improved pigment dispersion with micronized wax · public, improved pigment dispersion with...

Public

Christian LechnerBU AdditvesTechnical Marketing Waxes13.05.2013

Improved Pigment Dispersion with Micronized Wax

Christian Lechner, BU Additves, Technical Marketing Waxes, 13.05.2013

Content:

Public, Improved Pigment Dispersion with Micronized Wax2

– Trial Results with Ceridust in Masterbatch: PE, PP and Engineering Resins

– Processes of the Masterbatch Industry

– Clariant Waxes for Masterbatch Applications

– Improved Pigment Dispersion –Theory, Influence of the Particle Size

– Methods to Determine the Dispersion Quality

– Summary


Processes of Masterbatch Preparation- a Simplified Scheme

Components

Plastic

Pigment

Additivese.g. waxes

Cold mixing

Hot mixing

Premix-processmain-feeding

single/ twin/ multiple-screw

Split feed-processside-feeding

single/twin-screw

Special-processe.g. kneader

Strand pelletization− hot cut process

standard− cold cut process

standard − special process

under water

Premix Compounding Granulation

3 Public, Improved Pigment Dispersion with Micronized Wax


Clariant Waxes for Masterbatch Applications


Ceridust®

Micronized waxes

Amidewax

Montan-wax

PE-wax PP-wax


Advantages of Waxes for Masterbatch Production?

– Lower coloration costs

– Good pigment wetting

– Improved dispersion

– Increased pigment concentration

– Viscosity adjustment



The Clariant Wax Range

6

non-polar polar

oxidizedPolyethylene Waxes

Licocene PP MA 6252

Licocene PP MA 6452

Licocene PP MA 7452

Licocene PE MA 4221

Licocene PE MA 4351

Licocene® PP 6102

Licocene PP 1302

Licocene PP 1502

Licocene PP 1602

Licocene PP 2602

Licocene PP 6502

Licocene PP 7502

Ceridust® 6050 M

Licowax PE 130

Licowax PE 520

Liocwax PE 190

Licocene PE 4201

Ceridust 3620

Licowax C

Ceridust 3910

Licolub FA 1 powdervegetable based

Licolub WE 4

Licolub WE 40

Licolub WM 31

Licowax OP

Licowax E

Licomont® CaV 102

Licomont NaV 101

Ceridust 5551

modifiedPolypropylene/Polyethylene WaxesPolyethylene Waxes

Polypropylene Waxes

Polyolefin Waxes Amide Waxes Montan Waxes

Licolub H 4

HydrocarbonWax

Licolub CE 2 TP

Ceridust 8020 TP

highly modifiedPolymer Wax

® Trademark registered by Clariant in numerous countries®* Trademark licensed to Clariant in numerous countries1

Public, Improved Pigment Dispersion with Micronized Wax

Licowax® PED 191

Liocwax PED 521

Licolub® H 12

Ceridust 3715

Licocare SBW 11 TP

Wax on renewable basis


Improved Pigment Dispersion - Theory

Stabilization

Wax penetrates into the pigment agglomerates

Pigment Wetting

Dispersion


Wax breakes up of the pigment agglomerates

Wax prevents pigment particles from reagglomeration


Dispersing Aids- Influence of Particle Size

Pigment particleWax particle

uneven and varying coating of pigment particles

Wax particles are significantly bigger than pigment particles

Pigment- and wax particles show similar sizes

micronized conventional

e.g. high speedmixing, extrusion,kneading

Energy input(e.g. kneading

blocks)

Wax particles acting as distance keeper between pigment particles and also providing an optimum pigment wetting

F

F



Particle Size of Clariant Waxes


– Granules/flakes particle size between 4 to ~10 mm

– fine grain particle size: < 2 mm (mainly 0,6 – 0,8 mm)

– powder particle size: < 0,5 mm (mainly 0,15 – 0,25 mm)

