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  Home -> Products -> Fillers -> Lithopone -> Light fast white

                                                                              Lithopone
Properties:
Lithopone is the ideal combination of the white  pigment zinc sulfide  and the white  spacer Blanc fixe. Due to the particle  distribution of the ZnS (0.35 µm) and BaSO4 (0.8 -1.0 µm), which is the result of a co-precipitation (not  mixing) and  co-calcination,  a high  packing  density  is achieved,  which  in  turn  gives Lithopone  its  low resin  demand  and  excellent  rheological  properties.
CAS NO.: 1345-5-07   Molecular Formula : ZnS+BaSO4
Technical data:  

                                     Type

Light fast white

Light fast white

Testing Method

 

 

      Item

For Plastic

For Oil

For PVC

Methods

 

 

Color, Compared with the Sample

No less than

No less than

No less than

No less than

GB/T 1864-1989

 

 

Reducing power, Compared with the sample

100

100

100

100

GB/T 5211.16-1988

 

 

Oil absorption, g/100g

9

9

10

10

GB/T 5211.15-1988

 

 

PH Value

6.0-8.0

7.0-9.0

6.0-8.0

6.0-8.0

GB/T 1717-1986

 

 

105  VOCs, %

0.4

0.4

0.4

0.4

GB/T 5211.3-1985

 

 

 Water soluble matter, %

0.5

0.5

0.5

0.5

GB/T 5211.2-1985

 

 

45um Residue, %

0.05

0.05

0.05

0.05

GB/T 5211.18-1988

 

 

Particle Size D97, μm

2

2

2

7

GB/T 19077.1-2008

 

 

Whiteness, %

95

95

95

95

GB/T 5950-1996

 

 

Main Application

Universal

Plastic

Oil

PVC

 

                      

                                                                                          

                                                                                                    Particle size distribution

 

                                                   

 

                            

                                                                                             scanning Mircoscope Observation

                               

                                                                                   

 

Application:
1.  Due to  its rheological and optical  properties,  Lithopone offers  technical  and economic advantages  wherever  organic  and inorganic  resin systems need to be  relatively   highly   pigmented  for   specific  applications.  Lithopone  has therefore traditionally  been  used  in  putties,   mastics, jointing and  sealing compounds, primers, undercoats and marking  paints. In powder  coatings it is possible to replace TiO2 partially, very economically.
2.  The low  Mohs'  hardness of  Lithopone  leads to  low abrasiveness in comparison  with   TiO2. 
3.  Lithopone 30 % (= 30% zinc sulfide share) is proven to be of particular use as a TiO2  Substitute  in thermoplastic masterbatches. Even at very high  pigment loadings  it disperses easily. A masterbatch  containing 50 %  TiO2  and  25 % Lithopone 30 % DS has the  same hiding  power  as one containing 60 %TiO2. Cost savings are strongly  related  to the price ratio  of Lithopone and TiO2  and the price of for example polyethylene or polypropylene.
4.  The Lithopone batch has a much higher  extrusion  rate  too.  Furthermore the impact strength  of many thermoplastics  such as PP and ABS can be noticeably improved by using    Lithopone  as a TiO2 substitute. Generally spoken, Lithopone can be used at  loadings  up  to  80 %  by weight without causing polymer  breakdown.

 

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