Oil leakage repairing material, oil leakage repairing method, and pipe

Patent metadata

Field	Value
Publication number	US-11976769-B2
Application number	US-201916628774-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	May 22, 2018
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

Provided is an oil leakage repairing material, wherein the oil leakage repairing material is a curable composition, oil absorption of the oil leakage repairing material before curing is 100% or greater, and oil absorption of the oil leakage repairing material after curing is 50% or less.

First claim

The invention claimed is:

1. An oil leakage repairing material comprising:
an elastomer, monofunctional (meth)acrylate free from a hydroxyl group, polyfunctional (meth)acrylate, and a photo-radical initiator;
wherein the oil leakage repairing material is a putty;
wherein the elastomer includes styrene as a constitutional component;
wherein an amount of the elastomer in the total amount of the oil leakage repairing material is greater than 15% by mass but 35% by mass or less;
wherein an amount of the monofunctional (meth)acrylate free from a hydroxyl group in the total amount of the oil leakage repairing material is greater than 60% by mass but 80% by mass or less;
wherein the oil leakage repairing material is an active energy ray-curable composition;
oil absorption of the oil leakage repairing material before curing is 100% by weight or greater; and
oil absorption of the oil leakage repairing material after curing is 50% by weight or less.

2. The oil leakage repairing material according to claim 1 ,
wherein an amount of the polyfunctional (meth)acrylate in the total amount of the oil leakage repairing material is greater than 0.1% by mass but 15% by mass or less.

3. The oil leakage repairing material according to claim 2 ,
wherein the amount of the polyfunctional (meth)acrylate in the total amount of the oil leakage repairing material is greater than 0.2% by mass but 10% by mass or less.

4. The oil leakage repairing material according to claim 1 ,
wherein a glass transition temperature of the oil leakage repairing material after curing is 150° C. or lower.

5. An oil leakage repairing method, comprising:
applying the oil leakage repairing material according to claim 1 , which is an active energy ray-curable composition, to an area of a pipe from which oil is leaked, and applying active energy rays to the oil leakage repairing material to cure the oil leakage repairing material.

Assignees

• Dexerials Corp

Inventors

• Mori Yasutaka
• Nishio Takeshi
• Kubota Takaaki
• Abe Tetsuya

Classifications

• F16L55/175 Primary

  by using materials which fill a space around the pipe before hardening · CPC title

• C08F220/18

  with acrylic or methacrylic acids · CPC title

• C08F220/28

  containing no aromatic rings in the alcohol moiety · CPC title

• C08F236/02

  the radical having only two carbon-to-carbon double bonds · CPC title

• C08L25/08

  Copolymers of styrene (C08L29/08, C08L35/06, C08L55/02 take precedence) · CPC title