– Ceridust® particle size: < 0,025 mm (mainly 10 – 20 µm)

recommended products for the production of masterbatches


Particle Sizes – a Comparison


Clariant Waxes

µm


The Ceridust® Range –Micronized Waxes from Clariant


non-polar polar

Ceridust® 3715

oxidizedPE-wax

Ceridust® 130Ceridust® 3620

PE-wax

PP-wax

PolyolefinWaxes

Ceridust® 6050 M TP

Ceridust®

Ceridust® 3910 Ceridust® 5551

New development:Highly polar modifiedPolymer WaxCeridust 8020

Amide Waxes

Montan Waxes

Compound-Waxes

Ceridust® 9615 A


Improved Pigment Dispersion - Theory

The reduction of agglomerates of pigments within the masterbatch is one main key factor in order to get a fine dispersion

– Important: Every pigment is showing a self-reliant characteristic of dispersion –prediction of the dispersion behavior is hardly possible

– determination and comparison of pigment-dispersion-quality:

- determination of the relative color yield (DIN 55986)

- reduction in screen filter blockage / filter pressure value (DIN EN 13900-5)

- determination of specks, spots and surface irregularitiesat the final article (e.g. blown film) (Clariant method)



Determination Methods- Filter Pressure Value

– Filter pressure value (FPV) is defined as an increase of the pressure [bar] per pigment in [g] and will be calculated according to:

– The lower the FPV [bar/g] the finer the dispersion of the pigment-particles in the polymer

FPV filter pressure value in [bar/g]

ps initial pressure in [bar]pmax maximum pressure in [bar]mC inserted amount of pigment in [g]

FPV = (pmax – ps) / mc



Determination Methods- Filter Pressure Value

– Typical pressure profile

1. initial stage2. initial pressure3. possible pressure decrease due to

various rheological properties4. variation of pressure dependent on test

compound 5. rinsing process with 100g virgin

polymer

p pressureps initial pressurepmax maximum pressuret timetS measurement of ps and fill in of the

test compoundtb complete feed end of test compoundte end of the record and determination

of pmax



Determination Methods- Relative Color Yield

− Determination of relative color yield (DIN 55 986)

production of a masterbatch-compound for injection molding

production of the color yield plates

measurement of the color yield, (X,Y,Z values, or L*a*b* values DIN 53 235 )



Determination Methods - Relative Color Yield

– Determination of the relative color yield (DIN 55 986)

- measurement of norm chromaticity (X,Y,Z) according e.g. DIN 53 235

- calculation of rel. color yield according to:

– The color yield (F) in [%] above 100 % means a higher color yield intensity of the test sample

F = mB/mP * 100 F rel. color yield in [%]mB amount of color pigment (base) in [g]mP amount of color pigment (test sample) in [g]



Determination Methods - Evaluation of the Film Quality

– Evaluation of the film quality via film note

– The lower the number of specks, spots and surface irregularities, the finer the dispersion of the pigment-particles in the polymer

Production of a masterbatch-compound for the film blowing line

Production of blown film virgin resin + 2 % of the masterbatches

from Up note0 5 16 10 1-211 100 2

101 200 2-3201 300 3301 400 3-4401 600 4601 1000 4-5

1001 ∞ 5

inspection of the film to identify undispersed particles



Trial Results with Ceridust in MasterbatchPE, PP and Engineering Resins

– Masterbatch quality tested according to before mentioned determination methods

- Filter pressure value

- Colour yield

- Film quality

– for different pigments in different resins with different waxes

– Investigation of additional influences on the dispersion:

- Amount of wax

- Kind of wax

- Hot mixture vs. cold mixture

- Extruder throughput



Influence of Particle Size and Amount of Wax

0

4

8

12

16

20

without wax 10 % LicowaxPE 520

15 % LicowaxPE 520

20 % LicowaxPE 520

15 % PE 520 +Ceridust 3620

(2:1)

20 % PE 520 +Ceridust 3620

(2:1)

Filte

r val

ue[b

ar/g

pig

men

t]

VN 86931 - 86941

filter value: DIN-EN 13900-5filter: 40 µm, 725 meshpremix: cold mix

– 30 % Fast blue A2R in LLDPE



Influence of Particle Size and Amount of Wax in LLDPE


VN 86196- 86203

90

100

110

120

130

140

0

2

4

6

8

10

12

14

without wax 20% LicowaxPE 520

30% LicowaxPE 520

20% PE 520 +Ceridust 3620

(2:1)

