GB2044776A - A preservative for plastics dispersions of use in the food industry - Google Patents
A preservative for plastics dispersions of use in the food industry Download PDFInfo
- Publication number
- GB2044776A GB2044776A GB8005607A GB8005607A GB2044776A GB 2044776 A GB2044776 A GB 2044776A GB 8005607 A GB8005607 A GB 8005607A GB 8005607 A GB8005607 A GB 8005607A GB 2044776 A GB2044776 A GB 2044776A
- Authority
- GB
- United Kingdom
- Prior art keywords
- food industry
- preservative
- paper
- formaldehyde
- plastics
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/34—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the groups, e.g. biuret; Thio analogues thereof; Urea-aldehyde condensation products
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Dentistry (AREA)
- Polymers & Plastics (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Nutrition Science (AREA)
- Organic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Plant Pathology (AREA)
- Food Science & Technology (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Paper (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
An aqueous solution containing 2-methyl-3-oxo-5-chlorothiazoline- 1,2, dimethylol urea, and an adduct of formaldehyde and an aliphatic glycol or a monoalkyl ether thereof as described in Patent Specification No. GB 2011790A is of use for preserving plastics dispersions used in the food industry.
Description
SPECIFICATION
A preservative for plastics dispersions of use in the food industry
The present invention relates to the further development of the germicidal agents de scribe in Patent Application No. 7900791, published as Specification No. 2011790.
The germicidal agents described in Patent
Application No. 7900791 are preferably used for technical and industrial purposes, and are characterised in that they contain, in aqueous solution, an amount of 16 to 28.5% of dimethylol urea, 40 to 72% of one or more adducts of 2 moles of formaldehyde and an aliphatic glycol containing 2 to 8 carbon atoms and/or a monoalkyl ether of such a glycol with 1 to 6 C atoms in the ether radical, as well as 0.1 to 5% by weight bf 2methyl-3-oxo-5-chloro-thiazoline (1, 2).
Paper or uncoated plastics foil are no longer used as packaging for foodstuffs, and instead for preference coated papers and coated foil are used in ever-increasing amounts. By coating the substrate with certain selected plastics dispersions, properties can be imparted to the substrate which are not exhibited by the said substrate itself and which are very desirable from the point of view of packaging technology and storability of the products. Examples of such desirable properties are greaseproof behaviour, moisture permeability or impermeability, and aroma protection.
Paper, paperboard, cardboard or plastics foil are generally used as packaging material and are coated with plastics dispersions in order to impart thereto a surface that is as far as possible smooth, nonabsorbent, impermeable to grease and, depending on the nature of the packaged goods, permeable or impermeable to moisture and/or permeable or impermeable to gases. The plastics dispersions used for the coating generally contain kaolin as filler and polymer mixtures or copolymers as film-forming constituents. These dispersions are subject to microbial attack on account of the existing water content when the manufactured packaging is stored in either the filled and unfilled state. Such attack must be prevented by adding preservatives.The addition of preservative must not alter the appearance, stability, permeability or impermeability as well as other physical and chemical properties of the dispersion. In addition, tne preservatives must as far as possible not be transferred to the foodstuffs once they heove been packed.
If migration does occur, this is permitted only in very small amounts for the toxicologically harmless constituents.
It is obvious that the afore-mentioned requirements are not met, or cannot be sufficiently met, by the majority of industrial preservatives when used in the food industry, since it frequently happens that either the properties of the plastics dispersion are affected or migration of certain constituents of the preservatives into the packaged goods occurs, or the germicidal effectiveness is reduced to such an extent by incorporation into the plastics dispersion that microbial attack can no longer be excluded during prolonged storage.
In accordance with the invention, it is now proposed to employ a preservative containing, in aqueous solution, 80 to 95% of a mixture of 20 to 30% of dimethylol urea, 50 to 75% of one or more adducts of 2 moles of formaldehyde and a aliphatic glycol with 2 to 8 C atoms and/or a monoalkyl ether of such a glycol with 1 to 6 C atoms in the ether radical as well as 0.1 to 5.0% of 2-methyl-3-oxo-5 chlorothiazoline-1 ,2 in order to preserve plastics dispersions for use in the food industry.
