CN105985717A - Preparation method of polyester enameled wire enamel - Google Patents
Preparation method of polyester enameled wire enamel Download PDFInfo
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- CN105985717A CN105985717A CN201510060970.5A CN201510060970A CN105985717A CN 105985717 A CN105985717 A CN 105985717A CN 201510060970 A CN201510060970 A CN 201510060970A CN 105985717 A CN105985717 A CN 105985717A
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Abstract
The invention relates to a preparation method of a polyester enameled wire enamel. The method comprises the following steps: (1) 1 part of dimer acid, 2 parts of terephthalic acid, 1 part of oligomeric polyester diol, 1 part of ethylene glycol, and 1.85 parts of glycerin are sequentially added under stirring; after the materials are added, the temperature is increased to 122 DEG C; (2) the temperature is increased to 240 DEG C with a speed of 8.5 DEG C/h; the temperature is maintained for 2.4h, and vacuuming is carried out; (3) a certain amount of a cresol solvent is added; the temperature is reduced to 186 DEG C, and is maintained for 3h; and (4) the above prepared resin is stirred with cresol and xylene for diluting, until a needed solid content is reached.
Description
Technical field
The present invention is a kind of polyester wire enamel and preparation method thereof, relates to a kind of water resistant polyester wire enamel and preparation method thereof.
Background technology
Need to use the preferable wire enamel of resistance to water in some special occasions, and resistance to water paint is based on epoxy resin at present, other is such as polyamidoimide, acetal, poly-glycolylureas etc. are also the reasonable paints of resistance to water, and polyester, polyimides, polyurethane, non-THEIC polyester-imide etc. is easily hydrolyzed, resistance to water is poor, even but the paint vehicle of resistance to water, as enamel-covered wire, owing to enamelled coating is relatively thin, it is used alone and also has certain limit, therefore at some special occasions, also need to use after more whole coil epoxy resin being processed after enamel-covered wire outer layer covers layer of polyethylene when motor as worked in water uses.So coat enamel-covered wire process complex, reduce production efficiency.We by introducing dimeric dibasic acid and the oligomeric polyester dihydroxylic alcohols of band hydrophobic side chain when preparing polyester, thus is greatly promoted the resistance to water of wire enamel, it is not necessary to does extra process and i.e. can reach good water-fast effect.
Summary of the invention
It is an object of the invention to provide a kind of water resistant polyester wire enamel and preparation method thereof.
The present invention by introducing dimeric dibasic acid and the oligomeric polyester dihydroxylic alcohols of band hydrophobic side chain when preparing polyester, thus promotes the resistance to water of wire enamel, reaches good water-fast effect.
The water resistant polyester wire enamel component that the present invention relates to and proportioning thereof are as follows:
Dimeric dibasic acid and p-phthalic acid mol ratio with hydrophobic side chain are 1: 1～1: 22；The mol ratio of oligomeric polyester dihydroxylic alcohols and ethylene glycol is 1: 1～1: 22；Dimeric dibasic acid and the ratio of p-phthalic acid integral molar quantity and oligomeric polyester dihydroxylic alcohols and ethylene glycol integral molar quantity with hydrophobic side chain are 1:1 to 1:1.2, and the ratio of the dimeric dibasic acid of band hydrophobic side chain and p-phthalic acid integral molar quantity and glycerol mole is 1: 0.5 to 1: 0.7.
The preparation method of above-mentioned water resistant polyester wire enamel includes:
Water resistant polyester resin is synthesized initially with the dimeric dibasic acid of band hydrophobic side chain, oligomeric polyester dihydroxylic alcohols, p-phthalic acid, ethylene glycol, glycerol.This preparation process includes, is sequentially added into ethylene glycol, oligomeric polyester dihydroxylic alcohols, glycerol, the dimeric dibasic acid of band hydrophobic side chain and p-phthalic acid, is warming up to 118-158 DEG C after feeding intake under stirring.Then being warming up to 205-245 DEG C with the speed of 8-12 DEG C per hour, be incubated 1.5-3 hour, evacuation (is preferably evacuated to theoretical liquid outlet quantity).Add some cresol solvents and be cooled to 170-190 DEG C, be incubated 2.5-3.5 hour.Take the above-mentioned resin prepared, add some cresol and dimethylbenzene agitation and dilution to required solid content.
Further preferred scheme is: the preparation method of polyester wire enamel, comprising:
1) under stirring, it is sequentially added into 1 part of dimeric dibasic acid, 2 parts of p-phthalic acids, 1 part of oligomeric polyester dihydroxylic alcohols, 1 part of ethylene glycol, 1.85 parts of glycerol, after feeding intake, is warming up to 122 DEG C；
2) then it is warming up to 240 DEG C with the speed of per hour 8.5 DEG C, is incubated 2.4 hours, evacuation；
3) add some cresol solvents and be cooled to 186 DEG C, be incubated 3 hours；
4) take the above-mentioned resin prepared, add cresol and dimethylbenzene stirring, be diluted to required solid content.
