Arkema Coating Resins Welcome to the 2014 ACR … 4 Cementitious... · Arkema Coating Resins...
Transcript of Arkema Coating Resins Welcome to the 2014 ACR … 4 Cementitious... · Arkema Coating Resins...
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Arkema Coating Resins
Welcome to the 2014 ACR Webinar Series!!
May 16, 2014
Invest one hour with us and we’ll help you grow your business with products and technology from Arkema Coating Resins
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2014 ACR Webinar Series
Today’s Topic: Cementitious Coatings
Speaker: Mike Kaufman
Title: Sr. Application Development Leader
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Our training goal
Give you the knowledge necessary to answer your customer’s questions concerning cementitious coatings with confidence • Outline the basics of cement and concrete
• Describe some of the testing protocols
• Outline the characteristics of the different product classifications
• Highlight several Arkema products and describe their performance benefits
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Agenda
What is concrete and how is it made?
The unique requirements of coatings for concrete
Markets and Product Categories
Paint formulating and testing basics
ACR products for cementitious coatings
Recap
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Concrete Basics
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Concrete is not a new invention
Concrete has existed for thousands of years. ● Archaeologist Heinrich Schliemann found
concrete floors in the royal palace of Tiryns, Greece, c. 1400 BC.
● The Assyrian Jerwan Aqueduct built c. 688 BC made use of fully waterproof concrete.
● The Romans used concrete extensively from 300 BC to 476 AD.
Roman concrete differed from modern concrete ● It was made from quicklime, pozzolana
and pumice aggregate. ● Its widespread use in many structures,
freed Roman construction from the restrictions of stone and brick and allowed for revolutionary new designs.
● The knowledge of concrete production was lost in the west with the fall of the Roman empire
Modern concrete was made possible with the invention of portland cement by Joseph Aspdin in 1824.
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Flavian Amphitheatre (80 AD)
Pantheon (135 AD)
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Cement is the “glue” in concrete
Cement is a basic ingredient of concrete.
Concrete is formed when cement reacts with water and binds sand and gravel in a harden matrix.
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Gravel (large aggregate)
Sand (small aggregate)
Cement
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Cement manufacturing is a multi-step process Common materials used to manufacture cement include limestone, shells, and chalk or marble combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore.
These ingredients, when heated at high temperatures form a rock-like substance called “clinker” that is ground into the fine powder that we commonly think of as cement.
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Coating Concrete
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Concrete structures must be protected from the “elements”
Concrete is dimensionally stable but very porous
It is susceptible to deterioration through the actions of water, air (oxygen and carbon dioxide) and salt(s)
Carbon dioxide from air will react with the calcium hydroxide in concrete to form calcium carbonate, in a process called carbonation.
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Concrete Carbonation
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Rebar Corrosion
Steel reinforcement is it’s Achilles' heel
Steel reinforcing rebar is employed in modern concrete structures to improve its tensile strength and ductility
Steel rebar is susceptible to corrosion ● The high alkalinity of the fresh concrete matrix protects the steel rebar
from corrosion ● Carbonation accelerates the rate of rebar corrosion by decreasing the
alkalinity of the surrounding concrete matrix. Below a pH of 10, the steel's thin layer of surface passivation dissolves and corrosion is promoted.
● Water and oxygen can then corrode steel reinforcing rebar ● The presence of salt(s) greatly accelerate the rate of corrosion
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Spalling accelerates the degradation of a structure
Corrosion of rebar causes cracking of the concrete matrix and leads to spalling
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Coating concrete extents its service life
Numerous approaches are employed to reduce the rate of corrosion ● Positioning of the rebar within the concrete matrix to ensure there is a adequate
concrete cover (if the reinforcement is too close to the surface, early failure due to corrosion may occur)
● Use of corrosion-resistant reinforcement such as uncoated, low carbon/chromium (micro composite), epoxy-coated, hot dip galvanized or stainless steel rebar
● Addition of corrosion inhibitors, such as calcium nitrite [Ca(NO2)2], to the water mix before pouring concrete
● Application of a sealant coating some time after curing
The benefit of coating concrete is additive ● Can be employed in conjunction with other anti-corrosion measures ● Can be employed after concrete structure is in place ● Works by reducing the permeability of concrete surface to water, air and salt(s)
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Cementitious Coatings Markets and Product Categories
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Numerous market segments….
