Universal refrigerant resistant solvent-free impregnating resin for high and low voltage motor and preparation method thereof

Abstract

The invention relates to a universal refrigerant resistant solvent-free impregnating resin for a high and low voltage motor and a preparation method thereof. The impregnating resin is composed of 45-65 parts of unsaturated polyesterimide resin solution with 65-75% of solid content, 15-35 parts of oxazolidone resin solution with 75-85% of solid content, 10-25 parts of environment-friendly dilutingagent, 3-8 parts of curing agent, 1-3 parts of initiating agent and 0.01-0.06 part of polymerization inhibitor; the raw material formula of an unsaturated polyesterimide resin comprises a first monomer, a second monomer and a third monomer, wherein the first monomer is selected from one or multiple of neopentyl glycol, propoxylation bisphenol A and trihydroxyethyl isocyanurate; the second monomeris selected from one or multiple of isophthalic acid, hexanedioic acid, trimellitie anhydride and maleic anhydride; and the third monomer is a compound containing imide groups. The resin provided by the invention has low content of VOC (Volatile Organic Compounds), resists novel refrigerating fluids such as R134a and is universal for the high and low voltage motor.

Description

Technical field [0001] The invention belongs to the technical field of insulating impregnating resin (vacuum pressure impregnation), and particularly relates to a general-purpose solvent-free impregnating resin for high and low voltage motors resistant to refrigerant and a preparation method thereof. Background technique [0002] Motors, transformers and other electrical windings can only operate safely and reliably after they are treated with insulating varnish. After the winding coil is treated with VPI varnish, baking and curing become a whole, which improves the insulation performance and mechanical strength, avoids partial discharge in the internal air gap, improves moisture resistance and salt spray resistance, enhances operational reliability, and extends service life. It is one of the most important links in the motor manufacturing process. A motor cooled by a refrigerant has windings in contact with a refrigerant for a long time. The previously commonly used refrigerant...

AI Technical Summary

Problems solved by technology

[0007] Among the existing refrigerant-resistant insulating varnishes (resins) at home and abroad, the typical example is the CC-1105 insulating varnish of the American DOLPHON company, which has a viscosity greater than 100s (4# viscometer, 25°C). It is used in the insulation treatment of high-voltage motors and requires heating and impregnation. , inconvenient to use, expensive

Domestic Sichuan Dongcai Technology Group Co., Ltd.’s DY001 insulating varnish is used in the insulation treatment of low-voltage motors. The solvent content is greater than 40%, which is highly volatile, pollutes the environment, is not environmentally friendly, and is not suitable for high-voltage motors.

There is no environmentally friendly refrigerant-resistant insulating impregnation resin that can take into account both high and low voltage motors in the market, so it is necessary to develop a new environmentally friendly high and low voltage motor that is free of volatile substances such as styrene and has excellent refrigerant resistance. General Refrigerant Resistant Impregnated Resin

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