|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||C09D-003/20 C04B-014/00 C04B-033/00|
|미국특허분류(USC)||106/308N ; 106/288B ; 106/214 ; 209/5|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 29 인용 특허 : 0|
A highly bulked kaolin pigment is prepared by mixing a small but effective amount of a water-soluble cationic polyelectrolyte flocculant with a kaolin clay pigment in the presence of water to prepare a bulked clay pigment product. Upon dewatering, the resultant polyelectrolyte treated clay product can be dispersed to form high solids clay-water slurries useful in making aqueous coating colors suitable for manufacturing coating lightweight publication papers or the pigment can be used as a filler for paper webs.
A novel opacifying pigment composition consisting essentially of particles of hydrous kaolin clay flocculated with a minor amount of a cationic polyelectrolyte flocculant, said particles of clay having a particle size distribution such that less than 35% by weight are finer than 0.3 micrometers prior to being flocculated, said pigment having a G.E. brightness of at least 85%, and scattering values at 457 nm and 577 nm higher than that of said clay in the absence of said polyelectrolyte, said pigment being capable of being formed into a 62% solids fluid s...