Non-Residential Building ● Industrial ● Office & Commercial
Residential Building ● Exterior Broadwall ● Driveways & Sidewalks ● Flooring
Infrastructure ● Roads & Bridges ● Parking Structures and Stadiums
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…..With some end use applications
Wall paints which improve performance and aesthetics on masonry/concrete surfaces
Concrete stains that give high-end look to ordinary concrete patios
“Wet look” in demand for driveway and sidewalk sealers
Textured finishes refurbish “tired” concrete patios
Cure & Seals ensure maximum compressive strength and protects from staining
Concrete sealers also offer utility for infrastructure maintenance
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Paint Formulating and Testing
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Latex Polymer
Coalescent
Primary Pigments
Extender Pigments
Dispersants & Surf.
Defoamer
Preservative/Mildewcide
Thickener/Rheo. Mod.
Misc. Additives
− Film Former
− Plasticizer/Open Time
− Hiding Power
− Control Gloss
− Wetting
− Eliminate Foam
− Prevent Microbials
− Application
− Anti-Mar, etc.
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Paints are complex mixtures of raw materials
Component Function
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Pigments provide color and hiding
Prime – Hiding and color ● Titanium dioxide
Functional – imparts specific properties ● Zinc oxide: Used primarily in primers and exterior paints, it provides
mildew resistance and stain blocking properties. ● Zinc Phosphate : Corrosion control
Extender – flatness, sheen control, cost ● Calcium Carbonate: Used in both interior and exterior paints, a general
purpose, low cost, low hide pigment. ● Clay: Used mainly in interior paints, clay provides hiding power. ● Silica: Provides enhanced durability in exterior paints as well as scrub
and abrasion resistance. ● Talc: A soft, general purpose extender pigment. ● Diatomaceous silica: Consisting of fossilized organisms, this form of
silica is used to control sheen levels.
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Binder holds the pigment together
Water-borne latex ● Acrylic ● Vinyl acetate/Versatate copolymers ● Styrene acrylic
Alkyds – not used on concrete due to saponification resulting in failure
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Additives are critical to making a usable coating
Enhance numerous properties such as rheology, mildew resistance and other specific properties ● Rheology modifiers – HASE, HEUR, Cellulosic, HEURASE, ASE ● Preservatives and Mildewcides ● Dispersant and Surfactants ● Mar and Slip additives ● Coalescing solvent – aids in film formation ● Ethylene and propylene glycol – freeze thaw protection and open
time extension
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The proportion of raw materials affects quality
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Gloss Quality Flat Low-cost Flat
Liquid
Binder
Pigment
Liquid
Binder
Pigment
Liquid
Binder
Pigment
Higher quality coatings have more binder, less pigment and higher volume solids
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Pigment volume concentration is a key metric
Pigment Volume Concentration (PVC):
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PVC = x 100% volume of pigment
volume of pigment + volume of binder solids
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PVC tells us about the nature of the paint film
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paint film
substrate
Low PVC Film(< CPVC)
CPVC Film High PVC Film(> CPVC)
pigment
Critical Pigment Volume Concentration (CPVC) ● CPVC marks the transition from a system in which the pigment is dispersed
in a continuous binder matrix to one where there is insufficient binder to completely encapsulate all the pigments.
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Coatings properties change dramatically at CPVC
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PVC
blistering
gloss
film tensile
adhesion
permeability
rusting
CPVC
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Property Low PVC High PVC
Stain Removal ………………………...…. Good Poor
Scrub Resistance ……………………...… Good Poor
Dry Hiding …………………………….…... Fair Good
Efflorescence Resistance ….………….. Good Poor
Block Resistance ….…………………….. Poor Good
Moisture Permeability …...…………….. Low High
Tensile Strength ………………………….. High Low
Stain Resistance ………………………….. Good Poor
Numerous paint properties affected by PVC
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Interior Flat
15
25
35
45
55
65
75
Semigloss
Interior Satin
Exterior Sheen
Exterior Flat
High Gloss Enamel
Gloss Trim
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Pigment volume concentration
Paint Types
Paints are formulated over the entire PVC range
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Formulating coatings for cementitious substrates
Coatings used on concrete substrates: ● Vary in sheen from Gloss to Flat
– Covers the PVC range ● Vary in VOC content
– Texanol and Glycol impacted ● Will have varying strengths and weaknesses based on properties chosen
by developer – Efflorescence and Alkali resistance two most important properties for concrete
coatings – Tensile and Elongation important for Elastomeric coatings
● Can be applied either by brush, roller or spray gun – Rheology modifiers impacted
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Concrete presents some unique demands on a coating
Highly Alkaline ● Fresh concrete substrates are extremely alkaline (pH > 12.5) ● The surface of aged concrete has substantially less alkaline (pH ~8.5) due to
carbonation
It can be an extremely porous material ● High permeable to water which may result in efflorescence and/or blistering
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Key performance tests for cementitious coatings
Efflorescence resistance
Alkali resistance
Water vapor permeability
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Efflorescence is the migration of salts to the masonry surface
Three conditions must be satisfied for efflorescence to occur: ● There must be water-soluble salts present
somewhere in the wall. ● There must be sufficient moisture in the wall
to render the salts into a soluble solution. ● There must be a path for the soluble salts to
migrate through to the surface where the moisture can evaporate, thus depositing the salts which then crystallize and cause efflorescence.
