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Research on the matching performance of ZJ9104 and HAA

2021-3-31

Discuss the comparison of Zhengjie polyester 9104 (Primid system) with the Primid system polyester of other manufacturers, and the comparison of ZJ552 with HAA curing agent of other manufacturers, and explore the matching performance of 9104 and HAA.

1 background

Huangshan Zhengjie New Material Co., Ltd. was established in 2008. It is an Anhui high-tech enterprise specializing in the research and development, production and sales of polyester resins for powder coatings and hydroxyalkyl amide (HAA) curing agents for powder coatings. In the domestic powder coating polyester industry, Huangshan Zhengjie has advanced production equipment, testing instruments and process technology, and has invested a lot of money to introduce automatic control systems, and use advanced automatic control systems to monitor the process conditions and processes in the polyester production process. Strictly controlled, the polyester products produced are of stable quality and have a good reputation in the industry.

This article mainly discusses the comparison between Zhengjie polyester 9104 (Primid system) and the Primid system polyester of other different manufacturers, and the comparison of ZJ552 with HAA curing agent of other manufacturers to explore the matching performance of 9104 and HAA.

2 Experimental part

2.1 Experimental raw materials

ZJ9104 polyester, polyester B, polyester C, polyester D, solid leveling agent (general), benzoin (commercially available), high gloss barium (BL-911), titanium dioxide (AR-312).

Table 1 Technical indicators of 9104 polyester

Acid value	24-27
Viscosity（200℃/P）	35-45
Resin/curing agent	96/4
Tg（℃）	≥61
Softening point/℃	110-120

2.2 Polyester comparative experimental formula

Table 2 Polyester comparative experimental formula

	1	2	3	4
9104	380
Polyester 2		380
Polyester 3			380
Polyester 4				380
ZJ552	16	16	16	16
Leveling agent	7	7	7	7
High-gloss barium	130	130	130	130
Titanium Dioxide	170	170	170	170
Benzoin	3	3	3	3

2.3 Anti-yellowing experimental formula

Table 3 Anti-yellowing comparative experimental formula

9104	420
Polyester B		420
Polyester C			420
Polyester D				420
ZJ552	18	18	18	18
Leveling agent	7	7	7	7
High-gloss barium	200	200	200	200
Titanium Dioxide	170	170	170	170
Benzoin	3	3	3	3

2.4 Testing equipment

Table 4 Experimental testing equipment

Instrument	Model	Manufacturer
Twin screw extruder	DDE-3020	Kunshan Debo
Electric heating constant temperature blast drying oven	DHG-9146A	Shanghai Jinghong
Gloss meter	HP-306	Shanghai Hampoo
Coating Thickness Gauge	AR930	Simma
Paint film impactor	QCJ type	Tianjin Jingke
Gel time meter	CQ-J11	Shenzhen Chengqixin Technology

3 Results and discussion

According to the formulas in Table 2 and Table 3, the experimental results obtained are shown in Table 5 and Table 6 (curing condition 180℃/15min):

Table 5 Comparison of experimental results of polyester

Polyester	ZJ9104	Polyester 2	Polyester 3	Polyester 4
Film thickness/μm	120-130	120-130	120-130	115-125
Film gloss（60℃）	92	88	89	90
Appearance of coating film	Good leveling	Obviously pinholes	Slight pinhole	Good leveling
Impact performance/50Kg*cm	Recoil pass	Recoil pass	Recoil pass	Recoil pass
Gel time（180℃）	323	254	285	306

Table 6 Comparison of yellowing resistance test results

ZJ552	9104	Polyester B	Polyester C	Polyester D
Film gloss/μm	90-95	85-90	95-100	90-100
Film gloss（60℃）	89	88	87	88
Appearance of coating film	Good leveling	Obviously pinholes	Slight pinhole	Good leveling
Impact performance/50Kg*cm	Recoil pass	Recoil pass	Recoil pass	Recoil pass
Gel time（180℃）	341	266	294	312
Overbake (210℃/60min)Color difference(∆E)	1.4	2.4	1.8	1.4

The data in Table 5 and Table 6 show that the leveling performance of ZJ9104 is relatively excellent, and at the same time, it will not produce pinholes when it is thickly coated to 130μm. Compared with other Primid system polyesters, it has excellent board surface effect and mechanical properties. Excellent performance. After over-baking, the yellowing resistance is relatively excellent. ZJ552 has good compatibility with our company's Primid system polyester, and has excellent leveling and mechanical properties.

4 Concluding remarks

ZJ9104 matches ZJ552 with excellent leveling and mechanical properties, and excellent thick coating performance, which can meet customer needs. Higher Tg gives ZJ9104 good storage stability, and the curing ratio of 96/4 is more economical in terms of cost. The environmental protection of Primid system polyester enables ZJ9104 to be used not only in outdoor systems, but also indoors. ZJ9104 has many advantages and wide availability.

Research on the matching performance of ZJ9104 and HAA

Anhui Huizhou Zhengjie Technology Co., Ltd.