| 摘要 |
PURPOSE:To obtain the excellent dispersion stability in the various fine powder and to enable the redispersion by means of the stirring even when the fine powder is settled by blending the water insoluble fine powder, neucleic acid and water to prepare a dispersant. CONSTITUTION:A dispersant is prepared by mixing about 0.1-90wt% water insoluble fine powder, about 99.9-5wt% water and about 0.0001-1wt% neucleic acid. The water insoluble fine powder is the fine powder which is insoluble or hardly soluble in water and both organic powder and inorganic powder are contained and for example, titania, iron oxide, zinc oxide and clay, etc., are used as the inorganic fine powder and the insoluble azo dye and anthraquinone disperse dye, etc., are used as the organic fine powder. Deoxyribonucleic acid and ribonucleic acid are adopted as neucleic acid and the acid of about >=100,000mol.wt., especially about >=500,000mol.wt. is preferable. |
