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Preparation method of environment-friendly polyvinyl acetal enameled wire insulating paint

A polyvinyl acetal and polyvinyl acetal resin technology, applied in the field of functional electronic chemicals, can solve the problems of surrounding environmental pollution, hazards, volatile toxic heavy pollution and corrosive substances, etc., and improve mechanical strength. , Enhance the effect of curing crosslinking degree, good toughness and conductor adhesion

Pending Publication Date: 2022-06-17
江苏佳禾电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acetal paint manufactured by the above method will produce a large amount of volatile toxic, heavily polluting and corrosive substances during the production and use process, which will cause greater occupational health risks to the operators. At the same time, during the coating operation, phenol Aldehyde / aldehyde solvents cause pollution to the surrounding environment and are more harmful

Method used

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  • Preparation method of environment-friendly polyvinyl acetal enameled wire insulating paint
  • Preparation method of environment-friendly polyvinyl acetal enameled wire insulating paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An environment-friendly polyvinyl acetal enameled wire insulating paint preparation method, comprising the following steps:

[0030] Step 1: In parts by mass, take 197 parts of NMP, 297 parts of PMA, and 164 parts of ethyl acetate into a reaction kettle with a condensation reflux device, stir and mix evenly, heat up to 35°C, and put in 168 parts of polyvinyl acetal resin in batches , after the feeding is completed, the temperature is raised to 80 °C with stirring, and the temperature is kept for 2 h until the acetal resin is fully dissolved to obtain a semi-finished product A, which is cooled to 50 °C and kept for later use;

[0031] Step 2: According to mass parts, take 12 parts of NMP, 18 parts of PMA, and 10 parts of ethyl acetate, put them into a reaction kettle with a condensation reflux tube, stir evenly, put in 33.6 parts of 604 epoxy resin, completely dissolve, cool down, and prepare a semi-finished product B;

[0032] Step 3: Gradually add the semi-finished pr...

Embodiment 2

[0035] An environment-friendly polyvinyl acetal enameled wire insulating paint preparation method, comprising the following steps:

[0036] Step 1: According to mass parts, take 233 parts of NMP, 283 parts of PMA, and 150 parts of ethyl acetate into a reaction kettle with a condensation reflux device, stir and mix evenly, heat up to 40 ° C, and put in 168 parts of polyvinyl acetal resin in batches , after the feeding is completed, the temperature is raised to 82 °C with stirring, and the temperature is kept for 2 h until the acetal resin is fully dissolved to obtain a semi-finished product A, which is cooled to 52 °C and kept for standby use;

[0037] Step 2: According to mass parts, take 12 parts of NMP, 15 parts of PMA, and 8 parts of ethyl acetate, put them into a reaction kettle with a condensation reflux tube, stir evenly, put in 31.9 parts of 604 epoxy resin, completely dissolve, cool down, and prepare a semi-finished product B;

[0038] Step 3: Gradually add the semi-f...

Embodiment 3

[0041] An environment-friendly polyvinyl acetal enameled wire insulating paint preparation method, comprising the following steps:

[0042] Step 1: In parts by mass, take 269 parts of NMP, 269 parts of PMA, and 135 parts of ethyl acetate into a reaction kettle with a condensation reflux device, stir and mix evenly, heat up to 42°C, and put in 168 parts of polyvinyl acetal resin in batches , after the feeding is completed, the temperature is raised to 83 °C with stirring, and the temperature is kept for 3 h until the acetal resin is fully dissolved to obtain a semi-finished product A, which is cooled to 53 °C and kept for later use;

[0043] Step 2: According to mass parts, take 12 parts of NMP, 12 parts of PMA, and 6 parts of ethyl acetate, put them into a reaction kettle with a condensation reflux tube, stir evenly, put in 30.2 parts of 604 epoxy resin, dissolve completely, cool down, and prepare a semi-finished product B;

[0044] Step 3: Gradually add the semi-finished produ...

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Abstract

The invention relates to the technical field of functional electronic chemicals, in particular to a preparation method of environment-friendly polyvinyl acetal enameled wire insulating paint, and solves the problems that in the prior art, acetal paint can generate a large amount of volatile toxic, heavy-pollution and corrosive substances in the production and use processes, and the service life of the acetal paint is prolonged. The environment-friendly adhesive comprises the following components: NMP (N-Methyl Pyrrolidone), PMA (Polymethyl Alcohol), ethyl acetate, polyvinyl formal resin and bisphenol A epoxy resin. The polyvinyl formal resin is used as a main film forming substance, good oil-water resistance, excellent toughness and conductor adhesiveness are endowed, heat resistance and chemical resistance are further improved by adopting the heat-resistant novolac epoxy resin F-44, and meanwhile, by utilizing the effects of electronic and chemical materials of the phenolic resin and the epoxy resin, the heat resistance and the chemical resistance are improved. And the yield and reliability of the insulating paint are improved.

Description

technical field [0001] The invention relates to the technical field of functional electronic chemicals, in particular to a preparation method of an environment-friendly polyvinyl acetal enameled wire insulating paint. Background technique [0002] Polyvinyl acetal enameled wire varnish (PVA, PVF) is an electrical insulating varnish with good oil resistance and hydrolysis resistance, which is widely used in the manufacture of oil-immersed transformer winding coils (CTC). [0003] Conventional traditional polyvinyl acetal insulating paint, considering the convenience of raw materials and low cost, all use polyvinyl methyl (acetal) aldehyde (PVF / PVA) as the main film-forming material, together with curing cross-linking Resin, and then use organic solvents such as phenols / furfural / xylene as solvents to combine into the finished polyvinyl acetal insulating paint. The acetal paint manufactured by the above method will produce a large amount of volatile toxic, heavy pollution and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/14C09D163/02C09D5/25C09D7/65C09D7/20
CPCC09D129/14C09D5/00C09D7/65C09D7/20C08L63/04C08L63/00C08L61/06C08L61/20
Inventor 王成宜陈永凤
Owner 江苏佳禾电子材料有限公司