阅读说明：本技术 液态热固化性树脂组合物、树脂固化物的制造方法、定子线圈及旋转电机 (Liquid thermosetting resin composition, method for producing cured resin, stator coil, and rotating electrical machine ) 是由 佐藤悟 马渊贵裕 于 2018-03-14 设计创作，主要内容包括：液态热固化性树脂组合物,该液态热固化性树脂组合物含有：热固化性树脂(1)、纳米碳(2)、在分子末端具有与上述热固化性树脂和上述纳米碳反应的官能团的有机系添加剂(5)、聚合性不饱和单体、和聚合性不饱和单体的聚合引发剂,其特征在于,相对于上述液态热固化性树脂组合物,含有0.1质量％以上且10质量％以下的上述纳米碳(2)。(A liquid thermosetting resin composition, comprising: specifically disclosed is a liquid thermosetting resin composition containing a thermosetting resin (1), nanocarbons (2), an organic additive (5) having a functional group that reacts with the thermosetting resin and the nanocarbons at the molecular end, a polymerizable unsaturated monomer, and a polymerization initiator for the polymerizable unsaturated monomer, which is characterized by containing the nanocarbons (2) in an amount of 0.1 to 10 mass% relative to the liquid thermosetting resin composition.)

1. A liquid thermosetting resin composition, characterized by comprising: a thermosetting resin; nano carbon; an organic additive having a functional group reactive with the thermosetting resin and the nanocarbon at a molecular end; a polymerizable unsaturated monomer; and a polymerization initiator for a polymerizable unsaturated monomer, wherein the nanocarbon is contained in an amount of 0.1 to 10 mass% based on the liquid thermosetting resin composition.

2. The liquid heat-curable resin composition according to claim 1, wherein the nanocarbon is at least one selected from the group consisting of fullerene and carbon nanotube.

3. The liquid thermosetting resin composition according to claim 1, wherein the nanocarbon is phenyl fullerene methyl butyrate.

4. The liquid thermosetting resin composition according to any one of claims 1 to 3, wherein the organic additive has an-N-structure in a molecule, and generates nitrogen gas and carbon radicals by thermal decomposition at 50 ℃ or higher and 100 ℃ or lower, and performs a radical reaction with the nanocarbon.

5. The liquid thermosetting resin composition according to any one of claims 1 to 4, wherein the functional group present at the molecular end of the organic additive is at least one selected from a carboxylic acid group, a hydroxyl group and an amino group.

6. The liquid thermosetting resin composition according to any one of claims 1 to 5, wherein the polymerizable unsaturated monomer is at least one selected from styrene and 2-hydroxyethyl (meth) acrylate.

7. The liquid heat-curable resin composition according to any one of claims 1 to 6, wherein the polymerization initiator of the polymerizable unsaturated monomer has a 10-hour half-life temperature of 100 ℃ or higher.

8. A method for producing a cured resin, comprising: a step of forming a nanocarbon derivative by heating the liquid thermosetting resin composition according to any one of claims 1 to 7 to react the nanocarbon with the organic additive; and a step of further heating a resin composition containing the nanocarbon derivative to react the thermosetting resin with the nanocarbon derivative and to react the nanocarbon derivative with the polymerizable unsaturated monomer.

9. A stator coil comprising a coil conductor and an insulating layer provided around the coil conductor, characterized in that,

the insulating layer comprises a cured product of the liquid heat-curable resin composition according to any one of claims 1 to 7.

10. A rotating electric machine characterized in that a stator coil according to claim 9 is accommodated in a slot of a stator core.

Technical Field

The present invention relates to a liquid thermosetting resin composition used for insulation of electrical equipment, and more particularly to a liquid thermosetting resin composition used for coil impregnation and casting of a stator coil.

Background

In recent years, with the miniaturization of electrical equipment, studies for making resin materials highly heat-resistant have been intensively made. As one of measures for improving the heat resistance of the resin material, the addition of nanocarbons, particularly fullerenes, is effective. Consider that: since fullerene has a high radical trapping property, it has an effect of suppressing decomposition of the resin. For example, patent document 1 discloses a fullerene-unsaturated compound conjugate composed of a fullerene and an unsaturated compound such as styrene or methacrylic acid chemically bonded to the fullerene. Further, patent document 2 discloses a radiation-sensitive resin composition containing a copolymer having a carboxyl group and/or a carboxylic anhydride group and an epoxy group, a polymerizable compound having an ethylenically unsaturated bond, a radiation-sensitive polymerization initiator, and a fullerene derivative. Further, non-patent document 1 reports that thermal decomposition of a polymethyl methacrylate (PMMA) film can be suppressed by addition of fullerene.

Disclosure of Invention

Problems to be solved by the invention

In recent years, electric devices are required to have not only a small size but also a high output. In order to achieve this, the insulating material needs to have high heat resistance and high strength. However, in the structures of patent document 1 and non-patent document 1, although the heat resistance can be improved, the adhesiveness at the interface between the resin and the fullerene is insufficient, and thus high strength cannot be achieved. On the other hand, in patent document 2, although the strength can be increased by using a fullerene derivative, a plurality of steps are required for synthesizing the fullerene derivative, and it is required to reduce the number of steps for producing a cured resin material to achieve efficiency.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a liquid thermosetting resin composition capable of efficiently producing a resin cured product having high heat resistance and high strength.

Means for solving the problems

The present invention is a liquid thermosetting resin composition, characterized in that the liquid thermosetting resin composition contains: the thermosetting resin composition contains 0.1 to 10 mass% of nanocarbon based on the liquid thermosetting resin composition, nanocarbon, an organic additive having a functional group reactive with the thermosetting resin and the nanocarbon at a molecular end, a polymerizable unsaturated monomer, and a polymerization initiator for the polymerizable unsaturated monomer.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention can provide a liquid thermosetting resin composition which can efficiently produce a resin cured product having high heat resistance and high strength.

Drawings

Fig. 1 is a schematic view showing the state of components of a liquid thermosetting resin composition according to embodiment 1.

Fig. 2 is a cross-sectional view of a stator coil according to embodiment 2.

Fig. 3 is a view schematically showing a main part of a stator of a rotating electric machine according to embodiment 3, and is a view (cross-sectional view) showing a section along a rotating shaft.

Fig. 4 is a diagram schematically showing a main part of a stator of a rotating electric machine according to embodiment 3, and is a diagram (vertical sectional view) of a cross section orthogonal to a rotation axis as viewed from the arrow a direction in fig. 3.

FIG. 5 is a flowchart showing the production of a cured resin from the liquid thermosetting resin composition of the example.

Fig. 6 is a graph showing the relationship between the amount of nanocarbon added and the 10 mass% reduction temperature.

Detailed Description