KR20100099681A - Electrical insulation system - Google Patents

Abstract

The present invention relates to an electrical insulation system which is a reinforced fiber composite system suitable for use in gas-insulated switchgear applications, wherein the electrical insulation system comprises a solidified polymer composition and a reinforcing fiber, the fiber comprising polyethylene naphthalate fiber, poly Butylene naphthalate fibers, fibers that are copolyesters of arsenic A and / or bisophenol F with naphthalene dicarbonic acid, fibers that are copolyesters of hydroxy-benzoic acid and hydroxy-naphthoic acid, or Mixtures of these fibers, and in particular the use of composite systems in the production of gas-insulated switchgear applications.

Description

Electrical insulation system {ELECTRICAL INSULATION SYSTEM}

The present invention is a reinforcing fiber composite system suitable for use in gas-insulated switchgear applications, preferably in gas-insulated metal-receiving switchgear applications, phosphorus electrical insulation systems having improved mechanical properties and A method of producing the electrical insulation system.

Cylindrical insulation parts in gas-insulated switchgear, such as chamber insulators and operative rods, are commonly made of reinforcing fiber material. The material used is preferably a cured epoxy resin system reinforced with polyethylene terephthalate (PET) fibers or aramid (Kevlar®, Twaron®) fibers or combinations thereof. These fibers have strict limits. Polyethylene terephthalate fibers, for example, have relatively weak mechanical properties. Aramid fibers have a high moisture uptake as well as low adhesion between the fibers and the epoxy matrix. Therefore, there is a need for an electrical insulation system with improved properties, especially for use as an electrical insulator to be used in gas-insulated electrical applications, for example in pressurized gas-insulated switchgear stations (GIS).

Now, thermoplastic or duroplastc polymer compositions, preferably fluoroplastic polymer compositions, preferably cured epoxy resin compositions, polyethylene naphthalate (PEN) fibers, polybutylene naphthalate (PBN) fibers, naphthalene dicarbo Copolyesters of hydroxy-benzoic acid and hydroxy-naphthoic acid which are copolyesters of bisphenol A and / or bisphenol F with nickic acid, preferably p-hydrobenzoic acid and 6-hydroxy- Reinforcing fiber composite systems comprising reinforcing fibers selected from copolyesters of 2-naphthoic acid or mixtures of these fibers yield an electrical insulation system with improved mechanical properties, which is particularly desirable for electric gas-insulated switchgear applications, preferably For the creation of gas-insulated metal-receiving electrical applications such as gas-insulated switchgear stations (GIS) It is useful as an electrical insulator.

The invention is defined in the claims. The present invention relates to an electrical insulation system, wherein the electrical insulation system is suitable for use in electrical gas-insulated switchgear applications, preferably in gas-insulated metal receiving switchgear applications, the electrical insulation system comprising a solidified polymer composition, Preferably a cured epoxy resin composition, and reinforcing fibers, the reinforcing fibers comprising polyethylene naphthalate (PEN) fibers, polybutylene naphthalate (PBN) fibers, arsenic phenol A and / or arsenic with naphthalene dicarbonic acid Copolyester of fennel F, copolyester of hydroxy-benzoic acid and hydroxy-naphthoic acid, preferably copoly of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid From fibers that are esters or from mixtures of these fibers, wherein the reinforcing fiber composite system may optionally contain additional additives It is characterized by.

The invention further creates the electrical insulation system suitable for use in the electrical gas-insulated switchgear application, preferably for gas-insulated, metal-wound electrical applications such as pressurized gas-insulated switchgear stations (GIS). It is about a method. The invention further relates to the electrical gas-insulated switchgear application, preferably to the gas-insulated and metal-wraped electrical application, such as a pressurized gas-insulated switchgear station (GIS) or spacer insulator, and to the related applications in the production of such electrical. It relates to the use of the insulation system. The invention further relates to said electric gas-insulated switchgear application, preferably to a gas-insulated metal receiving electrical application comprising the electrical insulation system according to the invention.

