Technical Data Sheet
DRYCRYL™ DP-2903
100% Acrylic Redispersible Powder
Introduction
DRYCRYL™ DP-2903 acrylic dry polymer is a 100% acrylic, redispersible powder designed
to improve the performance of Portland cement mortars. Incorporating this powder allows
compounders to attain the dramatic improvements in adhesion, abrasion resistance, flexural
strength and exterior durability that are associated with acrylics. DRYCRYL™ DP-2903 is
supplied as a powder that can be blended directly with aggregate, cement and other formulation
aids to form convenient and cost-effective “one-pack” systems. One-component systems reduce
environmental waste (used containers) and lower shipping and packaging costs.
Typical
Applications
DRYCRYL™ DP-2903 polymer was developed for use in cementitious applications in which a
one-package dry mix is desired, such as:
• Dry mortar mixes for patching, paving toppings and masonry
• Shotcrete (dry)
• Ceramic tile thinset mortars and grouts
• Sprayable cementitious coatings
• Stuccos
• Self-leveling underlayments/overlayments
Features and
Benefits
To the end user
• Acrylic performance – excellent mechanical strengths and adhesion, excellent exterior
performance (wet and dry)
• Low water demand with good workability
• Excellent thin section toughness and adhesion
• Exceptional resistance to UV degradation
To the compounder
• Excellent storage stability (e.g., free flowing)
• Lower shipping costs
• Wide formulating latitude: compatible with commonly used additives
• No admixture container disposal costs
DRYCRYL™ DP-2903 gives compounders the ability to obtain the advanced interior and exterior
performance properties associated with all-acrylic cement modifiers, now in dry form.
Typical Physical Properties
These properties are typical but should not be considered specifications.
Appearance
Free-flowing, white powder
Polymer type
100% acrylic
Bulk density, lbs/ft3
25.0
Glass transition temperature (Tg ), °C 10
(DSC onset)
Average particle size, microns
~60
Anti-caking agent, %
~5.0
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®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
DRYCRYL™ DP-2903 / Dow Construction Chemicals
July 2010
Performance
Advantages
The key performance advantages of DRYCRYL™ DP-2903 are its improved wet and dry adhesion,
mechanical strengths and excellent weatherability. These performance advantages make
DRYCRYL™ DP-2903 polymer an excellent choice for use in exterior applications or applications
where water resistance is critical. DRYCRYL™ DP-2903 has shown excellent compatibility and
performance in fast-setting mortars.
Exterior Durability
Cement mortars made with 100% acrylic DRYCRYL™ DP-2903 are more resistant to weathering
than mortars using modifiers based on other chemistries. As is typical of 100% acrylic polymers,
DRYCRYL™ DP-2903 is highly resistant to the effects of ultraviolet radiation. More than 20 years
of exterior exposure on mortars modified with 100% acrylic dry polymers show the exceptional
performance advantages of all-acrylic cement modifiers over those of non-acrylic polymers.
Adhesion and Toughness
Mortars prepared with DRYCRYL™ DP-2903 polymer show excellent adhesion, as well as thin
section toughness. Excellent adhesion, both wet and dry, is observed on a variety of substances,
including concrete, wood, metal, gypsum sheathing, cement board, masonry and polystyrene
insulation board.
Workability
Cement mortars modified with DRYCRYL™ DP-2903 polymer display excellent workability. Mortars
modified with DRYCRYL™ DP-2903 require less water than mortars modified with vinyl acetate
copolymers. Additionally, mortars modified with DRYCRYL™ DP-2903 exhibit excellent pot life,
retaining smooth consistency longer without a false set, even at elevated temperatures.
Comparative
Performance Data
Data are available comparing the performance of mortars modified with DRYCRYL™ DP-2903
polymer with those of unmodified mortars and mortars modified with a variety of other dry polymers.
Storage and
Handling
DRYCRYL™ DP-2903 is a thermoplastic polymer and ideally should be stored at room
temperature (circa 70°F). Prolonged storage at temperatures above 100°F should be avoided.
Like most other dry polymers, care should be taken to limit stacking of pallets to avoid compaction.
This is especially critical in warm climates.
Test Methods
Details about test methods used to evaluate the performance of DRYCRYL™ DP-2903 polymer
are available from your local Dow representative.
Formulation
Guidelines
Your local Dow representative can provide general information regarding cement formulation
techniques as well as more specific information on formulating with DRYCRYL™ DP-2903 dry
polymer cement modifier.
Safe Handling
Information
Toxicity screening tests conducted on closely related analogs of DRYCYRL™ DP-2903
suggest that this product should be essentially nontoxic by single acute oral or dermal
exposure and that it may also be a mild to moderate skin and eye irritant. Components of
cement used in conjunction with DRYCRYL™ DP-2903 may also possess significant skin
and eye irritation potential.
As is typical when working with powders, ensure that adequate respiratory protection
measures are taken. Please refer to the safety data sheet for more specific respiratory
protection measures.
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®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
DRYCRYL™ DP-2903 / Dow Construction Chemicals
July 2010
Product
Stewardship
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.
Customer Notice
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.
Disclaimer
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, the Customer is responsible for determining whether products and
the information in this document are appropriate for the Customer’s use and for ensuring that
the Customer’s workplace and disposal practices are in compliance with applicable laws and
other governmental 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.
The Dow Chemical Company
www.dowconstructionchemicals.com
215-592-3000
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®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
DRYCRYL™ DP-2903 / Dow Construction Chemicals
July 2010
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®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
DRYCRYL™ DP-2903 / Dow Construction Chemicals
Form No. 832-00098-0710P&M
July 2010