Technical Data Sheet
RHOPLEX™ CS-3800
Styrene-Acrylic Copolymer
Introduction
RHOPLEX™ CS-3800 styrene-acrylic copolymer is designed for use in concrete curing membrane
formulations. It provides excellent water retention performance in formulations prepared at low
solids level (20% by weight) and a low coalescent level. RHOPLEX™ CS-3800 offers rapid
tack-free time in both indoor and outdoor applications. Although optimized for performance in
concrete curing membranes, this copolymer also performs well in concrete sealing applications.
Advantages
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Water-based
Rapid tack time
Excellent water retention
Low VOC levels in formulated product
Stain and chemical resistance (as a sealer)
Adhesion to concrete substrate (as a sealer)
Abrasion resistance (as a sealer)
Typical Physical Properties
These properties are typical but should not be considered specifications.
Solids content, % by weight
44.5-45.5
Brookfield viscosity, cPs
200-2,000
Density wet, lbs/gal (g/ml)
8.60 (1.03)
Density dry, lbs/gal (g/ml)
8.93 (1.07)
pH
6.5 – 7.5
Glass Transition Temperature (Tg), °C 40
(DSC, midpoint)
Minimum film formation 45.0
temperature (MFFT), °C
Particle size, micron
0.11
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®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
RHOPLEX™ CS-3800 / Dow Construction Chemicals
July 2010
Performance
Features
The following characteristics were identified in Dow laboratories for concrete curing membranes
formulated with the RHOPLEX™ CS-3800 copolymer:
Excellent Water Retention
Concrete curing membranes formulated using RHOPLEX™ CS-3800 provide excellent performance in the water retention section of ASTM C309 (Liquid Membrane-Forming Compounds for
Curing Concrete). The excellent performance of RHOPLEX™ CS-3800 is observed in formulations
prepared at a low solids level (20% by weight) and a low coalescent level (16% by weight, based
on polymer solids) tested under the harshest (earliest) conditioning time allowed by the test
method and applied at a 200 ft2/gal coverage rate.
Low Coalescent Demand
Excellent water retention results are obtained in a concrete curing membrane formulation using
16% propylene glycol phenyl ether on RHOPLEX™ CS-3800 copolymer solids, a lower level than
is needed with other commercially available emulsion polymers, resulting in lower formulated
product VOC.
Rapid Tack-free Time
RHOPLEX™ CS-3800 copolymer is designed to give rapid tack-free time in both indoor and
outdoor applications.
Good Concrete Sealer Performance
Although optimized for performance in concrete curing membrane formulations, RHOPLEX™
CS-3800 also can be formulated into and performs well as a concrete sealer when evaluated for
stain and chemical resistance, adhesion to concrete substrate and abrasion resistance.
Formulation
Guidelines
Contact your local Dow representative for suggested starting point formulations and related information.
Product Specifications
Appearance
Solids content, % by weight
Brookfield viscosity at 25°C, mPa•s
LV spindle #3, 60 rpm
pH
Gel particle on 150 micron, ppm
Gel particle on 45 micron, ppm
Specification date: July 13, 2006
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Off-white fluid, free of coagulated gum and visible impurity
44.5-45.5
100-1,100 CPO
6.50 – 7.50
0 – 50
0 – 100
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
RHOPLEX™ CS-3800 / Dow Construction Chemicals
July 2010
Product
Stewardship
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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
RHOPLEX™ CS-3800 / Dow Construction Chemicals
Form No. 832-00114-0710P&M
July 2010