A Sustainable and Novel Microbial Control dry film Concept ... · A Sustainable and Novel Microbial...

A Sustainable and Novel Microbial Control dry film Concept to meet both Regulatory and

Performance Challenges

Agenda

Why is there a need to use fungicides or algicides?

Definition of sustainability

Example of a sustainable concept : Polymer Shielded Technology

2

YesCMIT/MIT

THPS

Yes

Yes

Yes

Dow Unique

DXN

DTEA

TRIS NITRO

2-Phenoxyethanol

YesMBIT

YesDTBMA

YesOBPA

Silver Nitrate

MIT

USEPA

Dow Unique

EU BPDactive Ingredient

YesCMIT/MIT

THPS

Yes

Yes

Yes

Dow Unique

DXN

DTEA

TRIS NITRO

2-Phenoxyethanol

YesMBIT

YesDTBMA

YesOBPA

Silver Nitrate

MIT

USEPA

Dow Unique

EU BPDactive Ingredient

YesYesP-1487

YesYesAmical

Yes

Yes

Yes

Yes

Dow Unique

YesDMO

OIT

YesEBCO

Yescis-CTAC

YesCTAC

DBNPA

BIT

OPP/SOPP

Bronopol

Glutaraldehyde

IPBC

DCOIT

USEPA

Dow Unique

EUBPDactive Ingredient

YesYesP-1487

YesYesAmical

Yes

Yes

Yes

Yes

Dow Unique

YesDMO

OIT

YesEBCO

Yescis-CTAC

YesCTAC

DBNPA

BIT

OPP/SOPP

Bronopol

Glutaraldehyde

IPBC

DCOIT

USEPA

Dow Unique

EUBPDactive Ingredient

Dow Microbial Control is the leading registrant in active ingredients, including several chemistries unique to Dow.

* New active: BPD dossier on going

Dow Microbial ControlWhole Actives Portfolio

Agenda




4

How does film contaminationoccur ?

Contamination can come from the environmenttrees, fields, pollen and dust etc.

In high summer 1 cm3 of air contains 2,000 pollen particles

In high summer 1 cm3 of air contains 20,000 fungal spores

Contamination can come from the substrate

Contamination can come from people

Why use fungicides and algicides ?

Consumer expectations are higher

Consumers want the coating to look better

Consumers want the coating to last longer

Why use fungicides and algicides in coatings ? Maintain aesthetic properties – no discoloration

Protective measures - stops water uptake - no premature failure leading to loss of adhesion – ultimately blistering / flaking

Helps prevent damage of the substrate - concrete, brick etc

Prevents film breakdown due to corrosive metabolites from microbial growth

For interior applications prevents growth of fungi – health hazard / allergic reactions helps alleviate problems with dampness – no respiratory tract

infections

Requirements for growth

Moulds + yeasts Algae

Light ( UV ) No YesIdeal pH 3 - 6 Ca. 7Temperature 20 - 35°C 15 – 30°CNutrients C, H + N CO2

Trace elements Yes Yes

Oxygen Yes YesWater Yes Yes

Agenda




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Diagram of sustainable development

101-Adams, W.M. (2006). "The Future of Sustainability: Re-thinking Environment and Development in the Twenty-first Century." Report of the IUCN Renowned Thinkers Meeting, 29–31 January 2006. Retrieved on: 2009-02-16.

diagram of sustainable development: at the confluence of three constituent parts 1

For humans, sustainability is the potential for long-term maintenance of well being and requires the reconciliation of environmental, social equity and

economic demands

Sustainable Chemistry

Sustainable chemistry builds upon the principles of green chemistry by integrating economic viability and socialbenefits across the lifecycle, for a given application.

More sustainable products require more efficient use of materials and resources, and must also be profitableand useful to society.

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Sustainable biocides

The proper use of biocides is good forsustainable development…

keeps a hygienic environment increases durability of products, process fluids allows use of water-based or natural products reduces CO2 emission, enhances energy-efficiency

… but biocides also have an impact on the environment that must be mitigated

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A Relevant Definition

A sustainable biocide should: do its job effectively:

Control and Prevent nuisance and growth of harmful microorganisms

And Goes Away: Degradable Non-Persistent Non-Accumulative Collected and recycled / reused

does No Harm to: Workers, products or processes Downstream users, consumers The environment Society

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Effective Goes Away Does No Harm

