Low Curing Hybrid Polyester Resin with Good Board Appearance

• CAS No.: 25135-73-3
• Formula: /
• EINECS: /
• Molecular Principal Chain: High-Molecular Polymer
• Color: White
• Ratio: 50:50
• Model NO.: HH2535
• Type: Polyester Epoxy Hybrid Type
• Acid Value (Mgkoh/G): 74-82
• Transport Package: 25kg/Bag
• Trademark: KINTE
• Origin: China
• HS Code: 3907999000
• Production Capacity: 80000 Tons Per Year

Product Description

Low Curing Polyester Epoxy Resin with Good Board Appearance 

HH2535 is a carboxyl terminated saturated polyester resin, which is mainly used in
polyester / epoxy powder coating system. 
In recent years, powder coatings have developed rapidly. Compared with traditional liquid coatings, powder coatings have the characteristics of energy saving, environmental protection and excellent comprehensive performance. At present, the curing time of most powder coatings is about 180-200 degrees Celsius. With the strengthening of the concept of energy saving and environmental protection in today's society, low temperature curing powder coatings is a development trend. In addition, some heat-sensitive substrates, such as MDF, are also temperature-sensitive and require low temperature curing.
The main raw material of powder coating is polyester resin. To reduce the curing temperature of powder coating, it is mainly required that polyester resin can be cured at low temperature. Lowering the curing temperature necessarily requires high reactivity of the resin, and high reactivity can have a certain impact on the performance of the coating. The existing powder coating systems mainly have the following problems when used for low temperature curing. On the one hand, the reactivity of the system is not enough, the powder coating cannot be completely cured, and the coating performance is not ideal; in order to achieve the reactivity required for low-temperature curing, polyester resins often have higher melt viscosity and higher reactivity, and at low temperatures conditions cannot be adequately leveled. These greatly affect the decorative properties of powder coatings.
HH2535 greatly improves the reactivity, and at the same time has board appearance and excellent degassing performance. When the resin is applied to powder coatings, it achieves low-temperature curing very well, the coating has good adhesion to the substrate, and has good leveling and stability, and chemical resistance, designed for thermosensitive substrate.


Basic Features
Designed for thermosensitive substrate
Excellent degassing performance
Good board appearance.


Recommend Formulation:   

HH2535	014U Epoxy	TiO2	8000Ba	Leveling agent	Benzoin	701
150	150	102	90	4	2	2.5

Specifications:

Appearance	White or Light Yellow Transparent Flakes
Acid Number (mgKOH/g)	74~82
Softening Point (ºC)	90~103
Glass Transition Temp. ( ºC)	~52
Melting Viscosity (ICI, mPa·s/200ºC)	500~1500
Reactivity at 180ºC (s, 50% 014U)	80~150
Curing Requirement	130ºC×15-20min or intermediate infrared × 3min
Packaging	PE Bags, Net Weight 25kg ± 0.1kg / bag

Extrusion Condition:
Two-screw Extruder
Jacket Temperature:  110~120ºC
Speed of Revolution:  500~1200rpm
Fineness of Powder:  <100μm


Application Condition:
Electrostatic spraying with:  40~70KV
Coating film thickness:  50~70μm
Degreased cold-rolled steel:  0.5mm


Film Properties:

Gel Time (180ºC, sec)	70~140
Horizontal Flow (180ºC, mm)	20~25
Gloss (60°)	≥95%
Bending (φ1mm)	2T
Adhesive (1mm, grade)	0
Pencil Hardness	≥1H
Impact (50cm)	+30, -20

More Code

Code	Ratio	Cure Cycle	Acid Value (mgKOH/g)	Viscosity (mPa.s/200ºC)	Tg (ºC)	Reactivity (s/180ºC)	Properties
NH2533	50/50	130ºC*15-20min	68~75	1500~3500	~54	30-110	Low curing temperature, excellent storage stability, excellent chemical resistance and outstanding mechanical performance.
NH2535	50/50	130ºC*15-20min or intermediate infrared*3min	74~82	500~1500	~52	80-150	Excellent degassing performance and good board appearance, designed for thermosensitive substrate.
MDF Resins	50/50	140ºC×15-20min or infrared 3min	68~75	500~2000	~50	60-100	Good leveling, good mechanical properties, good storage stability amd low curing temperature.

Remarks: All the polyester resins could be customized to Non-tin (A), anti gas burners (G), tribo gun (T) and anti-blooming (F).




Company Profile:
Kinte Materials Science and Technology Co., Ltd. is subordinate to China Machinery Industry Corporation (a key state-owned enterprise directly managed by SASAC, ranking 284 among the world's top 500 in 2021). It is a national high-tech enterprise under China National Electric Apparatus Research Institute Co., Ltd. (Stock Code: 688128), a listed enterprise on the SSE STAR MARKET. Focusing on the R & D, production, and sales of environmentally friendly coatings (powder coatings, waterborne industrial coatings) and powder coating resins, the company is committed to improving the global market competitiveness of China's environmentally friendly coating industry. Now it has become the leader and promoter in China's technological development of environmentally friendly coatings as well as polyester resins for powder coatings!

We have gained ISO9001 and ISO14000, ISO18001, RoHS, UL certification, and QUALICOAT Certificates. Due to the excellent and stable quality, our products always enjoy a high reputation at home and overseas, and were sold to more than 30 countries.

The polyester resin branch was founded in 2000, now there are two factories (DongGuan factory and TaiXing Factory) with an annual production capacity of over 80,000 tons, and the annual production capacity reached 120000 tons by the end of 2020, opening the road to global diversified development. Our clients include many top-tier powder manufacturers in the world such as AKZO, PPG, TIGER, PROTECH, NIPPON, OXYPLAST, JOTUN, SHERWIN, VALSPAR, SINTERPLAST, etc.

We unremittingly stick to the business principle of "Quality is the life, adhere to first-class technology, first-class quality, first-class cost, and first-class brand". We would like to provide a complete set of services and solutions for both domestic and abroad customers and would like to go forward to a brilliant future with you together.