Dent All

Otsuka Chemical Co., Ltd.Otsuka Chemical Co., Ltd.

Otsuka Advanced Conductive MaterialOtsuka Advanced Conductive Material

ss

Introduction ofIntroduction of

DENTALLDENTALL

DENTALL is Otsuka ceramic material

covered with nanometer thick conductive layers.


What is DENTALL? What is DENTALL?

Stable conductivity under various environmental expo

sures

Homogeneous conductivity

Excellent dispersability

Colorability for the white and transparent types

Conductivity over a wide range, which is consistent, an

d easy to control


Features of DENTALLFeatures of DENTALL

Engineering plastics reinforcement

Heat resistant material

Ion exchange material

Friction material

Precision filter

Functional material


Otsuka Ceramic Material's ApplicationOtsuka Ceramic Material's Application

Features of DENTALL WK-500Features of DENTALL WK-500- Conductivity over a wide range, which is consistent, and easy to control -- Conductivity over a wide range, which is consistent, and easy to control -

Surface resistance vs content in acrylic resin

10 20 30 40 50 60 70 80Pigment content in solid (wt%)

Su

rfac

e re

sist

ance

(

)

1010

109

108

107

106

105

104

103

102

DENTALL WK-500

Conductive Powder

* Coated on PET film - coating 20 micron thick, 30wt% DENTALL in acrylic binder.

General properties of DENTALL WK-500General properties of DENTALL WK-500

WK-500

Base materials TiO2

Resistance (Otsuka method)[] 100-1

Whiteness (Otsuka method) 79.0

Total luminous transmittance[%]* 25.0 max

True specific gravity 3.5-4.0

Bulk density [gr./cm3] 0.2-0.4

pH (dispersed in H2O) 3.0-5.0

Dispersability in H2O Excellent

Dispersability in Toluene OK

DENTALL WK500DENTALL WK500 - HS CODE & PACKING STYLE - HS CODE & PACKING STYLE

WK-500

HS Code 2823.00

Packing Fiber Drum

Net 20.0 kg

Gross 23.7 kg

Dimension (mm) 455×455×560H

Consistency of surface resistance within a section of PU coatd film containing with WK-500

Regularity of surface resistance

Su

rfac

e re

sist

ance

(

)

Measuring points

① ② ③ ④ ⑤

Measuring points

① ②

③

④ ⑤

100mm

100mm

106

105


Features of DENTALL- Homogeneous Conductivity -- Homogeneous Conductivity -

DENTALL WK-500 comparison between various ways of dispersion

Condition*Rotation : 2500 rpm*Binder : Acrylic type binder with WK-500*Solid content of WK-500 : 30%

Dispersion type

Ultrasonic dispersion for 5 min.

High speed mixer for 15 min.

Condition

recommended

recommended

Surface resistance /

6.0 × 105

5.0 × 105

not recommended

not recommended

2.0 × 106

over 2.0 × 106

Comparision exampleBall mill for 5 min. then high speed mixer for 15 min.Ball mill for 15 min. then high speed mixer for 15 min.


Features of DENTALLFeatures of DENTALL- Excellent dispersability -- Excellent dispersability -

Comparison data between DENTALL and other conductive materials for Whiteness and Total luminous transmittance

Typical Values Whiteness Total luminous transmittance* /%

*Condition Base : Coated on PET Film (Thickness : 100 micron) Binder : Acrylic / 30wt% content with 20 micron thickness

WK-500

TM-100

TM-200

BK-400W+TiO2 (0.1:1)

Conductive Silica

Conductive Tin oxide

79 min.

69

72

72

65

55

25 max.

81

83

－

49

68


Features of DENTALLFeatures of DENTALL- Colorability for the white and transparent types -- Colorability for the white and transparent types -

Conductive paint

Conductive adhesive

Conductive composite

Conductive film

Functional paper


Applications of DENTALLApplications of DENTALL

Automobile bumper

Clean room

Silicon wafer basket


Current Known Applications of DENTALLCurrent Known Applications of DENTALL

Acrylic binder / 40% solid

WK-500

Total

Surface resistance

Solid content

P/B

Viscosity

WK-500 content in solid

Acrylic binder: Auto Aclose Super FS clear made by DNT, Japan Dispersion condition: 2500 rpm×5 min. Thickness : 50 micron Dispersed by T.K. Homo Disper 2.5 made by Tokushukika Co., Japan

part

part

part

%

cp

%

90.9

9.1

100

2.0×109

45.5

0.25

1700

20

85.4

14.6

100

1.6×106

48.8

0.43

2000

30

78.9

21.1

100

1.3×105

52.7

0.67

2300

40

Conductivity over a wide range, which is consistent, and easy to control


DENTALL WK-500 Basic formulationDENTALL WK-500 Basic formulation

Grade Oil absorption rate (ml/100g)

WK-500 140

BK-400W 100

TM-100 143

Conductive Cabon black 740

TiO2 (JR-805) 33

Test method:JIS K-5101 Note) The figures for above are not standard, its just approximate reference.