General requirements for a biocide

stable over a wide pH range (both in the wet-state and in the cured film) low vapour pressure of the active components no discoloration of the product to be protected no incompatibility – no effect on rheology easy to disperse and handle cost-effective offer leach-out stable, long-term protection UV stable broad spectrum of activity against all commonly occurring species low toxicity to humans and to the environment biodegradable active components fulfil all of the legislation requirements of the country

14

Sustainable criteria for exterior use

Effective against fungi, algae and lichens no discoloration formaldehyde free use active ingredients not based on heavy metals, for example zinc, should not contain any active ingredients on the EU water-watch list, should be labelling-free according to current EU legislation, should improve the UV resistance, should improve the leach-out profile, offer better long-term protection against microbial disfigurement, pose no threat to the environment, be readily biodegradable, pose no threat to the health of the user, reduce any harmful effect

associated with the active ingredient(s)

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Agenda




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The biocide is enveloped in the polymer micelles and thereby shielded in the paint

Polymer containing

biocide

Polymer containing

biocide

PaintPaint

Electron Micrograph showing polymer in BIOBAN™ 350 PST

DCOIT in the Polymer

The PST Technology

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The PST TechnologyThe new generation of dry film microbial control solutions

Novel, non-hazardous Polymer Shielded Technology

Improved safety profile versus alternative technologies

Increased UV Stability Increased addition options with no R-43 label

Excellent water leaching properties retained

Offers sustainable, cost effective long-term protection

DCOIT shielded by polymer

Combine Technology + Actives that answer sustainable criteria

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Minimum Inhibitory Concentration values of DCOIT

BIOBAN 350 PST (Polymer Shielded Technology) combines 2 actives:

- DCOIT - efficient against Algae, Fungi and bacteria- very low water solubility : 2 ppm- extremely low water solubility and long term performance- quickly biodegraded in the environment

- IPBC- efficient against fungi- quickly biodegraded in the environment

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Introducing Polymer Shielded Technology from Dow Microbial Control

SUSTAINABILITYSUSTAINABILITYSUSTAINABILITY

FLEXIBILITY OF ADDITION LEVELS



SAFETY PROFILESAFETY PROFILESAFETY PROFILE

SUPERIOR PROTECTION

SUPERIOR PROTECTION

SUPERIOR PROTECTION

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Introducing BIOBANTM 350 PST the First Product of the PST FamilyNovel alternative technology solving the ”encapsulation” challenge





No R43 label of paint required at recommended use concentrationsNo R43 label of paint required at recommended use concentrations


Reduced dermal bioavailabilityReduced dermal bioavailability

SUPERIOR PROTECTION

SUPERIOR PROTECTION

SUPERIOR PROTECTION

Sensitization – the theory

SN

Cl

Cl O

C8H15

The allergen has to migrate through parts of the skin to reach the Langerhans cells to cause a skin contact allergy (contact dermatitis)

23

Polymer shieldedTechnologyProtected in high-affinity polymer

Very low free DCOIT concentration.

BIOBAN™ 350 PSTReduced dermal bioavailibility

Protected ai`s

24

Introducing BIOBANTM 350 PST the First Product of the PST FamilyNovel alternative technology solving the "encapsulation” challenge




SUSTAINABILITYSUSTAINABILITYSUSTAINABILITY Broad spectrum of activity against fungi and algaeBroad spectrum of activity against fungi and algae

Leach out stableLeach out stable


UV stable UV stable

Outperforms ZPT/OIT/Terbutryn formulationsOutperforms ZPT/OIT/Terbutryn formulations

SUPERIOR PROTECTION

SUPERIOR PROTECTION

SUPERIOR PROTECTION

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Increased UV Stability through PST(QUV challenge)

QUV conditions: 1 cycle 8h UV 340nm, 55ºC/4h condensation 45ºC

QUV time = 100% QUV time = 125%

Styrene-acrylic paint (high PVC)

Styrene-acrylic paint (high PVC)1000 ppm DCOIT w/o PST

Styrene-acrylic paint (high PVC) 1000 ppm DCOIT with PST

X

X

X

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BIOBANTM 350 PST outperforms industry standard

Industry Standard(Carbendazim/OIT/Diuron)

Method Used 5 leach-out cyclesTypical silicone/styrene acrylic exterior paint pH 8.3Tests done according to EN 15147/EN 15458

BIOBANTM 350 PST

At 0.45%, BIOBAN™ 350 PST provides superior protection against mould and algae than the industry standard at 1.0%

0.44%

0.74%

0riginal 1 2 3 4 5

0.44%

0.74%

0riginal 1 2 3 4 5 Leach-out cycles

0.50%

1.00%

1.50%

0riginal 1 2 3 4 5

0.50%

1.00%

1.50%

0riginal 1 2 3 4 5 Leach-out cycles

Mould Mixture (including Alternaria alternata)

