Title: Liquid abrasive compositions containing a silicate suspending agent

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Claims: I claim:

1. A liquid abrasive composition comprising an aqueous suspension of about 25-60% of a substantially waterinsoluble particulate abrasive, about 3-8% of a nonionic surfactant and about 0.25-1.0% of suspending agent selected from natural and synthetic clays, hydrophobically treated clays, fumed silica, magnesium montmorillonite, and complex magnesium aluminum silicates.

2. A liquid abrasive composition as claimed in claim 1 wherein the particulate abrasive is of such particle size that, when dry, substantially all of it will pass through a sieve with apertures of 104 microns and at least 80% by weight passes through a sieve with apertures of 53 microns.

3. A liquid abrasive composition as claimed in claim 1 the abrasive of which is selected from calcite, silica and labradorite.

4. A liquid abrasive composition as claimed in claims 1 the nonionic surfactant of which is selected from dialkylolamides, condensation products of lower alkylene oxides with alkyl phenols, and mixtures thereof.

5. A liquid abrasive composition as claimed in claim 4 wherein the nonionic surfactant comprises coconut diethanolamide.

6. A liquid abrasive composition as claimed in claim 1 wherein the suspending agent is an inorganic complex silicate clay having the formula (Si.sub.8 Mg.sub.5.1 Li.sub.0.6 H.sub.7.6 O.sub.24).sup.0.6.sup.- Na.sup.+0.6.

7. A liquid abrasive composition as claimed in claim 1 which contains approximately 55% by weight of the particulate abrasive.

8. A liquid abrasive composition as claimed in claim 1 which contains 4-5% by weight of the nonionic surfactant.

9. A liquid abrasive composition as claimed in claim 1 which contains 0.3 - 0.5% of the suspending agent.

10. A liquid abrasive composition as claimed in claims 1 which also contains a humectant.

11. A liquid abrasive composition as claimed in claim 10 which contains 0.5 - 5% by weight of the humectant.

12. A liquid abrasive composition as claimed in claim 1 which also contains at least one additive selected from coloring agents, perfumes, bleaching agents and germicides.
Other info:

Inventors: Rayner, George Geoffrey (Eccles, EN)

Application Number: 479328
Filing Date: 1974-06-14
Publication_date: 1976-06-29
Assignee: Colgate-Palmolive Company (New York, NY)
Primary Class(es): 51/308 106/3, 510/238, 510/239, 510/281, 510/369, 510/386, 510/502, 510/507
Other Classes:
US Patent Ref:

1965299	Jul, 1934	Patterson	51/308.
2275049	Mar, 1942	Keller	51/308.
2944879	Jul, 1960	Allen et al.	51/308.
3020140	Feb, 1962	Bluth et al.	51/308.
3089764	May, 1963	Gorman	51/308.

Other Refs:
Primary Examiner: Arnold, Donald J.
Assistant Examiner:
Attorney: Baron; Steven J., Grill; Murray M., Sylvester; Herbert S.