DE2209138A1 - Light degradable thermoplastics compsn - contg disodium salt of 3',4',5',6'-tetraiodofluoresce in as sensitiser - Google Patents

Light degradable thermoplastics compsn - contg disodium salt of 3',4',5',6'-tetraiodofluoresce in as sensitiser

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Publication number
DE2209138A1
DE2209138A1 DE19722209138 DE2209138A DE2209138A1 DE 2209138 A1 DE2209138 A1 DE 2209138A1 DE 19722209138 DE19722209138 DE 19722209138 DE 2209138 A DE2209138 A DE 2209138A DE 2209138 A1 DE2209138 A1 DE 2209138A1
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DE
Germany
Prior art keywords
thermoplastic
light
disodium salt
sensitizer
degradation
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Pending
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DE19722209138
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German (de)
Inventor
Helmut Dr Barzynski
Dietrich Dr Saenger
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BASF SE
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BASF SE
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Application filed by BASF SE filed Critical BASF SE
Priority to DE19722209138 priority Critical patent/DE2209138A1/en
Publication of DE2209138A1 publication Critical patent/DE2209138A1/en
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/15Heterocyclic compounds having oxygen in the ring
    • C08K5/151Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
    • C08K5/1545Six-membered rings

Abstract

Light-degradation of thermoplastic, synthetic, org. high polymer moulding batches, used as opt. foamed packaging materials, mulch foils for gardening and agriculture, is promoted by incorporating 0.01 - 5 (0.1 - 2) wt.% of di-Na salt of 3',4',5',6'-tetrachloro-2,4,5,7-tetraiodo-fluorescein (I), as sensitiser. (I) are non-toxic and promote quicker rotting. Thermoplasts include polyaddn. and polycondensation polymers (e.g. polyethylene, polypropylene, and impact resistant polystyrene) opt. contg. usual additives.

Description

Thermoplastische Kunststoff-Formmassen, die unter Lichteinwirkung beschleunigt abbauen Die vorliegende Erfindung betrifft thermoplastische Kunststoff-Formmassen, die unter Lichteinwirkung beschleunigt abbauen, enthaltend (1) einen thermoplastischen, synthetischen, organischen hochpolymeren Stoff (Thermoplast) sowie (2) 0,01 bis 5 Gewichtsprozent - bezogen auf den Thermoplast - eines den Abbau des Thermoplasten unter Lichteinwirkung beschleunigenden Stoffes (Sensibilisator).Thermoplastic plastic molding compounds that are exposed to light accelerated degradation The present invention relates to thermoplastic molding compounds, which degrade more rapidly under the action of light, containing (1) a thermoplastic, synthetic, organic high polymer material (thermoplastic) and (2) 0.01 to 5 percent by weight - based on the thermoplastic - one of the degradation of the thermoplastic under the influence of light accelerating substance (sensitizer).

Formmassen dieser Art sind bekannt; sie enthalten als Thermopiaste im allgemeinen Polymerisate des Styrols, Äthylens oder Propylens, - also Massen-Kunststoffe, aus denen in großen Mengen Wegwerf-Produkte hergestellt werden, z.B. Verpackungen in Folien-oder anderer Form. Neben den Thermoplasten enthalten die Formmassen der in Rede stehenden Art noch Sensibilisatoren, d.h. Stoffe, die den Abbau des Thermoplasten unter Lichteinwirkung beschleunigen. Als solche Stoffe hat man z.B. Abkömmlinge des -Pyrons verwendet (französische Patentschrift 2 o60 667).Molding compositions of this type are known; they contain as thermopiaste In general, polymers of styrene, ethylene or propylene, i.e. bulk plastics, from which large quantities of disposable products are made, e.g. packaging in foil or other form. In addition to the thermoplastics, the molding compounds contain the The type in question still has sensitizers, i.e. substances that break down the thermoplastic accelerate when exposed to light. As such substances one has, for example, descendants des pyrons used (French patent 2 060 667).

Eigentliche Aufgabe der Sensibilisatoren ist es, die aus den Formmassen hergestellten Produkte umiweltf'reundlich zu machen in dem Sinne, daß diese nach Gebrauch möglichst schnell verrotten. Daneben müssen die Sensibilisatoren meist noch weitere Bedingungen erfüllen. Verlangt wird z.B., daß sie die sonstigen Eigenschaften der Formmassen nicht oder möglichst wenig nachteilig beeinflussen, etwa die Verarbeitbarkeit sowie die physikalischen und ehemischen Verhaltenswerte. Auch massen die Sensibilisatoren in vielen Fällen physiologisch unbedenklich sein (Lebensmittelverpakkungen!).The actual task of the sensitizers is to remove the molding compound made products environmentally friendly in the sense that they are after Use to rot as quickly as possible. In addition, the sensitizers usually have to still meet other conditions. It is required, for example, that they have the other properties the molding compounds do not, or as little as possible, have an adverse effect, such as processability as well as the physical and former behavioral values. Also mass the sensitizers in many cases be physiologically harmless (food packaging!).

