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US 9,321,685 B2Granted
Gypsum composition, gypsum slurry, gypsum hardened body, gypsum-based building material, gypsum board, and manufacturing method for a gypsum-based building material
AssigneeYoshino Gypsum Co., Ltd.
InventorsYuji Ataka, Yosuke Sato
Life of this patent
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Abstract
A gypsum composition includes a calcined gypsum and a starch urea phosphate.
Claims13
A gypsum composition including a calcined gypsum and a starch urea phosphate, wherein the starch urea phosphate is included at a proportion greater than or equal to 0.2 parts by mass and less than or equal to 10 parts by mass relative to 100 parts by mass of the calcined gypsum.
A gypsum hardened body comprising:
- a gypsum composition including a calcined gypsum and a starch urea phosphate,
- wherein the gypsum composition is mixed with an air entraining agent and water and subsequently hardened.
A gypsum hardened body comprising:
- a gypsum composition including a calcined gypsum and a starch urea phosphate,
- wherein the gypsum composition is mixed with water and subsequently hardened, and
- wherein a specific gravity thereof is greater than or equal to 0.4 and less than or equal to 0.65.
A gypsum-based building material comprising:
- a gypsum composition including a calcined gypsum and a starch urea phosphate,
- wherein the gypsum composition is mixed with water and subsequently hardened to form a gypsum hardened body, and
- wherein the gypsum hardened body is a core material thereof.
A gypsum board comprising:
- a gypsum composition including a calcined gypsum and a starch urea phosphate,
- wherein the gypsum composition is mixed with water and subsequently hardened to form a gypsum hardened body, and
- wherein the gypsum hardened body is a core material thereof.
A manufacturing method for a gypsum-based building material, including:
- a step of mixing the gypsum composition including a calcined gypsum and a starch urea phosphate with water to prepare a gypsum slurry;
- a step of adding a bubble to the gypsum slurry;
- a step of depositing the gypsum slurry between surface materials;
- and
- a step of hardening the gypsum slurry to provide a gypsum hardened body as a core material.
2 more elements
Dependencies are inferred from the claim text.