30% PE 520 +Ceridust 3620

(2:1)

rel.

colo

r yie

ld [%

]

Filte

r val

ue [b

ar/g

pig

men

t]

Filter pressureColor yield

– 40 % Pigment Red 57:1 + 30 % LLDPE (MFR 25)

filter value: DIN-EN 13900-5filter: 24 µm, 615 mesh premix: cold mixing color yield: DIN 55986


Influence of Extruder Throughput on the Dispersion


0

200

400

600

800

1000

1200

1400

0

0,2

0,4

0,6

0,8

1

1,2

1,4

30% Licowax PE520 powder

30 % PE 520 p+ Ceridust 3620

(2:1)

30% Licowax PE520 powder

30 % PE 520 p+ Ceridust 3620

(2:1)

Film

sur

face

irre

gula

ritie

s (s

pecs

) in

[num

ber]

Filte

r val

ue [b

ar/g

pig

men

t]

Filter valueNumber of specks

– 40 % Pigment Green 7 + 30 % LLDPE (MFR 25)15 kg/h 18 kg/h

film note : Clariant normpremix: cold mix

⇒ Lower Throughput = Better Dispersion

filter value: DIN-EN 13900-5filter: 14 µm, 724 mesh


Influence of the Particle Size

80

85

90

95

100

105

110

115

0

1

2

3

4

5

6

7

30 % Standard PP-Wax(1700 mPas)

20% Standard PP-Wax +10% Ceridust 6071

20% LicocenePP 6102 + 10% Ceridust

6050M

Rel

. col

oryi

eld

[%]

Filte

r val

ue[b

ar/g

pig

men

t]

Filter valueColor yield

Formulation: 40% Pigm.Red 48:2 (e.g.Lithol Scharlach K 4461); 20 - 30% wax; 30 - 40% PP, MFR 30.Extruder: ZE25x40D co-rotating; temp. profile: 180-200-190-170-150-170-190-180-175°C;

screw speed: 500 rpm; throughput: 5.0 kg/h; main feed

– Highly crystalline, low melting, low viscous, micronized PP wax gives the best results regarding dispersion in contrast to other PP waxes





1

2

3

4

5

6

0

2

4

6

8

10

20 % PP-Wax(1700 mPas)

20 % LicocenePP 6102 FG

13 % PP 6102 FG +7 % Ceridust 6050 M

13 % PP 1302 +7 % Ceridust 6050 M

Film

not

e

Filte

r val

ue [b

ar/g

Pig

men

t]

Filter valueFilm note

(excellent)

(bad)

VN 94186 – 94201 // 94295 – 298

– 40 % Pigment Yellow 155 + 40 % PP HG 245 (Borealis)

filter value: DIN-EN 13900-5filter: 14 µm, 725 mesh premix: hot mixing film note: Clariant norm



– 30 % Pigment Violett 19 + 40 % PP HG 245 (Borealis)


100

120

140

0

5

10

15

20

without wax 30 % PP-Wax (1700 mPas)+ Ceridust 6050M (2:1)

30 % Licocene PP 6102 +Ceridust 6050M (2:1)

Rel

. col

or y

ield

in [%

]

Filte

r val

ue[b

ar/g

Pig

men

t]

Filter valueColor yieldpremix: cold mixing color yield: DIN 55986

filter value: DIN-EN 13900-5filter: 25 µm


90

95

100

105

110

115

0

2,5

5

7,5

10

12,5

15% Standard PP wax FG 10 % Licocene PP 6102 +Ceridust 6050M (2:1)

15% Licocene PP 6102 +Ceridust 6050 M (2:1)

rel.

colo

r yie

ld [%

]

Filte

r val

ue [b

ar/g

Pig

men

t]



– 40 % Pigment Green 7 + 45 % PP HG 245 (Borealis)


premix: hot mixing filter value: DIN-EN 13900-5filter: 25 µm color yield: DIN 55986


95

100

105

110

115

120

0

2

4

6

8

10

20 % LicocenePP 6102 FG

13 %PP 6102 FG +7 % Ceridust

6050 M


6050 M


6050 M


6050 M

Rel

. col

oryi

eld

[%]