Polyethylene naphthalate (PEN) is an ester of ethylene glycol with naphthalene dicarbonic acid and comprises substantially the following formula:

Polybutylene naphthalate (PBN) is an ester of butylene glycol with naphthalene dicarbonic acid and comprises substantially the following formula:

Copolyesters of bisophenol A and / or bisophenol F with naphthalene dicarbonic acid substantially comprise the following formula:

Where G is methyl when made of bisphenol A and G is hydrogen when made of bisophenol F.

Copolyesters of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid substantially comprise the following formula:

The fibers to be used in the present invention preferably have fiber diameters used for roving cloths and fabrics made of the fibers. Generally the diameter is in the range of about 0.4-200 microns (μm), preferably in the range of about 1-100 microns, preferably in the range of about 5-50 microns. Diameter is generally not important. It is known to those skilled in the art to optimize the diameter if necessary.

The reinforcing fibers may preferably be in the form of chopped fibers having an average length in the range of 0.5 mm to 15 mm, preferably in the range of 1.0 mm to 8 mm. The use according to the invention, however, is that the fibers are preferably used in chopped form, i.e. as dry continuous non-woven filament, or as fiber spun yarn or woven fibers and skins. Dry-body is preferably produced by dry winding of the fiber spun yarn or by dry winding of the fabric. The one or more rovings or drips may also be placed in the cured resin system in any order, in parallel and / or rectangular order, preferably by dry winding of the rovings or drips (eg around the mandrel). have. The system may also include a combination of chopped fibers and / or continuous fibers and / or one or more fiber rovings or landings.

The reinforcing fibers defined above and selected from the fibers to be used according to the invention are preferably in an amount from 20 to 70 w%, preferably in 30 to 60 w%, preferably in 35 to 55 w% of the total weight of the reinforcing fiber composite system. Exists as.

The polymer used in the present invention is preferably selected from the group comprising epoxy resin systems, polyurethanes, polyesters, polyaramids, polybutylene terephthalates and polydicyclopentadienes. The polymer is preferably a durro-plastic polymer selected from epoxy resin systems and polyurethanes, most preferably cured epoxy resin systems.

As an optional additive, the reinforcing fiber composite system can include components selected from filler materials, wet / dispersants, plasticizers, antioxidants, light absorbers, silicones, and additional additives commonly used in electrical applications. . The reinforcing fibers, fillers and optional additional additives may be up to 80 w%, preferably up to 70 w% of the total weight of the reinforcing fiber composite system.

The reinforcing fiber composite system of the present invention may optionally contain micro- or nano-sized grain size distribution of mineral filler materials, or mixtures of such filler materials. However, the mineral fillers preferably have an average grain size distribution in the range of 1 to 500 μm, preferably 5 to 100 μm. Preferably at least 70% of the particles, preferably at least 80% of the particles, preferably at least 90% of the particles have a particle size within the indicated ranges.

Mineral fillers are preferably selected from conventional filler materials generally used as fillers in electric gas-insulated switchgear applications. Such filler materials are, for example, stable and inherently known relative to degradation products of sulfur hexafluoride (SF ₆ ) such as aluminum oxide. Preferably, the electrical insulation system according to the invention contains no filling material.

Epoxy resin systems, polyesters, polyamides, polybutylene terephthalates, polyurethanes, and polydicyclopentadienes are described in the literature. When a special reinforcing fiber composite system according to the invention is made, the fiber component (s) together with the optional additives are generally incorporated into the starting material of each monomer of the polymer in a similar manner as described in the literature for filler materials and other additives. Can be.

Subsequently, the starting material is cured. This is within the knowledge of those skilled in the art.

When chopped reinforcing fibers as defined herein above are used, the reinforcing fiber materials are incorporated into the starting materials of the monomers of each polymer by known methods to be uniformly dispersed. The non-cured composition thus obtained, for example a non-cured epoxy resin composition, can be processed using, for example, conventional vacuum casting and / or automated pressure gelation (APG) manufacturing processes. The dispersion is optionally formed into the desired shape using a method known with the aid of a molding tool, and then optionally cured using post-curing.