Comparison Data regarding Oil Absorption RateComparison Data regarding Oil Absorption Rate

1012

1011

1010

109

108

107

106

105

104

103

102

10 10-1

10-2

10-3

10-4

Res

isti

vity

・

cm

Insulative material (plastic)

Semi insulative resin (polymer alloy)

Semi conductive material (electrostatic recording paper)(sensitized paper)

Antistatic material (flooring, wall, paint)

Resistance material(heating element, semi conductive layer for cables)

Conductive material (electro magnetic shield)

High conductive material (wiring material, metal)


Classification of ResistivityClassification of Resistivity

The Name of Interior PartsThe Name of Interior Parts


The Name of Parts - Automobiles -The Name of Parts - Automobiles -


The Name of Outer PartsThe Name of Outer Parts



The Name of Outer PartsThe Name of Outer Parts


Acid resistance (Dipping in under 10% HCl)W

hit

enes

s (L

val

ue)

Dipping time

Intial 7 days 14 days 21days 28daysvalue

85

80

75


Chemical Resistance of WK-500Chemical Resistance of WK-500- Acid Resistance -- Acid Resistance -

Alkaline resistance (Dipping in under 10% NaOH)P

owd

er r

esis

tan

ce (

)

Dipping time

Intial 7 days 14 days 21days 28daysvalue

101

100


Chemical Resistance of WK-500Chemical Resistance of WK-500- Alkaline Resistance -- Alkaline Resistance -

Measurement Point No.1





Note) Formulation : Acrylic binder / WK-500 = 70 : 30 (wight ratio)

4.96 × 106

1.18 × 107

1.26 × 107

1.33 × 107

1.40 × 107

1.06 × 106 1.

84 × 106 2.13

× 106 2.80 ×

106 3.40 × 106

(PET film and Non-coat paper)

Paper PET filmSurface resistance

Conclusion : In the case of paper, the paper absorbs the binder, and there is a lot of WK-500 on the surface. This facilitates the network contact between each WK-500 particle, and results in good surface conductivity. In the case of PET film, there is less WK-500 on the surface than in the case of paper due to WK-500 particles being homogeneously dispersed inside the coating layer. Therefore, apart from substrates, like paper and wood which can absorb the binder, there are no differences in the surface conductivity among the substrates.


Effects of substrates on surface conductivityEffects of substrates on surface conductivity

Su

rfac

eres

ista

nce

(

)

107

106

105

104

dry / wet cycle

Initial dry wet dry wet dry wet dry 5days 30days 60days value room condition

DENTALL compound No.1Current competitor’s material

Note) dry/wet conditions dry conditon : 100 ×2.5hrs.℃Wet condition : 98RH%×12hrs.

Formulation :1) WK-500(40wt%)/PVA, Total solid content 10wt%2) Zinc oxide(70wt%)/PVA, Total solid content 10wt%


Stability of Surface Resistance of Water-Borne Base Paint Stability of Surface Resistance of Water-Borne Base Paint Formulated with WK-500 under Dry/Wet Cycle ConditionsFormulated with WK-500 under Dry/Wet Cycle Conditions

We evaluated the primer application by using the folowing 4 formulations and assessed the surface resistance and adhesiveness.

1. Water base primer

2. Solvent base primer

3. Solvent non-halogen base primer

4. Solvent base primer(Pellet type)


WK-500 Primer Application EvaluationWK-500 Primer Application Evaluation

FormulationCPO / HARDLEN EH-202 (Water borne type) 83 WK-500 10 Dispersion agent (BYK-154) 2Anti foaming agent (BYK-032) 5

100 (parts) After formulation

Solid content 26.6%WK-500 content in Solid 37.6%Viscosity 50 cp

Painting method 1. Disperse the above formulation at the condition of 2,500rpm × 10 min. 2. Wipe the unpainted PP surface with IPA 3. Paint the above on PP by bar coater No.10 4. Dry this at 85 × ℃ 10 min.