It was surprisingly found that the preservatives according to the invention satisfy to a very high degree the afore-mentioned requirements relating to these products, and moreover have an excellent germicidal activity.
Corresponding to the requirements placed on all products that come into contact with foodstuffs and can migrate into the latter, the subacute toxicity of the product was tested.
For this investigation a preservative according to the invention was applied orally for 13 weeks to 160 Wistar strain rats arranged in three groups, the rats of group 1 being given a dosage of 5 I/kg, the rats of group 2 a dosage of 25 I/kg and the rats of group 3 being given a dosage of 125 I/kg for 6 weeks and, starting from the 7th week to the end of the experiment, a continuously increasing dosage of up to 400 I/kg. The animals of groups 1 and 2 showed no deviations from normal values as regards body weight, growth parameters, blood and urine investigations, organ weights, as well as macropathological findings, whereas with increasing dosages in the case of the animals of group 3 clear toxicity symptons were observed, namely an increase in mortality to 7.5%, reduction in body weight, increase in weights of individual organs in some animals, as well as changes in the blood picture.However, in conclusion it can be said that the preservative according to the invention did not exhibit any toxic side effects when used in the normal dosages.
In addition, the allergic contact sensitisation properties of the preservative were tested in guinea-pigs by the method of Magnusson and
Kligman, J. Invest. Dermatol, 52, 268-276.
Under the conditions of this test it was found that the perservative according to the invention is free from sensitising properties.
The invention will be described in more detail hereinafter with the aid of examples:
Example 1
Preparation of coated foodstuff wrapping paper.
Normal foodstuff wrapping paper was coated with 20 g of paper coating composition per m2, using different plastics dispersions for this purpose. The paper denoted by the reference paper 1 b contained, per m2, 16 g of kaolin and 4 g of a polymer consisting of 48 per cent by weight of styrene, 48 per cent by wieght of butyl acrylate, 2.5 per cent by weight of acrylic acid and 1.5 per cent by weight of acrylamide; the paper denoted as paper 1 contained, in addition to the above, 0.0045 g per m2 of the product according to the invention with a content of 1.1 % of 2methyl-3-oxo-5-chloro-thiazoline (1, 2) and 92% of a mixture of 27% of dimethylol urea and 65% of an adduct of 2 moles of formaldehyde and ethylene glycol in aqueous solution.
The paper denoted as paper 2 b had, per m2, a coating of 16 g of kaolin and 4 g of a copolymer of 47.5 per cent by weight of styrene, 47.5 per cent by weight of Butalgen, 3 per cent by weight of methacrylamide and 2 per cent by weight of maleic acid; the paper denoted as paper 2 additionally contained 0.005 g per m2 of the preservative according to the invention with a content of 1.1 % of 2methyl-3-oxo-5-chloro-thiazoline (1, 2) and 92% of a mixture of 27% of dimethylol urea and 65% of an adduct of 2 moles of formaldehyde and ethylene glycol in aqueous solution.
In the coated papers prepared with an addition of the preservative according to the invention, no change in the chemical and physical properties was observed even after prolonged storage.
Example 2
Using papers produced corresponding to
Example 1 and with the addition of the preservative according to the invention, the migration of formaldehyde and 2-methyl-3-oxo-5chlorothiazolin (1, 2) and 2-methyl-3-oxo-thiazolin (1, 2) in water, 3% acetic acid and test grease HB 307 after 10 days' storage at 40"C was measured and compared with the papers that had not been treated with the preservative.
The formaldehyde determination in the test food was carried out by steam distillation of the test food followed by measurement of the formaldehyde in the distillate colorimetrically with 3-methyl-2-benzoth iazolinone-hydrazone and ferric chloride at 635 nm with a spectrophotometer.
