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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11884550 B1

PDFFull Text
Date of Patent:
Jan. 30, 2024

Filed:

Aug. 16, 2017

Shaped gel articles and sintered articles prepared therefrom

Applicant:

3m Innovative Properties Company, St. Paul, MN (US);

Inventors:

Kathleen M. Humpal, Stillwater, MN (US);

Melissa A. Lackey, Woodbury, MN (US);

Brant U. Kolb, Afton, MN (US);

Paul D. Pennington, Farmington, MN (US);

Mark J. Hendrickson, Minneapolis, MN (US);

Assignee:

3M Innovative Properties Company, St. Paul, MN (US);

Attorney:
Primary Examiner:

Deve V Hall

Int. Cl.
CPC ...
C01B 33/158 (2006.01); C08F 220/28 (2006.01); C08K 3/36 (2006.01); C08K 9/06 (2006.01); B29C 39/00 (2006.01); B29C 39/02 (2006.01); C04B 35/626 (2006.01); C04B 35/624 (2006.01); C04B 35/14 (2006.01); C04B 38/00 (2006.01); C08J 9/28 (2006.01); B29K 33/00 (2006.01); B29K 105/00 (2006.01); B29K 509/00 (2006.01); B29L 28/00 (2006.01);
U.S. Cl.
CPC ...
C01B 33/1585 (2013.01); B29C 39/006 (2013.01); B29C 39/02 (2013.01); C01B 33/158 (2013.01); C04B 35/14 (2013.01); C04B 35/624 (2013.01); C04B 35/6265 (2013.01); C04B 35/62655 (2013.01); C04B 38/0045 (2013.01); C08J 9/286 (2013.01); C08K 3/36 (2013.01); C08K 9/06 (2013.01); B29K 2033/08 (2013.01); B29K 2105/0061 (2013.01); B29K 2509/00 (2013.01); B29K 2995/0027 (2013.01); B29L 2028/00 (2013.01); C04B 2235/9653 (2013.01); C08F 220/285 (2020.02); C08F 2800/20 (2013.01); C08J 2201/042 (2013.01); C08J 2205/026 (2013.01); C08J 2333/14 (2013.01); C08K 2201/011 (2013.01);
Abstract

Shaped gel articles that are formed within a mold cavity and that retain the size and shape of the mold cavity upon removal from the mold cavity, sintered articles prepared from the shaped gel articles, and methods of making the sintered articles are provided. The shaped gel articles are formed from a casting sol that contains colloidal silica particles that are treated with a surface modification composition that includes a silane surface modification agent having a radically polymerizable group. The sintered article has a shape identical to the mold cavity (except in regions where the mold cavity was overfilled) and to the shaped gel article but reduced in size proportional to the amount of isotropic shrinkage.

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