Resin composition, secondary coating material for optical fiber, optical fiber, and method for producing optical fiber

Patent metadata

Field	Value
Publication number	US-11820704-B2
Application number	US-202017278766-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Jun 19, 2019
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

The present disclosure relates to a resin composition for coating an optical fiber, the resin composition including: a base resin that contains an oligomer, a monomer, and a photopolymerization initiator; and inorganic oxide particles, in which the inorganic oxide particles include a plurality of particle groups having different volume average particle sizes, and the volume average particle size is measured by small-angle X-ray scattering.

First claim

The invention claimed is:

1. A resin composition for coating an optical fiber, the resin composition comprising:
a base resin that contains an oligomer, a monomer, and a photopolymerization initiator; and
inorganic oxide particles,
wherein the inorganic oxide particles include a plurality of particle groups having different volume average particle sizes,
the volume average particle size is measured by small-angle X-ray scattering, and
the inorganic oxide particles are hydrophobic.

2. The resin composition according to claim 1 , wherein the inorganic oxide particles are particles containing at least one selected from the group consisting of silicon dioxide, zirconium dioxide, aluminum oxide, magnesium oxide, titanium oxide, tin oxide, and zinc oxide.

3. The resin composition according to claim 1 , wherein the inorganic oxide particles include at least two selected from the group consisting of a particle group A in which a volume average particle size is equal to or more than 5 nm and equal to or less than 35 nm, a particle group B in which a volume average particle size is more than 35 nm and equal to or less than 70 nm, and a particle group C in which a volume average particle size is more than 70 nm and equal to or less than 150 nm.

4. A secondary coating material for an optical fiber, the secondary coating material comprising the resin composition according to claim 1 .

5. An optical fiber comprising:
a glass fiber that includes a core and a clad;
a primary resin layer that is in contact with the glass fiber to coat the glass fiber; and
a secondary resin layer that coats the primary resin layer,
wherein the secondary resin layer is formed of a cured product of the resin composition according to claim 1 .

6. A method for producing an optical fiber, the method comprising:
an application step of applying the resin composition according to claim 1 onto an outer circumference of a glass fiber including a core and a clad; and
a curing step of curing the resin composition by irradiation with ultraviolet rays after the application step.

Assignees

• Sumitomo Electric Industries

Inventors

• Hamakubo Katsushi
• Tokuda Chiaki
• Iwaguchi Noriaki
• Tokuda Kazuya

Classifications

• C03C25/1065 Primary

  Multiple coatings · CPC title

• C03C25/285

  Acrylic resins · CPC title

• C03C25/326

  Polyureas; Polyurethanes · CPC title

• C03C25/47

  containing particles, fibres or flakes, e.g. in a continuous phase · CPC title

• C08G18/12

  using two or more compounds having active hydrogen in the first polymerisation step · CPC title