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Concretes highly alkaline surface can degrade the binder
Hydrolysis of polymer backbone
O
C
CH3
O
H3C
-OHCH3-C-OH
OO
C
CH3
O
H3C
H+
( )n
( )n
-OHCH3OH+
CH3
O
O
C
( )n
H
O
O
C
( )n
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There is no single standard method for evaluating efflorescence resistance
Efflorescence resistance ● Tombstone method ● Cleveland Humidity on Alkaline substrate ● ASTM C1400 - Standard Guide for Reduction of Efflorescence
Potential in New Masonry Walls ● ASTM D7072 - Standard Practice for Evaluating Accelerated
Efflorescence of Latex Coatings ● Numerous customer specific test methods
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Nor for evaluating alkali resistance
Alkali resistance ● Alkaline soak ● Free film dissolution method ● ASTM D3643 - Standard Test Method for Acid Number of Certain
Alkali-Soluble Resins ● Numerous customer specific test methods
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Permeability testing conducted via ASTM protocols
Permeability ● ASTM D1653 - Standard Test Methods for Water Vapor Transmission
of Organic Coating Films ● ASTM E2338 - Standard Practice for Characterization of Coatings
Using Conformable Eddy-Current Sensors without Coating Reference Standards
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ACR Product Overview
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ACR’s broad toolbox offers the most options for solving customer problems
Broadest technology platform ● NEOCAR® Acrylic polymers ● Acrylic polymers ● Styrene acrylic polymers ● NEOCAR® polymers ● Vinyl acrylic polymers ● Vinyl acetate ethylene polymers ● Styrene-butadiene polymers
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Polymer composition can affect coating performance
Vinyl Acrylics
Conventional Acrylics
+ Neo Monomer
NEOCAR®
LATEX
+ Neo Monomer
NEOCAR®
Acrylics
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What is NEOCAR® Technology ?
They are modified Acrylic or Vinyl Acetate containing latexes with the Neo Monomer via emulsion polymerization. ● NEOCAR Latex - VA/Neo ● NEOCAR Acrylic - Acrylic/Neo
What is Neo monomer ● Highly Branched Esters of Monocarboxylic Acid ● Extremely hydrophobic
– Low oxygen content and water solubility ● Offers increased flexibility and elongation due to its low Tg
– Neo Monomer ( Tg, oC=-3 & 60) vs. Styrene ( Tg, oC=100) ● UV transparent monomer that offers outstanding durability ● Benefits of Neo Monomers
– Increased Hydrophobicity to impart in coatings - Exceptional water and alkali resistance - Improves chemical resistance - Exceptional flexibility and elongation
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Decreasing polymer oxygen content - Increasing hydrophobicity
37%
25%
32%
Butyl Acrylate
Neo Monomers CnHmO2
C7H12O2
Vinyl Acetate C4H6O2 86
128
159-210 14-17%
Monomer Formula Mass % Oxygen
Methy Methacrylate C5H8O2 86
Styrene C8H8 104 0%
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NEOCAR® Technology yields extremely hydrophobic polymers
0%2%4%6%8%
10%12%14%16%
100 60 -3 -55 -65
% W
ater
Sol
ubili
ty
Styrene
BA
2-EHA
Neo monomers ~0.01%
Tg , °C of homopolymers
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NEOCAR® Technology protects the polymer backbone
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CH3
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CH2
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CH3H3C
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ACR offers a range of products to cover the entire spectrum of performance and cost
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Product Chemistry Total solids
Tg (oC) Features
NEOCAR® Latex 2300 Vinyl acetate/vinyl versatate 55 5
Interior/exterior masonry wall with excellent alkali and efflorescence resistance
NEOCAR® Latex 2535 Vinyl acetate/vinyl versatate 53.5 10 General purpose binder for high-film build
coatings with wet adhesion
NEOCAR® Acrylic 820 Vinyl versatate/acrylic 45 20 Ultra-small particle size binder for water and blush resistance
NEOCAR® Acrylic 850 Vinyl versatate/acrylic 45 50 Ultra-small particle size binder with ambient cross-linking for coatings with block and chemical resistance
ENCOR® CL36 Acrylic 49 20 Suitable for primer and topcoats; efflorescence resistance over masonry
ENCOR® 651 Acrylic 65 12 Abrasion resistance coatings for athletic surfaces
ENCOR® 657 Acrylic 58 16 Cost effective high solids acrylic binder for masonry and wall coatings
ENCOR® 7325 Styrene acrylic 46 50 Concrete sealer
