Next generation
environmentally advanced
binder
Formulating two-component cementitious
waterproofi ng membranes
PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer
Dow Construction Chemicals
Lon g-ter m protecti on
of build in g st ructur es
Version March 2014
Dow Construction Chemicals
– PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer2
Introducing PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer
– Dow’s latest generation of binders speciallydesigned to support durable waterproofi ng
– Off ering high fl exibility and elongationas well as tensile strength
– Supporting long-term protection of building structures
– Helping to raise constructionand environmental quality
A watertight approach to polymer developmentWhether it’s protecting concrete and masonry substrates from wet weather conditions, surface water splash, ground moisture ingress or the destructive action of soluble salts, responsible building designers and owners want to ensure the best possible defences.
Highly fl exible cementitious waterproofi ng membranes, applied with a brush, roller or spray cure to form a fl exible coating preventing water penetration and providing crack-bridging.
Key to the performance capabilities of the fi nal membrane are the technical characteristics of the polymer which must provide essential properties to the waterproofi ng mortar including adhesion at the mortar-substrate interface and act as an eff ective binder to hold together fi ller particles.
Performance requirementsCementitious membranes are expected to off er excellent resistance to water and long-term weathering, even when permanently exposed. High water vapour permeability helps avoiding issues such as blistering, and high toughness and scratch resistance off er durability. The systems must be easy to apply, even on complex, uneven surface shapes, and result in fully-bonded surfaces with no joints.
Such performance benefi ts have led to their widespread use in applications such as waterproofi ng wet areas, basement walls, swimming pools, balconies, facades terraces and waste-water drains. Flexible systems are also used as protective surface-coatings for concrete structures.
The importance of polymer choicePolymers act as the binder to bring adhesion, fl exibility and water resistance to waterproofi ng membranes – which are core requirements for such systems. Eff ective polymers must therefore off er: – Good fi lm formation behaviour: suitable emulsion
polymers defl occulate particles which results in a tight, non-porous, fi lm
– Stability in cement-based mixtures – Wet mortar properties (ease of application) – Water and alkali resistance – A good balance between fl exibility and tensile strength – Low glass transition temperature (Tg)
Today’s market also demands materials with a good environmental profi le alongside eff ective product performance.
Critical requirements of two-component cementitious
waterproofi ng membranes:
– Flexibility: crack bridging
– Water impermeability: water tightness
– Adhesion to concrete
– Low water absorption
3®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow.
PRIMAL™ AS-8012 Acrylic EmulsionPolymer – performance features and benefi tsPRIMAL™ AS-8012 Acrylic Emulsion Polymer has been designed to off er manufacturers of two-component, cementitious waterproofi ng systems an excellent balance of performance features and mechanical properties.
This next generation polymer imparts high fl exibility, elongation and excellent crack-bridging ability.PRIMAL™ AS-8012 also helps the formulation of membranes with market-leading environmental performance and compatibility with key construction standards, including potable water applications.
Supporting standardsSelecting the right polymer is vital in the production of qualifi ed waterproofi ng materials that can meet key standards in the sector.
European standard EN 14891-2007: covering liquid applied water impermeable products for use beneath ceramic tiling bonded with adhesives PRIMAL™ AS-8012 has been designed to help achieve required performance standards in classes O (external application, crack-bridging capability at low temperatures) and P (swimming pool application, resistant to contact with chlorinated water).
Supporting potable water certifi cationA sample two-component, cementitious, fl exiblewaterproofi ng membrane containing PRIMAL™ AS-8012 wascertifi ed as compliant with BS 6920: Part 2: 2000 “Suitabilityof non-metallic products for use in contact with waterintended for human consumption with regard to their eff ecton the quality of the water” (including high temperature tests up to 50°C in accordance with BS 6920: Part 3: 2000).
Formulation recommendations and a BS 6920: Part 2 compliance letter are available in order to help producers meet regulatory requirements.
Environmental performancePRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer is APEO-free 1) and formaldehyde-free 2), and has very low Volatile Organic Content (VOC), helping manufacturers to fulfi l required product standards without compromising on their commitment to the environment.
Production and packagingPRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer is produced at Dow’s expanded manufacturing site in the Jebel Ali Free Zone (JAFZA), a state-of-the-art facility producing speciality products. The product is available in drums and in bulk.
For more information on how you could benefi t from PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer in your two-component, cementitious, fl exible waterproofi ng systems, contact your local Dow sales representative or visit www.dowcc.com.
1) APEO is not intentionally added and is not knowingly introduced from another raw material
2) Made without formaldehyde or formaldehyde-generating materials and does not release formaldehyde under normal operating conditions. Dow however does not routinely analyze PRIMAL™ AS-8012 for
formaldehyde or any other substances that are not listed in the Safety Data Sheet or Sales Specification
Features Benefi ts
ü Balanced mechanical
properties
ü Imparts high tensile strength as well as
elongation
ü Tailored polymer design ü Good water and alkali resistance
ü Specifi cally designed
for waterproof coating
ü Supports formulation of a fi nal product
with excellent impermeability and crack
bridging performance
ü Excellent powder
compatibility
ü Improved formulation stability and
workability compared to previous polymers
Please note that the values shown are typical values for your guidance. They are not to be taken as
specifications and are subject to certain variability. Please consult the sales specifications for details.
Typical Properties
Appearance Milky White
Polymer Type Styrene acrylic
Solid, by weight, % 56
pH 6
MFFT, °C <�0
Tg -�8
Viscosity (LV_S3; 30rpm; 25°C) <�1100
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P.O. Box 7893, Dubai
United Arab Emirates
Phone: +971 4 4537 000
Fax: +971 4 4537 117
Email: [email protected]
For more information please
send your email to:
Or consult our web site
www.dowcc.com
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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
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Form No. 840-02501-0314
Version March 2014
Dow Southern Africa (Pty) Ltd
P.O. Box 2434,
New Germany, Kwa-Zulu Natal,
South Africa, 3620
Phone: +27 31716 5925
Mobile: +27 82 412 68 68
Email: [email protected]
®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow.
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