DE2209254A1 - Light-degradable thermoplastics - contng azobenzene deriv as sensitiser to accelerate breakdown - Google Patents

Light-degradable thermoplastics - contng azobenzene deriv as sensitiser to accelerate breakdown

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Publication number
DE2209254A1
DE2209254A1 DE19722209254 DE2209254A DE2209254A1 DE 2209254 A1 DE2209254 A1 DE 2209254A1 DE 19722209254 DE19722209254 DE 19722209254 DE 2209254 A DE2209254 A DE 2209254A DE 2209254 A1 DE2209254 A1 DE 2209254A1
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DE
Germany
Prior art keywords
thermoplastic
light
azobenzene
sensitiser
thermoplastics
Prior art date
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Pending
Application number
DE19722209254
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German (de)
Inventor
Helmut Dr Barzynski
Dietrich Dr Saenger
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BASF SE
Original Assignee
BASF SE
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Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to DE19722209254 priority Critical patent/DE2209254A1/en
Publication of DE2209254A1 publication Critical patent/DE2209254A1/en
Pending legal-status Critical Current

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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
    • C08K5/16Nitrogen-containing compounds
    • C08K5/32Compounds containing nitrogen bound to oxygen

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

The thermoplastics contain, as light sensitiser, 0.01-5wt.% 2,4-dinitro-6-bromo-21-acetylamino-41-(beta-hydroxyethyl beta-cyanethyl)-amino 51-methoxy azobenzene. Suitable thermoplastics are olefin, styrene and vinyl chloride polymers, polylactams, polyurethanes, polyesters and polyamides. The sensitiser causes rapid breakdown of the plastics e.g., in the form of disposable containers, packaging films, mulching film, etc., and is itself physiologically acceptable.

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 Thermoplaste im allgemeinen Polymerisate des Styrols, Ethylens oder Propylens, - also Massen-Kunststoffe, aus denen in großen Mengen Wegwerfprodukte 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.Molding compositions of this type are known; they contain as thermoplastics In general, polymers of styrene, ethylene or propylene, i.e. bulk plastics, from which disposable products are made in large quantities, e.g. B. Packaging in foil or other form. In addition to the thermoplastics, the molding compounds contain the the type in question nor sensitizers, d. H.

Stoffe, die den Abbau des Thermoplasten unter Lichteinwirkung beschleunigen. Als solche Stoffe hat man z. B. Abkömmlinge des g-Pyrons verwendet (französische Patentschrift 2 OÓO 667).Substances that accelerate the breakdown of thermoplastics when exposed to light. As such substances you have z. B. descendants of the g-pyron used (French Patent specification 2 00 O 667).

Eigentliche Aufgabe der Sensibilisatoren ist es, die aus den Formmassen hergestellten Produkte umweltfreundlich zu machen in dem Sinne, daß diese nach Gebrauch möglichst schnell verrotten.The actual task of the sensitizers is to remove the molding compound to make manufactured products environmentally friendly in the sense that they are after use rot as quickly as possible.

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 chemischen Verhaltenswerte. Auch müssen die Sensibilisatoren in vielen Fällen physiologisch unbedenklich sein (Lebensmittelverpackungen!).In addition, the sensitizers usually have to meet other conditions fulfill. Is required z. B. that they the other properties of the molding compounds not or as little as possible adversely affect, such as the processability as well the physical and chemical behavior values. Also need 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 defined thermoplastic molding compounds a sensitizer to show which is superior to the known.

Es wurde gefunden, daß diese Aufgabe gelöst werden kann, wenn man als Sensibilisator ein bestimmtes Azobenzolderivat einsetzt.It has been found that this problem can be achieved if one uses a certain azobenzene derivative as a sensitizer.

Gegenstand der vorliegenden Errindung sind dementsprechend 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).The present invention accordingly relates to thermoplastic materials 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 - a substance that accelerates the breakdown of thermoplastics when exposed to light (Sensitizer).

Die erfindungsgemäßen Formmassen sind dadurch gekennzeichnet, daß sie als Sensibilisator 2,4-Dinitro-6-brom-2'-acetylamino-4'-(ß-hydroxyäthyl, ß-cyanäthyl)-amino-58-methoxy-azobenzol enthalten.The molding compositions according to the invention are characterized in that they act as a sensitizer to 2,4-dinitro-6-bromo-2'-acetylamino-4 '- (ß-hydroxyethyl, ß-cyanoethyl) -amino-58-methoxy-azobenzene contain.

Anders ausgedrückt ist Gegenstand der vorliegenden Erfindung die Verwendung von 2,4-Dinitro-6-brom-2'-acetylamino-4'-(ßhydroxyäthyl, ß-cyanäthyl)-amino-5' -methoxy-azobenzol 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 2,4-dinitro-6-bromo-2'-acetylamino-4 '- (ß-hydroxyethyl, ß-cyanoethyl) -amino-5' -methoxy-azobenzene 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, preferably 0.1 to 2 percent by weight - based on the thermoplastic - one of the degradation of the thermoplastic under the action 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 PotuBthane sowie Polyester und Polyamide. Als bevorzugt geeignet haben sich erwiesen Homo- und Copolymerisate mit ethylen, 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 einschlägig üblichen Hilfs- bzw.Examples include olefin, styrene and vinyl chloride polymers, Polylactams and PotuBthane as well as polyesters and polyamides. Suitable as preferred have proven homo- and copolymers with ethylene, propylene, butene- (1), 4-methylpentene- (1) or styrene as parent monomers; - also impact-resistant modified polystyrenes or styrene polymers. A top position take in fitness a polyethylene, polypropylene and polybutene (l). - The purpose according to the invention suitable thermoplastics are commercially available in a large variety, so that more details about them are superfluous. It should only be mentioned that the thermoplastics the relevant usual auxiliary or

Zusatzstoffe enthalten können, z. B. Treibmittel zum Herstellen schaumförmiger Produkte, Gleitmittel, Pigmente, Farbstoffe usw.May contain additives, e.g. B. Propellants for producing foam-shaped Products, lubricants, pigments, dyes, etc.