In this respect, the invention also relates to a method for producing an electrical insulation system, which method is suitable for use in electrical gas-insulated switchgear applications, preferably in gas-insulated, metal-wrapped electrical applications. Phthalate (PEN) fibers, polybutylene naphthalate (PBN) fibers, fibers that are copolyesters of bisphenol A and / or bisphenol F with naphthalene dicarbonic acid, hydroxy-benzoic acid and hydroxy-naphthoic acid From copolyesters, preferably copolyesters of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoyl acid, or mixtures of these fibers, and optionally further additives as defined above herein. The selected chopped reinforcing fibers are incorporated into the starting material of the monomer of each polymer as defined herein above, preferably the epoxy resin composition. It is characterized in that it is uniformly dispersed, and then the dispersion is optionally formed into the desired shape by the molding tool, which is then cured and optionally post-cured.

The reinforcing fiber composite system according to the invention suitable for use as an electrical insulation system preferably contains reinforcing fibers in the form of continuous nonwoven yarns or as fiber spun yarn or woven or non-crimp fabrics. Dry-bodies are preferably produced by dry winding of fiber spun yarn or by dry winding of woven fabrics or by dry winding of non-crimp fabrics. At least one of such fiber spun yarns or fabrics is also cured in any desired order, preferably in a parallel and / or rectangular order, preferably by dry winding of the spun yarns or fabrics (eg around the mandrel). It can be placed in the resin system. The system may also include chopped fibers and / or continuous fibers and / or a combination of one or more fiber spun yarns or fabrics.

The invention therefore also relates to a process for producing an electrical insulation system suitable for use in electrical gas-insulated switchgear applications, preferably gas-insulated metal-receiving electrical applications, the process comprising (i) at least one of a reinforcing material Providing a mold for an article comprising a dry layer of the reinforcement material, wherein the reinforcing material is a continuous nonwoven yarn and / or at least one fibrous spun yarn and / or at least one woven fabric and / or within a mold as defined herein above. Or providing a mold comprising at least one non-crimp fabric; (Ii) casting an uncured monomer composition, preferably a single amount epoxy resin mixture, into the mold, such that the mold is filled and at least one layer of reinforcing material is completely injected; (Iii) curing the monomer composition in the mold at a suitable temperature for a time long enough to cure; (Iv) optionally post-curing the obtained reinforced fiber composite system.

The aforementioned at least one dry layer of dry reinforcing material comprising a continuous nonwoven yarn and / or at least one fiber spun yarn and / or at least one woven fabric and / or at least one non-crimp fabric is also referred to as a "dry body. It is called. To produce a dry body, the fibers, rovings or fabrics mentioned are wound around a cylinder (called a mandrel axis). Polyester fleece layers can be used to stabilize the dry body. As a result, the mandrel shaft is put in another cylinder (outer mold), after which the fibers are injected.

Preferred thermosetting resins used within the context of the present invention are epoxy resins made from aromatic and / or cycloaliphatic compounds. These compounds are known in nature. Epoxy resins are reactive glycidyl compounds containing at least two 1,2-epoxy groups per molecule. Preferably, mixtures of poly-glycidyl compounds are used, such as mixtures of diglycidyl- and triglycidyl compounds.