The dimeric dibasic acid of described band hydrophobic side chain is prepared by clay catalytic dimerization method by C 18 unsaturated fatty acid.
Further preferred scheme is: described oligomeric polyester dihydroxylic alcohols is prepared with ethylene glycol condensation by adipic acid.
Compared with prior art, have the advantage that with the water resistant polyester wire enamel of the present invention
1, when coating water-proof paint envelope curve without other steps, water-proofing treatment need not be additionally carried out, a step completes to coat, is greatly improved production efficiency.
2, the enamel-covered wire resistance to water made is greatly promoted, and under room temperature, water resisting time is more than or equal to 150 hours, much larger than the water resisting time below prior art 50H.
3, the wire enamel made does not has consistency problem, wide adaptability, technique remaining width.
Detailed description of the invention
Comparative example
Use prior art polyester wire enamel (such as the STE 30L product of Danyang Sida Chemical Co., Ltd), coat enamel-covered wire at a high speed.
Embodiment 1
Obtain dimeric dibasic acid initially with ready denier oil acid by clay catalytic dimerization legal system, obtain oligomeric polyester dihydroxylic alcohols by the condensation of adipic acid with ethylene glycol.
Under stirring, it is sequentially added into 0.51 part of dimeric dibasic acid, 1.52 parts of p-phthalic acids, 1 part of oligomeric polyester dihydroxylic alcohols, 1 part of ethylene glycol, 1.22 parts of glycerol by following proportioning, after feeding intake, is warming up to 140 DEG C.Then it is warming up to 225 DEG C with the speed of per hour 10.5 DEG C, is incubated 2.2 hours, is evacuated to liquid outlet quantity.Add cresol solvent and be cooled to 180 DEG C, be incubated 3.2 hours.
Take the above-mentioned resin prepared, add cresol and dimethylbenzene agitation and dilution to required solid content.
The water resistant polyester wire enamel prepared by above-mentioned steps is used to coat enamel-covered wire.
Embodiment 2
Obtain dimeric dibasic acid initially with ready denier oil acid by clay catalytic dimerization legal system, obtain oligomeric polyester dihydroxylic alcohols by the condensation of adipic acid with ethylene glycol.
Under stirring, it is sequentially added into 1 part of dimeric dibasic acid, 1 part of p-phthalic acid, 1 part of oligomeric polyester dihydroxylic alcohols, 2 parts of ethylene glycol, 1.2 parts of glycerol by following proportioning, after feeding intake, is warming up to 145 DEG C.Then it is warming up to 206 DEG C with the speed of per hour 9 DEG C, is incubated 2 hours, is evacuated to liquid outlet quantity.Add cresol solvent and be cooled to 185 DEG C, be incubated 3.2 hours.
Take the above-mentioned resin prepared, add cresol and dimethylbenzene agitation and dilution to required solid content.
The water resistant polyester wire enamel prepared by above-mentioned steps is used to coat enamel-covered wire.
Embodiment 3
Obtain dimeric dibasic acid initially with linoleic acid by clay catalytic dimerization legal system, obtain oligomeric polyester dihydroxylic alcohols by the condensation of adipic acid with ethylene glycol.
Under stirring, it is sequentially added into 1 part of dimeric dibasic acid, 2 parts of p-phthalic acids, 1 part of oligomeric polyester dihydroxylic alcohols, 1 part of ethylene glycol, 1.85 parts of glycerol by following proportioning, after feeding intake, is warming up to 122 DEG C.Then it is warming up to 240 DEG C with the speed of per hour 8.5 DEG C, is incubated 2.4 hours, is evacuated to liquid outlet quantity.Add cresol solvent and be cooled to 186 DEG C, be incubated 3 hours.
Take the above-mentioned resin prepared, add cresol and dimethylbenzene agitation and dilution to required solid content.
The water resistant polyester wire enamel prepared by above-mentioned steps is used to coat enamel-covered wire.
Embodiment 4
Obtain dimeric dibasic acid initially with linoleic acid by clay catalytic dimerization legal system, obtain oligomeric polyester dihydroxylic alcohols by the condensation of adipic acid with ethylene glycol.
Under stirring, it is sequentially added into 1 part of dimeric dibasic acid, 3 parts of p-phthalic acids, 1 part of oligomeric polyester dihydroxylic alcohols, 3 parts of ethylene glycol, 2.4 parts of glycerol by following proportioning, after feeding intake, is warming up to 148 DEG C.Then it is warming up to 230 DEG C with the speed of per hour 11 DEG C, is incubated 2.7 hours, is evacuated to liquid outlet quantity.Add cresol solvent and be cooled to 181 DEG C, be incubated 2.3 hours.
