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ASAHIKLINAK-225AESINTRODUCTIONASAHIKLINAK-225AESwasdevelopedasadefluxingagent

詳細介紹


ASAHIKLIN AK-225AES


 


INTRODUCTION


ASAHIKLIN AK-225AES was developed as a defluxing agent. AK-225AES is an azeotrope-like mixture of AK-225, ethanol and stabilizer and is suitable for use in a vapor degreaser. It effectively removes flux residues as well as ionic soils from printed circuit boards and other electronic devices.  AK-225AES is 95% VOC free as of the October 8, 1996 Federal Register.


 


PHYSICAL PROPERTIES


Physical properties of AK-225AES are shown in Table 1.





Table 1  Physical Properties of AK-225AES.




 




 

AK-225AES

CFC-113AES(1)

Boiling Point ( C)

52

46.5

Freezing Point ( C)

-138

-41.8

Density (g/cm3)

1.49

1.50

Viscosity (cP, 25 C)

0.61

0.66

Surface Tension (dyne/cm, 25 C)

16.8

18.5(2)

Vapor Pressure (mmHg, 25 C)

291

360

Latent Heat of Vaporization (cal/g, b.p.)

40.6

42.9

Relative Evaporation Rate (Ether=100)

81

120

Specific Heat (cal/g   C)

0.27

0.272(2)

Solubility of Water (wt%, 25 C)

0.33

0.25

Solubility in Water (wt%, 25 C)

0.053

 

Flash Point ( C)

None

None

KB Value

41

39




(1) CFC-113AES is a mixture of CFC-113, alcohol and stabilizer.     (2) At 20 C.




 




 




CLEANING PROCEDURES




It is recommended that AK-225AES be used in a vapor degreaser for maximum cleaning efficiency,




economy and emission control. Cleaning procedures for AK-225AES are quite similar to those of CFC-




113AES (a mixture of CFC-113, ethanol and stabilizer). The procedures consist of immersing a workload into the boiling solvent, rinsing or spraying with cool solvent and drying in solvent vapor.




 




 




MATERIAL COMPATIBILITY




AK-225AES is compatible with many common materials under typical cleaning conditions. However,




certain plastics and elastomers are affected by AK-225AES. It is recommended that material compatibility be tested prior to use.




 




Tables 2 and 3 show the effect of AK-225AES on unstressed plastics under typical cleaning conditions (at the boiling point for five minutes) and also under extreme conditions (3 days at the boiling point). AK-




225AES is compatible with most plastics except polymethyl methacrylate. Some plastics such as polycarbonate, ABS resins and polyphenylene oxide, however, will crack or craze if they are stressed.




 




Table 2  Effect of AK-225AES on Unstressed Plastics for 5 minutes at the Boiling Point.


 

AK-225AES

CFC-113AES

 

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Polyvinyl chloride (rigid)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Polyvinyl chloride (plasticized)

2.1

0.4

0.7

<0.1

<0.1

0.3

Polyethylene (HP)

0.1

0.2

<0.1

0.2

<0.1

<0.1

Polyethylene (LP)

0.4

0.5

0.1

<0.1

<0.1

0.1

Polypropylene

0.1

0.5

0.1

<0.1

<0.1

<0.1

Polystyrene

0.8

0.3

<0.1

0.5

<0.1

0.1

Polymethyl methacrylate (Acrylic)

crack

crack

crack

<0.1

<0.1

<0.1

Polycarbonate

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Polyacetal

<0.1

<0.1

0.1

<0.1

<0.1

<0.1

Polyphenylene oxide

0.1

0.2

0.1

<0.1

<0.1

<0.1

Phenolic

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

ABS

1.1

0.1

0.1

<0.1

<0.1

<0.1

Nylon 6

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Nylon 66

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Polyester (FR)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

PTFE

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

PCTRE

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Epoxy (FR)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Polyphenylene sulfide

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Polybutylene terephthalate

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1


 


 


Table 3  Effect of AK-225 AES on Unstressed Plastics for 3 Days at the Boiling Point.


 

AK-225 AES

CFC-113 AES

 

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Polyvinyl chloride (rigid)

<0.1

<0.1

0.2

<0.1

<0.1

0.2

Polyvinyl chloride (plasticized)

Stiffen

&

Deform

19.9

2.2

49.3

Polyethylene (HP)

3.2

0.7

<0.1

8.3

1.2

0.3

Polyethylene (LP)

8.0

1.5

0.1

7.2

1.1

0.3

Polypropylene

10.0

1.9

0.2

17.4

2.9

0.4

Polystyrene

28.6

0.8

0.9

42.5

3.0

2.8

Polymethyl methacrylate (Acrylic)

Dissolve

Dissolve

Dissolve

30.2

1.5

0.3

Polycarbonate

7.7

0.4

<0.1

0.6

0.5

0.3

Polyacetal

1.2

0.3

0.2

1.0

0.2

0.2

Polyphenylene oxide

13.8

0.6

1.9

30.8

0.8

1.0

Phenolic

-0.6

<0.1

<0.1

-0.2

<0.1

0.5

ABS

73.4

1.4

0.7

1.2

0.2

1.2

Nylon 6

0.1

0.2

<0.1

-0.3

0.2

0.3

Nylon 66

<0.1

<0.1

<0.1

0.6

0.1

0.5

Polyester (FR)

3.0

<0.1

0.2

1.0

0.1

0.1

PTFE

2.2

0.5

0.2

1.0

0.1

0.1

PCTRE

2.8

0.4

<0.1

1.6

0.2

0.2

Epoxy (FR)

<0.1

<0.1

<0.1

0.2

<0.1

0.1

Polyphenylene sulfide

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

Polybutylene terephthalate

0.4

0.2

<0.1

0.5

<0.1

<0.1



Tables 4 and 5 show the effect of AK-225 AES on elastomers under normal cleaning conditions (5 minutes at the boiling point) and also under extreme conditions (3 days at the boiling point). AK-225 AES affects some elastomers differently than CFC-113. Gaskets and/or seals used in cleaning equipment should be made of polytetrafluoroethylene, EPDM or chloroprene. Mechanical pump seals in solvent re-circulation pumps should be polytetrafluoroethylene. Seal-less pumps are ideal.


