Calcium depleted aluminum fluorosilicate glass powder for use in

Details Calcium depleted aluminum fluorosilicate glass powder for use in Calcium depleted aluminum fluorosilicate glass powder for use in

1982-01-04

1983-03-15

McCarthy, Helen M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

65 31, 106 35, 156663, 26099811, 428375, 428406, 428428, 433228, 501 39, 501 57, 501 63, 501 73, A61F 100, B32B 1700, B32B 1706, C08L 3302

Patent

active

043768350

ABSTRACT:
A calcium aluminum fluorosilicate glass powder is disclosed which has average particle size of at least 0.5 microns, and is characterized in that the calcium in the surface of the powder's particles is depleted so that the quotient of the atomic ratio Si/Ca at the surface of the particles and the atomic ratio Si/Ca in the core region of the particles is at least 2.0, more preferably at least 3.0 and most preferably at least 4.0. The glass powder may be prepared by surface treating calcium aluminum fluorosilicate glass powder particles with an acid which forms calcium salts, washing the calcium salts off the treated particles and drying the washed particles.
The glass powder has utility in self-hardening glass ionomer cements, such as dental or bone cements. Cements formed from the glass powder exhibit reduced periods of water sensitivity, while permitting sufficient time for processing.

REFERENCES:
patent: 3814717 (1974-06-01), Wilson et al.
patent: 3986998 (1976-10-01), Schmitt et al.
patent: 4063001 (1977-12-01), Zlochower
patent: 4209434 (1980-06-01), Wilson et al.
patent: 4215033 (1980-07-01), Bowen
patent: 4271057 (1981-06-01), Drake et al.
Wilson, A. D., "Alumino-Silicate Polyacrylic Acid and Related Cements" Br. Polym. J., May, 1974, 6 pp. 165-179.

Affiliated with

Also associated with

Rating

Calcium depleted aluminum fluorosilicate glass powder for use in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Calcium depleted aluminum fluorosilicate glass powder for use in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calcium depleted aluminum fluorosilicate glass powder for use in will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1658790