperatures which do not exceed the boiling point of additives A) to F) by more than 10 ° C., in particular not at all.
  • additional dewatering by means of post-drying which is advantageously carried out at temperatures between 110 ° C. to 280 ° C., for example in a drying cabinet, leads to improved cationic layer compounds according to the invention.
  • the cationic layer compounds obtained after the preparation can then be selected with at least one liquid or low-melting, dispersing additive selected from groups A) to F) by intensive mixing at room temperature (15 to 25 ° C.) or a temperature below that Decomposition temperatures of the cationic layer compounds and / or the additives, preferably below 300 ° C., are modified.
  • the term low-melting additives is understood to mean additives which can be converted into the liquid state at the above-mentioned decomposition temperatures at normal pressure.
  • the cationic layer compounds obtained after production can then be ground with one or more additives selected from groups A) to F) in the presence of polar organic solvents or water, preferably with grinding media mills and in particular with a ball mill, dried and optionally dried.
  • polar organic solvents is understood to mean hydrocarbon compounds which are liquid at room temperature (15 to 25 ° C.) and carry at least one more electronegative substituent than carbon. These include chlorinated hydrocarbons, alcohols, ketones, esters, ethers and / or glycol ethers.
  • Suitable polar organic solvents are methanol, ethanol, n-butanol, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanol, isophorone, ethyl acetate, lactic acid ethyl ester, 2-methoxyethyl acetate, tetrahydrofuran, Ethyl glycol monomethyl ether, diethylene glycol monoethyl ether.
  • the modification with the organic additives takes place additive amounts of between approximately 5 and approximately 100% by weight, based on the cationic layer compound.
  • Another object of the present invention is the use of cationic layered compounds of the type described as co-stabilizers for halogen-containing plastics stabilized with calcium and / or zinc salts of carboxylic acids having 6 to 22 carbon atoms.
  • the cationic layered compounds according to the invention are preferably used as co-stabilizers in halogen-containing plastics and in particular in PVC.
  • the cationic layer compounds without taking into account the proportion of the organic additives which may be present - in amounts of 0.01 to 5, preferably 0.1 to 3 parts by weight, based on 100 parts by weight of synthetic resins, are added.
  • the plastics are mechanically mixed with the plastics in granular form before the deformation is carried out, for example in the calender and extrusion process.
  • the commercially available zinc and / or calcium salts of carboxylic acids having 6 to 22 carbon atoms are usually mixed in as the usual stabilizers at the same time as the cationic layer compounds.
  • other conventional additives such as the heat stabilizers described in European application EP-A-189 899, can also be used.
  • the amounts of the stabilizers and co-stabilizers among one another can vary as required, with the proviso that the total stabilizer addition is within the amount of 0.5 to 5 parts by weight, based on 100 parts by weight of synthetic resins.
  • the minimum amount of cationic layer connection is accordingly at least 0.01% by weight.
  • the use of the cationic layer compounds according to the invention improves the effect of zinc and / or calcium soaps in stabilizing the halogen-containing plastics.
  • the cationic layered compounds according to the invention can be incorporated in the halogen-containing plastics as co-stabilizers, without adversely affecting the rheology of the plastics.
  • Example 1 The suspension according to Example 1 is mixed with 12 g glycerol in a storage container and metered into a prepared tubular reactor heated to 140 ° C. by means of a pump with a pre-pressure> 6 bar. The flow rate was chosen so that the average residence time was 40 minutes. The product was spray dried directly. A prepared X-ray diffraction diagram and analytical tests confirm the identity of the resulting hydrotalcite with the approximate composition [Mg6Al2 (0H) ⁇ 6] C03 * 4H20. BET surface area: 85 m 2 / g.
  • the suspension corresponding to Example 1 is mixed with 15 g of pentaglycerol with an average degree of condensation of 5, an average molecular weight of 380 and a hydroxyl number of about 1012 in a storage container and heated to a prepared and 140 ° C. by means of a pump with a pre-pressure> 6 bar Tube reactor metered. The flow rate was chosen so that the average residence time was 40 minutes. The product was spray dried directly.
  • a prepared X-ray diffraction diagram and analytical investigations confirm the identity of the resulting hydrotalcite with the approximate composition [Mg 6 Al2 (0H) 16 ] CO 3 * 4H20. BET surface area: 90 m / g.
  • Example 11 The suspension according to Example 1 is added and kosfettTalkremonoester via a pump with an inlet pressure> 6 bar metered into a Georgiarei ⁇ ended and 140 ° C heated tubular reactor container in a Medicarebe ⁇ with 25 g of diglycerol Ci2 / i8 -K °. The flow rate was chosen so that the average residence time was 40 minutes. The product was spray dried directly. A prepared X-ray diffraction diagram as well as analytical examinations confirm the identity of the resulting hydrotalcite with the approximate composition [MgöAl2 (OH) i6] C ⁇ 3 * 4H2 ⁇ . BET surface area: 80 m 2 / g.