 


 


Table 4.  Effect of AK-225 AES on Elastomers for 5 Minutes at the Boiling Point.



 

AK-225 AES

CFC-113 AES

 

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Polysulfide rubber FA (T)

5.5

2.4

1.4

1.1

0.9

0.8

Natural rubber (NR)

2.9

0.9

0.8

3.6

0.6

2.6

Urethane rubber (U)

10.9

1.6

0.3

1.6

0.9

0.4

Isobutylene isoprene rubber (IIR)

2.0

0.5

1.7

5.7

0.3

3.1

Polychloroprene (CR)

2.1

0.3

0.8

1.6

<0.1

0.7

Fluoroelastomer E (FKM)

5.4

1.6

0.2

1.0

0.4

0.3

Chlorosulfonated polyethylene (CSM)

1.4

0.4

1.8

1.1

0.3

1.5

Silicone rubber (Q)

32.9

9.8

0.5

25.4

6.1

0.5

Nitryl Rubber (NBR)

11.5

2.9

1.6

1.8

1.0

1.5

Ethylene propylene diene terpolymer

(EPDM)

2.3

-0.1

1.5

4.1

0.7

3.7


 


 


 


 


Table 5. Effect of AK-225 AES on Elastomers for 3 Days at the Boiling Point.



 

AK-225AES

CFC-113AES*

 

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Weight

Change (%)

Linear Swell

(%)

Extractables

(%)

Polysulfide rubber FA (T)

114.8

24.5

10.4

19.8

2.3

17.0

Natural rubber (NR)

26.4

7.2

4.9

30.1

7.3

23.1

Urethane rubber (U)

170.2

32.3

0.2

32.2

7.3

3.3

Isobutylene isoprene rubber (IIR)

6.6

-0.4

14.1

40.1

5.8

30.5

Polychloroprene (CR)

26.6

4.1

7.7

18.9

5.4

15.2

Fluoroelastomer E (FKM)

65.6

20.6

1.9

32.0

12.0

1.8

Chlorosulfonated polyethylene (CSM)

1.4

-2.0

17.3

8.4

1.4

24.1

Silicone rubber (Q)

201.0

31.2

2.0

111.0

40.5

5.9

Nitryl Rubber (NBR)

160.9

31.9

13.4

20.5

3.5

22.1

Ethylene propylene diene terpolymer

(EPDM)

8.2

0.4

14.0

41.3

4.8

33.2


*CFC-113AES is a mixture of CFC-113, ethanol and stabilizer.


 


AK-225 AES is compatible with common metals. Table 6. Shows the effect of AK-225 AES on common metals after 7 days exposure at the boiling point.






Table 6. Effect of AK-225 AES on Metals after 7 Days at Boiling Point.




 

AK-225 AES

CFC-113 AES*

 

Wt Change

(mg/dm2   day)

Cl

(ppm)

Corrosion

Wt Change

(mg/dm2   day)

Cl

(ppm)

Corrosion

Steel (SPCC-SB)

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Stainless Steel (SS-304)

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Magnesium

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Aluminum

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Zinc

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Silver

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Copper

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Nickel Silver

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Phosphorous bronze

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Brass

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Tin

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Solder

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Tin Plating

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Cadmium Plating

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Nickel Plating

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Nickel-Chrome Plating

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.

Aluminite

N.D.

N.D.

N.A.

N.D.

N.D.

N.A.




 




Note:

 

N.D. &ndash; Not Detectable

Detection Limit of Weight Change: <0.1mg/dm2  day

 

 

N.A. &ndash; Not Apparent

Detection Limit of Cl Ion: <0.1ppm

Detection Method: Visual




 




STABILITY




Stability of AK-225AES is similar to CFC-113AES. Followings are the results of accelerated oxidation




testing. The test method is as follows*




 




Test Method: Solvents were refluxed for 48hrs under tungsten lamp irradiation with moisture saturated oxygen bubbled through continuously. Test coupons made of carbon steel were located in both the vapor and liquid phases.




 




Test Results after 48hrs




 




Solvent

Acidity as HCl (ppm)

Corrosion

AK-225AES

Not Detectable

None Apparent

CFC-113AES

Not Detectable

None Apparent




Detection Limit of Acidity: <0.2ppm




 




CONTAMINATION LEVEL CONTROL




 




To maintain effective cleaning in a vapor degreaser, it is important to keep contamination levels in the boil sump below, for example, 20% by weight. The level depends on the required cleanliness.  Contamination is monitored by measuring the specific gravity and boiling point of the solvent. Figures 1 and 2 offer




typical specific gravity and boiling point curves which are used to determine when the boil sump should be recharged. When first utilizing AK-225AES it is recommended that the boil sump be monitored weekly to insure that it is operating within the recommended guidelines. However, workloads vary from user to user and the frequency of monitoring can be shortened or extended based upon individual needs.




 




As with any solvent contamination such as flux will accumulate and it is important to maintain the pH of the solvent in the water separator above 5.




 




Minimize introduction of water into equipment containing AK-225AES. Alcohol and the stabilizer in AK-225 will be extracted by large amount of water.

旭硝子AK-225AES 技術文檔支持下載


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