Sizing agent for inorganic fibers and inorganic fibers

Patent metadata

Field	Value
Publication number	US-12404628-B2
Application number	US-202218714345-A
Country	US
Kind code	B2
Filing date	Nov 29, 2022
Priority date	Dec 2, 2021
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

Disclosed is an inorganic fiber sizing agent that contains a resin, which includes a vinyl ester resin and an ionic polyester resin, and has a mass ratio of the vinyl ester resin to the ionic polyester resin of greater than 1.

First claim

The invention claimed is:

1. An inorganic fiber sizing agent comprising a resin (A), which includes a vinyl ester resin, a nonionic polyester resin and an ionic polyester resin, and has a mass ratio of the vinyl ester resin to the ionic polyester resin of greater than 1.

2. The inorganic fiber sizing agent according to claim 1 , wherein the vinyl ester resin has at least one selected from the group consisting of a bisphenol A skeleton and a bisphenol F skeleton.

3. The inorganic fiber sizing agent according to claim 1 , wherein the resin (A) further includes an epoxy resin.

4. The inorganic fiber sizing agent according to claim 3 , wherein the epoxy resin has an epoxy group that is bifunctional or higher.

5. The inorganic fiber sizing agent according to claim 3 , wherein the epoxy resin has at least one selected from the group consisting of a bisphenol A skeleton and a bisphenol F skeleton.

6. The inorganic fiber sizing agent according to claim 1 , wherein the nonionic polyester resin has at least one selected from the group consisting of a bisphenol A skeleton and a bisphenol F skeleton.

7. The inorganic fiber sizing agent according to claim 1 , wherein the nonionic polyester resin has an aliphatic unsaturated bond.

8. The inorganic fiber sizing agent according to claim 1 , wherein
the resin (A) further includes an epoxy resin, and,

if the sum of the contents of the vinyl ester resin, the ionic polyester resin, the nonionic polyester resin, and the epoxy resin is taken as 100 parts by mass, the inorganic fiber sizing agent contains the vinyl ester resin at a content of greater than or equal to 20 parts by mass and less than or equal to 70 parts by mass, the ionic polyester resin at content of greater than or equal to 2 parts by mass and less than or equal to 50 parts by mass, the nonionic polyester resin at content of greater than or equal to 5 parts by mass and less than or equal to 50 parts by mass, and the epoxy resin at content of greater than or equal to 5 parts by mass and less than or equal to 50 parts by mass.

9. The inorganic fiber sizing agent according to claim 1 , further comprising a surfactant.

10. The inorganic fiber sizing agent according to claim 9 , wherein the surfactant has an aromatic hydrocarbon group.

11. The inorganic fiber sizing agent according to claim 9 , wherein if the content of the resin (A) is taken as 100 parts by mass, the inorganic fiber sizing agent contains the surfactant at a content of greater than or equal to 10 parts by mass and less than or equal to 50 parts by mass.

12. An inorganic fiber to which the inorganic fiber sizing agent according to claim 1 is adhered.

Assignees

• Takemoto Oil & Fat Co Ltd

Inventors

• Ito Jun
• Suzuki Yohei
• Matsunaga Takuya

Classifications

• D06M2200/40

  Reduced friction resistance, lubricant properties; Sizing compositions · CPC title

• D06M2101/40

  Fibres of carbon · CPC title

• D06M15/55

  Epoxy resins · CPC title

• D06M15/263

  of unsaturated carboxylic acids; Salts or esters thereof · CPC title

• C03C25/36 Primary

  Epoxy resins · CPC title