Gypsum plasterboard with a coating slip and method of manufacturing
View Patent ↗A gypsum plasterboard with a covering paper forming the outside of the plasterboard and a coating slip deposited on the covering paper. The coating slip has plastic pigments as whitening agent.
1. A plasterboard, comprising: at least one facing paper forming the exterior of the plasterboard; and, a coating slip deposited on the facing paper, the coating slip comprising
a) at least 25% of at least one filler;
b) a sufficient quantity of water;
c) a dispersing agent;
d) a defoamer;
e) at least 8% of at least one binder;
f) an insolubilising agent
g) a biocide; and
h) plastic pigments as whitening agents.
2. The plasterboard of claim 1 , wherein the coating slip is at least 5% by weight of plastic pigments.
3. The plasterboard of claim 1 , wherein the coating slip is between 5% and 40% by weight of plastic pigments.
4. The plasterboard of claim 1 , wherein the coating slip is approximately 13% by weight of plastic pigments.
5. The plasterboard of claim 1 , wherein the coating slip is deposited in the proportion of approximately 10 to 45 g/m 2 .
6. The plasterboard of claim 1 , wherein the plastic pigments are selected from the group consisting of plastic pigments with filled particles, plastic pigments with hollow particles or any combination thereof.
7. The plasterboard of claim 1 , wherein the at least one binder is formed from at least one synthetic latex, the binder being at least 10% by weight.
8. The plasterboard of claim 7 , wherein the at least one synthetic latex is at least 15% by weight.
9. The plasterboard of claim 1 , wherein the binder contains styrene-butadiene.
10. The plasterboard of claim 1 , wherein the coating slip further comprises titanium dioxide in the proportion of approximately 10% by weight.
11. The plasterboard of claim 1 , wherein the coating slip further comprises sodium hydroxide.
12. The plasterboard of claim 1 , wherein the coating slip further comprises ammonium.
13. The plasterboard of claim 1 , wherein the coating slip further comprises oxidized maize starch.
14. A coating slip designed to be coated on the upper layer of a facing paper of a plasterboard, the coating slip comprising:
a) at least 25% of at least one filler;
b) a sufficient quantity of water;
c) a dispersing agent;
d) a defoamer;
e) at least 8% of at least one binder;
f) an insolubilising agent; and
g) a biocide; and,
h) plastic pigments as whitening agents.
15. The coating slip of claim 14 , wherein the binder is formed from a synthetic latex or a combination of synthetic latexes, the binder being incorporated in the coating slip in the proportion of at least 10% by weight.
16. The coating slip of claim 15 , wherein the synthetic latex or the combination of synthetic latexes are incorporated in the proportion of at least 15% by weight in the coating slip.
17. The coating slip of claim 15 , wherein the binder contains styrene-butadiene.
18. The coating slip of claim 14 , wherein the coating slip further comprises titanium dioxide in a proportion of approximately 10% by weight.
19. The coating slip of claim 14 , wherein the coating slip further comprises sodium hydroxide.
20. The coating slip of claim 14 , wherein the coating slip further comprises ammonium.
21. The coating slip of claim 14 , wherein the coating slip further comprises oxidised maize starch.