Epoxy compounds useful in the present invention include glycidyl groups substituted with unsubstituted glycidyl groups and / or methyl groups. These glycidyl compounds preferably have a molecular weight of 200 to 1200, in particular 200 to 1000, and may be solid or liquid. The epoxy value (equivalent amount / 100 g) is preferably at least 3, preferably at least 4, and especially about 5, preferably about 4.9 to 5.1 or more. Preference is given to glycidyl compounds having glycidyl ether- and / or glycidyl ester groups. Such compounds may also contain both kinds of glycidyl groups, for example 4-glycidyloxy-benzoic acid-glycidyl ester. Preference is given to polyglycidyl esters having 1 to 4 glycidyl ester groups, in particular diglycidyl esters and / or triglycidyl esters. Aromatic, aralipatic, cycloaliphatic, heterocyclic, heterocyclic-aliphatic or heterocyclic-aromatic dicarboxylic acids having 6 to 20, preferred 6 to 12 ring carbon atoms, or 2 to 10 carbon atoms It can be derived from aliphatic dicarboxylic acid having a. For example, optionally substituted epoxy resins of Formula IV or Formula V are preferred:

[Formula IV]

[Formula Ⅴ]

Examples are glycidyl ethers derived from phenol-novolak-resins or cresol-novolak-resins as well as glycidyl ethers derived from bisphenol A or bisphenol F.

Cycloaliphatic epoxy resins are for example hexanehydro-o-phthalic acid-bis-glycidyl ether, hexanehydro-m-phthalic acid-bis-glycidyl ester or hexanehydro-p-phthalic acid- Bis-glycidyl ester. Aliphatic epoxy resins such as 1,4-butane-diol diglycidyl-ether may also be used as components for the compositions of the present invention.

Within the present invention, aromatic and / or cycloaliphatic epoxy resins which also contain at least one, preferably at least two, aminoglycidyl groups in the molecule are preferred. Such epoxy resins are known and are described, for example, in WO 99/67315. Preferred compounds are those of the formula (VI):

[Formula VI]

Particularly suitable aminoglycidyl compounds are N, N-diglycidyl-aniline, N, N-diglycidyl toluidine, N, N, N ', N'-tetraglycidyl-1,3-diamino Benzene, N, N, N'N'- tetraglycidyl-1,4-diaminobenzene, N, N, N ', N'- tetraglycidylsilylenediamine, N, N, N', N '-Tetraglycidyl-4,4'-diaminodiphenylmethane, N, N, N', N'-tetraglycidyl-3,3'-di-ethyl-4,4'-diaminodi Phenylmethane, N, N, N ', N'-tetraglycidyl-3,3'-diaminodiphenylsulfone, N, N'-dimethyl-N, N' diglycidyl-4,4'- Diaminodiphenylmethane, N, N, N ', N'-tetraglycidyl-alpha, alpha'-bis (4-aminophenyl) -p-diisopropylbenzene and N, N, N', N ' Tetraglycidyl-alpha, alpha'-bis- (3,5-dimethyl-4-aminophenyl) -p-diisopropylbenzene. Preferred aminoglycidyl compounds are also aminoglycidyl compounds of formula (VII) or formula (VII).

[Formula Ⅶ]

[Formula Ⅷ]

Further aminoglycidyl compounds that can be used according to the invention are described, for example, in Houben-Weyl, Methoden der Organischen Chemie, Band E20, Makromolekulare Stoffe, Georg Thieme Verlag Stuttgart, 1987, pages 1926-1928.

Curing agents to be used in epoxy resins are known. Curing agents are, for example, hydroxyl and / or carboxyl containing polymers such as carboxyl terminated polyester and / or carboxyl containing acetate- and / or methacrylate polymers and / or carboxylic acid anhydrides. Useful curing agents are further cyclic anhydrides of aromatic, aliphatic, cycloaliphatic and heterocyclic polycarboxylic acids. Preferred anhydrides of aromatic polycarboxylic acids are phthalic acid anhydrides, substituted derivatives thereof, benzene-1,2,3,4,5-tetracarboxylic acid dianhydride and substituted derivatives thereof. Many further curing agents are in the literature.

Optional curing agents may be used at concentrations in the range of 0.2 to 1.2 of one anhydride group per equivalent of the curing group present, for example one epoxide equivalent. However, concentrations in the range of 0.2 to 0.4 equivalents of the curing group are often preferred.