The heterocyclic compounds in water as test food were determined by concentrating the water migrates on a rotary evaporator and adding methanolic phosphoric acid. The mixture of heterocyclic compounds that was liberated was extracted with dichloromethane and then determined by gas chromatography using a sulphur-selective flame photometer detector.
The heterocyclic compounds were determined in the aqueous simulant 3% acetic acid by concentrating the acetic acid migrates on a rotary evaporator and acidifying with methanolic phosphoric acid. The mixture of heterocyclic compounds that was liberated was extracted with dichloromethane and then measured by gas chromatography using a sulphurselective flame photometer detector.
When determining the heterocyclic compounds in the grease simulant HB 307,the HB 307 migrates were taken up in hexane and extracted with water. The water extracts were concentrated on a rotary evaporator and acidified with methanolic phosphoric acid. The mixture of heterocyclic compounds was extracted with dichloromethane and then determined by gas chromatography using a sulphur-selective flame photometer detector.
With the grease simulant HB 307, no migration of the active materials was found.
In water only the formaldehyde migrated, and in an amount of 0.0021 mg/dm2 in the case of paper 1, and 0.0010 mg/dm2 in the case of paper 2.
In the 3 per cent acetic acid water simulant, the migration of formaldehyde was 0.0076 mg/dm2 in the case of paper 1 and 0.0098 mg/dm2 in the case of paper 2, while the migration of the heterocyclic compounds in paper 1 was 0.00031 mg/dm2, and 0.00016 mg/dm2 in the case of paper 2.
The treated papers are thus ideally suited for use in the food industry.
Since 2-methyl-3-oxo-5-ch lorothiazoline- 1,2 is itself soluble in fat, since the formaldehyde adducts are themselves partly or wholly watersoluble, and since the formaldehyde adducts can decompose to liberate formaldehyde, it is surprising to find that the germicidal agents of the invention do not show appreciable migration of the component compounds during use in the food industry as preservatives for plastics dispersions. The observed migrations are exceptionally low and indicate and unexpected results.
Claims (3)
1. The use of a germidical agent according to any of claims 1 to 3 of Patent Specification 2011 790A for preserving plastics dispersions used in the food industry.
2. A packaging material for use in the food industry and comprising a substrate coated with a plastics film preserved in accordance with the use as defined in claim 1.
3. A packaged item intended for human consumption when packaged using packaging material in accordance with claim 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792906276 DE2906276A1 (en) | 1978-01-09 | 1979-02-19 | Polymer contg. preservative compsn. - for coating food wrapping material to obtain germicidal activity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2044776A true GB2044776A (en) | 1980-10-22 |
| GB2044776B GB2044776B (en) | 1983-04-20 |
Family
ID=6063279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8005607A Expired GB2044776B (en) | 1979-02-19 | 1980-02-19 | Preservative for plastics dispersions of use in the food industry |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS55147535A (en) |
| GB (1) | GB2044776B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984000877A1 (en) * | 1982-09-10 | 1984-03-15 | Freimut Riemer | Antimicrobial treatment process for food and fodder products |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004052878A1 (en) * | 2004-11-02 | 2006-05-04 | Schülke & Mayr GmbH | Isothiazolone-containing preservatives with improved stability |
| DE102004059041A1 (en) * | 2004-12-07 | 2006-06-08 | Schülke & Mayr GmbH | Use of a bactericide such as formaldehyde or formaldehyde releasing compound in a composition to combat Mycobacterium |
-
1980
- 1980-02-18 JP JP1893580A patent/JPS55147535A/en active Pending
- 1980-02-19 GB GB8005607A patent/GB2044776B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984000877A1 (en) * | 1982-09-10 | 1984-03-15 | Freimut Riemer | Antimicrobial treatment process for food and fodder products |
| TR22359A (en) * | 1982-09-10 | 1987-03-03 | Riemer Freimut | MATERIAL FOR ANTIMICROBIC TREATMENT OF FOOD AND FEED ITEMS |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55147535A (en) | 1980-11-17 |
| GB2044776B (en) | 1983-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19970219 |