|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 3 인용 특허 : 22|
The present invention provides a high solids mineral slurry having long term stability and a method for producing the same. Specifically, the present invention provides a talc slurry having a solids content of up to 65% and a stability against sedimentation for up to 100 days. The talc slurry of the present invention comprises a phyllosilicate mineral, a chelating agent and multivalent ions, wherein the slurry has a pH of between about 10.2 and about 11.8.
What is claimed is: 1. A stable talc slurry, comprising: water; between about 50% and about 80% talc by weight; sodium hydroxide; between about 50 ppm and about 850 ppm citric acid; between about 700 ppm and about 1300 ppm magnesium sulfate heptahydrate; wherein the slurry has a pH of between about 10.2 and about 11.8 and the slurry is stable without agitation for at least about 25 days. 2. A method of making a phyllosilicate mineral mineral slurry, comprising: adding a phyllosilicate mineral to a solvent to produce a substantially homogeneous high s...