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Competitive products and suggested ACR alternatives
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Competitive Product ACR Alternative The Dow Chemical Company
Rhoplex 2500 ENCOR 657, NEOCAR Latex 2300
Rhoplex CS-4000 Rhoplex AC630
NEOCAR Acrylic 820
Rhoplex ML-100, 200, 300 or 400 NEOCAR Latex 2535
Rhoplex AC261 NEOCAR Acrylic 850
Rhoplex SS4 ENCOR 651
BASF
Acronol 296D ENCOR 657, NEOCAR Latex 2300
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NEOCAR® 2300 Vinyl Versatate-Containing Latex for Cost-Effective Architectural Coatings
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NEOCAR® 2300 delivers superior cost/ performance
Value Proposition
Offers our customers the ability to formulate an extremely cost effective alkali resistant masonry paint
Product Overview
Typical end use ● Interior/exterior masonry wall coatings
Features ● Good interior/exterior durability ● Water resistance ● Good alkali and efflorescence resistance ● Zero VOC capable
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NEOCAR® 2300 offers superior durability
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100
200
300
400
500
600
Acronal296D
NeoCAR2300
ENCOR657
ENCORCL36
NeoCAR2535
Contractor Flat
Quality Flat
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b R
esis
tanc
e
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NEOCAR® 2535 Vinyl Versatate-Containing Latex for Cost-Effective Architectural Coatings
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NEOCAR® 2535 delivers inherent film build
Value Proposition
Offers our customers the ability to formulate an extremely cost effective exterior coating with inherent film build
Product Overview
Typical End Use Applications ● Exterior House Paint
– Wood, masonry and cement fiberboard ● EIFS repaint
Features ● Inherent film build ● Good exterior durability
– Grain crack and alkali resistance, color retention ● Zero VOC capable with non-VOC coalescing solvent
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Commercial Acrylic(s)
NEOCAR Latex 2535
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NEOCAR® 2535 has excellent alkali resistance
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NEOCAR® Acrylic 820 High Performance Polymer for Clear Coatings and Sealers
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NEOCAR® Acrylic 820 delivers superior blush resistance
Value Proposition
Offers our customers superior blush resistance performance versus competitive acrylic and styrene acrylics
Product Overview
Typical End Use Applications ● Architectural and Industrial usage ● Surfaces requiring outstanding blush resistance
– Wood decks, ceramic roof tiles and concrete patios ● Masonry sealers ● Clear sealers ● Semi-transparent and solid color stains
Features ● Outstanding water and blush resistance ● Zero VOC capable with non-VOC hydrophilic coalescing solvent
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20
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60
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% W
ater
Abs
orpt
ion
0.2 1 2 3 4 14 21 28
Days
NEOCAR® Acrylic 820 has significantly lower water absorption
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Conventional acrylic NEOCAR acrylic
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NEOCAR® Acrylic 820 has significantly better blush resistance
Vinyl Acrylic Acrylic NEOCAR Acrylic
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NEOCAR® Acrylic 820 superior hydrophobicity yields water beading coatings
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NEOCAR® Acrylic 820 exhibits excellent efflorescence resistance
NEOCAR Acrylic Sealer/Topcoat
Topcoat
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NEOCAR® Acrylic 850 High Performance Polymer for Clear Coatings and Sealers
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NEOCAR® Acrylic 850 delivers unparalleled performance
Value Proposition
Offers our customers the ability to formulate coatings with the superior blush, chemical and block resistance
Product Overview
Typical End Use Applications ● Architectural and industrial usage
– Surfaces requiring outstanding hardness, blush and chemical resistance - Garage floors, driveway pavers, tiles or concrete decks
● Concrete sealers
Features ● Outstanding blush resistance ● Excellent water and chemical resistance ● Outstanding hot tire pick-up resistance ● Capable of being formulated at 100 g/L VOC
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Self Crosslinking
X X
