Insulating impregnating compound

 

(57) Abstract:

Use: for isolation of electrical products. The inventive impregnating compound contains: dimethacrylate bis(ethylene glycol)-phthalate 30 - 50, polymethylphenyl siloxane resin, a modified unsaturated polyester 15 - 25, initiator of polymerization of 1 to 2, dimethacrylate bis(triethylene glycol)-phthalate 30 - 50, accelerator of polymerization of 3 to 4. table 1.

The invention relates to the production of materials for electrical products.

Currently known insulating impregnating resins based oligopyrroles in mixtures with unsaturated polyesters, epoxy and silicone resins. Such compounds have a high mechanical, electrical insulating properties, technological and give the ability to automate the processes of impregnation and drying electrical products, and the absence in their composition of solvents makes them more environmentally friendly [1 3]

Closest to the compound according to the invention, its mechanical and electrical insulating characteristics is a compound that includes dimetil-bis-/glycol/phthalate polymethylphenyl siloxane resin, a modified (CL F), but has several disadvantages that limit its use: high rigidity and fragility, the ability to create significant internal stresses lead to cracking and consequently the destruction of time analizowanie wires. In this regard, this material is recommended for impregnation of products made using wires with a diameter of not less than 0.1 mm in Addition, the compound is slow polymerization (20 to 30 minutes at 125 - 130oC) and a large shrinkage (up to 10%).

The purpose of this technical solution is polysinusotomy polymerization of the compound, as well as its elasticity and mechanical strength preserving insulating characteristics under conditions of elevated temperatures and humidity.

This problem is solved by the fact that as oligoadenylates fundamentals compound contains a mixture of dimetil-bis-/triethylene glycol/ phthalate with dimetil-bis-/glycol/phthalate in the following ratio, wt.h.

Dimetil-bis-/glycol/phthalate 30 50

Dimetil-bis-/triethylene glycol/phthalate 30 50

Polymethylphenyl siloxane resin, a modified unsaturated polyester 15 25

The polymerization initiator 1 the Creel-bis-/glycol/phthalate in a ratio of 50 and 30 wt.h. accordingly, add 25 wt.h. polymethylphenyl siloxane resin-modified unsaturated polyester, 3 wt. including accelerator. After mixing, the product is poured into the container. Before applying the compound administered is 1 wt.h. the initiator paste of benzoyl peroxide in dibutyl phthalate (1:1 ratio).

The remaining examples use the same components as in example 1.

Example 2. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-(ethylene glycol)phthalate in a ratio of 40 and 40 wt.h. add 20 wt.h. polymethylphenyl siloxane resin, 4 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound is administered 2 wt.h. the initiator.

Example 3. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 30 and 50 wt.h. accordingly, add 15 wt.h. polymethylphenyl siloxane resin, 3 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound injected 1.5 wt.h. the initiator.

Example 4. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 40 and 40 wt.h. accordingly, add 10 wt.h. polymethylphenyl injected 1.5 wt.h. the initiator.

Example 5. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 60 and 20 wt.h. accordingly, add 30 wt.h. polymethylphenyl siloxane resin, 3 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound is administered 2 wt.h. the initiator.

Example 6. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 20 and 60 wt.h. accordingly, add 20 wt.h. polymethylphenyl siloxane resin, 3 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound is administered 3 wt.h. the initiator.

The compounds of examples 1 to 6 contain the following initiators and accelerators.

Example 1 the initiator paste of benzoyl peroxide in dibutyl THE 16.504.023-79, accelerator desiccant LCD 12, THE 6-21-0204150-1-90.

Example 2 the initiator peroxide dokulil THE 38-402-30-80, accelerator - desiccant LCD 12.

Example 3 a paste of benzoyl peroxide accelerator desiccant LCD 1, THE-6-10-1641-77.

Example 4 the initiator paste of benzoyl peroxide, accelerator desiccant K-1 (solution of bis-n-butylphthalate cobalt in TGM-3 with a binder content of 2.5%).

Eecis of Dicumyl, accelerator-desiccant LCD 1.

The test results of the compounds of examples 1 to 6 are presented in the table.

Insulating impregnating compound, including dimethacrylate bis(ethylene glycol)-phthalate, polymethylphenyl siloxane resin, a modified unsaturated polyester, and a polymerization initiator, characterized in that it further comprises dimethacrylate bis(triethylene glycol)-phthalate and accelerator in the following ratio, wt.h.

Dimethacrylate bis(ethylene glycol)-phthalate 30 50

Polymethylphenyl siloxane resin, a modified unsaturated polyester 15 25

The polymerization initiator 1 2

Dimethacrylate bis(triethylene glycol)-phthalate 30 50

The polymerization accelerator 3 4A

 

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