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Science-Based Carbon Reduction Targets: An Entry Ticket to Carbon-Based Business BenefitsCo-produced with ACS Professional Education



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www.acs.org/heroes

Accepting nominations

until April 6, 2017

Deadline for submissions is March 1, 2018

The team from Dow Chemical developed Avanse acrylic resins and Evoque

precomposite polymers to help make architectural paints greener and more

economical. The team was recognized among the 2017 Heroes of Chemistry

for their work. Do you know an industry chemist or team that deserves to

be recognized as Heroes of Chemistry this year?

Nominations for

2017 ACS Fellows:February 1, 2017 through

April 6, 2017

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www.acs.org/acswebinarsSlides available now and an invitation to view the recording will be sent when available.

Painting a Brighter Future with Chemistry: Innovating with Higher Performing and More Sustainable Pre-composite Polymers

This ACS Webinar was co-produced by ACS Industry Member Programs, C&EN, and ACS Committee on Corporation Associates

Mark JonesExecutive External Strategy and

Communications Fellow,

Dow Chemical Company

Stan Brownell Senior Research Scientist,


James BohlingFellow, Dow Chemical Company

1/10/2018

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Painting a Brighter Future with Chemistry:

Innovating with Higher Performing and More

Sustainable Pre-composite Polymers

James Bohling Stan Brownell

[email protected] [email protected]

®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Dow Coating Materials

What is in a Can of Architectural Paint

14

Water

Additives

Binder(s)

TiO2

Other pigments

Extenders

Wet Film Dry Film

Architectural Coatings offer improved aesthetics as well as critical protection to the

substrate. Opacity as well as properties such as stain and dirt pickup resistance

and wash-ability are typically valued.

mailto:[email protected]

mailto:[email protected]

1/10/2018

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Historical Impacts: Volatile Organic Compound Content of Architectural Coatings has been Minimized

• In the past volatile solvents were

employed to facilitate acceptable

low temperature film formation with

polymer hardness‒ Advancements such as advanced

morphology and ambient cure

crosslinking have helped to

facilitated high performance at

lower VOC levels

‒ There are about 700 million

gallons of house paint sold in the

US each year

• Many paints are now marketed as

“no” or “zero” VOC though these

definitions are unclear

0

100

200

300

400

500

600

700

800

Gra

ms/L

iter

VOC ContentArchitectural Wall Paint

2007 ARB SCM for Architectural Coatings

RAL-UZ 102 Low Emission Wall Paints

15

Tougher Films without Solvent

Minutes

1-3 Days

16

Tg(Fox) BA:MMA:MAA

21C 49:50:1

6.2C 59:40:1

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Latex Particle Morphology - Micrographs

17

Life Cycle Impact Assessment

18

(ISO 14040/44, Third Party Validation)

• ”Comparative Life Cycle Assessment (LCA) of Water-borne paints for internal and external wall decoration and protection,“ Presentation

to Peers for Project Review, Dr. H. Kheradmand, LCA and Sustainable Development Expert, Dow Coating Materials (DCM) EMEA,

September 20, 2011.

• Trapani, A.; Bleuzen, M.; Kheradmand, H.; Koller, A. The Use of TiO2-Polymer Composites to Lower Environmental Impact and Improve

Performance of Waterborne Paints, Paintistanbul 2012, September.

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Life Cycle Impact Assessment

19

TiO2• ”Comparative Life Cycle Assessment (LCA) of Water-borne paints for internal and external wall decoration and protection,“ Presentation

to Peers for Project Review, Dr. H. Kheradmand, LCA and Sustainable Development Expert, Dow Coating Materials (DCM) EMEA,

September 20, 2011.

• Trapani, A.; Bleuzen, M.; Kheradmand, H.; Koller, A. The Use of TiO2-Polymer Composites to Lower Environmental Impact and Improve

Performance of Waterborne Paints, Paintistanbul 2012, September.


