Polytetrafluoroethylene oil-based solvent type dispersion, epoxy resin composition containing polytetrafluoroethylene and cured material thereof

A polytetrafluoroethylene and oil-based solvent technology, which is applied in the field of oil-based solvent-based dispersions and can solve problems such as complex preparation methods

Active Publication Date: 2016-08-10
MITSUBISHI PENCIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the production method described in the same document can be obtained by mixing a modified PTFE (emulsion) polymer having persistent perfluoro (peroxide) radicals and at least one type of olefinic unsaturated oil , and then apply mechanical stress to the modified PTFE (emulsion) polymer, the preparation method is complex

Method used

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  • Polytetrafluoroethylene oil-based solvent type dispersion, epoxy resin composition containing polytetrafluoroethylene and cured material thereof
  • Polytetrafluoroethylene oil-based solvent type dispersion, epoxy resin composition containing polytetrafluoroethylene and cured material thereof
  • Polytetrafluoroethylene oil-based solvent type dispersion, epoxy resin composition containing polytetrafluoroethylene and cured material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 1～3

[0091][Examples 1-5 and Comparative Examples 1-3: Preparation of PTFE-containing epoxy resin composition and its cured product]

[0092] Using the obtained dispersions 1 to 5, a cured product was produced using a PTFE-containing epoxy resin composition with the compounding formulation shown in Table 2 below.

[0093] After sufficiently mixing at the compounding ratios shown in Examples 1 to 5 and Comparative Examples 1 to 3, the solvent was removed under reduced pressure at 50°C, and the pressure was further increased to 100°C. Thereafter, the reduced pressure was released, the temperature was raised to 180°C, and a cured product was obtained.

[0094] For each cured product obtained, the relative permittivity and dielectric loss tangent at 23° C. and 1 GHz were measured for motor characteristics (relative permittivity, dielectric loss tangent) using Material-analyzer 4291B (manufactured by Agilent Technologies, Inc.).

[0095] These results are shown in Table 2 below.

[00...

Embodiment 11～17 and comparative example 11

[0101] According to the compounding formulation shown in the following Table 3, eight types of PTFE (A to H) of each specific surface area, oligomers containing fluorine-containing groups and lipophilic groups were used as fluorine-based additives, and methyl ethyl ketone was used as an oily solvent. To prepare oily solvent dispersions of PTFE. In addition, G and H of the PTFE powder are the same, but G uses the PTFE powder which heated the PTFE powder at the temperature of 270 degreeC, changed the surface state, and adjusted the specific surface area.

[0102] In addition, in the above-mentioned preparation, the fluorine-based additive is sufficiently stirred and mixed in an oily solvent, and then PTFE is added and further stirred and mixed.

[0103] Using a horizontal bead mill, the PTFE mixture obtained above was dispersed with 0.3 mm diameter zirconia beads to obtain oily solvent dispersions of PTFE in Examples 11 to 17 and Comparative Example 11. In addition, the water c...

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Abstract

The invention relates to a polytetrafluoroethylene oil-based solvent type dispersion, an epoxy resin composition containing polytetrafluoroethylene and a cured material thereof. In the invention, the polytetrafluoroethylene oil-based solvent type dispersion is used to provide a PTFE oil-based solvent type dispersion having a micro particle size, low viscosity and excellent stability in storage. The polytetrafluoroethylene oil-based solvent type dispersion is characterized by comprising polytetrafluoroethylene having the specific surface area of less than 15m<2>/g and a fluorine type additive being 0.1-50wt% relative to the quality of the polytetrafluoroethylene and at least containing a fluorine-contained group and a lipophilic group. The epoxy resin composition containing the polytetrafluoroethylene oil-based solvent type dispersion having excellent dispersity is used to provide an epoxy resin composition containing the polytetrafluoroethylene and being suitable for an electronic substrate material, an insulation material, a bonding material and the like having a low relative dielectric constant and a low dielectric loss angle tangent, and a cured material thereof.

Description

technical field [0001] The present invention relates to an oily solvent-based dispersion of polytetrafluoroethylene (hereinafter, polytetrafluoroethylene may be simply referred to as "PTFE"), and also to a PTFE-containing epoxy resin composition and a cured product thereof. More specifically, it relates to an oily solvent-based dispersion of PTFE with a fine particle size and excellent dispersibility, and a low relative permittivity and low dielectric loss tangent material suitable for electronic substrate materials, insulating materials, adhesive materials, etc. The PTFE-containing epoxy resin composition and its cured product. Background technique [0002] PTFE is a material with excellent heat resistance, electrical insulation, low dielectric properties, low friction properties, non-adhesive properties, and weather resistance, and can be used in electronic equipment, sliding materials, automobiles, kitchen supplies, etc. PTFE having such characteristics is added in the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/11C08L27/18C08L63/02C08L63/00
CPCC08J3/11C08L27/18C08L63/00C08J2327/18C08L2205/03
Inventor 佐藤厚志阿部宽史
Owner MITSUBISHI PENCIL CO LTD
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