Aufgabenstellung der vorliegenden Erfindung war es, für die eingangs definierten thermoplastischen Kunststoff-Formmassen einen Sensibilisator aufzuzeigen, der den bekannten überlegen ist.The task of the present invention was for the initially to show a sensitizer to defined thermoplastic molding compounds, which is superior to the known.

Es wurde gefunden, daß diese Aufgabe gelöst werden kann, wenn man als Sensibilisator ein bestimmtes Salz eines bestimmten Fluoresceinderivats einsetzt.It has been found that this problem can be achieved if one uses a specific salt of a specific fluorescein derivative as a sensitizer.

Gegenstand der vorliegenden Erfindung sind demzntsprechend thermoplastische Kunststoff-Formmassen, die unter Lichteinwirkung beschleunigt abbauen, enthaltend (1) einen thermoplastischen, synthetischen, organischen hochpolymeren Stoff (Thermoplast) sowie (2) 0,01 bis 5, vorzugsweise 0,1 bis 2, Gewichtsprozent - bezogen auf den Thermoplast - eines den Abbau des Thermoplasten unter Lichteinwirkung beschleunigenden Stoffes (Sensibilisator). Die erfindungsgemäßen Formmassen sind dadurch gekennzeichnet, daß sie als Sensibilisator das Dinatriumsalz des )',4',5',6'-Tetrachlor-2,4,5,7-tetrajod-fluoresceins enthalten.The present invention accordingly relates to thermoplastics Containing plastic molding compounds which degrade more rapidly under the action of light (1) a thermoplastic, synthetic, organic high polymer material (thermoplastic) and (2) 0.01 to 5, preferably 0.1 to 2, percent by weight - based on the Thermoplastic - one that accelerates the degradation of thermoplastics when exposed to light Substance (sensitizer). The molding compositions according to the invention are characterized in that that they use the disodium salt of) ', 4', 5 ', 6'-tetrachloro-2,4,5,7-tetraiodine-fluorescein as a sensitizer contain.

Anders ausgedrückt ist Gegenstand der vorliegenden Erfindung die Verwendung des Dinatriumsalzes des 3',4',5',6'-Tetrachlor-2,4,5,7-tetrajod-fluoresceins als Sensibilisator in thermoplastischen Kunststoff-Formmassen, die unter Lichteinwirkung beschleunigt abbauen und enthalten (1) einen thermoplastischen, synthetischen, organischen hochpolymeren Stoff (Thermoplast) sowie (2) 0,01 bis 5, vorzugsweise 0,1 bis 2, Gewichtsprozent - bezogen auf den Thermoplast - eines den Abbau des Thermoplasten unter Lichteinwirkung beschleunigenden Stoffes (Sensibilisator).In other words, the subject matter of the present invention is the use of the disodium salt of 3 ', 4', 5 ', 6'-tetrachloro-2,4,5,7-tetraiodine fluorescein as Sensitizer in thermoplastic molding compounds that are exposed to light accelerate degradation and contain (1) a thermoplastic, synthetic, organic high polymer material (thermoplastic) and (2) 0.01 to 5, preferably 0.1 to 2, Percentage by weight - based on the thermoplastic - one of the degradation of the thermoplastic under the influence of light accelerating substance (sensitizer).

Für den erfindungsgemäßen Zweck geeignete Thermoplaste sind die einschlägig üblichen Polymerisate, Polyaddate und Polykondensate.Thermoplastics suitable for the purpose according to the invention are relevant customary polymers, polyaddates and polycondensates.

