Matting Agents for Powder Coatings

Matting Agents for Powder Coatings

Hangzhou Right Chemical Co., Ltd.

Mar. 03, 2015

Address: Rm.612, Building 12, XueYuan Chun Xiao, XueYuan Road, Hangzhou 310012, P.R.China.

Tel: +86-0571-88254703 Fax: +86-0571-88254723 E-mail: [email protected]

A long with the development of powder coatings, a wide gloss range of powder coatings are globally in demand by the customers in the world.

Address: Rm.612, Building 12, XueYuan Chun Xiao, XueYuan Road, Hangzhou 310012, P.R.China. Tel: +86-0571-88254703 Fax: +86-0571-88254723 E-mail: [email protected]

High Gloss Matt

Semi Gloss

Dead Matt

10-40%

>85% 40-80%

0-10%

e continue to make our efforts to develop a substantial range of matting agents to satisfy the needs of our customers through technical research & development on powders, resins and additives.

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Currently, we supply a high quality, economical and easy-to-use matting agents series to the powder coatings producers all over the world.


Below is the normal classification of the gloss at 60o

How to select the proper matting agents for powder coatings?


Now we are pleased to introduce our matting agents series as below.

Indoor Use

Pure Epoxy Type: Rimatt ®RC68 Hybrid Type: Rimatt ®RC68 Rimatt ®RC7235

Outdoor UsePure Resin Type:Rimatt ®RC7309Rimatt ®RC7319Rimatt ®RC7500Rimatt ®RC7600Rimatt ®RC7700Rimatt ®RC7700A


Epoxy Hybrid PE/TGIC PE/HAA PE/Acrylic PU Remarks

Rimatt ®RC68 1-10% 10-60% Vestagon B68(Evonik)

Rimatt ®RC7235 3-60%

Rimatt ®RC7309 30-60% 30-60% 30-60% 30-60% 30-60% DT3329-1(Huntsman)

Rimatt ®RC7319 8-30%

Rimatt ®RC7500 1-30% Isocryl EP-550 (Estron)

Rimatt ®RC7600 1-30% Synthacryl 710 (Cytec)

Rimatt ®RC7700 1-30% Synthacryl 700 (Cytec)

Rimatt ®RC7700A 1-30% Isocryl EP-570 (Estron)


Main Matting Agents for Powder Coatings

1 Matting Agents for Indoor Use



Indoor Use

Pure Epoxy Type

Rimatt ®RC68

Hybrid TypeRimatt ®RC68Rimatt ®RC7235

Similar with Vestagon B68(Evonik), DT3368(Huntsman)

AdvantagesConventional matting hardener Rimatt ®RC68，it can be applied both in pure epoxy and hybrid powder coatings，gloss levels ranging from 1% to 70%.

Disadvantages1.Poor mechanical.2.Yellowing, notsuitable for producing light shade powder coatings.


Matting Hardener Rimatt ®RC68

+ Ethanol 78℃

+ Water 100℃

PMA 2PI RC68

PMDA 2PI RC68

Route 1

Route 2


The Synthesis of Rimatt ®RC68

IdentificationName: 2-Phenyl-2-imidazoline pyromellitateMolecular Formula: C10H6O8 . C9H10N2 Molecular Weight: 400.34CAS : 54553-90-1EINECS: 259-224-4Structural formula ：

Safety Data Hazard Symbols ： Xn Risk Codes：R22;R51/53


Indentification and Safety Data of Rimatt ®RC68

2PI PMA or PMDA

• Ethylenediamine (EDA)

• Benzonitrile

• Durene (1,2,4,5-Tetramethylbenzene)

1. Strict environmental protection requirements.

2. The different industrial applications of PMA and PMDA.

The prices fluctuations of the above 2 raw materials of Rimatt

®RC68 is always very big, the main reasons are:


