Low-RDA friction type silicon dioxide and preparation method thereof

The invention belongs to the technical field of silicon dioxide, and particularly relates to low-RDA friction type silicon dioxide and a preparation method thereof. According to the method, a sodium silicate solution with the modulus of 3 and the concentration of 0.71-0.77 mol/L is adopted for react...

Full description

Saved in:
Bibliographic Details
Main Authors HOU CANMING, LIN CHAOCONG, HU FEI, MA YIMIN, ZHANG WENZHENG
Format Patent
LanguageChinese
English
Published 26.01.2021
Subjects
CHEMISTRY
COMPOUNDS THEREOF
HUMAN NECESSITIES
HYGIENE
INORGANIC CHEMISTRY
MEDICAL OR VETERINARY SCIENCE
METALLURGY
NON-METALLIC ELEMENTS
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS
Online AccessGet full text

Cover

More Information
Summary:The invention belongs to the technical field of silicon dioxide, and particularly relates to low-RDA friction type silicon dioxide and a preparation method thereof. According to the method, a sodium silicate solution with the modulus of 3 and the concentration of 0.71-0.77 mol/L is adopted for reaction, neutralization reaction is carried out by dropwise adding alkali into acid, and a silane coupling agent KH570 is added in the process, so that the low-RDA friction type silicon dioxide is prepared. The copper consumption value of the prepared friction type silicon dioxide in 15% dispersion liquid of sorbitol with the concentration of 70% can be as low as 1.2 mg in 10000 times of brushing and grinding, the RDA value is 120-130, the water absorption capacity is 12-16 mL/20 g, the oil absorption value is 86-101 mL/100 g, the apparent density is 0.47-0.51 g/mL, and the friction capacity of the silicon dioxide is reduced. A toothpaste prepared from the silicon dioxide provided by the invention is suitable for the e
Bibliography:Application Number: CN202011146012