ROPAQUE® HP-1096 The All-Purpose Pigment

Table of Contents

Ropaque® HP-1096 opaque polymer is a non-film-forming synthetic pigment

engineered to improve the economics of waterborne coatings.

Ropaque HP-1096 is a polymer with a large void fraction designed to be used in

coatings where the pigment volume concentration is in the range of 50PVC and higher.

Ropaque HP-1096 contributes similar volume solids to ROPAQUE OP-96, but at

lower weight solids allowing lower raw material cost. This allows formulators to gain

additional savings in paints above the critical pigment volume concentration and at

very low titanium dioxide levels, by further increasing the total pigment volume

concentration over that of Ropaque OP-96 based paints.

Ropaque HP-1096 is not recommended at PVC's below 50 as its relatively large

particle size may decrease gloss and sheen levels. At this lower PVC's Ropaque Ultra is recommended.

Reformulation Protocols

Ropaque HP-1096 is designed for optimum usage closed to above critical pigment

volume concentration (CPVC) water borne paints having Titanium Dioxide levels below 12% pigment volume concentration (PVC).

Reformulation of paints not previously containing ROPAQUE or other

competitive Opaque Polymers :

First calculate the %PVC of pigment and extenders in your formulation, the Total

%PVC should be within the range of 50 to 85%.

TIO2% PVC

For TiO2% PVC's greater than 6%, rev=move 1/2 of the TiO2% PVC. If TiO2 level is below 6% PVC, then remove 1 1/2 % PVC units of TiO2.

High Oil Adsorption Extender

For high oil absorption. extenders such as Kaolinite clays and alumino silicates, maintain an equal level of these materials in the reformulation.

HP-1096 % PVC

Add 8 to 12% PVC of Ropaque HP-1096 to the reformulation

Total % PVC

Increase the total % PVC of the reformulated paint by 5% PVC units by adjusting the low O.A. extender such as calcium carbonate, chlorite, or silica.

Maintain the volume solids of the reformulation equal/higher to that of the original.

Coalescent should be added on the same basis as recommended for the binder used,

however, the amount of Ropaque HP-1096 added should be included in the calculation.

Reformulation of Paints Containing Ropaque OP-96

Replace Ropaque OP-96 on an equal weight basis or, for lowest cost reformulation, follow guidelines below.

First calculate the % PVC of pigment and extenders in your formulation the Total % PVC should be within the range of 50 to 85%.

TiO2 % PVC

Decrease the level of TiO2 by 0.5% PVC units. If the original level of TiO2 is greater

than 12 % PVC, the Ropaque HP-1096 reformulation may be more expensive than

the OP-62 formulation.

High Oil Adsorption Extender

For high oil absorption extenders such as Kaolinite clays and alumino silicates, increase the combined level of these materials in the reformulation by 2 to 3% PVC units.

HP-1096 % PVC

Increase the level of ROPAQUE OPAQUE POLYMER in the reformulation by 4% PVC units.

Total % PVC

Increase the total % PVC of the reformulated paint by 2.5 % PVC units by adjusting the low oil absorption extender such as calcium carbonate, chlorite, or silica.

Maintain the volume solids of the reformulation equal/higher to that of the original.

Coalescent level may be increased to further improve scrub resistance and film formation.

FEATURES AND ADVANTAGES

Maintain properties at lower raw material cost and hence increase profitability Improved properties at little or no cost increase Improved dirt resistance in exterior coatings Improved interior washability Better wet-to-dry color matching Color consistency at every tinting Improved block resistance for interior coatings

TYPICAL PHYSICAL PROPERTIES (These properties are typical and should not be considered

specifications.)

Ropaque® HP-1096

Percent Solids

Weight

28 - 29

pH

8-8.7

Density, lb/gal

Wet

8.55

Bulking Value, gal/lb

Wet

0.1170

Viscosity, cP

80 - 100

Average Particle Size,

Microns

0.55

We recommend Ropaque HP-1096 for exteriorand Interior formulations.

Interactions with Other Paint Ingredients

Ropaque HP-1096 hiding properties depends on the integrity of the hollow sphere in the paint film. As with all polymers, polymers can be affected by solvents.

