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Methods of producing improved cleaning abrasives for dentifrices

A technology for abrasives, formulations, applied in chemical instruments and methods, dentistry, wet separation, etc., which can solve the problems of low wear level, no sacrifice of film cleaning ability, can not have, etc.

Inactive Publication Date: 2007-12-12
J M HUBER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the aforementioned product has excellent properties in these respects, it has been noted that it also suffers from the disadvantage of not being able to have a lower level of abrasion without sacrificing the film cleaning ability (especially for dentin prone to appear on the gum line). abrasive users), while potentially supplementing abrasive / cleaning silica products for more effective polishing and / or tooth whitening

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0042] In Examples 1 and 2, silica suitable for use in dentifrices as well as other products was prepared according to the invention.

Embodiment 1

[0043] The starting silica used in Example 1 was Comparative Sample A, ZEODENT(R) 103. Next, under the conditions shown in Table 1, the dried precipitated silica was passed through a high-efficiency centrifugal air classifier (Model 205) manufactured by CCE Technologies, Inc. (Cottage Grove, MN) several times for air classification.

Embodiment 2

[0044] The starting material used in Example 2 was Comparative Sample B, ZEODENT(R) 124 silica, which was ground first. Next, the ground precipitated silica was subjected to air classification under the conditions shown in Table 1.

[0045] Table 1

[0046] Example 1

Example 2

Rotor speed (rpm)

1550

1550

Flow rate ΔP(in.H 2 O)

4.5

4.5

Air Velocity (scfm)

247

247

Ejector pressure (psig)

50

50

Grading ΔP(in.Hg)

6.5

7.2

[0047] After being prepared as above, several properties of the granular silica (including median particle size, average particle size, particle size beta value, particle size span, % 325 mesh residue, BET surface area, CTAB surface area, oil adsorption and Einlehner wear).

[0048] Particle size was measured using a Model LA-910 laser scattering instrument available from Horiba Instruments (Boothwyn, Pennsylvania). A lase...

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Abstract

There is provided a method of making a precipitated silica abrasive composition having excellent cleaning performance and low abrasiveness, the method comprising post-reactor classification of abrasive particles by air classification techniques. By setting a specific particle size range, higher levels of film cleaning can be determined without increasing the dentin abrasive properties of the silica product itself. Accordingly, it is possible to provide dentifrices comprising the classified abrasive silica products which have particularly desirable cleaning benefits for improved tooth polishing, whitening, etc., without detrimental effects on tooth hard surfaces. The invention also includes the products resulting from the selective treatment process and dentifrices comprising the graded silica products.

Description

field of invention [0001] The present invention relates to a method of making abrasive compositions, and more particularly to a method of making precipitated silica abrasive compositions having excellent cleaning performance and lower abrasiveness, the method comprising passing through air classification techniques Post-reactor sizing is performed on the abrasive particles in operation. By setting a specific particle size range, it is believed that higher levels of pellicle film cleaning can be achieved without enhancing the dentin abrasive properties of the silica product itself. Accordingly, dentifrices comprising the graded abrasive silica products can be provided which have particularly desirable cleaning benefits to enhance tooth polishing, whitening, etc., without deleterious effects on tooth hard surfaces. Furthermore, the invention also includes the products resulting from this selective treatment process and dentifrices comprising this graded silica product. Backgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B07B9/00C01B33/12A61K8/00A61K8/18
CPCC01P2006/12A61K2800/28C09C1/3009A61Q11/00C01P2006/19A61K8/25A61K2800/412B07B9/00C01B33/12
Inventor P·D·麦克吉尔J·M·科尔尼厄斯
Owner J M HUBER CORP
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