Algae Mixture

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Outdoor Exposure Tests

Styrene Acrylic paint, 6 months: North/ 60deg exposure. After paint aging at 40 degC

0.74% Bioban 350 PST

0.88% Bioban 350 PST

1.5% encapsulated OIT+ZPt+Terbutryne

0.74% encapsulated OIT+ZPt+Terbutryne

Controlled Release Technology principle

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Claimed Controlled Release mode of action

Standard Formulation

Release of actives is dependant on formulation, dispersant, pH, and especially temperature

Real Mode of action of “controlled” release technology

> T: Biocide is not enough concentrated to be efficent

Risk of non compliance when usingControlled Release Technology withsome activesLimits for ingredients with risk phrases R50 and R50/53 based on LC50 (fish) or

EC50 (daphnia) and IC50 (algae) (Directive 2006/8/EC):

TerbutrynC >= 0,25% : N; R50/530,025% or 250ppm <= C < 0,25% : N; R51/53

0,0025% or 25ppm <= C < 0,025% or 250ppm : R52/53

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Conclusion: Release of the substance is difficult to control since it depends of paint parameters like dispersant, pH, temperature of storage before use

Amount of controlled release algicide found in a fresh formulated paint, treated with an encapsulated algicide:

Expected Terbutryn free in the paint: based on Controlled Release Technology 50ppm = no labelling

Terbutryn actually measured in a fresh paint: 333ppm N labelling

3030

Introducing BIOBANTM 350 PST the First Product of the PST FamilyNovel alternative technology solving the ” encapsulation” challenge





Formaldehyde free at use concentrations


Low leaching and biodegradableLow leaching and biodegradable

No classical algaecide neededNo classical algaecide needed

Carbendazim freeCarbendazim free

Diuron freeDiuron free

VOC-freeVOC-freeSAFETY PROFILESAFETY PROFILESAFETY PROFILE

SUPERIOR PROTECTION

SUPERIOR PROTECTION

SUPERIOR PROTECTION

3131

Designed to meet both BPR & CLP

Carbendazim free, Diuron free, and VOC free Increased addition levels → no R-43 labelling for the paint

Low leaching and quickly biodegraded in the environment

Effective fungicide and algaecide dry film preservative

Built on the performance of ROCIMA™ 350

Difference PST vs. other “protected technologies”

Formaldehyde free protection technology at use concentrations

Water-release kinetics remains the same as too strong encapsulation can make actives non-bioavailable

Performance of the product after aging and long-term storage remains the same due to its patented stabilisation system

BIOBANTM 350 PSTDriving sustainability for dry film protection

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Additional pressure expected on traditional algaecides Terbutryne has been identified by the EU Commission and could join Diuron and

Isoproturon on the Priority Substances List under the Water Framework Directive (2000/60/EC).

The impact of inclusion on the Priority List is 3-fold:

The EQS (Environmental quality standard) proposed are very low, close to the PNEC.

Increase monitoring in the European water bodies even at very low level, so priority substances will likely be more detected

This will negatively impact their evaluation under the BPR for any dispersive uses like PT7 (exterior paints), PT10 (construction). This together with the fact they are all persistent will probably make them candidates for substitution (if not directly banned).

Changing Regulatory Landscape

No classical algaecide neededNo classical algaecide needed

No R43 label of paint required at recommended use concentrationsNo R43 label of paint required at recommended use concentrations

Reduced dermal bioavailabilityReduced dermal bioavailability


FLEXIBILITY OF DOSING OPTIONSFLEXIBILITY OF

DOSING OPTIONSFLEXIBILITY OF

DOSING OPTIONS

Diuron freeDiuron free

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Conclusions

Novel alternative technology solving the "encapsulation” challenge


Carbendazim freeCarbendazim free

Outperforms ZPT/OIT/Terbutryn formulationsOutperforms ZPT/OIT/Terbutryn formulations

Low leaching and quickly biodegradedin environmentLow leaching and quickly biodegradedin environment

VOC-freeVOC-free



Performs at lower dosagePerforms at lower dosage

Broad spectrum of activity against fungi and algaeBroad spectrum of activity against fungi and algae

Leach out stableLeach out stable

UV stable UV stable SUPERIOR

PROTECTIONSUPERIOR

PROTECTIONSUPERIOR

PROTECTION

High use rate allowedHigh use rate allowed

Thank you for your attention

Any Questions?

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