Zu nennen sind beispielsweise Olefin-, Styrol- und Vinylchlorid-Polymerisate, Polylactame und Polyurethane sowie Polyester und Polyamide. Als bevorzugt geeignet haben sich erwiesen Homo- und Copolymerisate mit Äthylen, Propylen, Buten-(l), 4-Methylpenten-(1) oder Styrol als Stamm-Monomeren; - also auch schlagfest modifizierte Polystyrole bzw. Styrolpolymerisate. Eine Spitzenstellung in der Eignung nehmen ein Polyäthylen, Polypropylen und Polybuten-(l). Die zum erfindungsgemäßen Zweck geeigneten Thermoplaste sind in großer Vielfalt im Handel erhältlich, so daß sich nähere Aussagen zu ihnen erübrigen. Erwähnt sei lediglich, daß die Thermoplaste die einschlagig üblichen Hilfs- bzw. Zusatzstoffe enthalten können, z.B. Treibmittel zum Herstellen schaumförmiger Produkte, Gleitmittel, Pigmente, Farbstoffe usw. Enthalten die Thermoplaste auch Lichtstabilisatoren, so wirken diese im allgemeinen den Sensibilisatoren in gewissem Umfang entgegen.Examples include olefin, styrene and vinyl chloride polymers, Polylactams and polyurethanes as well as polyesters and polyamides. Suitable as preferred homo- and copolymers with ethylene, propylene, butene- (1), 4-methylpentene- (1) have been found or styrene as parent monomers; - also impact-resistant modified polystyrenes or styrene polymers. A top position in fitness take a polyethylene, Polypropylene and polybutene- (l). The thermoplastics suitable for the purpose according to the invention are available in a large variety in stores, so that there is no need to provide more detailed information about them. It should only be mentioned that the thermoplastics are the relevant usual auxiliary or May contain additives, e.g. propellants for the production of foam-shaped products, Lubricants, pigments, dyes, etc. Do the thermoplastics also contain light stabilizers, so these generally counteract the sensitizers to a certain extent.

Der erfindungsgemäß einzusetzende Sensibilisator ist das Dinatriumsalz des 3t,4',5l,6'-Tetrachlor-2,4,5,7-tetrajod-fluoresceins.The sensitizer to be used according to the invention is the disodium salt des 3t, 4 ', 5l, 6'-tetrachloro-2,4,5,7-tetraiodine fluorescein.

Dieser Stoff hat die Formel er ist bekannt und im Rahmen der Farbstoffchemie im Handel erhältlich.This substance has the formula it is known and is commercially available in the context of dye chemistry.

Das Herstellen der in Rede stehenden thermoplastischen Kunststoff-Formmassen aus den Komponenten kann in einfacher Weise erfolgen, so wie man Üblicherweise Additive in die betroffenen Thermoplaste -möglichst homogen - einarbeitet, z.B. durch Walzen oder Extrudieren.The production of the thermoplastic molding compounds in question from the components can be done in a simple manner, as is usually the case with additives incorporated into the thermoplastics concerned - as homogeneously as possible - e.g. by rolling or extrusion.

Auch das Verarbeiten der Formmassen zu Formteilen kann ohne weiteres mit den für die betroffenen Thermoplaste üblichen Vorrichtungen erfolgen.The processing of the molding compositions into molded parts can also be carried out without further ado with the usual devices for the thermoplastics concerned.

Die Formmassen wird man vor allem zum Herstellen solcher Produkte verwenden, die unter Lichteinwirkung schnell abbauen sollen. Dies sind in erster Linie für Verpackungszwecke bestimmte Produkte, wie Behältnisse und Folien aus geschäumten oder ungeschäumten Formmassen; - aber auch andere Produkte, z.B. Nulchfolien für gärtnerische und landwirtschaftliche Zwecke, kommen in Betracht.The molding compounds are mainly used to manufacture such products use, which should break down quickly when exposed to light. These are in the first place Line for packaging products, such as foamed containers and foils or unfoamed molding compounds; - but also other products, e.g. nulch films for horticultural and agricultural purposes come into consideration.

Beispiel 1 100 Gewichtsteile eines handelsüblichen Polyäthylens (Dichte: 0,952 g/cm5), das keine photoaktiven Additive enthält, wird mit 0,5 Gewichtsteilen des Dinatriumsalzes des 3',4',5',6'-Tetrachlor-2,4,5,7-tetrajod-fluoresceins homogen vermischt (Weldlng-Extruder; 2400C). Example 1 100 parts by weight of a commercially available polyethylene (density: 0.952 g / cm5), which does not contain any photoactive additives, is 0.5 parts by weight of the disodium salt of 3 ', 4', 5 ', 6'-tetrachloro-2,4,5,7-tetraiodine-fluorescein homogeneous mixed (Weldlng extruder; 2400C).

100/u dicke Folien aus dieser Formmasse bauen bei Lichteinwirkupg unter vergleichbaren Bedingungen etwa 5 mal so schnell ab wie ebensodicke Folien aus der gleichen, jedoch unsensibilisierten Formmasse.100 / u thick films from this molding compound build with exposure to light under comparable conditions about 5 times as fast as films of the same thickness from the same, but unsensitized molding compound.

