Fiber bundling agent, fiber material, forming material, and formed product

Patent metadata

Field	Value
Publication number	US-12404377-B2
Application number	US-202118012642-A
Country	US
Kind code	B2
Filing date	Jun 3, 2021
Priority date	Jun 23, 2020
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

To provide a fiber bundling agent containing: a vinyl ester resin (A) having an alkoxy polyoxyalkylene structure, a urethane bond, a (meth)acryloyl group, and an epoxy group; and an aqueous medium, in which the vinyl ester resin (A) has an epoxy equivalent of 3,500 g/eq to 11,000 g/eq. Since the fiber bundling agent is excellent in bundling properties and in interfacial shear strength between fiber resins, the fiber bundling agent is suitably used for production of a fiber material capable of imparting excellent strength to a molded product.

First claim

The invention claimed is:

1. A fiber bundling agent comprising:
a vinyl ester resin (A) having an alkoxy polyoxyalkylene structure, a urethane bond, a (meth)acryloyl group, and an epoxy group; and
an aqueous medium, wherein
the vinyl ester resin (A) has an epoxy equivalent of 3,500 g/eq to 11,000 g/eq.

2. The fiber bundling agent according to claim 1 , wherein the vinyl ester resin (A) has a structure derived from a bisphenol A epoxy resin.

3. The fiber bundling agent according to claim 1 , further comprising:
an epoxy resin (B).

4. The fiber bundling agent according to claim 1 , further comprising:
a vinyl ester resin (C) other than the vinyl ester resin (A).

5. A fiber material comprising:
the fiber bundling agent according to claim 1 .

6. A molding material comprising:
the fiber material according to claim 5 ; and;
a thermosetting resin.

7. A molded product, which is a cured product of the molding material according to claim 6 .

Assignees

• Dainippon Ink & Chemicals

Inventors

• LI Fuchih
• Nagao Kenji

Classifications

• D06M15/564

  Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them · CPC title

• D06M15/55

  Epoxy resins · CPC title

• D06M15/273

  of unsaturated carboxylic esters having epoxy groups · CPC title

• D06M15/27

  of alkylpolyalkylene glycol esters of unsaturated carboxylic acids · CPC title

• C08J2363/02

  Polyglycidyl ethers of bis-phenols · CPC title