The Influence Factors of Rimatt ®RC68 Costs

3. The international crude oil price.


Ingredients No.1 No.2 No.3 No.4

Epoxy Resin (EEW=850-1000 ) 415 545

Epoxy Resin (EEW=700-850) 410 540

Polyester Resin (AV=30-35) 140 145

Matting Hardener, Rimatt ®RC68 30 35 50 55

Flow Agent, PV88 10 10 10 10

Fillers,BaSO4 396　 391　 356　 356　

Carbon Black 6　 6　 6　 6　

Degassing Agent, Benzoin 3 3 3 3

Total 1000 1000 1000 1000

Gloss @60O,% 20-25 20-25 5-10 5-10

Curing conditions: 12-15 Min.@190°C, 10-12 Min.@200°C

Tests

Starting Formulation Based on Rimatt ®RC68


Different resin may influence on gloss.04

Starting formulation，less use of epoxy resins than Rimatt ®RC68.02

And excellent anti-yellowing properties. 03

Matting agent for hybrid, gloss of 3-60%. 01

The Special Properties of Matting Agent Rimatt ®RC7235


Ingredients No.5 No.6

Polyester Resin (50/50) 250 240

Epoxy Resin,E-12 250 240

Leveling Agent, RC588 10 10

Matting Fillers,BaSO4 424 414

Carbon Black 6 6

Rimatt ®RC7235 20　 40

Epoxy Resin,E-12(excess) 40　 60　

Total 1000 1000

Gloss @60O,% 13 3

Excess Epoxy resin is needed, RC7235 /Excess E-12 ratio is 1/1.5Curing condition: 10Min.@200°C

Tests

Starting Formulation Based on Rimatt ®RC7235(Black)


It is necessary to select proper resin for Rimatt ®RC7235.Resin of 50/50 is our first choice, also 60/40 is nice one, but we don’t suggest to use resin of 70/30.

Due to different catalysts inside the resins, it can affect the reaction speed ratio and affect the final gloss.

We recommend to use resin which has slow reaction speed and low viscosity. ShenJian company：SJ3B（50/50）TianSong company：6700（60/40）

Resin is the most important factor for Rimatt ®RC7235 application, so the powder manufacturer should select the proper resin before production.

Select proper resin for Rimatt ®RC7235 application


As per our experience, in the large production, we suggest, better to lower the first zone of the extrusion temperature to between 90-105 °C and the second zone to 100-115 °C in order to get better effect.

The rotating speed of the extruder should be slower relatively.

Indentification and Safety Data of Rimatt ®RC68


Ingredients NO.7 No.8 No.9 No.10

Polyester Resin (50/50),SJ3B 265 255 250 245

Epoxy Resin,E-12,GESR903H 295 305 310 315

Leveling Agent, RC588 10 10 10 10

Matting Fillers,BaSO4 172 162 152 142

TiO2 , R930 240 240 240 240

Benzion 3 3 3 3

Rimatt ®RC7235 15 25 35 45

Total 1000 1000 1000 1000

Gloss @60o,% 22-24 10-11 5-7 5-6

Tests

The Various Gloss of Rimatt ®RC7235 with Different Dosage


*Formulation see（ Rimatt ®RC68 Vs Rimatt ®RC7235）test No.12

Curing condition 15Min.@180°C 15Min.@190°C 15Min.@200°C

Gloss @60O,% 6.0 6.0 5.7

Conclusion: Different curing temperature influence on the gloss is not big, but high curing temperature can obtain better mechanical properties. The mechanical property of large production of powder coating is better than lab tests.

It can obtain the lowest gloss in the black powder.