Audience Challenge QuestionANSWER THE QUESTION ON BLUE SCREEN IN ONE MOMENT

• Provides texture to surface and control gloss

• Its high refractive index yields light scattering and opacity

• Stabilizes coating against UV degradation

• Its hardness provides abrasion resistance

• All of the above

Why is titanium dioxide used in paints?

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Light Scattering is a Critical Property For Many Coatings

21

Surface

Paint Film

Substrate

Light Absorption Light Scattering

Material Refractive

Index

TiO2 2.7

ZnO 2.0

Extender 1.5 - 1.6

Air 1.0

Polymer 1.5 – 1.6

Optimal Light Scattering

• Refractive Index Differences

• Pigment Particle Size

• Pigment Dispersion Quality

Light Scattering is a Critical Property For Many Coatings

22

Surface

Paint Film

Substrate

Light Absorption Light Scattering

Material Refractive

Index

TiO2 2.7

ZnO 2.0

Extender 1.5 - 1.6

Air 1.0

Polymer 1.5 – 1.6

Optimal Light Scattering

• Refractive Index Differences

• Pigment Particle Size

• Pigment Dispersion Quality

Powdered Sugar

< 0.1 mmGranulated Sugar

~ 0.5 mmRock Candy

> 5 mm

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TiO2 is the Best Pigment for Light Scattering But it has a Deficiency

23

TiO2 is the primary white

pigment in paint. It scatters light

and provides hiding.

Inefficiencies of TiO2

In a typical paint, TiO2 distribution

is worse than random.

In areas of high concentration,

light scattering zones overlap

and create inefficiency.

As paint film dries,

crowding occurs and

creates regions of high

and low concentration.

Dispersion Stability

TAMOL™

Dispersant

circa. 1950s

Polymeric Pigment

ROPAQUE™

Opaque Polymer

1980

Pigment Efficiency

EVOQUE™

Pre-Composite Polymer

2012

Developing enabling technology for pigment efficiency

Technology Evolution

Technology For Improving Pigment Efficiency

24

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Opaque Polymer-Replacing Pigment with Air

•Synthetic pigment - not a binder

•Opacifying pigment, scattering by the air void upon drying

•Partially replaces TiO2 as white pigment

pSty n=1.60H2O n=1.33

pSty n=1.60Air n=1.00

WET DRY

Polymer

Air Void (dry)

Polymer

Air Void (dry)

Efficient Scattering

Refractive Index

Difference

(full of water)

• Adsorbing latex would self assemble to form discrete pigment polymer composites

• Complements improvements existing from opaque polymers & dispersants

• Benefits are additive

EVOQUE™ Pre-Composite Polymer is a Hiding Breakthrough

26

TiO2 +

Precomposite

Polymer

TiO2 Only

TiO2 +

Precomposite

Polymer

TiO2 Only

TiO2 +

Precomposite

PolymerTiO2 Only

1/10/2018

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• A) The interaction between the pigment and polymer could be too aggressive, resulting in destabilization of the paint

• B) The interaction between the pigment and polymer could be too weak, resulting in ineffective and / or incomplete composite formation

• C) The higher mass resulting from the composite formation (i.e., latex + pigment) could exceed the stabilization of the latex system, resulting in agglomeration over time

• D) All of the above

How hard could that be…what could go wrong?

Balancing Reactivity

28

TiO2 Surface Treatment

(Al/Si)Adsorbing Latex

CompositesNo Adsorption Agglomerates Grit

1/10/2018

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Uniform TiO2 Distribution

29

SEM of Regular Paint

• Brighter spots indicate

TiO2 is above the surface

SEM of Composite Paint

• More uniform distribution

of TiO2

• Surface of polymer

• Higher Performance at equal cost or

equal performance at lower cost

Conventional TiO2 Paint

3-D SEM Micrographs - Film

TiO2 - Polymer Composite Paint

Film Distribution

30

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Helps Improve Performance

• Corrosion resistance over ferrous metal

• Tannin blocking over wood

• Clean-ability of household stains

• Better performance can lead to less

repainting

Improved Distribution = Improved Barrier Performance

TiO2 OnlyTiO2 +

EVOQUETM Polymer

Barrier Properties of Film Improved

By isolating the TiO2 particles from one another,

barrier properties of the film can be improved.

