Drug – bio-affecting and body treating compositions – Dentifrices
Patent
1990-10-29
1991-07-30
Chaudhuri, Olik
Drug, bio-affecting and body treating compositions
Dentifrices
A61K 716
Patent
active
050358790
ABSTRACT:
Amorphous 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 420 to 550 m.sup.2 /g, a weight mean particle size of 5 to 20 micron, a perspex abrasion value of 15 to 28, a mean pore diameter from 3 to 8 nm and a transmission of at least 70% in the R1 range from 1.444 to 1.460.
REFERENCES:
patent: 3977893 (1976-08-01), Wason
patent: 4294894 (1981-10-01), Vellucci
patent: 4612189 (1986-09-01), Oyobe et al.
Aldcroft Derek
Newton John R.
Stanier Peter W.
Chaudhuri Olik
Griffis Andrew
Unilever Patent Holdings BV
LandOfFree
Silicas does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silicas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silicas will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1541684