CN105985715A - Polyester wire enamel preparation method capable of improving water resistance of wire enamel - Google Patents
Polyester wire enamel preparation method capable of improving water resistance of wire enamel Download PDFInfo
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- CN105985715A CN105985715A CN201510060563.4A CN201510060563A CN105985715A CN 105985715 A CN105985715 A CN 105985715A CN 201510060563 A CN201510060563 A CN 201510060563A CN 105985715 A CN105985715 A CN 105985715A
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Abstract
The invention relates to a polyester wire enamel preparation method capable of improving the water resistance of wire enamel. The preparation method comprises the following steps of (1) adding 1 part of dimer acid, 3 parts of terephthalic acid, 1 part of oligomeric polyester dihydric alcohol, 3 parts of ethylene glycol and 2.6 parts of glycerol, increasing the temperature of the materials to 150 DEG C after material charging is finished; (2) increasing the temperature to 210 DEG C at 11 DEG C per hour, preserving the temperature for 3 hours, and conducting vacuum pumping; (3) adding some cresol solvent to reduce the temperature to 175 DEG C, preserving the temperature for 3 hours to prepare resin; and (4) adding cresol and dimethylbenzene into the prepared resin, conducting stirring, and conducting dilution to the required solid content.
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, including:
1) 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, 2.6 parts of glycerol, after feeding intake, is warming up to 150 DEG C；
2) then it is warming up to 210 DEG C with the speed of per hour 11 DEG C, is incubated 3 hours, evacuation；
3) add some cresol solvents and be cooled to 175 DEG C, be incubated 3 hours, prepare resin；
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, 2.6 parts of glycerol by following proportioning, after feeding intake, is warming up to 150 DEG C.Then it is warming up to 210 DEG C with the speed of per hour 11 DEG C, is incubated 3 hours, is evacuated to liquid outlet quantity.Add cresol solvent and be cooled to 175 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.
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, 3 parts of p-phthalic acids, 1 part of oligomeric polyester dihydroxylic alcohols, 3 parts of ethylene glycol, 2.6 parts of glycerol, after feeding intake, is warming up to 150 DEG C；
2) then it is warming up to 210 DEG C with the speed of per hour 11 DEG C, is incubated 3 hours, evacuation；
3) add some cresol solvents and be cooled to 175 DEG C, be incubated 3 hours, prepare resin；
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 |
|---|---|---|---|
| CN201510060563.4A CN105985715A (en) | 2015-02-05 | 2015-02-05 | Polyester wire enamel preparation method capable of improving water resistance of wire enamel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060563.4A CN105985715A (en) | 2015-02-05 | 2015-02-05 | Polyester wire enamel preparation method capable of improving water resistance of wire enamel |
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| Publication Number | Publication Date |
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| CN105985715A true CN105985715A (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510060563.4A Pending CN105985715A (en) | 2015-02-05 | 2015-02-05 | Polyester wire enamel preparation method capable of improving water resistance of wire enamel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPH1046036A (en) * | 1996-08-06 | 1998-02-17 | Fuji Photo Film Co Ltd | Thermoplastic resin emulsion |
| CN102718952A (en) * | 2012-07-04 | 2012-10-10 | 佛山市顺德区伊诗德新材料科技有限公司 | Polyester resin for low-temperature cured powder paint and preparation method of polyester resin |
| CN102786868A (en) * | 2012-07-23 | 2012-11-21 | 张家港市丰昌防腐材料有限公司 | Low-viscosity water dispersible polyester paint and its preparation method |
| CN103666214A (en) * | 2013-12-02 | 2014-03-26 | 南通瑞普埃尔生物工程有限公司 | Water soluble polyester resin varnish and preparation method thereof |
-
2015
- 2015-02-05 CN CN201510060563.4A patent/CN105985715A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPH1046036A (en) * | 1996-08-06 | 1998-02-17 | Fuji Photo Film Co Ltd | Thermoplastic resin emulsion |
| CN102718952A (en) * | 2012-07-04 | 2012-10-10 | 佛山市顺德区伊诗德新材料科技有限公司 | Polyester resin for low-temperature cured powder paint and preparation method of polyester resin |
| CN102786868A (en) * | 2012-07-23 | 2012-11-21 | 张家港市丰昌防腐材料有限公司 | Low-viscosity water dispersible polyester paint and its preparation method |
| CN103666214A (en) * | 2013-12-02 | 2014-03-26 | 南通瑞普埃尔生物工程有限公司 | Water soluble polyester resin varnish and preparation method thereof |
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, 中国工业出版社 * |
| 陈冠荣等: "《化工百科全书 第3卷》", 31 March 1993, 化学工业出版社 * |
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Application publication date: 20161005 |