Enthalten die Thermoplaste auch Lichtstabilisatoren, so wirken diese im allgemeinen den Sensibilisatoren in gewissem Umfang entgegen.If the thermoplastics also contain light stabilizers, these work generally opposed to the sensitizers to some extent.

Der erfindungsgemäß einzusetzende Sensibilisator ist 2,4-Dinitro-6-brom-2'-acetylamino-4'-(ß-cyanäthyl, ß-hydroxyäthyl)-amino-5tmethoxy-azobenzol.The sensitizer to be used according to the invention is 2,4-dinitro-6-bromo-2'-acetylamino-4 '- (ß-cyanoethyl, ß-hydroxyethyl) -amino-5-methoxy-azobenzene.

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 in the affected thermoplastics - as homogeneously as possible - incorporated, z. B. 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.The molding compounds are mainly used to manufacture such products use, which should break down quickly when exposed to light.

Dies sind in erster Linie für Verpackungszwecke bestimmte Produkte, wie Behältnisse und Folien aus geschäumten oder ungeschäumten Formmassen; - aber auch andere Produkte, z. B. Mulchfolien für gärtnerische und landwirtschaftliche Zwecke, kommen in Betracht.These are primarily products intended for packaging purposes, such as containers and foils made from foamed or non-foamed molding compounds; - but also other products, e.g. B. Mulch films for horticultural and agricultural Purposes, come into consideration.

Beispiel 1 100 Gewichtsteile eines handelsüblichen Polyäthylens (Dichte: 0,918 g/cm3), das keine photoaktiven Additive enthält, wird mit 1,2 Gewichtsteilen 2,4-Dinitro-6-brom-2'-acetylamino-4'-(ßhydroxyäthyl, ß-cyanäthyl) -amino-5 -me thoxy-azobenzol homogen vermischt (Welding-Extruder; 2400C). Example 1 100 parts by weight of a commercially available polyethylene (density: 0.918 g / cm3), which does not contain any photoactive additives, is 1.2 parts by weight 2,4-Dinitro-6-bromo-2'-acetylamino-4 '- (β-hydroxyethyl, β-cyanoethyl) -amino-5-methoxy-azobenzene homogeneously mixed (welding extruder; 2400C).

100 p dicke Folien aus dieser Formmasse bauen bei Lichteinwirkung unter vergleichbaren Bedingungen etwa 2,5mal so schnell ab wie ebensodicke Folien aus der gleichen, Jedoch unsensibilisierten Formmasse.100 μ thick films made of this molding compound build up when exposed to light under comparable conditions about 2.5 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 0,5 Gewichtsteilen 2,4-Dinitro-6-brom-2'acetylamino-4'(ß.hydroxyäthyl, ß-cyanäthyl)-amino-51 -methoxy-azobenzol homogen vermischt (Buss-Ko-Kneter; 2100C). Example 2 100 parts by weight of a commercially available polypropylene, contains no photoactive additives, with 0.5 parts by weight of 2,4-dinitro-6-bromo-2'acetylamino-4 '(ß.hydroxyäthyl, ß-cyanoethyl) -amino-51-methoxy-azobenzene mixed homogeneously (Buss-Ko kneader; 2100C).

100 p dicke Folien aus dieser Formmasse bauen bei Lichteinwirkung unter vergleichbaren Bedingungen etwa 2,5mal so schnell ab wie ebensodicke Folien aus der gleichen, Jedoch unsensibilisierten Formmasse.100 μ thick films made of this molding compound build up when exposed to light under comparable conditions about 2.5 times as fast as films of the same thickness from the same, but unsensitized molding compound.

Claims (2)

PatentansprücheClaims 1. Thermoplastische Kunststoff-Formmassens 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 2,4-Dinitro-6-brom-2'-acetylamino-4' (ß-hydroxyäthyl, ß-nyan-Sthyl)-amino-5'-methoxy-azobenzol enthalten.1. Thermoplastic plastic molding compounds 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 under the action of light Substance (sensitizer), characterized in that the molding compounds act as a sensitizer 2,4-Dinitro-6-bromo-2'-acetylamino-4 '(ß-hydroxyethyl, ß-nyan-ethyl) -amino-5'-methoxy-azobenzene contain. 2. Verwendung von 2, 4-Dinitro-6-brom-2 ? -acetylamino-4' -(ß-hydroxyäthyl, ß-cyanäthyl)-amino-5'-methoxy-azobenzol als Sensibili sator in thermoplastischen Kunststo-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 2,4-dinitro-6-bromo-2? -acetylamino-4 '- (ß-hydroxyethyl, ß-cyanoethyl) -amino-5'-methoxy-azobenzene as a sensitizer in thermoplastic Plastic molding compounds that degrade and contain more quickly when exposed to light (1) a thermoplastic, synthetic, organic high polymer material (thermoplastic) and (2) 0.01 to 5 percent by weight - based on the thermoplastic - of the degradation of the thermoplastic substance accelerating under the influence of light (sensitizer).
DE19722209254 1972-02-26 1972-02-26 Light-degradable thermoplastics - contng azobenzene deriv as sensitiser to accelerate breakdown Pending DE2209254A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111518297A (en) * 2020-04-01 2020-08-11 华东师范大学 Preparation method of visible light stimulus responsive polyacrylamide supramolecular film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111518297A (en) * 2020-04-01 2020-08-11 华东师范大学 Preparation method of visible light stimulus responsive polyacrylamide supramolecular film

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