White Spirits and Plasticizers

Avoid the use of white spirits and plasticizing solvents. The aromatic contents of white

spirits and many monomeric plasticizers have similar solubility parameters . This can

soften the polymer shell and cause the collapse of the spheres during film formation.

Alcohol-based coalescents and glycols do not affect Ropaque HP-1096, however,

during paint preparation, they should not be added in concentrated form to Ropaque

HP-1096 to avoid flocculation.

Handling and Storage Information

Some special storage and handling techniques should be observed for Ropaque

Opaque Polymers.

Intermittent agitation during bulk storage (approximately 15 minutes every 12 hours)

is recommended for controlling sedimentation. A two-inch recirculating closed loop,

using a sliding vane design, diaphragm type, or other low-shear pump to transfer

material, is preferred to a top-entering agitator. The recirculating loop should

discharge below the liquid level of the polymer to avoid foam generation.

As with all our emulsions, do not use mild steel, iron, copper, brass, bronze,

aluminum, or zinc-coated lines, valves, plugs, tanks, etc., in the transfer and storage

of opaque polymers. Polymer accumulates on such surfaces, starting a nucleating

process that results in extensive polymer fouling.

Avoid using surfaces that enable the polymer to wick out, as the wicking process

causes the development of nodules of hard material that grow out from these areas

and eventually drop into the polymer. Examples of materials that could result in

wicking are old fiberglass tanks with exposed glass fibers, a coated tank with part of

the coating broken, and drums with pinholes in the lining.

Exposure of opaque polymer to high shear will cause mechanical breakdown and

polymer buildup. Examples of high shear situations include pumping through small mesh filters at high flow rates and use of pumps with close tolerances.

When filtering with absorbent elements, pre-wetting the element reduces binding.

Cartridge filters and bag filters with needle-punched filter bags are examples of filters

with absorbent elements.

Shared transfer lines and other components should be flushed with water before they

are used for opaque polymers. Contact with concentrated glycols, surfactants, and acid

materials, could cause gelling. Compatibility with all new materials should be checked

routinely.

Protect from freezing!

Avoid free fall.

HEALTH AND SAFETY INFORMATION

Material Safety Data Sheets

Opaque polymer is non-toxic in single acute oral, dermal, and inhalation exposure tests. Without proper safety precautions, it can be a mild skin and eye irritant.

Dow Material Safety Data Sheets (MSDS) contain pertinent information that you may

need to protect your employees and customers against any known health or safety

hazards associated with our products.

Under the OSHA Hazard Communication Standard, workers must have access to and

understand MSDS on all hazardous substances to which they are exposed. Thus, it is

important that you provide appropriate training and information to your employees and

make sure they have available to them MSDS on any hazardous products in their

workplace.

Dow Company sends MSDS on non-OSHA hazardous as well as OSHA-hazardous

products to its customers upon initial shipment (including samples) of all its products

(whether or not they are considered OSHA-hazardous). If you do not have access to

one of these MSDS, please contact your local

Dow representative for an additional copy.

Updated MSDS are sent upon revision to all customers of record.

MSDS should be obtained from your suppliers of other materials recommended in this

bulletin.

Dow is a member of the Chemical Manufacturers Association and is committed to CMA’s Responsible Care® Program.

ROPAQUE is a trademark of Dow Company, or of its subsidiaries or affiliates and is intended to designate goods marketed in North and South America; the same goods may be marketed in other countries, generally under other Company trademark designations.

Suggestions for use of our products are based on information we believe to be reliable. They are offered in good faith, but without guarantee, as conditions and methods of use of our products are beyond our control. We recommend that the prospective user determine the suitability of our materials and suggestions before adopting them on a commercial scale. None of these suggestions should be construed as recommending use of our products in violation of any patent or as permission or license to use any patents of Dow Company.

Dow Company maintains Material Safety Data Sheets (MSDS) on all of its products described in this publication. As the MSDS contain pertinent information that you may need to protect your employees and customers against any known health or safety hazards associated with our products, we recommend that you obtain copies of these documents for each product before its use in your facilities. We also suggest that you contact your suppliers of other materials recommended for use with our products for appropriate health and safety precautions prior to their use.