CN100513500C - Self-curing polyurethane insulating varnish and its production - Google Patents
Self-curing polyurethane insulating varnish and its production Download PDFInfo
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- CN100513500C CN100513500C CNB2007100274764A CN200710027476A CN100513500C CN 100513500 C CN100513500 C CN 100513500C CN B2007100274764 A CNB2007100274764 A CN B2007100274764A CN 200710027476 A CN200710027476 A CN 200710027476A CN 100513500 C CN100513500 C CN 100513500C
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- ammonia ester
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- insulating varnish
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Abstract
A self-curing polyurethane insulating varnish and its production are disclosed. The varnish consists of polyurethane resin 40-100 proportion, antifoaming agent 3-5 proportion, leveling agent 1-3 proportion, urethano-dimethyl benzene 20-30 proportion, urethane-acetate butyrin 5-10 proportion and filler 0-50 proportion. It has fast curing speed, excellent mechanical strength, better adhesion and no need for baking. It can be used for micro-motor, PCB and transformer.
Description
Technical field
The present invention relates to a kind of electric insulation lacquer, the invention still further relates to a kind of preparation method of electric insulation lacquer simultaneously.
Background technology
At present, the insullac general requirement that is used for small-sized electric coil is heating and curing, and in order to guarantee insulation effect, coil must remove tide by preliminary drying before soaking baking, and technology is comparatively complicated.Though general moisture cure urethanes lacquer is normal temperature solidified, because the undesirable surface daub on a wall that only limits to woodenware etc. of electric property and thermotolerance, and can not be used for the insulation processing of electric coil.
Summary of the invention
The object of the present invention is to provide a kind of energy normal temperature solidified polyurethane insulating varnish voluntarily, when being used for the insulation processing of electric coil, electric coil is preliminary drying and direct impregnation is dried not, and the coil machinery electric property after the curing meets the demands, and temperature classification reaches the F level.
Another object of the present invention is to provide the preparation method of the simple self-curing polyurethane insulating varnish of a kind of technology.
A kind of self-curing polyurethane insulating varnish provided by the invention, its component and weight part proportioning are:
Urethane resin 40～100
Defoamer 3～5
Flow agent 1～3
Ammonia ester level dimethylbenzene 20～30
Ammonia ester level N-BUTYL ACETATE 5～10
Filler 0～50.
Urethane resin of the present invention obtains by following prepared: add the reactor stirring with 70～80 parts by Tetra hydro Phthalic anhydride, m-phthalic acid, Sai Ke, TriMethylolPropane(TMP) synthetic polyester polyol and be warming up to 60～70 ℃, slowly be added dropwise to 20～30 parts of tolylene diisocyanates in the still, in 60～70 ℃ of reactions 3～4 hours, add 50～70 parts of ammonia ester level dimethylbenzene, stir being characterized as of the urethane resin of gained: solids content: 60 ± 3%; Nco value: 4-8%; Viscosity (4# cup, 23 ± 2 ℃): 30-60 seconds.
The preparation method of self-curing polyurethane insulating varnish provided by the invention is: 40～100 parts of urethane resins, 3～5 parts of defoamers, 1～3 part of flow agent, 20～30 parts of ammonia ester level dimethylbenzene, 5～10 parts of ammonia ester level N-BUTYL ACETATEs and 0～50 part of filler are added in the mixing kettle successively stir, it is promptly qualified to be ground to fineness with shredder.
Principle of the present invention is: coil dipping or brush this lacquer after, the NCO group that contains in the urethane resin and coil and airborne micro-moisture react, finally generation contains the polyurethane(s) of urea key.The method that adopts material synthesizing polyester polyvalent alcohols such as adding m-phthalic acid, match gram is to improve the thermotolerance and the mechanical electric performance of insullac cured article; Add defoamer to eliminate the carbon dioxide that reaction process produces; Add flow agent and can obtain even, smooth, slick paint film.
Insullac of the present invention has following characteristics: need not baking, and quick solidifying, the physical strength height, bonding force is strong, and what be applicable to micromachine, PCB and transformer (especially high-frequency transformer) commonly immerses, brushes, spray insulating treatment process and the repairing of insulating.
Embodiment
The present invention will be described to enumerate a part of specific embodiment below, is necessary to be pointed out that at this following specific embodiment only is used for that the invention will be further described, does not represent limiting the scope of the invention.Some nonessential modifications that other people make according to the present invention and adjustment still belong to protection scope of the present invention.Embodiment 1
60 parts of urethane resins, 3.5 parts of defoamer EFKA2028 (10%), 1.5 parts of flow agent EFKA3033 (10%), 20 parts of ammonia ester level dimethylbenzene and 5 parts of ammonia ester level N-BUTYL ACETATEs added successively stir in the mixing kettle.Its every performance sees Table 1:
Table 1
Remarks: 1. the test of every index is all undertaken by each clause in " GB/T 1981.2-2003 electric insulations are with coating with lacquer part 2: test method ".2. volume specific resistance, electrical strength: sample cures 25 ± 2 ℃ of conditions, tests behind the 24h.
