Zeolitic rock as a new pigment for ceiling paints. Influence of the pigment volume concentration

B. DEL AMO; C. DEYÁ; P. ZALBA

MICROPOROUS AND MESOPOROUS MATERIALS

Elsevier

Año: 2005 vol. 84 p. 353 - 356

1387-1811

 The performance of a zeolitic rock, mainly clinoptilolitic (heated at 350 C) is studied as humidity and ammonia adsorber in ceiling paints. the paints were formulated with 39% and 75% of zeolitic rock by volume of the total pigment content and 75% and 85% pigmenyt volume concentration (PVC). A blank, without zeolitic rock, was also formulated. The performance of the paints were assessed by gas (water and ammonia) adsorption and adsorption-desorption cycled tests. The results show that the paints containing zeolitic rock have better performance than the blank. Moreover, paints with 75% PVC behaved better than paints with PVC 85%. this behaviour may be due to the higher pigment cvontent because the paints with PVC 85% retain more water during the curing period diminishing their adsorption capacity.