Page 38 - Plastcs News August 2017

FEATurES
2% EV-AQ1 in in
Blank 2% EV-AQ1 2% EV-AQ1
2% EV-AQ1 in in
Blank
top coat top coat
top coat
top coat
+ + + +
Fig.7 Photo of African teak after weathering test for 300hrs
Fig.7 Photo of African teak after weathering test for 300hrs RESULTS
10% EV-SB1mixed with
10% EV-SB1mixed with
10% EV-SB1mixed with
10% EV-SB1mixed with
Fig.7 Photo of African teak after weathering test for 300hrsent
IPA in the pretreatm
Butyl Carbitol in the
IPA in the pretreatment
Butyl Carbitol in the
pretreatment
pretreatment
ur data confirmed that the solubility parameter of
oisopropyl alcohol is 11.5 and butyl carbitol is 9.9.
After weathering test, SB-1 mixed with isopropyl alcohol
is better than butyl carbitol.
CONCLUSION
nvironmentally friendly coatings are the trend for
Efuture development. We have developed several
ΔE=8.5 ΔE=4.1 ΔE=2.5
ΔE=4.1
ΔE=2.5
ΔE=8.5
unique products specifically for coatings.
Eversorb AQ-1, a blend of UV absorber and HALS, is
2% EV-AQ1 in in
2% EV-AQ1
Blank 2% EV-AQ1 in in 2% EV-AQ1
Blank
top coat
top coat top coat developed for waterborne clear coats.
top coat
+ + + + Eversorb SB1, designed for wood pretreatments, can
10% EV-SB1mixed with 10% EV-SB1mixed with protect lignin from UV light degradation.
10% EV-SB1mixed with
10% EV-SB1mixed with
IPA in the pretreatment
Butyl Carbitol in the
IPA in the pretreatment
Butyl Carbitol in the
pretreatment
Fig.8 Photo of Southern beech after weathering test for 300hrs
pretreatment
Fig.8 Photo of Southern beech after weathering test for 300hrs
Fig.8 Photo of Southern beech after weathering test for 300hrs
Lignin is a complex organic polymers. The functional group
contains hydroxyl groups (-oH). The solubility parameter
of isopropyl alcohol is 11.5 and butyl carbitol is 9.9. After
weathering test, SB-1 mixed with isopropyl alcohol is better
than butyl carbitol. Our data confirmed that the higher
solubility parameter can get the better performance. The
softwoods contain 25–35% lignin and hardwoods contain
Blank 2% EV-AQ1 in 2% EV-AQ1 in 18–25% lignin. Theory, SB-1 pre-treatment is significant
top coat top coat to protect softwoods. Data indicates that pre-treatment
+
ΔE=6.3
ΔE=31.9 ΔE=10.5 ΔE=6.3 + with SB-1 in softwoods (Southern Pine and Douglas fir) are
ΔE=10.5
ΔE=31.9
10% EV-SB1mixed with 10% EV-SB1mixed with significant effect than hardwoods (Cedar, Southern beech
Butyl Carbitol in the IPA in the pretreatment
pretreatment and African Teak).
Fig.9 Photo of Southern Pine after weathering test for 300hrs Coating manufactures may still need to run the
experiments to confirm its coating systems compatibility.
Fig.9 Photo of Southern Pine after weathering test for Also, a tailor made UV absorber and light stabilizer
300hrs RESULTS RESULTS package can be offering to fulfill your special needs.
E-mail: gigi@ecic.com.tw
[1] YAO-HSING HUANG, YUNG-CHI YANG. Light stabilisers
for clear coatings [J]. Polymers Paint Colour Journal,
2010, 2000(4544):38.
[2] EVANS, P. D., A. F. A. WALLIS and N. L. OWEN.
Weathering of chemically modified wood surfaces [J].
Wood Science and Technology, 2000, 34(2): 151-165
[3] CHANG, S. T., D. N. S. HON and W. C. Feist.
ΔE=27.2 ΔE=25.1 ΔE=23.3 Photodegradation and photoprotection of wood
surface [J]. Wood and Fiber Science, 1982, 14(2):
Blank 2% EV-AQ1 in 2% EV-AQ1 in 104-117.
top coat top coat
+ + [4] EVANS, P. D., A. F. A. WALLIS and N. L. OWEN.
10% EV-SB1mixed with 10% EV-SB1mixed with Weathering of chemically modified wood surfaces [J].
Butyl Carbitol in the IPA in the pretreatment
pretreatment Wood Science and Technology, 2000, 34(2): 151-165.
Fig.10 Photo of Luanta-fir after wearthing test for 300hrs
Plastics News | August 2017 38