SILICAS

• Main Authors: PETER, WILLIAM STANIER, DEREK, ALDCROFT
• Format: Patent
• Language: English; Korean
• Published: 15.01.1999
• Edition: 6
• Subjects: ADHESIVES; CHEMISTRY; COMPOUNDS THEREOF; DYES; HUMAN NECESSITIES; HYGIENE; INORGANIC CHEMISTRY; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-METALLIC ELEMENTS; PAINTS; POLISHES; PREPARATION OF CARBON BLACK; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

투명성 치약의 연마제용으로 적합한 무정형 실리카는 침전 공정에 의해 제조될 수 있다. 이들 실리카는, BET 표면적이 10 내지 90 ㎡/g 이고, 중량 평균 입자 크기가 5 내지 15 미크론이고, 플라스틱 연마값이 16 내지 26이고, 1.430 내지 1.443의 RI 영역에서의 투광률이 최소 70% 이고, 오일 흡수도가 약 70 내지 약 150 ㎤/100g 인 것에 의해 특징지어진다. PCT No. PCT/EP93/03006 Sec. 371 Date Jun. 1, 1995 Sec. 102(e) Date Jun. 1, 1995 PCT Filed Oct. 26, 1993 PCT Pub. No. WO94/10087 PCT Pub. Date May 11, 1994Amorphous silicas suitable for use as abrasives in transparent toothpastes can be prepared by a precipitation route. These silicas are distinguished by having a BET surface area of 10 to 90 M2/g, a weight mean particle size of 5 to 15 micron, and a plastics abrasion value of 16 to 20, a transmission of at least 70% in the RI range from 1,430 to 1,443 and an oil absorbtion in the range from about 70 to about 150 cm3/100 g.