Filte

r val

ue [b

ar/g

pig

men

t]


Influence of Hot and Cold Mix on Dispersion

filter value: DIN-EN 13900-5filter: 14 µm, 724 mesh color yield: DIN 55986

– 40 % Pigment PV Fast Violet RL (violett 23) + 30 % PP powder (MFI 25 g/10 min)

hot mix =Initially better dispersion

cold mix



Improved Dispersion with Micronized Waxes in Engineering Resins - Polycarbonate

– 17 % Pigment Green 7 + 80 % PC powder


80

90

100

110

120

130

140

0

5

10

15

20

25

30

without 3 % Licowax E 3 % Ceridust5551

2 % Licowax E +1% Ceridust

5551

3% Licowax C

rel.

colo

r yie

ld [%

]

corr

elat

ed h

aze

Corr. HazeColor yieldcolor yield: DIN 55986premix: cold mixing

highest color yield with mixtureof Licowax E & Ceridust 5551

lowest correlated haze with Ceridust 5551


Improved Dispersion with Micronized Waxes in Engineering Resins - Polycarbonate


Sample preparation: Ultrafine sections of granules, thickness 60-80 nm; Cutter type Ultracut E (manufacturer Reichert+Jung, Germany)

No wax 3 % Licowax E 2 % Licowax E1 % Ceridust 5551

(colour yield = 100 %) (colour yield =117 %) (colour yield = 131 %)

– TEM photographs of polycarbonate + 17 % Pigment Green GNX samples– Magnification 4000


Improved Dispersion with Micronized Waxes in Engineering Resins - Polyester PET

– 30 % Pigment Green GNX + 70-65 % PET milled (intrinsic viscos. ~0,63)


90

100

110

120

130

0

4

8

12

16

1 % Licolub WE 4 3 % Licolub WE 4 5 % Licolub WE 4 2 % Licolub WE 4 +1 % Ceridust 5551

Rel

. col

oryi

eld

[%]

Filte

r val

ue [b

ar/g

pig

men

t]


VN 80211 - 80230



– 30 % Pigment Green 7 + 65 % PET (Bripet 2000 BST)


premix: cold mixingfilter value: DIN-EN 13900-5filter: PZ 14 color yield: DIN 55986

90

95

100

105

110

115

120

0

5

10

15

20

without wax 5 % Ceridust8020 TP

5 % LicolubCE 2 TP

5 % LicolubWE 4

5 % Ceridust5551

Rel

. col

or y

ield

in [%

](2

% in

Pol

ycle

ar 3

304)

Filte

r val

ue [b

ar/g

]


Licolub® CE 2 TP and Ceridust 8020 TP as a Potential Alternative to Montan Waxes


Improved Dispersion with Micronized Waxes in Engineering Resins – Polyamide 6

– 30 % Pigment Blue 15:1 A2R + 70 - 65 % PA milled


Extrusion: Barrel temp. 250-220-225-225-230-240-255-260-240°C, 500 rpm, 6.0 kg/h, cold mix - main dosedVN 82358 - 82367


100

110

120

130

140

0

5

10

15

20

without wax Licowax E3 %

Licowax E5 %

2 % CaV 102 +3 % Ceridust

5551

2 % CaV 102 +3 % Licowax E

Rel

. col

oryi

eld

[%]

Filte

r val

ue[b

ar/g

pig

men

t]



Summary

Ceridust® - products, which meet your demands and bring your ideas to success

– Micronized waxes provide important advantages in masterbatch preparation like:

- economical processing and cost compensation

- increased colour yield, reduced amount of(expensive) organic pigments necessary

- reduction of the agglomerates

- reduction in screen filter blockage

- reduction of specks, spots and surface defects

- suitable for the wide variety of pigments

- suitable micronized wax grades for every polymer


always a step ahead

with:Ceridust®

Public

Christian LechnerBU AdditvesTechnical Marketing Waxes13.05.2013

Thank you for your attention -

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improved pigment dispersion with micronized wax · public, improved pigment dispersion with...

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