Take the above-mentioned resin prepared, add cresol and dimethylbenzene agitation and dilution to required solid content.
The water resistant polyester wire enamel prepared by above-mentioned steps is used to coat enamel-covered wire.
Comparative example and embodiment performance test list:
| Comparative example | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Circular copper wire diameter/mm | 0.600 | 0.600 | 0.600 | 0.600 | 0.600 |
| Enamel-covered wire external diameter/mm | 0.623 | 0.622 | 0.621 | 0.622 | 0.621 |
| Outward appearance | Smooth | Smooth | Smooth | Smooth | Smooth |
| Water resisting time (h, 25 DEG C) | 30 | 180 | 200 | 230 | 225 |
Claims (3)
1. the preparation method of a polyester wire enamel, it is characterised in that including:
1) under stirring, it is sequentially added into 1 part of dimeric dibasic acid, 2 parts of p-phthalic acids, 1 part of oligomeric polyester dihydroxylic alcohols, 1 part of ethylene glycol, 1.85 parts of glycerol, after feeding intake, is warming up to 122 DEG C；
2) then it is warming up to 240 DEG C with the speed of per hour 8.5 DEG C, is incubated 2.4 hours, evacuation；
3) add some cresol solvents and be cooled to 186 DEG C, be incubated 3 hours；
4) take the above-mentioned resin prepared, add cresol and dimethylbenzene stirring, be diluted to required solid content.
2. according to the preparation method of the polyester wire enamel described in claim 2, it is characterised in that: the dimeric dibasic acid of described band hydrophobic side chain is prepared by clay catalytic dimerization method by C 18 unsaturated fatty acid.
3. according to the preparation method of the polyester wire enamel described in claim 2, it is characterised in that: described oligomeric polyester dihydroxylic alcohols is prepared with ethylene glycol condensation by adipic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060970.5A CN105985717A (en) | 2015-02-05 | 2015-02-05 | Preparation method of polyester enameled wire enamel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060970.5A CN105985717A (en) | 2015-02-05 | 2015-02-05 | Preparation method of polyester enameled wire enamel |
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| Publication Number | Publication Date |
|---|---|
| CN105985717A true CN105985717A (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510060970.5A Pending CN105985717A (en) | 2015-02-05 | 2015-02-05 | Preparation method of polyester enameled wire enamel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853837A (en) * | 2019-10-24 | 2020-02-28 | 浙江三行电气科技有限公司 | Production process of water-blocking enameled wire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3312573A (en) * | 1963-05-06 | 1967-04-04 | Schenectady Chemical | Non-linear overcoat for coated electrical conductor |
| CN1111668A (en) * | 1995-04-06 | 1995-11-15 | 中国石化扬州石油化工公司 | Novel process for producing polyester wire enamel by normal pressure esterification of terephthalic acid |
| CN1670054A (en) * | 2004-03-19 | 2005-09-21 | 杨朝选 | Preparation of wire coated paint of polyester paint and polyester imine paint by using terephthalic acid |
| CN102153939A (en) * | 2011-01-26 | 2011-08-17 | 汕头市天方达新材料科技有限公司 | Modifier for polyester enamelled wire insulating paint, and preparation method and application thereof |
| CN102161860A (en) * | 2011-02-14 | 2011-08-24 | 广东恒宝昌电工科技股份有限公司 | Preparation method of organic silicon modified polyester wire enamel |
-
2015
- 2015-02-05 CN CN201510060970.5A patent/CN105985717A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3312573A (en) * | 1963-05-06 | 1967-04-04 | Schenectady Chemical | Non-linear overcoat for coated electrical conductor |
| CN1111668A (en) * | 1995-04-06 | 1995-11-15 | 中国石化扬州石油化工公司 | Novel process for producing polyester wire enamel by normal pressure esterification of terephthalic acid |
| CN1670054A (en) * | 2004-03-19 | 2005-09-21 | 杨朝选 | Preparation of wire coated paint of polyester paint and polyester imine paint by using terephthalic acid |
| CN102153939A (en) * | 2011-01-26 | 2011-08-17 | 汕头市天方达新材料科技有限公司 | Modifier for polyester enamelled wire insulating paint, and preparation method and application thereof |
| CN102161860A (en) * | 2011-02-14 | 2011-08-24 | 广东恒宝昌电工科技股份有限公司 | Preparation method of organic silicon modified polyester wire enamel |
Non-Patent Citations (2)
| Title |
|---|
| 柯利茨基等: "《电工材料手册 第一卷 第一册》", 31 August 1963 * |
| 陈冠荣等: "《化工百科全书 第3卷》", 31 March 1993 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853837A (en) * | 2019-10-24 | 2020-02-28 | 浙江三行电气科技有限公司 | Production process of water-blocking enameled wire |
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