Prepreg, method for its production, and fiber-reinforced molded product

Patent metadata

Field	Value
Publication number	US-10920030-B2
Application number	US-201815996966-A
Country	US
Kind code	B2
Filing date	Jun 4, 2018
Priority date	Jan 13, 2016
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

To provide a prepreg excellent in storage stability and capable of obtaining a fiber-reinforced molded product excellent in impact resistance, and a method for its production, as well as a fiber-reinforced molded product excellent in impact resistance. The prepreg comprises reinforcing fibers and a matrix resin, wherein the matrix resin comprises a thermoplastic resin (but excluding the following fluororesin) and a melt-formable fluororesin having a melting point of from 100 to 325° C. and having functional groups of at least one type selected from the group consisting of carbonyl group-containing groups, hydroxy groups, epoxy groups and isocyanate groups, and in 100 mass % of the total of the thermoplastic resin and the fluororesin, the proportion of the thermoplastic resin is from more than 30 to 99 mass % and the proportion of the fluororesin is from 1 to less than 70 mass %.

First claim

What is claimed is:

1. A prepreg comprising reinforcing fibers and a matrix resin, wherein the matrix resin comprises a thermoplastic resin (but excluding the following fluororesin) and a melt-moldable fluororesin having functional groups of at least one type selected from the group consisting of carbonyl group-containing groups, hydroxy groups, epoxy groups and isocyanate groups, wherein the matrix resin has a sea-island structure composed of a sea portion containing the thermoplastic resin and island portions containing the fluororesin, wherein the average diameter of the island portions is from 0.01 to 200 μm, and in 100 mass % of the total of the thermoplastic resin and the fluororesin, the proportion of the thermoplastic resin is from more than 30 to 99 mass % and the proportion of the fluororesin is from 1 to less than 70 mass %.

2. The prepreg according to claim 1 , wherein the melting point of the melt-moldable fluororesin is from 100 to 325° C.

3. The prepreg according to claim 2 , wherein the melting point of the fluororesin is from 100 to less than 260° C.

4. A fiber-reinforced molded product using the prepreg as defined in claim 2 .

5. The prepreg according to claim 1 , wherein the matrix resin has an Izod impact strength measured at −40° C. of at least 60 J/m.

6. A fiber-reinforced molded product using the prepreg as defined in claim 5 .

7. A fiber-reinforced molded product using the prepreg as defined in claim 1 .

Assignees

• Agc Inc

Inventors

• Hosoda Tomoya
• Sato Takashi
• Abe Masatoshi

Classifications

• B29C70/42 Primary

  for producing articles of definite length, i.e. discrete articles · CPC title

• C08J5/243

  using carbon fibres · CPC title

• C08L27/18 Primary

  Homopolymers or copolymers or tetrafluoroethene · CPC title

• C08L27/22

  modified by chemical after-treatment · CPC title

• C08J2327/22

  modified by chemical after-treatment · CPC title