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NEOCAR® Acrylic 850 employs a unique ambient cure cross-linking mechanism
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50
100
150
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Competitive NEOCAR Acrylic
1 Day7 Days
60
MEK
Dou
ble
Rubs
This cross-linking yields films with excellent solvent resistance
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NEOCAR Acrylic 850 can enhance the appearance of stone pavers
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ENCOR® CL36 High Performance Polymer for Clear Coatings and Sealers
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ENCOR® CL36 offers broad utility
Value Proposition
Offers our customers the ability to formulate both primers and top coats for masonry substrates
Product Overview
Typical End Use Applications ● Barrier coatings
Features ● Excellent alkali and efflorescence resistance ● Flat coatings ● Good flexibility
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ENCOR® 651 All-Acrylic High Solids Latex for Athletic Surface and Architectural Coatings
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ENCOR® 651 for durable sport surfaces
Value Proposition
Offers our customers the ability to formulate coatings for sport surfaces
Product Overview
Typical End Use Applications ● Block fillers ● Barrier coatings ● Athletic surfaces (i.e. tennis courts)
Features ● Excellent alkali resistance ● Flat coatings ● Good flexibility
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ENCOR® 657 Versatile 100% Acrylic Latex for Interior, Exterior and Masonry Coatings
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ENCOR® 657 is a low cost option for a 100% acrylic binder
Value Proposition
Offers our customers the ability to formulate low cost, 100% acrylic masonry coatings
Product Overview
Typical End Use Applications ● Interior/exterior architectural paints ● Exterior wood siding stains ● Masonry paints and stains
Features ● Broad formulation latitude ● Good balance of properties
– Washability and Stain Resistance ● Outstanding alkali resistance ● Good color retention
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ENCOR® 7325 Concrete Sealer
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ENCOR® 7325 for cure and seal coatings
Value Proposition
Offers our customers the ability to formulate cure and seal coatings for concrete floors
Product Overview
Typical End Use Applications ● Concrete sealers
Features ● Sealer for Interior and Exterior Concrete ● Outstanding Water Resistance ● Non-Yellowing ● Passes ASTM C309 and C1315 for water retention
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ENCOR® 7325 meets the performance requirements of ASTM C309
Relevant test methods include ASTM C309, C156, D1308 and D1644 ● Application Rate: 200 ft2/gal
ASTM C309 test results
Test results Requirements ● Water Retention, kg/ m2 0.44 0.55, max ● Drying Time to Touch, hours ~ 1.0 4.0, max ● Nonvolatile Content, % 15.8 15.0, min
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Recap
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Today’s session was intended to provide you with a technical grounding in paint formulating and product selection for cementitous substrates Fresh concrete is a very alkaline surface and care must be exercised in the selection of raw materials and formulation of masonry coatings The three key performance tests of masonry coatings are water vapor permeability, efflorescence and alkali resistance ACR offers the broadest range of chemistries to the masonry paint market to meet a range of cost/performance requirements including: ● A variety of Acrylic latexes for use in broadwall and barrier
coatings ● NEOCAR® technology to extend the performance capabilities
of both vinyl acetate and acrylic-based latexes
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Questions? Please contact the Account Team
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Mary Chervenak [email protected]
Marlene Hernandez [email protected]
Mark Piggott [email protected]
Commercial Questions
Latin America
Commercial Questions
USA & Canada
Technical Questions
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2014 ACR Webinar Series
Next Month’s Topic: Elastomeric Coatings
Speaker: John Dockery
Title: Technical Service Chemist
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Friday June 20, 2014 @ 2:00pm ET
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Arkema Coating Resins
Thank You for Joining Us!!
See you in May!!
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