Rimatt ®RC7235

Gloss Changes on Different Baking Temperature



Materials Rimatt ®RC68 Rimatt ®RC7235

Polyester Resin (50/50),SJ3B 250

Epoxy Resin,E-12, GESR903H 560 310

Leveling Agent, RC588 10 10

Matting Fillers,BaSO4 131 147

TiO2 , R930 240 240

Benzion 3 3

Rimatt ®RC68 56

Rimatt ®RC7235 　 40

Gloss @60O,% 5-7 5-7

Curing condition: 10Min.@200°C.GESR903H :740-800g/eq, Epoxy Base Electronic Material Corporation Limited.SJ3B :Acid value=68-75 ,Anhui Shenjian New Materials Co., Ltd

Tests

Formulation（Rimatt ®RC68 Vs Rimatt ®RC7235）


Yellowing Testing Data Rimatt ®RC68 Vs Rimatt ®RC7235

Yellowing testing data L △L A △A B △B △E

RC6815min.@190℃ 93,2058 0 -1,6769 0 2,3176 0 0

30min.@200℃ 92,6612 -0.54 -1,3561 0.32 6,9054 4.59 4.63

RC723515min.@190℃ 95,9631 0 -1,3114 0 2,5773 0 0

30min.@200℃ 95,2555 -0.71 -1,431 -0.12 2,9225 0.35 0.80

Conclusion：From the test result of baking performance, the yellow resistance of Rimatt ®RC7235 is much better than Rimatt ®RC68.


Rimatt ®RC68 Rimatt ®RC7235 Rimatt ®RC7235L

30Min.@180°C 1.7% 0.6% 0.5%

30Min.@200°C 2.2% 1.0% 0.8%

30Min.@220°C 2.5% 1.7% 1.2%

Testing condition：Take 100g, and weigh the loss weight in setting temperature for 30 minutes.Conclusion：Under the same baking temperature, the volatile of Rimatt ®RC7235 is less than Rimatt ®RC68.

Volatile Tests of Rimatt ®RC68 Vs Rimatt ®RC7235


From the initial formulation，less use of epoxy resins than Rimatt ®RC68.

Lower dosage than Rimatt ®RC68.

For example in formulation（RC68 VS RC7235）（1）260kg polyester resin(50/50) can replace about 260kg epoxy resin E-12 The cost of powder per ton can save about 260（A-B)/ MT A= E-12 price B=Polyester resin price （2）40kg RC7235 can replace 56kg RC68 The cost of powder per ton can save about 56C – 40D C= RC68 price D=RC7235 price Conclusion: The costs of powder per ton can be saved more than the sum of the above two costs.

Economy of Rimatt ®RC68 Vs Rimatt ®RC7235


Conclusion:In the view of yellowing resistance, the economy, the price stability,

It is worth to using Rimatt ®RC7235 to replace Rimatt ®RC68.

2 Matting Agents for Outdoor Use



Matting Agents Rimatt ®RC7309Rimatt ®RC7319

Hybrid Type Rimatt ®RC7500 Rimatt ®RC7600 Rimatt ®RC7700 Rimatt ®RC7700A

Outdoor Use


Similar with DT3329-1(HUNTSMAN) (For TGIC based powder coating)

Advantages1.Gloss of 30-60%

2.Anti-yellowing

3.Good flow

4.Suitable for all resins

Disadvantages1.Due to wax containing, the use of RC7309 is restricted to the light and pastel shades powder.

2.The Max. dosage is 5%.



Ingredients No.1 No.2 No.3

Polyester Resin ,SJ4#E (AV=34) 560 560 560

Hardner, TGIC 42 42 42

Leveling Agent， RC588 9 9 9

Fillers, BaSO4, W44HB 134 124 114

TiO2 , R706 240 240 240

Rimatt ®RC7309(1.5%) 15　

Rimatt ®RC7309(2.5%) 　 25　　

Rimatt ®RC7309(3.5%) 35

TOTAL 100 1000 1000

Gloss @60o,% 51 37.5 35

Tests



Curing condition Rimatt ®RC7309

30Min.@180°C 0%

30Min.@200°C 0.1%

30Min.@220°C 0.2%

Testing condition：Take 100g RC7309, and weigh the loss weight in setting temperature for 30 minutes.

Volatile Test of Rimatt ®RC7309


For TGIC based powder coating

Advantages

1.Gloss of 8-30 %

2.Anti-yellowing

3.Good flow

Disadvantages

Different resin influence to gloss.



It is necessary to select proper resin. Due to different catalysts inside the resins, it can affect reaction speed ratio and affect the final gloss.

