Technical Data Sheet
RHOPLEX™ LA-501
100% Acrylic Latex Polymer
Introduction
RHOPLEX™ LA-501 is a high-solids, 100% acrylic latex polymer developed
to offer excellent bulk water resistance and optimal vapor permeability when
formulated into a water-resistive and/or air barrier coating. Optimized RHOPLEX
LA-501 formulations exhibit excellent weatherability and mechanical properties
when applied on a wide variety of substrates.
Advantages
Coatings based on RHOPLEX LA-501 exhibit the following advantages:
• Bulk water resistance
• Optimal vapor permeability
• Excellent adhesion over numerous substrates, including exterior glass-faced
gypsum board, wood, masonry, polyurethane foam and others
• High elongation and excellent crack bridging properties
• Improved nail sealability versus housewrap
• Excellent UV resistance
• Easy application by spray, brush or roller
• Low toxicity and odor
• Simple clean-up with water
Typical Physical Properties
These properties are typical but should not be considered specifications.
Solids content, %
55
pH
9.3
Brookfield viscosity, cPs, max.
200
Density, wet, lbs/gal
8.7
Glass transition temperature (Tg), onset, ºC
-40.0
Minimum film formation temperature (MFFT), ºC
0.0
Storage stability
Protect from freezing
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®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
RHOPLEX™ LA-501/Dow Construction Chemicals
November 2012
Starting Point Formulation for Liquid-Applied Coating Based on RHOPLEX™ LA-501 Polymer
Material
% by Weight
RHOPLEX™ LA-501 Acrylic Polymer
50.01
BYK-022
0.44
Propylene Glycol
1.17
WALOCEL™ XM 40000 PV
0.07
TAMOL™ 851 0.94
TRITON™ X-405 0.73
TRITON CF-10 0.73
Water
14.89
OMYACARB 12 23.03
Kadox 915 5.83
Aquatrend Phthalo Blue 878 7215
0.19
Aqueous Ammonia (28%)
0.20
ROCIMA™ 200 0.56
ACRYSOL™ TT-615 1.21
Total
100.00
Material
Function
Supplier
RHOPLEX™ LA-501 Acrylic Polymer
Binder
Dow
BYK-022
Defoamer
BYK
WALOCEL™ XM 40000 PV
Thickener
Dow
TAMOL™ 851 Dispersant
Dow
TRITON™ X-405 Surfactant
Dow
TRITON CF-1
Surfactant
Dow
OMYACARB 12 Filler
Omya
Kadox 915 Functional Pigment
The Cary Company
Aquatrend Phthalo Blue 878 7215
Pigment
Evonik
ROCIMA™ 200 Biocide
Dow
ACRYSOL™ TT-615 Rheology Modifier
Dow
Mechanical Properties of Coating Based on RHOPLEX™ LA-501 Polymer
Test Parameter(1)
Measurement
Test Method
Tensile strength, MPa, max.
1.53
ASTM D412, Die C
Elongation at max. strength, %
230
ASTM D412, Die C
Perms
12.17
ASTM E96, Water Method
Perms after rain
10.7
ASTM E96, Water Method
Tensile bond adhesion, MPa
ASTM C297
OSB
18.55 (±3.5) psi /0.13 (±0.02)
STYROFOAM™ Brand XPS
43 (±6) psi /0.30 (±0.04)
GP DensGlass Gold
16.33 (±1.0) psi /0.11 (± 0.01)
All testing on 20 wet mil films, following seven-day cure at 70°F/55% relative humidity.
(1)
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®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
RHOPLEX™ LA-501/Dow Construction Chemicals
November 2012
Handling Precautions
Before using this product, consult the Material Safety Data Sheet (MSDS)/safety data sheet
(SDS) for details on product hazards, recommended handling precautions and product
storage.
Storage
Store products in tightly closed original containers at temperatures recommended on the
product label.
Disposal
Considerations
Dispose in accordance with all local, state (provincial) and federal regulations. Empty containers
may contain hazardous residues. This material and its container must be disposed in a safe and
legal manner.
It is the user’s responsibility to verify that treatment and disposal procedures comply with local, state
(provincial) and federal regulations. Contact your Dow technical representative for more information.
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, 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.
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™ LA-501/Dow Construction Chemicals
Form No. 832-03037-1112BBI