IP Library Granted Patent US 12,703,775
Granted Patent B2
US 12,703,775 · App. 18/689,642 · Granted Aug 11, 2026

Waterproof sheet, resin composition, and sealing material

Inventor: Hidekiyo Tengyu (Tokyo, JP)
Assignee: S.B.Sheet Waterproof Systems Co., Ltd.
C08J5/18C08K3/105C08K3/2279C09K3/1006C08J2327/06C08J2433/08C09K2003/1081
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Quick Facts
Patent No.
US 12,703,775
App. No.
18/689,642
Filed
Mar 6, 2024
Granted
Aug 11, 2026
Kind
B2
Art Unit
1781
USPC
428/98
Abstract

A waterproof sheet of the present invention can be applied to a waterproof sheet 30 to be included in a sheet waterproofing structure 10 that provides waterproofing to a building frame 100 . The waterproof sheet of the present invention contains a vinyl chloride-based resin and a plasticizer. The plasticizer includes a (meth)acrylic acid ester-based polymer. The acrylic acid ester-based polymer is preferably an acrylic acid ester monopolymer without functionality.

Claims (48)

1 . A waterproof sheet to be included in a sheet waterproofing structure that provides waterproofing to a building frame, the waterproof sheet comprising:

a vinyl chloride-based resin; and

a plasticizer in a liquid state,

wherein the plasticizer includes a (meth)acrylic acid ester-based polymer, and

wherein the plasticizer is included in the waterproof sheet at a content of equal to or more than 20.0 parts by weight and equal to or less than 90.0 parts by weight with respect to 100.0 parts by weight of the vinyl chloride-based resin.

2 . The waterproof sheet according to claim 1 ,

wherein the acrylic acid ester-based polymer is an acrylic acid ester monopolymer without functionality.

3 . The waterproof sheet according to claim 2 ,

wherein the acrylic acid ester monopolymer without functionality has a weight average molecular weight of equal to or more than 1,000 and equal to or less than 5,000.

4 . The waterproof sheet according to claim 2 ,

wherein the acrylic acid ester monopolymer without functionality has a glass transition point Tg of equal to or higher than −100° C. and equal to or lower than −30° C.

5 . The waterproof sheet according to claim 1 ,

wherein the plasticizer is included in the waterproof sheet at a content of equal to or more than 50.0 parts by weight and equal to or less than 75.0 parts by weight with respect to 100.0 parts by weight of the vinyl chloride-based resin.

6 . The waterproof sheet according to claim 1 , further comprising a stabilizer.

7 . The waterproof sheet according to claim 1 , further comprising a flame retardant.

8 . A waterproof sheet to be included in a sheet waterproofing structure that provides waterproofing to a building frame, the waterproof sheet comprising:

a vinyl chloride-based resin; and

a plasticizer,

wherein the plasticizer includes a (meth)acrylic acid ester-based polymer,

wherein the sheet waterproofing structure includes a first waterproof sheet covering at least a portion of a floor part of the building frame and at least a portion of a wall part erected from the floor part, and

the waterproof sheet is applied to the first waterproof sheet.

9 . A waterproof sheet to be included in a sheet waterproofing structure that provides waterproofing to a building frame, the waterproof sheet comprising:

a vinyl chloride-based resin; and

a plasticizer,

wherein the plasticizer includes a (meth)acrylic acid ester-based polymer,

wherein the sheet waterproofing structure includes a first waterproof sheet covering at least a portion of a floor part of the building frame and at least a portion of a wall part erected from the floor part, and a second waterproof sheet covering a portion of the first waterproof sheet, and

the waterproof sheet is applied to the second waterproof sheet.

10 . A resin composition used for molding the waterproof sheet according to claim 1 , the resin composition comprising:

the vinyl chloride-based resin; and

the plasticizer.

11 . A sealing material used for forming a covering layer that selectively covers a vicinity of an end part of the waterproof sheet according to claim 1 , the sealing material comprising:

the vinyl chloride-based resin;

the plasticizer; and

a solvent.

12 . A resin composition used for molding the waterproof sheet according to claim 8 , the resin composition comprising:

the vinyl chloride-based resin; and

the plasticizer.

13 . A sealing material used for forming a covering layer that selectively covers a vicinity of an end part of the waterproof sheet according to claim 8 , the sealing material comprising:

the vinyl chloride-based resin;

the plasticizer; and

a solvent.

14 . A resin composition used for molding the waterproof sheet according to claim 9 , the resin composition comprising:

the vinyl chloride-based resin; and

the plasticizer.

15 . A sealing material used for forming a covering layer that selectively covers a vicinity of an end part of the waterproof sheet according to claim 9 , the sealing material comprising:

the vinyl chloride-based resin;

the plasticizer; and

a solvent.