As an optional additive, the composition is a curing agent, at least one wet / dispersant, plasticizer, antioxidant, light absorber, as well as at least a curing agent for improving the polymerization of the epoxy resin with additional additives used in electrical applications. It may further include an accelerator.

Curing agents for improving the polymerization of epoxy resins with curing agents include, for example, amine-complexes such as tertiary amines such as benzyldimethylamine, or complexes of tertiary amines with boron trichloride or boron trifluoride; Urea derivatives such as N-4-chlorophenyl-N ', N' = dimethylurea {Monuron}; Optionally substituted imidazole such as imidazole or 2-phenyl-imidazole. Tertiary amines are preferred. Other curing catalysts such as cobalt (III), copper, manganese, (II), zinc transition metal complexes, such as cobalt acetylacetonate (III), may be used in acetylacetonate. The amount of accelerator used is at a concentration of about 50-1000 ppm weight ratio and is calculated for the composition to be cured.

Wet / dispersants include, for example, surface active agents; Or reactive diluents, preferably epoxy- or hydroxyl-containing reactive diluents; It is known in the form of thixotropic agents or resinous modifiers. Known reactive diluents are for example cresylglycidyl ether, diepoxyethyl-1,2-benzene, bisophenol A, bisophenol F and their diglycidyl ether, neopentylglycol-diglycidyl ether or Diepoxides of polyglycols and glycols such as trimethylolpropane-diglycidyl-ether. Commercially preferred wet / dispersant agents which are commercially available are, for example, organic copolymers containing acid groups, for example Byk® W-9010 having an acidic value of 129 mg KOH / g. Such wet / dispersants are preferably used in amounts of 0.5% to 1.0% based on the filler weight.

Plasticizers, antioxidants, light absorbers as well as additional additives used in electrical applications are known in the art and are not important.

Insulating compositions made of epoxy resin are made simply by mixing all the components and curing the mixture by heating, optionally under vacuum, in any desired order. When a reinforcing fiber composite system comprising at least one layer of reinforcing fiber spinning yarn is to be produced, an insulating composition made of epoxy resin optionally mixes all the components under vacuum in any desired order and then reinforces it. It is simply made by adding to at least one layer of fiber rovings.

Preferably, the curing agent and curing agent are added separately before curing. The curing temperature is preferably in the range of 50 ° C to 280 ° C, preferably in the range of 100 ° C to 200 ° C. Curing is generally also at low temperatures, and at low temperatures complete curing can also last for several days depending on the catalyst present and its concentration.

The casting of the composition of uncured monomers into the mold is preferably made in combination with the application of pressure, preferably by using a vacuum technique so that the mold is filled and at least one layer of reinforcing material in the mold is completely injected. Vibration methods can also be applied to improve injection and minimize air bubbles. The non-cured insulating resin composition is particularly preferably vacuum cast or automatic pressure gelation (APG) under the application of vacuum or resin transfer molding or vacuum assisted resin transfer molding, optionally to remove all moisture and air bubbles from the insulation composition. ) Is applied by using the manufacturing process. The encapsulation composition can then be cured by any method known in the art by heating the composition to the desired curing temperature.

The electrical insulation system according to the invention is suitable for use in gas-insulated and metal-wound electrical applications, such as electro-isolated applications, preferably electrical gas-insulated switchgear applications, preferably pressurized gas-insulated switchgear stations (GIS), Or in the manufacture of life-tank breakers, dead-tank breakers and related applications.

The electrical insulation system according to the invention can also be used for the production of high voltage insulators, especially outdoor insulators associated with high voltage lines, for transformers, indoor and outdoor use, for example as long-rod composite and cap-type insulators. have. The following example illustrates the invention.

1 is a graph depicting the load (N) and extension (mm) for PET spinning yarn reinforced rods and PEN spinning yarn reinforced rods.

