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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 12600670 B1

PDFFull Text
Date of Patent:
Apr. 14, 2026

Filed:

Mar. 17, 2021

Precast concrete molded body

Applicant:

Dow Toray Co., Ltd., Tokyo, JP;

Inventors:

Taro Minato, Tokyo, JP;

Katsuhiko Taniguchi, Tokyo, JP;

Sakae Ushijima, Tokyo, JP;

Hideo Matsuzaki, Kagoshima, JP;

Masatomo Makiguchi, Kagoshima, JP;

Motoaki Imura, Kagoshima, JP;

Hideyuki Mori, Ichihara, JP;

Assignee:

DOW TORAY CO., LTD., Shinagawa-ku, JP;

Attorney:

Warner Norcross + Judd LLP

Primary Examiner:

Deve V Hall

Int. Cl.
CPC ...
C04B 24/42 (2006.01); C04B 20/00 (2006.01); C04B 28/04 (2006.01); C04B 40/00 (2006.01); C04B 103/00 (2006.01); C04B 103/65 (2006.01); C04B 111/00 (2006.01); C04B 111/20 (2006.01); C04B 111/27 (2006.01); E01C 5/06 (2006.01); E02B 3/04 (2006.01); E02D 29/02 (2006.01);
U.S. Cl.
CPC ...
C04B 24/42 (2013.01); C04B 20/0036 (2013.01); C04B 28/04 (2013.01); C04B 40/0032 (2013.01); C04B 2103/0058 (2013.01); C04B 2103/65 (2013.01); C04B 2111/0075 (2013.01); C04B 2111/27 (2013.01); C04B 2111/29 (2013.01); C04B 2201/50 (2013.01); E01C 5/065 (2013.01); E02B 3/04 (2013.01); E02D 29/0266 (2013.01); E02D 2300/002 (2013.01);
Abstract

A precast concrete molded body is provided, which is a cured product of a concrete composition. The concrete composition comprises: a microcapsule; cement; and at least one type of aggregate. The microcapsule is provided with a core-shell structure having i) a core made of a water repellent organosilicon material selected from the group consisting of organosilanes, organosilane partial condensation products, and branched siloxane resins, and ii) a shell made of a silicon-based network polymer containing silica units. The concrete composition contains 0.01 to less than 0.5 parts by weight of microcapsules per 100 parts by weight of cement. Thereby, a precast concrete molded body can be provided, having high strength, as well as at least one of the following properties: air content stability, substance penetration prevention, and freeze-thaw resistance.

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