Product Information PREVENTOL D 2

Transcription

1 Product Information PREVENTOL D 2 1/6

2 Uses For the preservation of aqueous coatings, polymer dispersions, filler suspensions, slurries, solutions and dispersions of adhesives and thickeners, concrete additives, metalworking fluids, cleaners and other aqueous formulations. Actice ingredient for manufacturing of disinfectants. Chemical and physical data Active ingredient: Product description: benzyl hemiformal (phenylmethoxymethanol) liquid Specification The specification parameters can be found in the currently valid product specification. Characteristic data* Density (20 C): approx g/cm 3 Viscosity (20 C): Viscosity (10 C): Vapour pressure (50 C): approx mpa s approx mpa s approx. 45 hpa Solidification point: < -60 C Boiling point: approx. 105 C Flash point: approx. 80 C (DIN 51758) Ignition temperature: approx. 400 C (DIN 51794) Solubility: water: approx. 25 g/l good solubility in organic solvents ph-value (1 % in water): approx. 5 (1%) Stability range: ph 3-12 *Characteristic data provide further information about the product and are not subject to constant monitoring. They are therefore not binding. 2/6

3 Storage If correctly stored and kept in the original sealed package the shelf life is at least 2 years. Technical benefits Broad spectrum of activity at low concentrations and therefore particularly economical. As Preventol D 2 is a low-viscosity, colourless liquid which has sufficient solubility in water (2.5 %) and solvents, it is easy to handle and meter. If adequately diluted (max. mg/l), waste water problems are minimized due to good biodegradability. Free of organically bound chlorine, therefore no effect on the AOX value. Application Preventol D 2 is a formaldehydereleasing compound which has a broad spectrum of activity against bacteria, mould fungi and yeasts (see table). It is a versatile preservative for many types of water-based products. To ensure that maximum antimicrobial efficacy is achieved with the lowest possible concentration, Preventol D 2 must be distributed homogeneously in the material to be preserved. The easiest way of doing this is to predissolve the preservative in the make-up water or in alcohol. If there is a need to add the preservative into finished product, effective stirring will be necessary to get the required distribution. Preventol D 2 at 20 C has a water solubility of 2.5 %. Post-treatment of high-viscosity products (e.g. pigment slurries) with Preventol D 2 in most cases is not recommendable. Preventol D 2 is particularly suitable for preserving aqueous coatings which have not been neutralized with ammonia, a substance which reduces the microbicidal effect of the preservative. By increasing the amount of Preventol D 2 this reduction in effect can be counterbalanced: 0.1 % Preventol D 2 is sufficient in the case of 0.1 % of a 25 % ammonia solution. It is best to adjust ph by adding a caustic soda solution. This eliminates the yellowing and unpleasant odour which results when ammonia is used. In contrast to phenolic preservatives, Preventol D 2 does not migrate into the disperse phase. When used in thickeners, it does not cause any additional thickening or gelling. Preventol D 2 should not be added to casein-based products containing more than 1.5 % casein. Electrophoresis baths provide a favourable medium for the growth of slime-forming bacteria and fungi. The results of such microbial activity are the development of an unpleasant odour, the blockage of filters and defects in the paint films. Trials under operational conditions have shown that Preventol D 2 is especially suitable for preventing slime formation in electrophoresis baths thus eliminating the problems referred to above. The use of Preventol D 2 does not generally lead to incompatibility. Nonetheless, the large number of products and applications encountered in practice makes it advisable to carry out compatibility tests and tests on microbiological effectiveness in the laboratory before using the preservative for the first time for a particular product or application. 3/6

4 Spectrum of activity Bacteria Aeromonas punctata Leuconostoc mesenteroides Bacillus mycoides 1000 Proteus mirabilis Bacillus subtilis 350 Pseudomonas aeruginosa 350 Desulfovibrio desulfuricans Enterobacter aerogenes Yeasts 50 Pseudomonas fluorescens 1000 Staphylococcus aureus Candida albicans 1 Saccharomyces bailii 1000 Candida krusei 2000 Torula rubra 0 Rhodotorula mucilaginosa Saccharomyces cerevisiae 2000 Torula utilis 1000 Fungi Alternaria alternata Chaetomium globosum Aspergillus flavus 2000 Mucor racemosus 1 Aspergillus niger 1 Penicillium glaucum 2000 Aspergillus terreus 1000 Rhizopus stolonifer 1000 Aspergillus ustus 2000 Trichophyton mentagrophytes 100 4/6

5 Suggested additions Examples: Polymer dispersions Emulsion paints Adhesive dispersions Plaster, knifing fillers Emulsion paints containing oil or alkyd resins Electrophoresis baths Dyestuff pastes Filler suspensions, pigment slurries Starch slurries Thickener stock solutions Adhesives based on starch, dextrin and/or cellulose derivatives Metalworking fluids in the ready-to-use dilution Concrete additives Auxiliaries for the textile and tanning industries Spinning preparations Detergents Disinfectant system cleaners e.g. 15 % in cleaner concentrate (application concentration of the system cleaner 1-3 %) 5/6

6 Registration / Approval / Recommendation 11th Federal German Regulation on Cosmetics (1988) Appendix VI, Part 1. Preventol D 2 is included in the list of approved preservative for cosmetics which are rinsed out again. Max. use concentration: 0.15 %. Recommendations XIV and XXXVI of the Plastics Commission of the Federal German Health Office also approves the use of Preventol D 2 as a preservative. "All Lanxess Biocides, depending on their concentration and labeling, are in accordance with the requirements of the Nordic Swan and the European Ecolabel for indoor paints and varnishes." Up-to-date information on the registration status of our products can be obtained from: LANXESS Deutschland GmbH Business Unit Material Protection Regulatory Affairs Leverkusen / Germany Fax: ( ) Precautions Preventol D 2 is a clear, lowviscosity liquid with characteristic odour. Skin contact with the product and inhalation of vapour should be avoided. The precautions generally recommended for handling of chemicals should be observed, e.g. wearing of protective clothing, safety goggles and protective gloves. If the product comes into contact with skin, the affected area should be washed immediately with soap and plenty of water; splashes in the eyes should be rinsed off with plenty of water immediately. Medical attention should be obtained. Contaminated clothing should be changed immediately. The current safety data sheet should be observed. This contains further information on labelling, transport and storage as well as information on handling, product safety, toxicity and ecology. Use biocides safely. Always read the label and product information before use. Labelling This product information must be used in conjunction with section 15 of the currently valid safety data sheet for the product which indicates labelling according to the German Hazardous Substances Regulation and the corresponding EU Directive. 6/6 This information and our technical advice - whether verbal, in writing or by way of trials - are given in good faith but without warranty, and this also applies where proprietary rights of third parties are involved. Our advice does not release you from the obligation to verify the information currently provided - especially that contained in our safety data and technical information sheets - and to test our products as to their suitability for the intended processes and uses. The application, use and processing of our products and the products manufactured by you on the basis of our technical advice are beyond our control and, therefore, entirely your own responsibility. Our products are sold and our advisory service is given in accordance with the current version of our General Conditions of Sale and Delivery. LANXESS Deutschland GmbH Business Unit Material Protection Leverkusen/Germany Edition: