SYNOXOLTM

BEPD / BEPD70L

Aesthetically fastHigh performance diolfor polyester resins
in powder coatings
BLOOM
RESISTANCE

FAST
CURE

UV
RESISTANCEKEEP OEM PRODUCTION
LINES RUNNING

Meeting the needs of the whole value chainSYNOXOLTM
BEPD

Polyester Resin
Manufacturer

Powder Coating
Manufacturer

Architectural
ACE
General Industrial

In today’s ever changing architectural and industrial construction
landscape, the requirements for the quality, durability, sustainability
and aesthetics of products are becoming more demanding.
For most OEM plants and powder coating lines, thismeans that cost pressure and the requirement for fasterproduct delivery cycles are increasing.

1

Superdurable UV performance forarchitectural and industrial applications

Synthomer’s premium glycol brand, SYNOXOL BEPD,
delivers on such industry requirements by offering
polyester resin producers a robust glycol solution whichallows for the design of UV resistant, bloom-free and fastcuring powder coatings.

2

Bloom resistance for outdoor exposed
powder coatings cured with TGIC and HAA

3Reactivity increase for HAA cured
polyester resins and powder coatings

TM02

Maximization of life time for powder
coated assets

Elimination of time-consuming andcostly cleaning process after cure

Productivity increase leading to total
production cost reduction for powder
coating lines and OEM plants

TAKE CARE IN THE SUN
Superdurable UV Performance
Renowned ACE equipment producers, automotive manufacturers, and industrial
and architectural sectors require high UV durability as this is an important value
perception on their finished products.
UV durability is assessed by utilizing natural weathering
performance tests such as South Florida outdoor exposure
or accelerated weathering tests which use Xenon Arcas the light source. Other accelerated weathering tests
that utilize UVA and UVB light sources are unable to mimic
real life sun exposure; therefore they run the risk of giving
false positive or false negative results on powder coating
weathering performance.

South Florida Outdoor Exposure
SYNOXOLTM BEPD meets superdurable UV performancefor polyester resins in powder coatings. It has been
rigorously tested in South Florida outdoor exposure
over 3 years as part of a polyester resin system cured
with HAA (93:7). Outstanding results as per Qualicoat
Class 2 performance for architectural powder coatings
were achieved.

03

Gloss retention over 3 years - South Florida, 5º exposure angle
Gloss retention / %11010090807060
Superdurable standard (>50% gloss retention after 3 years)
5040
BEPD modified 15 min @ 160ºC

30

BEPD modified 10 min @ 180ºC

20

NPG Coated 15 min @ 160ºC

10NPG Coated 10 min @ 180ºC0024681012141618202224262830

32343638

40

Exposure time / months

South Florida Outdoor Exposure over 3 years - gloss retention % for powder coated panels at 5º angle facing the sunThe graph above shows that 50 mol% NPG replacementwith SYNOXOLTM BEPD delivers superdurable UVperformance. This superdurable standard can also
be achieved with <50 mol% NPG replacement (93:7PES:HAA high gloss).

04

ExposuretimeQualicoat
Class 2SYNOXOLTMBEPD

After 12 months

≥75%

≥98%

After 24 months

≥60%

≥79%

After 36 months

≥50%

≥61%

LITTLE IS BIG

Bloom Resistance Without a Compromise
The presence of neopentyl glycol (NPG) with terephthalic acid (TPA) in polyester resins results in blooming when apowder coating is cured at low temperatures, particularly below 180ºC (356ºF). The risk of blooming is higher as themetal thickness of substrates increases; this is because minimum metal peak temperatures may never reach the oventemperature. OEM producers try to address this problem by increasing oven temperatures or cure times, which means
extra energy cost and prolonged production times. Sometimes low temperature cure powder coatings are considered tosolve the problem; however this, again, would represent a more expensive material cost.
Polyester resins that contain SYNOXOLTM BEPD in their glycol blend solve the blooming issue more economicallyby reducing the amount of crystalline NPG-TPA cyclomer formation that settle onto coated surfaces during thecure cycle; only small amounts of SYNOXOLTM BEPD make a big difference (~5% w/w NPG replacement).

05

BEPD

PIA

Cost

Bloom resistance

06

TMP

PIA

UV Resistance

TMP

Flexibility

Bloom resistance

MEG/DEG

TMP

BEPD

MEG/DEG

BEPD

PIA

MEG/DEG

Cost

Cost

Flexibility

UV Resistance1

Allows formulation of bloom free exterior grade
powder coatings

2Replace as little as 5 weight % of NPGwith SYNOXOLTM BEPD

3Implement without a new polymer registration
or CAS notification

No compromise on flexibility, UV
resistance or glass transition temperature

Simple resin modification withoutcomplications

No more than 2 weight % of total resin
formulation change

POWER YOURPRODUCTIVITY
Adipic acid (ADA) is typically the sole monomer used to modify the viscosity of exterior grade polyester resins due to its
suitability for outdoor exposure. However, this comes at the expense of increased gel times as ADA retards the reactivity ofpolyester / β-hydroxyalkylamide (HAA) cure chemisty, leading to powder coating cure times of 15 minutes at 180ºC (356ºF).
Partially replacing neopentyl glycol (NPG) with SYNOXOLTM BEPD enables coating manufacturers to swap all ADA content
of the polyester resin for isophthalic acid (PIA). The result is a polyester/HAA cure chemistry with low viscosity, high glasstransition temperature and 3 times faster cure speeds (5 minutes at 180ºC / 356ºF).
Use polyester powder coatings that contain SYNOXOLTM BEPD within its resin structure and watch the product delivery cycleof OEM plants get faster. Ability to cure for 5 min, instead of 15 min, at 180ºC improves productivity by up to 3 times, resulting
in a significant reduction in energy costs per manufactured item.

+ADA+NPGHAA180ºC

15356ºF

MINS+

PIA

NPG /SYNOXOLTM BEPD

+180ºC

5HAA356ºFMINS

MEK resistance
Number of double rubs to film failure
200
180Control
BEPD b1160

BEPD b2
140120
Minimum number of double rubs required
10080
60
40
2000

1

234567891011121314

15Cure time at 180ºC / min07

Leading in emulsions
and speciality polymersSynthomer is one of the world’s leading suppliers ofemulsion and speciality polymers supporting leadership
positions in many market segments including coatings,construction, technical textiles, adhesives, paper andsynthetic latex gloves. The company has its Head Office inLondon (UK) and provides customer focused services fromoperational centres in Cleveland (US), Harlow (UK), Marl(Germany), Kuala Lumpur (Malaysia), Shanghai (China) andDubai (UAE).

In April 2020, we acquired OMNOVA Solutions Inc., aUS-based speciality chemical company. The acquisitionof this highly complementary business extends ourgeographic reach, particularly in North America and Asia,and expands our global platform. Synthomer is able toserve through a strong network of local technical service
and sales branches, supported by regional application
development and production in our key markets. We deliver
the right formula, globally, individually.

This information or data including any advice or recommendation(s) provided by us (collectively “Information”) are not intended to, nor do they, constitute professional advice orservices. Information is provided only as of the date hereof on an “AS IS” and “AS AVAILABLE” basis and we do not warrant the accuracy, timeliness or completeness of theInformation. To the maximum extent permitted by applicable law, Synthomer disclaims (i) all implied warranties, including as to continued production, fitness for purpose,
non-infringement and merchantability; (ii) all liability arising out of the application or use of any product (including infringement of third party intellectual property rights); and (iii) all liability,
including without limitation, for special, indirect or consequential losses.
Any Information concerning any possible use or application of Synthomer products is given by us in good faith and it is entirely for the recipient to satisfy itself fully as to the suitabilityof Synthomer products for any particular purpose. Synthomer products are sold in accordance with Synthomer’s standard terms and conditions of sale which are available fromwww.synthomer.com/tc.
Synthomer owns all right, title and interest in the Information and all other intellectual property rights and data associated with this information without limitation. All trademarks andlogos are the property of Synthomer. Copyright © 2020 Synthomer, all rights reserved.

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Version: 1. December 202006