|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||106/309 ; 106/288B ; 106/308B ; 501/147|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 17 인용 특허 : 2|
A process for beneficiating a crude kaolinitic clay mineral to produce a clay filler for use in papermaking to improve the brightness, the color characteristics and the light scattering efficiency of the paper product. The crude kaolin clay is blunged with water containing a dispersing agent consisting of a blend of from about 20% to about 50% by weight of a water-soluble carbonate, about 20% to about 50% by weight of a water-soluble polyacrylate, and from 0% to about 60% by weight of a water-soluble anionic phosphate, to form a high solids fluid aqueous...
A process for treating a crude kaolinitic clay mineral comprising: a. forming a fluid aqueous suspension of crude kaolinitic clay mineral, said suspension having a solids content of at least about 65% by weight and an acid pH of at least about 5.5, said suspension containing a dispersing agent comprising from about 20% to about 50% by weight of a water-soluble carbonate, from about 20% to about 50% by weight of a water-soluble orgainic polyarylate, and from 0% to about 60% by weight of a water-soluble anionic phosphate; b. subjecting said suspension to a...