A kind of heat-and-humidity resistant solvent-free dipping varnish and preparation method thereof

A solvent-free impregnating paint, heat-and-moisture-resistant technology, applied in coatings, polyester coatings, fire-retardant coatings, etc., can solve the problems of poor heat-and-moisture resistance and limited breadth, achieve excellent heat-and-moisture resistance, ensure heat-and-moisture resistance, and improve paint The effect of film adhesion

Active Publication Date: 2019-04-23
ZHUZHOU TIMES ELECTRIC INSULATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary unsaturated polyester resins have poor moisture and heat resistance, which limits their wide application

Method used

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  • A kind of heat-and-humidity resistant solvent-free dipping varnish and preparation method thereof
  • A kind of heat-and-humidity resistant solvent-free dipping varnish and preparation method thereof
  • A kind of heat-and-humidity resistant solvent-free dipping varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A heat-and-humidity resistant solvent-free impregnating varnish of the present invention is prepared from the following raw materials in parts by weight:

[0034] 32kg polybasic acid (8kg isophthalic acid, 6kg succinic acid, 18kg maleic anhydride),

[0035] 28kg polyol A (3kg Saike, 15kg neopentyl glycol, 10kg dipropylene glycol),

[0036] 12kg polyol B (2-butyl-2-ethyl 1,3-propanediol),

[0037] 3kg modified imine resin (tetrahydrophthalic anhydride imine ethyl alcohol),

[0038] 28kg reactive diluent (vinyltoluene),

[0039] 0.1kg stabilizer (hydroquinone),

[0040] 1.2kg initiator (cumene peroxide),

[0041] 0.8 kg of adhesion promoter (vinyl tri-tert-butyl silicon peroxide).

[0042] The preparation method of the heat-and-humidity resistant solvent-free dipping varnish of the present embodiment, comprises the following steps:

[0043] (1) Add 12kg of 2-butyl-2-ethyl 1,3-propanediol, 8kg of isophthalic acid, 3kg of Saike, and 6kg of neopentyl glycol into the re...

Embodiment 2

[0046] A heat-and-humidity resistant solvent-free dipping varnish of the present invention is mainly prepared from the following raw materials in parts by weight:

[0047] 39kg polybasic acid (6kg trimellitic anhydride, 4kg adipic acid, 21kg maleic acid, 8kg dimer fatty acid),

[0048] 13kg Polyol A (6kg Neopentyl Glycol, 7kg Hexylene Glycol),

[0049] 24kg polyol B (16kg2,2,4-trimethyl-1,3-pentanediol, 8kg1,4-cyclohexanedimethanol),

[0050] 6kg modified imine resin (methyltetrahydrophthalic anhydride imine ethyl alcohol),

[0051] 38kg reactive diluent (diallyl phthalate),

[0052] 0.06kg2-tert-butylhydroquinone,

[0053] 0.01kg methyl hydroquinone,

[0054] 1kg tert-butyl perbenzoate,

[0055] 0.2 kg of vinylmethyldi-tert-butylperoxysilane.

[0056] The preparation method of the heat-and-humidity resistant solvent-free dipping varnish of the present embodiment, comprises the following steps:

[0057] (1) Add 16kg of 2,2,4-trimethyl-1,3-pentanediol, 8kg of 1,4-cyclohe...

Embodiment 3

[0060] A heat-and-humidity resistant solvent-free dipping varnish of the present invention is mainly prepared from the following raw materials in parts by weight:

[0061] 33kg polybasic acid (6kg phthalic anhydride, 9kg sebacic acid, 18kg maleic anhydride),

[0062] 8kg polyol A (neopentyl glycol),

[0063] 39kg polyol B (19kg 2-butyl-2-ethyl 1,3-propanediol, 20kg hydrogenated bisphenol A),

[0064] 8kg imine resin (methyltetrahydrophthalic anhydride imide ethyl alcohol),

[0065] 26kg reactive diluent (styrene),

[0066] 0.1kg 2,5-di-tert-butylhydroquinone,

[0067] 1kg ethyl-3,3-bis(tert-butylperoxy)butyrate,

[0068] 3.2kg 1,1-tert-butyl-diperoxy-4-hydroxycyclohexyltrimethoxysilane.

[0069] The preparation method of the heat-and-humidity resistant solvent-free dipping varnish of the present embodiment:

[0070] (1) Add 19kg of 2-butyl-2-ethyl 1,3-propanediol, 20kg of hydrogenated bisphenol A and 6kg of phthalic anhydride into the reaction kettle, and after mixing ev...

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Abstract

The invention discloses damp-heat resistant solvent-free impregnating varnish, which is mainly prepared from the following raw materials (by weight): 30-40 parts of polyprotic acid, 5-30 parts of polyol A, 10-40 parts of polyol B, 2-10 parts of a modified imine resin, 25-40 parts of an active diluent, 1-5 parts of auxiliary agents (a stabilizing agent, an initiator and an adhesion auxiliary agent). A preparation method comprises the following steps: adding polyprotic acid, polyol A and polyol B into a reaction vessel and reacting to obtain a prepolymer, adding modified imine resin and reacting, finally adding the stabilizing agent, the mixed diluent, the initiator and the adhesion auxiliary agent and uniformly mixing to obtain the damp-heat resistant solvent-free impregnating varnish. Through polymerization of secondary carbon hydroxymethyl or secondary hydroxyl polyol, tertiary carbon hydroxymethyl polyol and polyacid, alkyl group on the secondary carbon or tertiary carbon can effectively protect ester bond on the secondary carbon or tertiary carbon. Thus, damp-heat resistance of the impregnating varnish is greatly enhanced.

Description

technical field [0001] The invention belongs to the field of impregnating varnishes, in particular to a heat-and-humidity resistant solvent-free impregnating varnish and a preparation method thereof. Background technique [0002] Impregnation varnish is used to impregnate motors, electrical coils, fill gaps and micropores in the insulation system, and form a continuous paint film on the surface of the impregnated object, and make the coils bonded into a solid whole, which can effectively improve the insulation system. Integrity, thermal conductivity, moisture resistance, dielectric strength and mechanical strength and other properties. Unsaturated polyester impregnating varnish has the characteristics of fast curing, low cost and good manufacturability. It is an important branch of impregnating varnish, especially unsaturated polyesterimide resin has become an important development direction of high temperature resistant solvent-free impregnating varnish. . However, common...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/06C09D7/63C08G63/91C08G63/676C08G63/52
CPCC08G63/52C08G63/676C08G63/918C08K5/13C08K5/5419C08K5/5425C09D5/18C09D7/63C09D167/06
Inventor 王浩新邢国华陈理曾凡辉曾智周伟陈超
Owner ZHUZHOU TIMES ELECTRIC INSULATION
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