Embodiment 2
After 80 parts of urethane resins, 4 parts of defoamer BYK-141 (10%), 3 parts of flow agent BYK-307,30 parts of ammonia ester level dimethylbenzene, 5 parts of ammonia ester level N-BUTYL ACETATEs and 30 parts of titanium dioxides are mixed, with shredder be ground to fineness qualified till.Its every performance sees Table 2:
Table 2
Remarks: 1. the test of 1-8 indexs is all undertaken by each clause in " GB/T 1981.2-2003 electric insulations are with coating with lacquer part 2: test method " in the table.The test of the 9th index is undertaken by " GB/T 1724-1979 coating fineness assay methods " in the table.2. volume specific resistance, electrical strength: sample cures 25 ± 2 ℃ of conditions, tests behind the 24h.
More than the urethane resin that uses of two embodiment obtains by following prepared: be warming up to 60～70 ℃ with 70～80 parts by Tetra hydro Phthalic anhydride, m-phthalic acid, Sai Ke, the stirring of TriMethylolPropane(TMP) synthetic polyester polyol adding reactor, slowly be added dropwise to 20～30 parts of tolylene diisocyanates in the still, in 60～70 ℃ of reactions 3～4 hours, add 50～70 parts of ammonia ester level dimethylbenzene, stir.
Claims (2)
1. self-curing polyurethane insulating varnish, its component and weight part proportioning are:
Urethane resin 40～100
Defoamer 3～5
Flow agent 1～3
Ammonia ester level dimethylbenzene 20～30
Ammonia ester level N-BUTYL ACETATE 5～10
Filler 0～50
In the said components, described urethane resin obtains by following prepared: add the reactor stirring with 70～80 parts by Tetra hydro Phthalic anhydride, m-phthalic acid, Sai Ke, TriMethylolPropane(TMP) synthetic polyester polyol and be warming up to 60～70 ℃, slowly be added dropwise to 20～30 parts of tolylene diisocyanates in the still, in 60～70 ℃ of reactions 3～4 hours, add 50～70 parts of ammonia ester level dimethylbenzene, stir.
2. the preparation method of the described self-curing polyurethane insulating varnish of claim 1, it is characterized in that 40～100 parts of urethane resins, 3～5 parts of defoamers, 1～3 part of flow agent, 20～30 parts of ammonia ester level dimethylbenzene, 5～10 parts of ammonia ester level N-BUTYL ACETATEs and 0～50 part of filler added in the mixing kettle successively and stir, it is promptly qualified to be ground to fineness with shredder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100274764A CN100513500C (en) | 2007-04-09 | 2007-04-09 | Self-curing polyurethane insulating varnish and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100274764A CN100513500C (en) | 2007-04-09 | 2007-04-09 | Self-curing polyurethane insulating varnish and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101029201A CN101029201A (en) | 2007-09-05 |
| CN100513500C true CN100513500C (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100274764A Expired - Fee Related CN100513500C (en) | 2007-04-09 | 2007-04-09 | Self-curing polyurethane insulating varnish and its production |
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| Country | Link |
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| CN (1) | CN100513500C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614061A (en) * | 2013-11-25 | 2014-03-05 | 江门市蓬江区巨匠涂料化工有限公司 | High-adhesion primer for gold/silver foil surfaces and preparation method thereof |
| CN104087142A (en) * | 2014-07-15 | 2014-10-08 | 王锶源 | Heat-resistant insulating paint |
| CN104200980B (en) * | 2014-08-20 | 2016-08-24 | 北京卫星制造厂 | A kind of assembling method of high-power planar transformer |
| CN105206394B (en) * | 2015-08-25 | 2017-09-29 | 莱芜钢铁集团有限公司 | A kind of dry-type transformer winding surface checking restorative procedure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1394926A (en) * | 2002-07-16 | 2003-02-05 | 南京大学 | H-grade low-temp. beading polyurethane paint wire-covering paint |
| CN1396934A (en) * | 2000-01-27 | 2003-02-12 | 拜尔公司 | Novel bonding agent combination for weathering resistance coatings that are produced by coil coating |
| CN1587293A (en) * | 2004-08-05 | 2005-03-02 | 复旦大学 | Process for preparing high solid single component polyurethane elastor and its use |
| CN1597815A (en) * | 2004-08-03 | 2005-03-23 | 中国化工建设总公司常州涂料化工研究院 | Paint for H grade polyurethane enamelled wire with good saline water needle performace capable of directing welding at low temp. |
-
2007
- 2007-04-09 CN CNB2007100274764A patent/CN100513500C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396934A (en) * | 2000-01-27 | 2003-02-12 | 拜尔公司 | Novel bonding agent combination for weathering resistance coatings that are produced by coil coating |
| CN1394926A (en) * | 2002-07-16 | 2003-02-05 | 南京大学 | H-grade low-temp. beading polyurethane paint wire-covering paint |
| CN1597815A (en) * | 2004-08-03 | 2005-03-23 | 中国化工建设总公司常州涂料化工研究院 | Paint for H grade polyurethane enamelled wire with good saline water needle performace capable of directing welding at low temp. |
| CN1587293A (en) * | 2004-08-05 | 2005-03-02 | 复旦大学 | Process for preparing high solid single component polyurethane elastor and its use |
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| Publication number | Publication date |
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| CN101029201A (en) | 2007-09-05 |
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Effective date of registration: 20151230 Address after: 510880, Huadu Town, Huadu District, Guangdong, Guangzhou Patentee after: GUANGZHOU BOTHLEADER ELECTRIC MATERIAL Co.,Ltd. Address before: 36, 102, building 23, Yunshan Avenue, Xinhua Town, Huadu District, Guangdong, Guangzhou 510800, China Patentee before: Zhou Shudong |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 |