We recommend to select resin which has slow reaction speed and low viscosity. ShenJian company：SJ4ETDSM: P4900, P5300, P6410 Chansieh: EL-6600 CYTEC: CRYLCOAT 2441-2

Resin is the most important factor for Rimatt ®RC7319 application，so the powder manufacturer should select the proper resin before production.

Select Proper Resin for Rimatt ®RC7319 application



Ingredients No.4 No.5 No.6

Polyester Resin (AV=34) 560 560 560

Hardner, TGIC 42 42 42

Leveling Agent， RC588 9 9 9

Fillers, BaSO4, W44HB 129 109 99

TiO2 , R706 240 240 240

Rimatt ®RC7319(2%) 20　

Rimatt ®RC7319(4%) 　 40　　

Rimatt ®RC7319(5%) 50

TOTAL 1000 1000 1000

Gloss @60o,% 55.5 20.3 15.6

Tests

Curing condition: 10Min.@200oC


*Formulation see（ Rimatt ®RC68 Vs Rimatt ®RC7235）test No.8

Curing condition 15Min.@180°C 15Min.@190°C 15Min.@200°C

Gloss @60O,% 17.5 16.8 16.5

Conclusion: Gloss changes on different baking temperature is not big, but in high curing temperature, it can obtain better mechanical properties.The mechanical property of large production powder coating is better than lab test.

In the black powder, it can obtain the lower gloss than in in light shade powder.

Rimatt ®RC7319

Gloss Changes on Different Baking Temperature


Storage Stability Comparison Tests of Rimatt ®RC7319 at 43°C

Time 0 day 1 day 3 day 4 day 6 day 8 day 10 day

Gloss@60O,% 15.8 15.4 16.5 16.8 17.1 18.2 21.5

A (Guangdong) 21.2 21.1 22.8 23.5 24.9 27.6 31.6

B (Anhui) 19.3 19.3 21.2 22.8 24.4 26.1 30.1

Grades

White formula based on SJ4E polyester resin.4.5% Matting agent on the total formula.Preparation of about 300g matt powder coating.The powder is divided into 7 parts are placed in 43°C constant temperature box.Different time tests on gloss (60°,%)

Conclusion：Gloss changes is better than others local products.Gloss from the sixth day were slightly worse, should be in an acceptable range.

Volatile Tests of Rimatt ®RC7319

Curing condition Rimatt ®RC7319

30Min.@180°C 0.6%

30Min.@200°C 0.7%

30Min.@220°C 1.2%

Testing condition：Take 100g RC7319, and weigh the loss weight in setting temperature for 30 minutes.



Acrylic resins is a glycidyl-functional acrylic hardener designed to produce low gloss, exterior-durable polyester powder coatings. Benefits include consistent gloss, smooth matte appearance and dependable performance. “One-shot” low gloss coatings can be produced by using acrylic resins in conjunction with 30-35 acid value polyesters.

Standard polyester resins used for TGIC, HAA, GMA or Araldite PT-910 powder coatings are well suited for use with acrylic resins.

Acrylic Resins for Matting Powder Coatings


Acrylic Resin Grades

Grades Epoxy Equivalent Weight Similar With

Rimatt ®RC7500 500-550 ISOCRYL EP-550 (ESTRON)

Rimatt ®RC7600 580-650 SYNTHACRYL 710 (CYTEC)

Rimatt ®RC7700 650-750 SYNTHACRYL 700 (CYTEC)

Rimatt ®RC7700A 650-750 ISOCRYL EP-570 (ESTRON)




Polyester Resin (AV=34) 460 490

Rimatt ®RC7500 140 110

Hardner, TGIC 8 15

Leveling Agent , RC588 10 10

Fillers, BaSO4, W44HB 375 367

Carbon Black 7 70.5

Total 1000 1000

Gloss @60O,% 2.9 9

Tests

Curing condition: 10Min.@200°C

THANK YOU

Matting Agents for Powder Coatings

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