초록 ▼

A heat stabilized slurry of bulked kaolin pigment is prepared by mixing a small but effective amount of a water-soluble cationic material such as a cationic polyelectrolyte flocculant with a kaolin clay pigment in the presence of water. The resultant bulked clay product is dispersed to form a high s

A heat stabilized slurry of bulked kaolin pigment is prepared by mixing a small but effective amount of a water-soluble cationic material such as a cationic polyelectrolyte flocculant with a kaolin clay pigment in the presence of water. The resultant bulked clay product is dispersed to form a high solids clay-water slurry useful in making aqueous coating colors suitable for manufacturing lightweight coated publication papers or the pigment can be used as a filler for paper webs. Slurries having stable viscosity during storage at elevated temperature and improved resistance to the formation of sediment are prepared by using as the dispersant a combination of an anionic lignosulfonate and an anionic naphthalene sulfonate formaldehyde complex in combination with a polyacrylate salt.

대표청구항 ▼

A heat stabilized dispersed slurry of particles of chemically bulked hydrous kaolin clay pigment obtained by adding a water soluble cationic material to particles of hydrous kaolin clay in the presence of water to flocculate the particles of clay, the dispersant in said slurry comprising an effectiv

A heat stabilized dispersed slurry of particles of chemically bulked hydrous kaolin clay pigment obtained by adding a water soluble cationic material to particles of hydrous kaolin clay in the presence of water to flocculate the particles of clay, the dispersant in said slurry comprising an effective amount of the combination of a water-soluble polyacrylate salt, a water-soluble lignosulfonate and a water-soluble naphthalene sulfonate formaldehyde complex to disperse the flocculated hydrous kaolin clay pigment wherein said slurry is free from a polyphosphate dispersant.