31

TiO2 OnlyTiO2 +

EVOQUETM Polymer

TiO2 OnlyTiO2 +

EVOQUETM Polymer

Helps Improve Performance

• Corrosion resistance over ferrous metal

• Tannin blocking over wood

• Clean-ability of household stains

• Better performance can lead to less

repainting

Improved Distribution = Improved Barrier Performance

TiO2 OnlyTiO2 +

EVOQUETM Polymer

Barrier Properties of Film Improved

By isolating the TiO2 particles from one another,

barrier properties of the film can be improved.

TiO2 Only

TiO2 +

EVOQUETM Polymer

TiO2 Only

TiO2 +

EVOQUETM Polymer

32

Corrosion Resistance

Tannin Blocking

1/10/2018

17


Why do exterior paints look “chalky” over time?

• A) UV light crosslinks the binder resulting in the pigment particles being “squeezed-out” of the bulk film

• B) The binder erodes over time, increasing the local concentration of pigment and simultaneously resulting in those pigment particles being “unbound” in the bulk film

• C) Dirt and other material collects on the surface

• D) The refractive index of the pigment changes the longer it is exposed outside

• E) All of the above

Photooxidation of (Meth)acrylates and Film Degradation

DOW RESTRICTEDO. Chiantore, Photooxidative degredation of acrylic and methacrylic polymers, Polymer 41 (2000) 1657.

J. H. Colling and J. Dunderdale, The durability of paint films containing TiO2, Prog. in Organic Coatings 8 (1981) 47.

UV damage affected by:

1) Pigment (type, size, flocculation,

absorption/scattering)

2) Angle of incidence, wavelength

3) Water and oxygen penetration

4) Other factors…

Weathering of exterior paints is strongly impacted by oxidative

degradation of polymer chains and subsequent polymer erosion,

leaving a surface enriched in unbound inorganic particles (chalking).

For most systems, a gloss decrease is noted before chalking is

observed during both natural and accelerated weathering. The loss

of gloss is due to a roughening of the paint surface.

1/10/2018

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Photooxidation of (Meth)acrylates and Film Degradation

DOW RESTRICTEDO. Chiantore, Photooxidative degredation of acrylic and methacrylic polymers, Polymer 41 (2000) 1657.

Polymer Composites Improve Exterior Durability

36

• In general, a paint predicated on TiO2-Polymer composite technology has better exterior

durability (Gloss Retention and Tint Retention) relative to their non-composite analogues

• Several theories as to why….

Cause Effect

Lower levels of TiO2 Less radicals generated

Better distribution of TiO2 Protects the bulk film

Binder-rich layer on the surface Protects the bulk film

Forms a ‘tighter’ film Less permeable to H2O and O2

TiO2 is encased in polymer Minimizes H2O and O2 from

interacting with TiO2; Captures

radicals

1/10/2018

19

50

60

70

80

90

100

Primary Energy

Consumption

Water

Consumption

Wastes

Non-Methanic

Volatile Organic Compounds

Chemical

Oxygen Demand

Air Acidification

Potential

Resources

Depletion

Euthrophication

Potential

Green-house

Effect

Human Toxicity

Control

Opaque Polymer

Pre-Composite Polymer

Pre-Composite Polymer and Opaque Polymer

30 PVC Interior Semigloss

Acrylic Paint

• ”Comparative Life Cycle Assessment (LCA) of Water-borne paints for internal and external wall decoration and protection,“

Presentation to Peers for Project Review, Dr. H. Kheradmand, LCA and Sustainable Development Expert, Dow Coating Materials

(DCM) EMEA, September 20, 2011.

• Trapani, A.; Bleuzen, M.; Kheradmand, H.; Koller, A. The Use of TiO2-Polymer Composites to Lower Environmental Impact and

Improve Performance of Waterborne Paints, Paintistanbul 2012, September.


