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Fibrous structured amorphous silica including precipitated calcium carbonate, compositions of matter made therefrom, and methods of use thereof

A technology of amorphous silica and fiber structure, applied in fibrous fillers, fiber raw material processing, papermaking, etc., can solve the problems of fillers and/or pigments being limited, not developed, not recognized, etc.

Active Publication Date: 2017-12-08
G R TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, he did not develop a product of the size and certain properties that would provide suitable properties for use in the high performance paper coatings described herein
Moreover, he failed to realize that by carefully controlling the reaction conditions, the fixation of calcium carbonate relative to the amorphous silica substrate could be selectively determined, and that doing so enhanced the properties offered by such products, especially for high performance paper coatings. Covering composition
[0014] In general, the fillers and / or pigments just discussed generally have a limited effect

Method used

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  • Fibrous structured amorphous silica including precipitated calcium carbonate, compositions of matter made therefrom, and methods of use thereof
  • Fibrous structured amorphous silica including precipitated calcium carbonate, compositions of matter made therefrom, and methods of use thereof
  • Fibrous structured amorphous silica including precipitated calcium carbonate, compositions of matter made therefrom, and methods of use thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0104] Several process steps can be used in the preparation of the unique nanocomposite materials described herein. From the most basic point of view, there are two steps, such as Figure 25 The two pieces shown. In a first step, one or more selected synthetic silicate hydrates are prepared by hydrothermal reaction of a calcareous material, such as lime, with a siliceous material, such as quartz or diatomaceous earth ("DE"). In the second step, the freshly prepared one or more selected calcium silicate hydrates are carbonated under pressure to produce a nanocomposite comprising amorphous silica and additional crystalline calcium carbonate structure, the amorphous silica is generally formed in the form of a prior crystalline calcium silicate hydrate which in one embodiment occurs as an aragonite phase. In one embodiment, the process can be performed in a pressurized reactor.

[0105] The preparation of suitable nanocomposite materials involves reacting carbon dioxide with sy...

Embodiment 1

[0182] Example 1 - Manufacture of novel nanocomposites (SAS & FCA)

[0183] step 1 : Preparation of Synthetic Calcium Silicate Hydrate-Xonotlite

[0184]Initially, 117.4 g of 1 / 2" spin pebble lime (from Graymont Lime Co.) was accurately weighed and aged in 350 mL of ultrapure water prepared by reverse osmosis treatment. The curing reaction was exothermic and caused slurry The temperature was raised to near boiling. When the slurry temperature was very close to boiling and before a large amount of water evaporated, an additional 90 ml of water was added to dilute and cool the slurry at the same time. The slurry was then stirred for 30 minutes to ensure ripening was complete. Then, The slurry was screened through a 100 mesh screen. The slurry was then transferred to a 5 L autoclave and tested for lime availability according to ASTM method C25 entitled "Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime" Weigh about 137.2g of fine fused ca...

Embodiment 2

[0220] Example 2 - Manufacture of novel nanocomposites (SAS & FCA)

[0221] step 1 : Preparation of Synthetic Calcium Silicate Hydrate-Xonotlite

[0222] The heterogeneous calcium silicate hydrate was formed by means of the hydrothermal reaction of lime and silica as described in Example 1. The difference from Example 1 is that the silica source used in Example 2 is non-calcined diatomite or natural diatomite. The sample is labeled as batch #MN-2. The process conditions used to prepare the samples identified as Batch #MN-2 are given in Table 12. The pigment properties of the sample identified as Lot #MN-2 are given in Table 13.

[0223] Table 12: Process conditions for xonotlite (MN-2) formation

[0224]

[0225] Table 13: Properties of xonotlite (MN-2)

[0226] batch#

[0227] A picture of the XRD pattern of this crystalline xonotlite sample is at Figure 27 given in. The SEM photograph of the crystalline xonotlite sample is in Figure 26 given in.

...

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Abstract

A nanocomposite structure. The synthetic nanocomposite is described as having a first component comprising a fibrous structured amorphous silica structure, and a second component comprising a precipitated calcium carbonate structure formed by pressure carbonation. The nanocomposite can be used as a filler in paints and coatings. In addition, the nanocomposite can be used in coatings used in the manufacture of paper products.

Description

[0001] Statement of Government Interest [0002] Not applicable. [0003] Copyright of drawings [0004] A portion of the disclosure of this patent document contains material that is subject to copyright protection. The patent owner has no objection to the reproduction by anyone of the patent document or the patent disclosure as it appears in the Patent and Trademark Office patent files or records, but reserves all copyright rights whatsoever. [0005] Related Patent Applications [0006] This application claims priority to U.S. Provisional Patent Application No. 61 / 816,649, filed April 26, 2013, and entitled FIBROUS STRUCTURED AMORPHOUSSILICA INCLUDING PRECIPITATED CALCIUM CARBONATE, COMPOSITIONS OF MATTER MADETHEREWITH, AND METHODS OF USE THEREOF. technical field [0007] The present application relates to novel fillers and pigments, compositions of matter including such compositions, and methods of using the compositions. Background technique [0008] Fillers and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C1/00
CPCC01P2002/72C09C1/0093C01P2006/12C01P2004/61C01P2004/45C01P2004/03C01P2004/80Y10T428/252D21H19/12D21H19/58C01P2002/77C01P2004/54C01P2006/10C01P2006/22C01P2006/62C01P2006/63C01P2006/65D21H19/40C01P2002/74C01P2004/10C01P2006/19D21H19/385
Inventor V·K·马图尔
Owner G R TECH
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