  • the suspension corresponding to Example 1 is mixed with 5 g of sodium stearate in a storage container and metered into a prepared tube reactor heated to 140 ° C. by means of a pump with a pre-pressure> 6 bar. The flow rate was chosen so that the average residence time was 40 minutes. The product was spray dried directly.
  • a prepared X-ray diffraction diagram as well as analytical investigations confirm the identity of the resulting hydrotalcite of the approximate composition [Mg 6 Al2 (0H) 16 ] C03 * 4H20.
  • BET surface area 75 m 2 / g.
  • the suspension according to Example 1 is in a storage container with 20 g of a copolymer of 46 wt .-% styrene, 23 wt .-% ⁇ -methylstyrene and 31 wt .-% acrylic acid with a molecular weight (weight average) of 6000 added and metered in via a pump with a pre-pressure> 6 bar into a prepared tube reactor heated to 140 ° C. The flow rate was chosen so that the average residence time was 40 minutes. The product was spray dried directly.
  • a prepared X-ray diffraction diagram and analytical investigations confirm the identity of the resulting hydrotalcite of the approximate composition [MgeAl2 (OH) i6] CO 3 * 4 H2O. BET surface area: 85 m 2 / g.
  • the suspension according to Example 1 is in a storage container with 15 g of a copoly er made from 95% by weight methyl acrylate and 5 % By weight of dimethylaminopropyl methacrylamide with a molecular weight (weight average) of 5,000 and metered in via a pump with a pre-pressure> 6 bar into a prepared tube reactor heated to 140 ° C. The flow rate was chosen so that the average residence time was 40 minutes. The product was spray dried directly.
  • a prepared X-ray diffraction diagram as well as analytical investigations confirm the identity of the resulting hydrotalcite with the approximate composition [MgöAl (OH) 1 6] C ⁇ 3 * 4H2 ⁇ . BET surface area: 85 m / g.
  • 35 g of aluminum hydroxide (58.3% Al 2 O 3) are added to a suspension consisting of 27 g of magnesium oxide and 61 g of magnesium hydroxide carbonate in 500 ml of water. In this case, sodium hydroxide solution was not added. There is no thick step.
  • the reaction mixture is filled into an autoclave and heated to 180 ° C. An internal pressure of 12 bar builds up. After a reaction time of two hours, the pressure is released and the mixture is cooled. The reaction mixture is spray dried.
  • An X-ray diffraction diagram shows the minimal formation of hydrotalcite in addition to unreacted starting products such as hydrargillite, magnesium hydroxide carbonate and magnesium hydroxide.
  • 35 g of aluminum hydroxide (58.3% Al 2 O 3) are added to a suspension consisting of 27 g of magnesium oxide and 61 g of magnesium hydroxide carbonate in 500 ml of water.
  • 12.3 g of sodium stearate (10th mol% based on AI) added. There is no thick step.
  • the reaction mixture is filled into an autoclave and heated to 180 ° C. An internal pressure of 12 bar builds up. After a reaction time of two hours, the pressure is released and the mixture is cooled. The reaction mixture is spray dried.
  • a prepared X-ray diffraction diagram shows the minimal formation of hydrotalcite in addition to unreacted starting products such as hydrargillite, magnesium hydroxide carbonate and magnesium hydroxide.
  • polyvinyl chloride molding compositions containing stabilizer were processed on a laboratory roller mill measuring 450 ⁇ 220 mm (from Berstorff) at a roller temperature of 170 ° C. and a roller speed of 12.5 rpm in synchronism to test skins.
  • the approx. 0.5 m thick skins were cut into square specimens with an edge length of 10 mm, which were then exposed to a temperature of 180 ° C in a drying cabinet with six rotating trays (Heraeus FT 420 R). The samples were removed at intervals of 15 minutes and their change in color was assessed.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne un agent ayant la propriété de stabiliser des matières plastiques à teneur en halogène contre la dégradation thermique et photochimique, et contenant des composés cationiques à structure en couche correspondant à la formule (I) [M(II)xAl(OH)y](An-)z.mH2O. L'agent est caractérisé par le fait qu'il est le produit d'une réaction entre un mélange aqueux d'au moins une source d'ions métal bivalents (M(II)), une source d'anions (An-) et un hydroxyde d'aluminium cristallin ayant un pourcentage molaire d'hydroxyde de métal alcalin compris entre 1 et 20. Ce mélange est porté pendant 10 à 240 minutes à une température comprise entre 100 et 240 °C et transformé en poudre par séchage, sans séparation des solides de la phase aqueuse.
EP96908052A 1995-03-25 1996-03-15 Composes cationiques a structure en couche, leur production et leur application Withdrawn EP0817811A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19511016 1995-03-25
DE19511016A DE19511016A1 (de) 1995-03-25 1995-03-25 Kationische Schichtverbindungen, deren Herstellung und deren Verwendung als PVC-Stabilisatoren
PCT/EP1996/001136 WO1996030440A1 (fr) 1995-03-25 1996-03-15 Composes cationiques a structure en couche, leur production et leur application

