Method for producing silica sol
US-10604411-B2 · Mar 31, 2020 · US
Method for producing silica sol
US11001501B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11001501-B2 |
| Application number | US-202016789137-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 12, 2020 |
| Priority date | Jul 31, 2015 |
| Publication date | May 11, 2021 |
| Grant date | May 11, 2021 |
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Abstract
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[Solution] A method for producing a silica sol is a method including a step of mixing liquid (A) containing an alkaline catalyst, water, and a first organic solvent with liquid (B) containing an alkoxysilane or its condensate and a second organic solvent, and liquid (C1) having a pH of 5.0 or higher and lower than 8.0 and containing water or liquid (C2) containing water and being free of an alkaline catalyst to make a reaction liquid.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a silica sol, comprising a step of mixing liquid (A) containing an alkaline catalyst, water and a first organic solvent with liquid (B) containing an alkoxysilane or its condensate and a second organic solvent, and liquid (C) containing water to make a reaction liquid, provided that the liquid (B) contains the alkoxysilane, a molar ratio of the alkoxysilane and the water in the reaction liquid is (alkoxysilane):(water)=(1.0):(2.0 to 12.0), and provided that the liquid (B) contains the condensate of the alkoxysilane, a molar ratio of the condensate of the alkoxysilane and the water in the reaction liquid is, when the condensate is N-mer of the alkoxysilane (N represents an integer of 2 or more), (condensate of alkoxysilane):(water)=(1.0):(2.0×N to 12.0×N). 2. The method for producing a silica sol according to claim 1 , wherein temperatures of the liquid (A), the liquid (B), and the liquid (C) are each independently 0 to 70° C. 3. The method for producing a silica sol according to claim 1 , wherein the alkoxysilane is tetramethoxysilane. 4. The method for producing a silica sol according to claim 1 , wherein the alkaline catalyst is at least one of ammonia and an ammonium salt. 5. The method for producing a silica sol according to claim 4 , wherein the alkaline catalyst is ammonia. 6. The method for producing a silica sol according to claim 1 , wherein the first and second organic solvents are methanol.
Assignees
Inventors
Classifications
- C01B33/145Primary
Preparation of hydroorganosols, organosols or dispersions in an organic medium · CPC title
containing a liquid organic phase · CPC title
Polysiloxanes · CPC title
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- What does patent US11001501B2 cover?
- [Solution] A method for producing a silica sol is a method including a step of mixing liquid (A) containing an alkaline catalyst, water, and a first organic solvent with liquid (B) containing an alkoxysilane or its condensate and a second organic solvent, and liquid (C1) having a pH of 5.0 or higher and lower than 8.0 and containing water or liquid (C2) containing water and being free of an alk…
- Who is the assignee on this patent?
- Fujimi Inc
- What technology area does this patent fall under?
- Primary CPC classification C01B33/145. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 11 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).