Talc for paint products and method of making the same
A talc slurry and a method of producing the talc slurry. A talc product includes the talc slurry having total solids (TS) 40% or higher and a dispersant agent and/or a thickener.
1. A method for producing a talc slurry for paint products, comprising:
granulating dry talc powder,
dispersing said granulated talc in water with dispersant chemicals to form a talc slurry,
adding base to achieve a pH-value of 9.0 or higher in the talc slurry, and
adding thickener to the talc slurry,
wherein said talc slurry has:
a total solids (TS) content of 40% or higher, and
a unimodal particle size distribution between 1 to 50 μm.
2. The method according to claim 1 , further comprising sieving the talc slurry.
3. The method according to claim 1 , wherein said talc slurry has at least one peak of particle size distribution between 1 to 5 μm.
4. The method according to claim 1 , wherein said talc slurry has at least one peak of particle size distribution between 5 to 20 μm.
5. The method according to claim 1 , wherein said talc slurry has at least one peak of particle size distribution between 10 to 50 μm.
6. The method according to claim 1 , wherein the total solids (TS) content of said talc slurry is 50% or higher.
7. The method according to claim 1 , wherein said talc slurry has a storage stability of 10% or below.
8. The method according to claim 1 , wherein the total solids (TS) content of said talc slurry is 60% or higher.
9. The method according to claim 1 , wherein said talc slurry has a viscosity of 300 to 600 mPas.
10. A method for producing a talc slurry for paint products, comprising:
granulating dry talc powder,
dispersing said granulated talc in water with dispersant chemicals to form a talc slurry,
adding base to achieve a pH-value of 9.0 or higher in the talc slurry, and
adding thickener to the talc slurry,
wherein said talc slurry has:
a total solids (TS) content of 40% or higher, and
a multimodal particle size distribution between 1 to 50 μm.
11. The method according to claim 10 , further comprising sieving the talc slurry.
12. The method according to claim 10 , wherein said talc slurry has at least one peak of particle size distribution between 1 to 5 μm.
13. The method according to claim 10 , wherein said talc slurry has at least two peaks of particle size distribution between 1 to 50 μm.
14. The method according to claim 10 , wherein said talc slurry has at least one peak of particle size distribution between 5 to 20 μm.
15. The method according to claim 10 , wherein said talc slurry has at least one peak of particle size distribution between 10 to 50 μm.
16. The method according to claim 10 , wherein the total solids (TS) content of said talc slurry is 50% or higher.
17. The method according to claim 10 , wherein said talc slurry has a storage stability of 10% or below.
18. The method according to claim 10 , wherein the total solids (TS) content of said talc slurry is 60% or higher.
19. The method according to claim 10 , wherein said talc slurry has a viscosity of 300 to 600 mPas.