Sustainability

37

Benefits of More Ordered Paint Films

Sustainability

• Reduced resource consumption

• Reduced CO2 emissions

• Reduced impact on air and water quality

Performance

• Fewer coats

• Greater durability

• Longer re-paint intervals

• Multi functional

Cost

• Lower raw material cost

• Lower formulated cost

• Lower transportation cost

• Lower application cost

38

EVOQUE™ Pre-Composite Polymer Technology

1/10/2018

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39

Thank You

Before using any product mentioned herein, consult the product’s Material Safety Data Sheet (MSDS)/Safety Data Sheet (SDS) for details on product hazards, recommended handling precautions and product storage.

Dow has a fundamental concern for all who make, distribute, and use its products, and for the environment in which we live. This concern is the basis for our product stewardship philosophy by which we assess the safety, health, and environmental information on our products and then take appropriate steps to protect employee and public health and our environment. The success of our product stewardship program rests with each and every individual involved with Dow products - from the initial concept and research, to manufacture, use, sale, disposal, and recycle of each product.

Dow strongly encourages its customers to review both their manufacturing processes and their applications of Dow products from the standpoint of human health and environmental quality to ensure that Dow products are not used in ways for which they are not intended or tested. Dow personnel are available to answer your questions and to provide reasonable technical support. Dow product literature, including safety data sheets, should be consulted prior to use of Dow products. Current safety data sheets are available from Dow.

NOTICE: No freedom from infringement of any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer's use and for ensuring that Customer's workplace and disposal practices are in compliance with applicable laws and other government enactments. The product shown in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made may not have been approved for use in all countries. Dow assumes no obligation or liability for the information in this document. References to “Dow” or the “Company” mean the Dow legal entity selling the products to Customer unless otherwise expressly noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.

NOTICE: If products are described as "experimental" or "developmental": (1) product specifications may not be fully determined; (2) analysis of hazards and caution in handling and use are required; (3) there is greater potential for Dow to change specifications and/or discontinue production; and (4) although Dow may from time to time provide samples of such products, Dow is not obligated to supply or otherwise commercialize such products for any use or application whatsoever.

HANDLING PRECAUTIONS

PRODUCT STEWARDSHIP

CUSTOMER NOTICE

40

1/10/2018

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42

www.acs.org/heroes

Accepting nominations

until April 6, 2017

Deadline for submissions is March 1, 2018

The team from Dow Chemical developed Avanse acrylic resins and Evoque

precomposite polymers to help make architectural paints greener and more

economical. The team was recognized among the 2017 Heroes of Chemistry

for their work. Do you know an industry chemist or team that deserves to

be recognized as Heroes of Chemistry this year?

Nominations for

2017 ACS Fellows:February 1, 2017 through

April 6, 2017

1/10/2018

22


43






44










1/10/2018

23

45









James BohlingExecutive External Strategy

and Communications Fellow,


46

“This ACS Webinar was quite informative. As a consultant I am always well informed in the scientific discovery, methods and analysis. I am very grateful and thankful to ACS for providing such an opportunity to learn.”

Be a featured fan on an upcoming webinar! Write to us @ [email protected]

How has ACS Webinars benefited you?

®

Tanvir Mahmud, MS, MCC Founder and Principal, Find Your Solution

http://bit.ly/ACSiss8

1/10/2018

24

47

youtube.com/acswebinars


48

Benefits of ACS Membership


Chemical & Engineering News (C&EN) The preeminent weekly news source.

NEW! Free Access to ACS Presentations on Demand® ACS Member only access to over 1,000 presentation recordings from recent ACS meetings and select events.

NEW! ACS Career Navigator Your source for leadership development, professional education, career services, and much more.

1/10/2018

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ACS Webinars does not endorse any products or services. The views expressed in this presentation are those of the presenter and do not necessarily reflect the views or policies of the American Chemical Society.

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