Publications (1)

Publication Number Publication Date
EP0817811A1 true EP0817811A1 (fr) 1998-01-14

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EP96908052A Withdrawn EP0817811A1 (fr) 1995-03-25 1996-03-15 Composes cationiques a structure en couche, leur production et leur application

Country Status (5)

Country Link
US (1) US6261530B1 (fr)
EP (1) EP0817811A1 (fr)
JP (1) JPH11502878A (fr)
DE (1) DE19511016A1 (fr)
WO (1) WO1996030440A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753758A1 (de) * 1997-12-04 1999-06-10 Henkel Kgaa Verfahren zur Herstellung kationischer Schichtverbindungen
US6376405B1 (en) 1998-02-11 2002-04-23 Akzo Nobel N.V. Process for producing anionic clay using two types of alumina compounds
US6333290B1 (en) * 1998-02-11 2001-12-25 Akzo Nobel Nv Process for producing anionic clays using magnesium acetate
US6440887B1 (en) 1998-02-11 2002-08-27 Akzo Nobel Nv Continuous process for producing anionic clay
EP1358129B1 (fr) 2001-02-09 2017-10-11 Albemarle Netherlands B.V. Procede de preparation d'argiles anioniques dopees
DE10124734A1 (de) * 2001-05-21 2002-12-05 Baerlocher Gmbh Fein verteilte Stabilisatorzusammensetzung für halogenhaltige Polymere
US7993623B2 (en) * 2007-06-29 2011-08-09 Albemarle Netherlands B.V. Additives for removal of metals poisonous to catalysts during fluidized catalytic cracking of hydrocarbons
KR100775602B1 (ko) * 2006-10-24 2007-11-15 신원화학 주식회사 하이드로탈사이트의 제조방법
CN101668702A (zh) * 2007-04-26 2010-03-10 东亚合成株式会社 水滑石化合物及其制造方法、无机离子捕捉剂、组合物、电子部件密封用树脂组合物
US20120298912A1 (en) * 2010-02-09 2012-11-29 Yasuharu Ono Spherical hydrotalcite compound and resin composition for sealing electronic component
JP5435494B2 (ja) * 2010-07-12 2014-03-05 協和化学工業株式会社 増粘剤

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US3539306A (en) * 1966-07-25 1970-11-10 Kyowa Chem Ind Co Ltd Process for the preparation of hydrotalcite
US3796792A (en) 1969-12-12 1974-03-12 Kyowa Chem Ind Co Ltd Composite metal hydroxides
GB1598375A (en) 1978-02-17 1981-09-16 Anphar Sa Aluminium magnesium carbonate
GB2075989B (en) 1980-05-13 1984-04-26 Kyowa Chem Ind Co Ltd Stabilized thermoplastic resin compositions
DE3306822C2 (de) * 1983-02-26 1985-01-03 Giulini Chemie Gmbh, 6700 Ludwigshafen Kristallines, basisches Aluminium-Magnesium-Carbonat
JPS61174270A (ja) 1985-01-29 1986-08-05 Kyowa Chem Ind Co Ltd 耐発錆性ないし耐着色性賦与剤
US4656156A (en) 1986-01-21 1987-04-07 Aluminum Company Of America Adsorbent and substrate products and method of producing same
AT391474B (de) 1988-12-19 1990-10-10 Chemson Polymer Additive Verarbeitungszusatz fuer halogenhaltige polymere
DE4018628A1 (de) * 1990-06-11 1991-12-12 Henkel Kgaa Koagulationsmittel auf der basis von doppelschichthydroxid-verbindungen
DE4031818A1 (de) 1990-10-08 1992-04-09 Henkel Kgaa Kationische schichtverbindungen
DE4117034A1 (de) 1991-05-24 1992-11-26 Henkel Kgaa Kationische schichtverbindungen modifiziert mit polymeren
DE4117035A1 (de) * 1991-05-24 1992-11-26 Henkel Kgaa Kationische, modifizierte schichtverbindungen
WO1993022237A1 (fr) 1992-04-30 1993-11-11 J.M. Huber Corporation Procede de production d'hydrotalcite synthetique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9630440A1 *

Also Published As

Publication number Publication date
JPH11502878A (ja) 1999-03-09
WO1996030440A1 (fr) 1996-10-03
DE19511016A1 (de) 1996-09-26
US6261530B1 (en) 2001-07-17

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