Beispiel 2 100 Gewichtsteile eines handelsüblichen Polypropylens, das keine photoaktiven Additive enthält, wird mit 0,4 Gewichtsteilen des Dinatriumsalzes des 3t,4',5,6'-Tetrachlor-2,4,5,7-tetraJod- fluoresceins homogen vermischt (Buss-Ko-Kneter; 21000). Example 2 100 parts by weight of a commercially available polypropylene, which contains no photoactive additives, is 0.4 parts by weight of the disodium salt des 3t, 4 ', 5,6'-tetrachloro-2,4,5,7-tetraiodine fluorescein mixed homogeneously (Buss-Ko kneader; 21000).

200zu dicke Folien aus dieser Formmasse bauen bei Lichteinwirkung unter vergleichbaren Bedingungen etwa 3,5 mal So schnell ab wie ebensodicke Folien aus der gleichen, jedoch unsensibilisierten Formmasse.Films that are too thick from this molding compound build up when exposed to light under comparable conditions about 3.5 times as fast as films of the same thickness from the same, but unsensitized molding compound.

Beispiel 3 100 Gewichtsteile eines handelsüblichen Polystyrols (schlagzäher Typ, 4 % Kautschuk), das keine photoaktiven Additive enthält, wird mit 0,4 Gewichtsteilen des Dinatriumsalzes des )t,4,5,6t-Tetrachlor-2,4,5,7-tetrajod-fluoresceins homogen vermischt (ZSK-Extruder; 2200C) dicke dicke Folien aus dieser Formmasse bauen bei Lichteinwirkung unter vergleichbaren Bedingungen etwa 2,5 mal so schnell ab wie ebensodicke Folien aus der gleichen, jedoch unsensibilisierten Formmasse. Example 3 100 parts by weight of a commercially available polystyrene (impact resistant Type, 4% rubber), which does not contain photoactive additives, is 0.4 parts by weight of the disodium salt des) t, 4,5,6t-tetrachloro-2,4,5,7-tetraiodine fluorescein homogeneous mixed (ZSK extruder; 2200C) thick, thick foils made from this molding compound are used Exposure to light under comparable conditions decreases about 2.5 times as fast as equally thick films made from the same but unsensitized molding compound.

Claims (2)

PatentansprücheClaims 1. Thermoplastische Kunststoff-Formmassen, die unter Lichteinwirkung beschleunigt abbauen, enthaltend (1) einen thermoplastischen, synthetischen, organischen hochpolymeren Stoff (Thermoplast) sowie (2) 0,01 bis 5 Gewichtsprozent - bezogen auf den Thermoplast - eines den Abbau des Thermoplasten unter Lichteinwirkung beschleunigenden Stoffes (Sensibilisator), dadurch gekennzeichnet, daß die Formmassen als Sensibilisator das Dinatriumsalz des ),4,5t,6t-Tetrachlor-2,4,5,7-tetrajodfluoresceins enthalten.1. Thermoplastic plastic molding compounds that are exposed to light accelerated degradation, containing (1) a thermoplastic, synthetic, organic high polymer material (thermoplastic) and (2) 0.01 to 5 percent by weight - based on the thermoplastic - one that accelerates the degradation of the thermoplastic when exposed to light Substance (sensitizer), characterized in that the molding compounds act as a sensitizer contain the disodium salt des), 4,5t, 6t-tetrachloro-2,4,5,7-tetraiodofluoresceins. 2. Verwendung des Dinatriumsalzes des )t,4,5t,6s-Tetrachlor-2,4,5,7-tetrajod-fluoresceins als Sensibilisator in thermoplastischen Kunststoff-Formmassen, die unter Lichteinwirkung beschleunigt abbauen und enthalten (1) einen thermoplastischen, synthetischen, organischen hochpolymeren Stoff (Thermoplast) sowie (2) 0,01 bis 5 Gewichtsprozent - bezogen auf den Thermoplast - eines den Abbau des Thermoplasten unter Lichteinwirkung beschleunigenden Stoffes (Sensibilisator).2. Use of the disodium salt des) t, 4.5t, 6s-tetrachloro-2,4,5,7-tetraiodine fluorescein as a sensitizer in thermoplastic molding compounds that are exposed to light accelerate degradation and contain (1) a thermoplastic, synthetic, organic high polymer material (thermoplastic) and (2) 0.01 to 5 percent by weight - based on the thermoplastic - one that accelerates the degradation of the thermoplastic when exposed to light Substance (sensitizer).
DE19722209138 1972-02-26 1972-02-26 Light degradable thermoplastics compsn - contg disodium salt of 3',4',5',6'-tetraiodofluoresce in as sensitiser Pending DE2209138A1 (en)

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