Paper industry biocides - BASF USA - Home

1 Specialty Chemicals by BASFP aper industry biocidesBASF BiocidesPAGE 2 Innovation, preservationanddisinfectionPAGE 3 basf biocides - protecting the worldThe biocide business for Specialty Chemicals, basf AGBASF is one of the world s leading suppliers ofspecialty biocides . We create products that makelife safer, simpler and more comfortable formillions of people high performance biocides are used in everyaspect of life. From toiletries, to air conditionersused in both industry and home, from Iceland toEquador our technology spans the globe inpreservation and disinfection. We help to protectthe lives of millions of people across the worldevery our product range, marketing expertise,technical and regulatory knowledge, basf sinnovative biocides approach positions thebusiness at the very forefront of antimicrobialtechnology.

2 The marketing, technical and researchand development headquarters for basf sspecialty biocide business is located products are made in state of the art manufacturing facilities at Cramlington, Englandand Ludwigshafen, Germany. In each of ourplants, the expert integration of process andenergy requirements leads to manufacturingefficiencies and quality demonstrate our commitment to our customers,we have made significant investment in long termdedicated biocide resources within Europe, AsiaPacific and the 2000, we established a direct presence in theUSA with a new dedicated marketing andtechnical centre based at basf Corporationheadquarters in Mount Olive, New Jersey. Productis supplied through an integrated basf warehousing facility in Charlotte, North US operation is part of basf Corporation sChemical Division, situated in Mount Olive, we work for youBASF s biocides are sold through basf sestablished network of sales offices worldwide.

3 Inthis way, we aim to offer valuable local supportand the highest standards of customer with basf provides access to manyessential regulatory approvals. For example ourEPA registrations allow products and customerformulations to be sold in the USA and ourapprovals ensure supply to the Paper industry inthe Nordic area. We are also well positioned tosupport our actives under the European BiocidalProducts believe in long-term commitment to ourproducts and customers and this is reflected inour substantial registrations and the data requiredto obtain them. To this end many of our productsare supported with extensive safety andenvironmental data addition, basf is committed to providing thehighest standard of health, safety andenvironmental protection as part of ourcommitment to Responsible Care.

4 We continuallyresearch and innovate to produce the mostadvanced products on the basf , we are also constantly reviewing ways inwhich we can improve our products and servicesto ensure that we keep pace with the rapidlychanging developments in information is harnessing these changes and ensuringthat we are aligned with our customer srequirements, making it more efficient andconvenient for you to do business with s specialty biocide products are marketedunder the Myacide and Protectol trade 4 Introduction to the Paper Biocide IndustryMicrobiological Problems in thePaper IndustryThe Paper and paperboard industry is highlydiverse. Products range from specialised papersfor currency printing through to tissue andnewsprint production and the manufacture ofpaperboard for packaging.

5 Each of these areasdemands different approaches in terms of the rawmaterials used and the various additives neededto arrive at an acceptable finished of these areas, however, depend on a basicprocess where the Paper fibres are suspended ina large volume of recirculating water before beingremoved by filtration and compacted and dried toform the Paper sheet. Various water-basedadditives are also used to improve the efficiencyof the process and control the quality of thefinished Paper . These include flocculants,retention aids, fillers and Paper conditions, together with the operatingtemperatures, which are normally above 30 C,provide the ideal environment for the growth ofmicroorganisms, mainly bacteria.

6 Contaminationmay originate from the air, fresh water, virgin andrecycled pulp or waste the manufacturing process, this can result in thebuild up of slime at key points in the process. Ifuncontrolled, the slime can accumulate andeventually break away, leading to problems such aspaper breaks, spray nozzle blockage anddiscolouration of the finished product. Problemorganisms are the aerobic slime-forming bacteriasuch as Pseudomonas, Klebsiella, EnterobacterandBacillus spp. Anaerobic organisms such as theDesulphovibrio also accumulate underslime layers and other deposits leading to theproduction of foul odours and corrosive mill additives including mineralslurries and Paper coatings are also prone tocontamination and require adequate preservationto ensure that their stability is not major spoilage organisms are aerobicbacteria such as those mentioned above but insome instances yeasts such as CandidaandSaccharomyces moulds such asAspergillus spp.

7 Can be involved. Consequentlythere may be a need for broad spectrumpreservation in many of these additive of bulk pulp may also be requiredduring unplanned plant occurrence of these contamination andspoilage problems creates a demand forantimicrobial products, which can be ideallysatisfied by products from basf s specialtychemical biocide AS, AS Plus and S1/S15/S30 Biocide6 Protectol GA 50 / GA 24 Biocide10 Protectol DZ / DZ P Biocide12 Protectol HT Biocide14 PAGE 5 PAGE 6 Myacide AS, AS Plus and S1/S15/S30 BiocideMyacide AS biocide is the industrial grade of 2-Bromo-2-nitropropane-1,3-diol or Bronopol. Itprovides highly effective antimicrobial activity foruse in diverse and demanding industrial biocideapplications, combining well-proven efficacy withimportant environmental safety main benefits of Myacide AS in the paperindustry are its proven performance as a slimicideactive ingredient in mill process water and as aneffective preservative for mill additives.

8 The idealphysical and microbiological properties ofBronopol place it in a new generation of products,which can be seen replacing older Myacide AS is an off-white to pale yellow, freeflowing, crystalline solid. The product contains aminimum of 98% 2-Bromo-2-nitropropane-1,3-diolalthough typical purity values are significantlyhigher. As supplied it is stable for a minimum of 3years when kept under good storage AS Plus is marketed only in the USA asan EPA end use product. The technicalspecification and product quality are the same asMyacide FormulationsA range of commercial formulations is readilyavailable. Myacide S1 is a 20% (w/v) solution indipropylene glycol monomethyl ether S15 is a 10% (w/w) solution inpropylene glycol and S30 is a 30% (w/w) solution inpropylene glycol and water.

9 ANTIMICROBIAL ACTIVITYThe spoilage of Paper , pulp, mineral slurries,coatings and other additives is generally due to amixed population of bacteria and to a lesserextent fungi. Bronopol is highly effective,particularly against aerobic slime-forming bacteriasuch as Pseudomonasspp., Klebsiellaspp.,Bacillusspp. and the Enterobacterspp. Thefollowing table compares the Minimum InhibitoryConcentrations ( ) of Bronopol against sixkey data is generated according to have been no reported cases of resistanceto Bronopol in over twenty years of use. Recentfield trials have shown excellent activity againstPseudomonasspecies resistant to othercommonly used biocides such as those based onisothiazolinones.

10 USAGE RECOMMENDATIONSS olubility, Stability and CompatibilityBronopol is readily water-soluble and solutionscontaining up to 28% w/v are possible at ambienttemperature. The compound also shows a higheraffinity for polar organic solvents ( propyleneglycol 50% w/v) which makes it very easy to useeither as a liquid or a s stability is one of the most importantfactors in the Paper industry for long termpreservation. It shows optimum pH stability in theacidic range with excellent efficacy. At alkalinepH, Bronopol is less stable but still provideseffective control. In these systems, Bronopolreaches an equilibrium with its breakdownproducts, which are also microbiologically self-stabilisation means that preservativeefficacy can be maintained over an extended shelflife even within aggressive, more (ppm)Staphylococcus - 50 Bacillus - 50 Desulphovibrio - 50 Pseudomonas - 50 Candida spp400 Aspergillus spp3200 PAGE 7 Bronopol is compatible with a range of materialsused in the pulp and Paper industry such asretention aids, flocculants and other biocides suchas isothiazolinones.