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US 11,760,646 B2Granted
Low-dust silica aerogel blanket and method for manufacturing same
AssigneeLG Chem, Ltd.
InventorsMyung Eun Oh, Kyu Reon Lee, Je Kyun Lee
Life of this patent
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Abstract
Provided is a silica aerogel blanket capable of preventing deterioration of heat insulating performance while reducing dust generation, and method for manufacturing the same. The method manufactures a low-dust silica aerogel blanket by separately adding a silica sol to prevent an opacifying agent from being exposed to the surface of the silica aerogel blanket.
Claims11
A method for manufacturing silica aerogel blanket, the method comprising:
- 1) Adding a base catalyst to a first silica sol, impregnating a blanket substrate with the first silica sol, and gelling the first silica sol;
- 2) adding a base catalyst to a second silica sol comprising an opacifying agent, spraying the second silica sol onto the blanket substrate impregnated with the first silica sol and gelling the second silica sol;
- and
- 3) adding a base catalyst to a third silica sol, spraying the third silica sol onto the blanket substrate impregnated with the second silica sol and gelling the third silica sol,
- wherein the first silica sol and the third silica sol do not further comprise an opacifying agent.
2 more elements
A silica aerogel blanket, comprising a first silica aerogel layer, a second silica aerogel layer, and a third silica aerogel layer,
- wherein the second silica aerogel layer is interposed between the first silica aerogel layer and the third silica aerogel layer, and
- the second silica aerogel layer further comprises an opacifying agent,
- wherein the first silica aerogel layer and the third silica aerogel layer do not further comprise an opacifying agent.
Dependencies are inferred from the claim text.