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OPAQUE POLYMER
Hollow Sphere Pigment
EN-TECH POLYMER CO.,LTD.
Opaque Polymer – SHP Series
The Difference is in the paint
SHP opaque polymer is a unique hiding additive that enables paint
manufacturers to save money and improve performances.
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What’s New
SHP SERIES opaque polymer significantly expands the boundaries of light-scattering
technology, providing the most efficient dry hiding in interior and exterior coatings.
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Paint formulators can now…
Significantly increase light-scattering efficiency while maintaining paint performance,
or
Realize greater cost savings while providing equal hiding property.
EN-TECH POLYMER CO.,LTD.
Opaque Polymer – SHP Series
The Difference is in the paint
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Product Overview
SHP SERIES? Opaque polymers are non-film-forming synthetic pigments engineered to
provide dry hiding in water-based coatings.
They consist of spherical styrene/acrylic beads supplied as emulsions. In wet paints the
beads are filled with water. As the paints dry, water permanently diffuses from the center
of the beads and is replaced by air, resulting in discrete encapsulated air voids uniformly
dispersed throughout the dry paint film.
The encapsulated air voids provide optimal hiding when the paint film dries and light is
scattered as it passes from the exterior of the beads to the interior micro voids.
Properties
The use of SHP SERIES opaque polymer can have a beneficial impact on the performance
properties of both interior and exterior paints. Substituting opaque polymer for some of the
titanium dioxide and pigment extender in an interior paint makes it less vulnerable to
damage from cleaning (see Interior Scrub Panel).
In an exterior paint, on the other hand, exchanging opaque polymer for a portion of
nondurable pigment extender such as calcium carbonate can improve durability
(see Exterior Exposure Panel).
EN-TECH POLYMER CO.,LTD.
Opaque Polymer – SHP Series
The Difference is in the paint
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Interior Scrub Panel
The use of SHP SERIES? Opaque polymer in paints formulated above the critical pigment
volume content (CPVC) level significantly improves their wash ability.
The panel above contains two versions of a high-PVC paint, one conventionally extended
(left), the other made with SHP SERIES opaque polymer (right).
When cheesecloth dipped in either water or a household cleaner is rubbed back and forth
across the panel to simulate washing, the conventionally pigmented paint is abraded; its
SHP SERIES opaque polymer counterpart remains intact.
Interior Scrub Panel
NON-SHP
CONTROL
SHP-60
EN-TECH POLYMER CO.,LTD.
Opaque Polymer – SHP Series
The Difference is in the paint
The Difference is in the paint
Exterior Exposure Panel
The use of SHP SERIES? Opaque polymer can significantly improve paint durability in
cases where the extenders are not durable.
Even in paints containing durable extenders,
SHP SERIES opaque polymer can help improve durability.
The panels above contain conventionally pigmented (left side) and opaque polymer (right side)
versions of a flat paint.
The formulations on the top panel contain Minex 4 nepheline syenite, a durable extender;
those on the bottom, a clay.
The opaque polymer version on the bottom panel retains its color significantly better because
the opaque polymer is more durable than the clay it replaced.
Even in the more durable
formulations on the top panel, the paint containing opaque polymer shows better color
retention.
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EN-TECH POLYMER CO.,LTD.
Opaque Polymer – SHP
Hollow Sphere Pigment for Water Based Coatings
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SHP consists of a styrene-acrylic copolymer emulsion, providing non-pigment
hiding of emulsion paints and related systems.
The emulsion particle is a non-film forming spherical bead consisting of a hard
Polystyrene/Acrylic shell and a hollow core.
This core is filled with water in the emulsion state and in the wet paint state.
However, as the paint dries, the water diffuses out of core and is replaced by an
air void, which serves as an excellent light scattering media.
EN-TECH POLYMER CO.,LTD.
Opaque Polymer – SHP
Specification
Hollow Sphere Pigment for Water Based Coatings
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Specification
Unit
Chemical Nature
Lower limit
SHP-40
Upper limit
Lower limit
Upper limit
Aqueous anionic dispersion of copolymer of acrylic, styrene.
This product
does not contain any plasticizers or alkylphenoxy ethylene oxide surfactants.
Physical Form
Non-volatile Fraction
SHP-60
Milky White Liquid
%
PH (at 25℃)
Milky White Liquid
28.5
30.5
36.5
38.5
9.0
10.5
9.0
10.5
Viscosity (Rvt#2, 50rpm)
cps
0
500
0
500
Specific Gravity (at 25℃)
g/cm
1.01
1.05
1.01
1.05
Average Particle Size
nm
500
700
350
450
Ionic Charge
Hiding Power* (contrast ratio)
Anionic
0.70
Anionic
0.85
0.70
0.85
* Hiding Power is determined through tests of sample coating systems containing only Opaque
polymer SHP as the whitening pigment and binder.(SHP : binder = 3 : 7 on solid base, PWC=30%)
Mixed composition is drawn down 8mil Bird Applicator on Hiding Power test paper.
EN-TECH POLYMER CO.,LTD.
Opaque Polymer SHP-100
Technical Specification
Hollow Sphere Pigment for Paint
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Chemical Nature : Aqueous anionic dispersion of copolymer of acrylic, styrene.
Physical form : Milky White Liquid
Storage :
Opaque polymer SHP-100 has a shelf life of 12 months.
The air in the headspace of bulk storage tanks must be kept saturated with water vapor at all times.
Technical Specification
Non-volatile fraction
(at150°C/1hr)
Unit
Low limit
Upper limit
%
26.0
27.0
8.5
10.0
pH(at 25°C)
Viscosity(Rvt#2, 50rpm)
cps
0
400
Specific Gravity(at 25°C)
g/cm
1.01
1.05
Average Particle size
nm
950
1250
Ionic charge
Hiding power(contrast ratio)*
Anionic
0.70
0.85
* Hiding Power is determined through tests of sample coating systems containing only Opaque polymer SHP as the
whitening pigment and binder.(SHP : binder = 3 : 7 on solid base, PWC=30%) Mixed composition is drawn down 8mil
Bird Applicator on Hiding Power test paper.
EN-TECH POLYMER CO.,LTD.
Contacts

EN-TECH POLYMER CO., LTD.
HEAD OFFIC
: RM209, JEIL PLAZA, IMAE DONG 131-1, BUNDANG KU,
SEONG NAM CITY, KYUNGGI DO, 463-806, SOUTH KOREA
Tel : 82-31-706-7452
Fax : 82-31-706-7453
HTTP://www.opaquepolymer.co.kr
EN-TECH POLMER CO.,LTD.