Insulating material

 

(57) Abstract:

Usage: the invention relates to refractory insulating materials. The inventive insulating material layer contains slyudinitovyh paper substrate of glass or basalt fabric and adhesive composition in the following ratio, wt. hours: deoxyoligonucleotide (,) 50-200, oligomerisation 15-40, aminopropyltriethoxysilane 1-6, tetrabutoxide 1-6, toluene 200-600. The material according to the invention has a high resistance, mechanical and electrical strength and flexibility.

The invention relates to electrical engineering materials, namely, fire-resistant insulating materials intended primarily for the protection of cables, operating in high temperature conditions.

The prior art insulating materials based on slyudinitovyh paper impregnated with silicone binder (see and.with. USSR N 237218, CL H 01 3/04, 1969.with. USSR N 649046, CL H 01 3/00, 1979 Pat. USA N 3548789, CL 174-122, 1970 CBL. Japan's bid N 51-9000, class C 08 I 59/18, 1976). However, the physico-mechanical properties of such insulating material is inadequate is m based on the epoxy resin layer slyudinitovyh of paper and a layer of glass (see A. with. USSR N 170649, class C 08 I 63/02, 1964.with. USSR N 670592, CL H 01 3/40, 1979.with. USSR N 1749909, CL H 01 3/04, 1992).

The disadvantage of these insulating materials can be attributed to the technological complexity of manufacturing and low elasticity.

Closest to the invention is an insulating material containing layer slyudinitovyh paper, a layer of fiberglass and binder based on hydroxyl-containing low molecular weight polyorganosiloxane (see and.with. USSR N 542247, CL H 01 3/00, 1977). At a sufficiently high resistance and electric strength of this material has not excluded the possibility of delamination slyudinitovyh paper from fiberglass.

The invention is directed to the creation of insulating material having a high resistance, mechanical and electrical strength, flexibility in excluding the possibility of exfoliation slyudinitovyh paper on a substrate of glass or basalt fabric.

The solution of the problem provided by the fact that the insulating material containing layer slyudinitovyh paper substrate of glass and a binder based on silicone polymers according to the invention, as a binder used-200

Oligomerisation (MQ-oligomer) 15-40

-aminopropyltriethoxysilane 1-6

Tetrabutoxide 1-6

Toluene 200-600

Used sljudinitovye paper made from Muscovite by termogidrodinamicheskoe processing with a surface density of 50 to 150 g/m2or made of Muscovite or phlogopite by hydro-mechanical cleavage (without heat treatment) with a surface density of 80 to 250 g/m2and as the substrate used fiberglass woven from filament yarn weighing from 24 to 62 g/m2.

You can use as the substrate of basalt woven fabrics of filament yarn weighing from 24 to 140 g/m2.

The proposed structure of the adhesive composition provides flexibility, additional dielectric strength and temperature resistant insulating material, which eliminates the possibility of delamination slyudinitovyh paper from the substrate even at temperatures above 800oC and results in high physico-mechanical properties of refractory insulation, allowing its use for protection, mainly, security cables, operating in conditions of emergency shall have a roll of fiberglass woven from filament yarn weighing 30 g/m2and roll slyudinitovyh paper from the Muscovite weighing 75 g/m2. On fiberglass, moving with the speed of 2-10 m/min, the dipping method is continuously applied adhesive composition containing, in weight. h:

Deoxyoligonucleotide (,) 100

Oligomerisation (MQ-oligomer) 25

-aminopropyltriethoxysilane 3

Tetrabutoxide 3

Toluene 400

The excess glue is removed by the scraper device. The soaked fiberglass continuously stack sljudinitovye paper, which is impregnated with glue. Received thus stekloduvnoe cloth is fed into the drying chamber at a temperature of 80-140oC the evaporation of the solvent. After drying, the material is cooled at room temperature and wound into a roll. The content of the binder in the finished insulating material 9 to 36 wt. mostly, 15% dielectric strength of the material is not less than 2 kV/layer.

Example 2. Process analogous to example 1. Used fiberglass weighing 35 g/m2and sljudinitovye paper from phlogopite weighing 120 g/m2and, the adhesive composition has the following relationship to the 30

-aminopropyltriethoxysilane 3,5

Tetrabutoxide 3,5

Toluene 500

The electric density of the material is not less than 1.8 kV/layer.

Example 3. Process analogous to example 1. At the same time as the substrate using a fabric with a surface density of 35 g/m2and sljudinitovye paper from phlogopite weighing 160 g/m2and, the adhesive composition has the following ratio of components, wt.h.

Deoxyoligonucleotide (,) 80

Oligomerisation 20

-aminopropyltriethoxysilane 2,5

Tetrabutoxide 2,5

Toluene 300

The electric strength of the material is not less than 2.0 kV/layer.

Insulating material containing layer slyudinitovyh paper substrate on the basis of the fabric of inorganic fibers and a binder based on silicone polymers, characterized in that the binder contains additional tetrabutoxide and toluene, as well as silicone polymers deoxyoligonucleotide (,), oligomerisation and-aminopropyltriethoxysilane in the following ratio, wt.h.

Deoxyoligonucleotide (,) 50 200

Oligomerisation 1

 

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