Surface resistance (/□)2-5 × 106


WK-500 Primer Application EvaluationWK-500 Primer Application Evaluation- Water Base Primer -- Water Base Primer -

FormulationCPO / HARDLEN 13MLJ (Solvent type) 75 WK-500 10 Dispersion agent (BYK-P104S) 1Solvent (Xylene) 14




Surface resistance (/□)1-5 × 106


WK-500 Primer Application EvaluationWK-500 Primer Application Evaluation- Solvent Base Primer -- Solvent Base Primer -

FormulationCPO / HARDLEN MP-200 (non-halogen type) 75 WK-500 10 Dispersion agent (BYK-P104S) 1Solvent (Xylene) 5




Surface resistance (/□) 1-5 × 106


WK-500 Primer Application EvaluationWK-500 Primer Application Evaluation- Solvent Non-Halogen Base Primer -- Solvent Non-Halogen Base Primer -

FormulationCPO / HARDLEN CY-9122P (Pellet type) 17.5 WK-500 11.0 Dispersion agent (BYK-P104S) 1.5Solvent (Xylene) 70.0




Surface resistance (/□) 2-5 × 105


WK-500 Primer Application EvaluationWK-500 Primer Application Evaluation- Solvent Base Primer (Pellet type) -- Solvent Base Primer (Pellet type) -

Water base

Solvent base

Solvent non-halogen base

Solvent base (pellet type)

2-5 × 106

1-5 × 106

1-5 × 106

2-5 × 105

10

10

10

10

15-20

15-20

15-20

15-20

Formulation Surface resistance(/□)

AdhesivenessTest (JIS K-5400)

Paint thickness(micron)


WK-500 Primer Application EvaluationWK-500 Primer Application Evaluation- Evaluation Result -- Evaluation Result -

Formulation guidelineBinder Acrylic binder 22

Hardener 10Pigment DENTALL WK-500 12

TiO2

3 Solvent Butyl acetate 36

Xylene 14 Dispersion agent BYK P104S 3 100 (parts)

After formulation Solid content 30.8%WK-500 content in Solid 39.0%

Surface resistance 4 × 105 / □


DENTALL WK-500 Primer ApplicationDENTALL WK-500 Primer Application- m-PPE Base Primer -- m-PPE Base Primer -

Sectional plan

High resistive layer (1013-1016)

Conductive layer (PU, Acrylic + WK-500 : 105-107)

Paper, Cloth or PVC, PET

Conductive layer


DENTALL WK-500DENTALL WK-500Electrostatic Plotting & Printing ApplicationElectrostatic Plotting & Printing Application

Formulation guideline<A-component>

Epoxy resin (Epires ER-8 : Akzo) 20.00<B-component>

Curing agent (Epilink DP-660 : Akzo) 25.00Defoamer (BYK-031 : Byk) 0.50Wetting agent (BYK-181 : Byk) 1.00Thixotropic agent (Beneton EW- 3%in water : Kronos) 2.00Pigment (DENTALL WK-500 : Otsuka Chemical) 15.00Thinner (Water ) 36.50

Total 100.00

Solid content. 52.5%WK content.in solid. 28.6%Surface resistance. 6×107 Ω/□


DENTALL WK-500DENTALL WK-500Antistatic Flooring or Wall Material Antistatic Flooring or Wall Material

for use in a Semiconductor Factory, Clean roomfor use in a Semiconductor Factory, Clean room

Mixing method guideline

1. Curing agent (Epilink DP-660) 2. Water(0.5) 3. Defoamer (BYK-031)

4. Pigment (DENTALL WK-500) 5. Water(0.5)

1) Mix and disperse the following order

(1+2)→mixing→(+3)→mixing→(+4+5)→mixing

2) Add the above to Epoxy resin (Epires ER-8) and Disperse





Flooring or wall whose surface of concrete is covered by binder

(epoxy + DENTALL +pigment)

Guiding formulation : DENTALL WK-500/epoxy+DENTALL WK-500 = 30-40 wt%

Coated film thickness : 200 micronResistivity : 105-107 Compared with the currently used materials of Zinc oxide, DENTALL has the following merits :

Stable and homogeneous conductivityWide selectivity of conductivity



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