Fibrous structured amorphous silica including precipitated calcium carbonate and compositions of matter made therewith
AssigneePacific Nano Products, Inc.
InventorVijay K Mathur
Life of this patent
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Abstract
A nano-composite structure. A synthetic nano-composite is described having a first component including a fibrous structured amorphous silica structure, and a second component including a precipitated calcium carbonate structure developed by pressure carbonation. The nano-composite may be useful for fillers in paints and coatings. Also, the nano-composite may be useful in coatings used in the manufacture of paper products.
Claims45
A coating composition for coating paper, paperboard, or label stock, said coating composition comprising a water slurry including
- (a) a nano-composite material, said nano-composite material comprising an amorphous silica component, said amorphous silica component provided in three-dimensional haystack or globular configuration that presents a structure having interstitial spaces between amorphous silica structures with inner layers and outer layers with irregular interlacing amorphous silica structures or filaments which are fixed in relation to each other, and a crystalline calcium carbonate component, said crystalline calcium carbonate component comprising nano aragonite needle structures, said nano aragonite needle structures arising from said amorphous silica component, said nano-composite material having a major axis of length L in the range from 10 microns to 40 microns and a surface area of from 40 meters squared per gram to 200 meters squared per gram;
- (b) clay;
- and
- (c) wherein said coating composition, after mixing, passes through a screen of selected size.
A coated, calendared, paperboard, comprising:
- (a) one or more layers of kraft pulp;
- (b) a base coating, said base coating comprising a coating composition including
- (1) a nano-composite material, said nano-composite material comprising an amorphous silica component, said amorphous silica component provided in three-dimensional haystack or globular configuration that presents a fibrous structure having interstitial spaces between amorphous silica components with inner layers and outer layers with irregular interlacing amorphous silica components or filaments which are fixed in relation to each other, and a crystalline calcium carbonate component, said crystalline calcium carbonate component comprising nano aragonite needle structures, said nano aragonite needle structures arising from said amorphous silica component, said nano-composite material having a major axis of length L in the range from 10 microns to 40 microns and a surface area of from 40 meters squared per gram to 200 meters squared per gram;
- and
- (2) clay.
Paper, comprising paper, paperboard, or label stock, and a coating composition,
- said coating composition comprising:
- (a) a nano-composite material, said nano-composite material comprising an amorphous silica component, said amorphous silica component provided in three-dimensional haystack or globular configuration that presents a fibrous structure having interstitial spaces between amorphous silica components with inner layers and outer layers with irregular interlacing amorphous silica components or filaments which are fixed in relation to each other, and a crystalline calcium carbonate component, said crystalline calcium carbonate component comprising nano aragonite needle structures, said nano aragonite needle structures arising from said amorphous silica component, said nano-composite material having a major axis of length L in the range from 10 microns to 40 microns and a surface area of from 40 meters squared per gram to 200 meters squared per gram;
- (b) clay;
- and
- (c) said coating composition, after mixing, passes through a 100 mesh screen.
Dependencies are inferred from the claim text.