Example 1

The epoxy resin composition compositions A and B are made of the components given in Table 1. The composition is prepared by thoroughly mixing the epoxy resin, the curing agent and the accelerator at a temperature of 80 ° C. The mixture is then outgassed at 80 ° C. under vacuum. The mixture is then used with vacuum injection to create an insulating rod and a working rod by adding an uncured epoxy composition to a mold comprising dry windings of rovings (always made of PEN- or PET-fibers). Delivered to the mold. The composition is then cured at 140 ° C. for 10 hours.

Definition of raw materials

CY 228 Bisphenol A Epoxy Resin

HY 918 modified carbonyl anhydride

EPC 845 Modified Tertiary Amine

Type T112-110 from PEN-Fiber Performance Fibers GmbH

PET-Fiber Type T711 from Performance Fibers GmbH

CY228 HY918 EPC 845 Reinforced fiber Structure A 100 85 2 PEN-fiber Structure B 100 85 2 PET-fiber

PET  And PEN  Comparison between reinforcing rods

The test results show that the mechanical properties of the PEN-fiber reinforced component made from configuration A are superior to the mechanical properties of the PET-fiber reinforced component made from configuration B. Tensile tests performed on PET and PEN reinforced epoxy rods show that there is a sufficient increase in stiffness and load to failure (FIG. 1).

Example 2

Epoxy resin composition Compositions C and D are made from the components given in Table 2. The composition is prepared by thoroughly mixing the epoxy resin, the curing agent and the accelerator at a temperature of 80 ° C. The mixture is then degased under vacuum at 80 ° C. The mixture is then used with vacuum injection to create an insulating rod and a working rod by adding the uncured epoxy composition to a mold comprising dry spinning of the spinning yarn (always made of Vectran®, or Kevlar fibers). Delivered to the mold. Thereafter, the composition is cured at 140 ° C. for 10 hours.

Definition of Raw Material:

CY 228 Bisphenol A Epoxy Resin

HY 918 modified carboxyl anhydride

EPC 845 Modified Tertiary Amine

Copolyester of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid in the form of fiber rovings from Vectran® Kuraray America, Inc.

Aramid Fiber Roving Yarn from Kevlar DuPont

CY228 HY918 EPC 845 Reinforced fiber Structure C 100 85 2 Vectran (registered trademark) Structure D 100 85 2 Kevlar

Vectran (Registered trademark) and Kevlar  Comparison between Reinforcing Rods

The moisture intake of Vectran is significantly lower than that of Kevlar. The drying step before the injection of reinforcing fibers is only necessary for Kevlar. Kevlar's substitution with Vectran®, due to its low moisture content, makes the insulation more efficient and makes the product more suitable for electrical insulation applications.

Claims (17)

