BIOCIDAL COMPOSITIONS AND RELATED METHODS
A biocidal composition may include perlite and a biocidal metal compound associated with the perlite. The perlite may have a top particle size (d 50 ) less than 50 μm and a median particle size (d 50 ) less than 30 μm, and the perlite may range from 0.1 percent to 20 percent by weight of the composition. A dentifrice composition may include perlite and a biocidal metal compound associated with the perlite. The perlite may have a top particle size (d 50 ) less than 50 μm, a median particle size (d 50 ) less than 30 μm, and exhibit an RDA value less than 220. The composition may include a toothpaste base. A method of making a biocidal composition may include providing perlite and contacting the perlite with a biocidal metal compound to form biocidal metal-treated perlite.
1 . A biocidal composition comprising:
perlite; and
a biocidal metal compound associated with the perlite,
wherein the perlite has a top particle size (d 90 ) less than 50 μm and a median particle size (d 50 ) less than 30 μm, and
wherein the perlite ranges from 0.1 percent to 20 percent by weight of the composition.
2 . The composition of claim 1 , wherein the perlite comprises expanded perlite.
3 . The composition of claim 1 , wherein the perlite comprises milled and classified, expanded perlite.
4 . The composition of claim 1 , wherein the perlite comprises unexpanded perlite.
5 . The composition of claim 1 , wherein the biocidal metal compound comprises at least one of zinc, copper, and silver.
6 . The composition of claim 5 , wherein the biocidal metal compound comprises zinc oxide.
7 . The composition of claim 5 , wherein the biocidal metal compound comprises biocidal metal compound particles, and wherein the biocidal metal compound particles are attached to a surface of the perlite and have a particle size less than 250 nm.
8 - 16 . (canceled)
17 . The composition of claim 1 , wherein the biocidal metal compound ranges from 1 percent to 20 percent by weight of the composition.
18 - 19 . (canceled)
20 . The composition of claim 1 , wherein the perlite has a top particle size (d 90 ) less than 40 μm.
21 - 23 . (canceled)
24 . The composition of claim 1 , wherein the perlite ranges from 0.1 percent to 5 percent by weight of the composition.
25 . (canceled)
26 . The composition of claim 1 , wherein the biocidal composition exhibits an RDA value less than 200.
27 - 28 . (canceled)
29 . The composition of claim 1 , wherein the biocidal composition exhibits an RDA value less than 80.
30 - 33 . (canceled)
34 . The composition of claim 1 , further comprising a toothpaste base.
35 - 42 . (canceled)
43 . A dentifrice composition comprising:
perlite; and
a biocidal metal compound associated with the perlite,
wherein the perlite has a top particle size (d 90 ) less than 50 μm, a median particle size (d 50 ) less than 30 μm, and the dentifrice composition exhibits an RDA value less than 200.
44 . The composition of claim 43 , wherein the perlite comprises expanded perlite.
45 - 46 . (canceled)
47 . The composition of claim 43 , wherein the biocidal metal compound comprises at least one of zinc, copper, and silver.
48 . The composition of claim 47 , wherein the biocidal metal compound comprises zinc oxide.
49 . (canceled)
50 . The composition of claim 43 , wherein the biocidal metal compound ranges from 1 percent to 10 percent by weight of the composition.
51 . (canceled)
52 . The composition of claim 43 , wherein the perlite has a top particle size (d 90 ) less than 40 μm.
53 - 64 . (canceled)
65 . A method of making a biocidal composition, the method comprising;
providing perlite; and
contacting the perlite with a biocidal metal compound to form biocidal metal-treated perlite,
wherein providing the perlite comprises providing perlite having a top particle size (d 90 ) less than 50 μm and a median particle size (d 50 ) less than 30 μm, and
wherein the perlite ranges from 0.1 percent to 20 percent by weight of the composition.
66 - 79 . (canceled)