Pigment composition for paint
AssigneeUnimin Corporation
InventorsScott Van Remortel, Christopher Capobianco, Thomas Gallo
Life of this patent
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Abstract
A pigment extender that can be used in a covering agent such as paint to improve the properties of the paint. The pigment extender can improve the hiding power of many types of paint formulations. The pigment extender is particularly useful in flat paints that require relatively low sheen values. A pigment extender that includes microcrystalline silica, nepheline syenite and/or metal fluoride. The metal fluoride typically includes a silica coated metal fluoride.
Claims51
A pigment extender adapted for use in a covering agent, said pigment extender comprising metal fluoride particles, said metal fluoride particles including particles having a majority weight percent silica plus fluoride compound, said silica constituting up to about 50 weight percent of said metal fluoride particles and said fluoride compound constituting up to about 99.9 weight percent of said metal fluoride particles.
A pigment extender adapted for use in a covering agent, said pigment extender comprising nepheline syenite and metal fluoride particle, said metal fluoride particles include particles having a composition of about 0.1-50 weight percent silica and about 50-99.9 weight percent metal fluoride.
A paint having an 85 sheen value of less than about 2 comprising a pigment and a pigment extender, said pigment extender comprising nepheline syenite and metal fluoride particles, said metal fluoride particles include particles having a composition of about 0.1-50 weight percent silica and about 50-99.9 weight percent metal fluoride.
A method for forming a paint having improved hiding power and low sheen comprising:
- a. providing a latex paint;
- b. adding a pigment and a pigment extender to said latex paint, said pigment extender comprising a nepheline syenite and metal fluoride particle, said metal fluoride particles include particles having a composition of about 0.1-50 weight percent silica and about 50-99.9 weight percent metal fluoride.
A paint comprising a pigment and a pigment extender, said pigment extender comprising metal fluoride particles, said metal fluoride particles including particles having a majority weight percent silica plus fluoride compound, said silica constituting up to about 50 weight percent of said metal fluoride particles and said fluoride compound constituting up to about 99.9 weight percent of said metal fluoride particles.
Dependencies are inferred from the claim text.