1. INTRODUCTION
YE-6590 is an indoor saturated carboxylic polyester resin compounding with epoxy resin at 50/50 for thermosetting powder coating, applied to indoor low temperature coating for spring and MDF substrate.
2. CHARACTERISTICS OF THE RESIN
Appearance…………………………light yellow flakes
Acid Value (mg KOH/g)……………75-85 (1)
Color……………………………… ≤ 3 (2)
Viscosity at 165℃ (mPa…S)……9000-18000 (3)
Glass Transition Temperature (Tg)… 57ºC (4)
Softening Point (℃)………………98-105 (5)
(1)GB/T 6743-2008;(2)GB/T 1722-92;(3)GB/T 9751.1-2008; (4)GB/T 19466.2-2004; (5)GB/T 12007.6-1989
3. TYPICAL POWDER FORMULA:
Titanium Dioxide……………………………… 200 (1)
Polyester YE-6590……………………………400
Epoxy……………………………………………400 (2)
Flow Control Agent………………………………10 (3)
Benzoin………………………………… 5
(1) Dupont R-902;
(2) ARALDITE GT-7004, WPE: 775 (Supplier: Ciba-Geigy) D.E.R.663U WPE: 780 (Supplier: DOWS Chemical) other epoxy supplier are also suitable. YE-6590/EPOXY = 50/50;
(3)YL-1080 (Silica Absorption 65% supplied by YinYang Resin Co., Ltd)
4. MANUFACTURING PROCEDURE AND TESTING
（1） MANUFACTURING
a. Pre-mixing (dry-blend of the component above)
b. Homogeneous extrude at temperature of 70-75℃)
c. Cool down and initial grinding
d. Milling and sieve to obtain a fine free-flowing powder maximum particle size of 80 um
（2）COATING CONDITION:
Voltage………………………… 60-80 kv
Air Pressure………………………………1-2kg/cm2
Test Panel……………………………0.35mm steel panel
（3） CURING CONDITION:
15 to 20 minutes at 120℃ (object temperature)
（4） TEST RESULT:
Film Thickness…………………………………60-80um
Gloss………………………………….>80% (1)
Erichsen Slow Penetration ………… 5mm (2)
Direct / Reverse Impact…..……………50kg-cm (3)
Conical Mandrel…………………………Pass (4)
Crosshatch adhesion……………………GT=0 (5)
(1)GB/T 9754-1988； (2)GB/T 9753-1988；(3)GB/T 1732-1993；(4)GB/T 6742-1986；(5)GB/T 9286-1998
5. PACKING AND STORAGE
25 kilogram paper bag or PE bag; stored in a cool dry indoor place at temperature of -20℃ to 35℃. Avoid long-term exposure to direct sunlight. The shelf life of the resin is one year in the above-mentioned storage conditions. It is proposed that the product beyond the shelf life can still be used after tested qualified.
Note: The above-mentioned indications are based on carefully made tests. No liability can be assumed in the event of any inaccuracy or incompleteness being found in the value listed above and consequently we recommend evaluation in your own laboratories prior to use.
Guang Dong Yin Yang Environment -Friendly New Materials Co .,Ltd . is a national high-tech enterprise integrating R&D, manufacturing and marketing, an environment-friendly high-tech enterprise for water-based emulsion polymers and polyester resin for powder coatings.