An electrical insulation system suitable for use in electrical gas-insulated switchgear applications, preferably gas-insulated and metal-wrapped electrical applications, wherein the electrical insulation system comprises a solidified polymer composition and a reinforcing fiber. To
The reinforcing fibers are polyethylene naphthalate (PEN) fibers, polybutylene naphthalate (PBN) fibers, fibers which are copolyesters of bisphenol A and / or bisphenol F with naphthalene dicarboxylic acid, hydroxy-benzoic acid and A fiber which is a copolyester of hydroxy-naphthoic acid, preferably p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, or a mixture of these fibers, wherein the reinforcing fiber composite system is optional Electrical insulation system, characterized in that it may contain further additives. The electrical insulation system according to claim 1, wherein the reinforcing fibers are present in the form of chopped fibers having an average length in the range of preferably 0.5 mm to 15 mm, preferably 1.0 mm to 8 mm. 3. The method of claim 1 or 2, wherein the reinforcing fibers are present as dry continuous nonwoven fabrics, or as fiber spun yarns or as woven fabrics or non-crimp fabrics. Electrical insulation system. The electrical insulation system according to claim 1, wherein the system comprises a combination of chopped fibers and / or continuous fibers and / or fiber rovings or cloths. . The reinforcing fibers according to any one of the preceding claims, wherein the reinforcing fibers are in the range of 20 to 70 w%, preferably in the range of 30 to 60 w%, preferably 35 to 55, of the total weight of the fiber reinforced composite system. Electrical insulation system, characterized in that it is present in an amount within the w% range. The polymer of claim 1, wherein the polymer of the polymer composition is selected from the group comprising an epoxy resin system, polyurethane, polyester, polyamide, polybutylene terephthalate and polydicyclopentadiene. Electrical insulation system. 7. The polymer according to claim 6, wherein the polymer is a duroplastic polymer selected from an epoxy resin system and a polyurethane, preferably an epoxy resin system, preferably an epoxy value in the range of 4.9 to 5.1 (equivalent / 100 g) or more. Electrical insulation system, characterized in that it is an epoxy resin, preferably made from an aromatic and / or cycloaliphatic compound. The reinforcing fiber composite system according to claim 1, wherein the reinforcing fiber composite system is a component selected from filler materials, wet / dispersants, plasticizers, antioxidants, light absorbers, silicones, and additional additives commonly used in electrical applications. An electrical insulation system, characterized in that it further comprises. The total amount of reinforcing fibers, fillers and optional additional additives present is at most 80 w%, and preferably at most 70 w% of the total weight of the reinforcing fiber composite system. Electrical insulation system. 10. The composite system according to claim 1, wherein the composite system is a mineral filler of micro or nano size grain size dispersion, or a mixture of such materials, preferably in the range of 1 μm to 500 μm, preferably 5. An electrical insulation system, characterized in that it contains a mineral filler material of micro size grain size dispersion in the range of μm to 100 μm. The electrical insulation system according to claim 10, wherein the mineral filler is selected from a filler material that is stable compared to degradation products of sulfur hexafluoride. 12. A method for producing an electrical insulation system according to any one of the preceding claims, wherein
(Iii) fibers that are copolyesters of bisphenol A and / or bisphenol F with polyethylene naphthalate (PEN) fibers, polybutylene naphthalate (PBN) fibers, naphthalene dicarboxylic acids, hydroxy-benzoic acid and hydroxides Selected from copolyesters of hydroxy-naphthoic acids, preferably copolyesters of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, or mixtures of these fibers, and optionally further additives The chopped reinforcing fibers are incorporated into a single amount starting material of each polymer, preferably an epoxy resin composition, so as to be uniformly dispersed therein, and (ii) the dispersion is optionally with the aid of a molding tool. Formed, cured and optionally post-cured into a desired shape. 12. A method for producing an electrical insulation system according to any one of the preceding claims, wherein
(i) providing a mold for an article comprising at least one dry layer of reinforcement material, the reinforcement material being a continuous nonwoven yarn and / or at least one fiber spun yarn and / or at least one woven fabric in the mold. Providing a mold comprising a fabric; (Ii) casting an uncured monomer composition, preferably an epoxy resin mixture of monomers, into the mold such that the mold is filled and at least one layer of reinforcing material is completely injected; (Iii) curing the monomer composition in the mold at a suitable temperature for a time long enough to cure; (Iii) optionally post-curing the obtained reinforced fiber composite system. The method of claim 13, wherein casting of the composition of the uncured monomer into the mold is accomplished by using vacuum technology and / or pressure under selective application of the method of vibration. 15. The method of claim 14, wherein the uncured insulating resin composition comprises vacuum casting; Or automatic pressure gelation (APG) manufacturing process optionally under vacuum application; Or resin transfer molding; Or by using a vacuum assisted resin transfer molding. 12. An electrical gas-insulated switchgear application, preferably a gas-insulated, metal-wrapped electrical application, preferably a pressurized gas-insulated switchgear station (GIS) or spacer insulator and associated application. Method of use of the electrical insulation system according to claim 1. An electrical gas-insulated switchgear application, preferably a gas-insulated, metal-wound electrical application, preferably a pressurized gas-insulated switchgear station, comprising an electrical insulation system as defined in claim 1. GIS) or spacer insulators and related applications.

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