Please wait.'

Page is loading'


Home  > Forum  > Optimized formulations  > How to improve hiding power in emulsion pa...

Sunday, 21 April 2019

How to improve hiding power in emulsion paints?

11 Posts

Tuesday 23 May 2006 1:00:00 am

I'm having a problem in our water based paint range of products. We are using high percentage Tio2 in the formula and we are getting outstanding whitness, but the hiding power is week. How can we increase the hiding power without risking the whitness and without the need to increase the tio2 contene? Because it's already high?

Thanks for your help in advance

Sanaa

Author Message

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Tuesday 23 May 2006 1:00:00 am

Please try to grind the millbase in a grinding system like beadmill, basketmill etc. Try to use more efficient dispersing agent so you can have better dispersion at the same dispersion time. When the pigment particules are smaller the hiding power is higher for sure.
Regards,
Koray

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Wednesday 24 May 2006 1:00:00 am

What products are you trying to make exactly ?

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Wednesday 24 May 2006 1:00:00 am

Perhaps some cheap, inert cabonate filler would help the hiding power without effecting the whiteness?

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Wednesday 24 May 2006 1:00:00 am

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Wednesday 24 May 2006 1:00:00 am

Thanks for the help, my problem is in all the range flat ,egg shell and gloss emulsion paint , both Vinyl acetate and pure acrylic products, the Tio2 content is 13% minimum& up to 28%.
Thank you again for help
Sanaa

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Thursday 25 May 2006 1:00:00 am

For Gloss coatings you dont have a great deal of choice apart from choosing a good grade of titanium dioxide and possibly trialling a fine aluminium silicate.
For low sheen and flat coatings try using products such as Ropaque Ultra from Rohm and Haas in partnershiop with products such as fine particle size hydrous or calcined kaolin clays and you should find that your level of Titanium Dioxide is reduced to maintain a certain opacity or tinting power.
You can always play with your Rheology profile and volume solids to increase your applied opacity also.
Hope this helps to begin with

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Saturday 27 May 2006 1:00:00 am

I agree with the suggestion offered by Scott.
A great deal of help, assistance in understanding how each of these products work and their individual strengths and weaknesses can be obtained from a variety of companies web sites or Tech. Service departments.
Companies such as:
ROHM AND HAAS
ENGLEHARD (or any other significant kaolin producer)
OMYA (an excellent calcium carbonate producers and there are many others to consider)
RESIN SUPPLIER (any reputable or competent binder supplier)
There is generally a wealth of information available from these suppliers.

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Saturday 27 May 2006 1:00:00 am

I would encourage you to enquire about the Rohm and Haas acrylic called 'Ropaque'. It is a hollow binder that is formulated to dry white and improve coverage.
Suitable for interior only.
best regards
Ross Brinsdon

  • Currently 1 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 1/5 (1 votes cast)

Monday 13 November 2006 1:00:00 am

Could you contact me at wsas@ecsbelg.com with this question and some more specifics? I think I might be able to help.

Randy Weera

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Thursday 06 March 2014 12:25:48 pm

Dear All,

I'm having low hiding power with our water base acrylic wall primer/white color.
This primer use before painting on the surfaces/cement plaster wall/asbestos ceiling sheet
We can't increase TiO2 % due to cost factor.
Please suggest alternatives to improve hiding power.
It will be great help for us.

Regards,

Randy.

Brian Duhimbaze

  • Currently 0 out of 5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
Log in or create a user account to rate this page. Rating: 0/5 (0 votes cast)

Tuesday 28 July 2015 12:56:35 pm

It depends on what percentage of Titanium dioxide and the polymer emulsion you are using. If the percentage is about 18-20% and the PVC is about 35%, it should give you good hiding (95-98%) at 120µm wet film thickness.

top of page