1.INTRODUCTION :
YE-2080 is a saturated hydroxyl polyester resin curing with BLOCKED IPDI for thermosetting
powder coating, Applies to outdoor decorative and functional painting with good outdoor durability,
or curing with Powderlink1174 for special thermosetting powder coating, applies to decorative
wrinkle texture coatings.
2.CHARACTERISTICS OF THE RESIN
Appearance……………………pale granules
Acid value(mgKOH/g)……………………<10 (1)
Hydroxide value (mgKOH/g)……………35-45
Color……………………………………max.2 (2)
Viscosity at 165°C(mPa..s)………30000--45000 (3)
Glass transition temperature(Tg).….approx.64°C (4)
Softening point(°C)……………………110-115
(1)ISO-3682 (2)ASTM-D-2849
(3)ICI CONE & PLATE (4)DSC(METTLER)
4.APPLICATION:
TYPICAL POWDER FORMULA: PU high gloss painting wrinkle painting
Titanium dioxide……………………………… 300 240 (1)
Polyester YE-2080……………………………498 564
Curing agent ………………………………102 (2) 36 (3)
Flow control agent……………………………. 10 7.8 (4)
Benzoin ……………………………………. 5 8.4
The others additive ……………………… 1.2 (5) 3.6 (6)
(1) DuPont R-902 or R706
(2)VESTAGON B-1530, NCO%=15% (Supplier: HULS) Other BLOCKED IPDI are suitable.
YE-2080/BLOCKED IPDI=83/17
(3)Powderlink 1174(Supplier : Cytech) YE-2080/Powderlink 1174=94/6
(4) YL-1080 (Silica Adsorption 65% Supplied by Yin Yang Resin Co., Ltd)
(5) DBTDL (6)Actiron SI32-18A (Supplier : Synthron)、
5.MANUFACTURING PROCEDURE AND TESTING
MANUFACTURING
a. Pre-mixing ( dry blend of the above components)
b. Homogeneous extrude at temperature of 105°C-115°C
c. Cool down and early pieces
d. Abrading powder to obtain a free -flowing powder maximum particle size of 80micron
COATING CONDITION:
Voltage…………………………………. 60-80kv
Air pressure………………………….. 1-2kg-cm2
Test panel……………………….0.35 mm steel panels
TEST RESULT:
TYPICAL POWDER FORMULA PU high gloss painting wrinkle painting
Firm situation (object temperature) 15mins at 200°C 20mins at 190°
Film thickness………………………… 60-80µm 60-80µm
Gloss (60) ……………………………>90% 3.9% (1)
(20) 2.2%
Erichsen slow penetration……………… >6mm >8mm (2)
Direct/reverse impact……………………>50kg-cm …………… (3)
Conical mandrel…………………………pass pass (4)
Crosshatch adhesion………………………Gt=0 Gt=0 (5)
MEK solvent resistance test ………………200+
Yellowing index……………………………-3.5
Salt fog 1000hs, film peel off …………… 0mm
Performance ……… 10(no change)
Moisture resistance at 20°C 500hs ……………no change
Stability in storage at 40°
(1)ASTM D-523(60°) (2) DIN 53165 (3)ASTMD-2194
(4)ASTM D-522 (5) DIN53151