CN103819879A - Method for preparing low-viscosity high-performance epoxy casting resin - Google Patents
Method for preparing low-viscosity high-performance epoxy casting resin Download PDFInfo
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- CN103819879A CN103819879A CN201410040742.7A CN201410040742A CN103819879A CN 103819879 A CN103819879 A CN 103819879A CN 201410040742 A CN201410040742 A CN 201410040742A CN 103819879 A CN103819879 A CN 103819879A
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Abstract
The invention discloses a method for preparing a low-viscosity high-performance epoxy casting resin. The method is characterized in that epoxy resin and a curing agent are firstly subjected to modification treatments during the preparation of the epoxy casting resin; the epoxy resin is prepared through the blending modification of bisphenol A epoxy resin, bisphenol F epoxy resin and a polyalcohol toughening agent; the curing agent is prepared through the chemical toughening modification of methyl tetrahydrophthalic anhydride. The preparation method for the low-viscosity high-performance epoxy casting resin can remarkably improve the viscosity and performance of epoxy casing resin products, so as to widen the product application range.
Description
Technical field
The present invention relates to a kind of preparation method of low viscosity and high performance epoxy casting resin, belong to macromolecular material epoxy resin preparing technical field.
Background technology
The control of epoxy casting resin desired raw material, comprises that resin modified material and solidifying agent synthesize material modified, the particularly material modified aspect of solidifying agent.The difference of material plays conclusive effect for the performance of the product after synthetic.The control of temperature of reaction in building-up process, is mainly manifested in the deviation of the control of actual inside temperature and outside temperature control temperature, has directly affected product building-up reactions whether completely.
Summary of the invention
The technical issues that need to address of the present invention are just to overcome the defect of prior art, and a kind of preparation method of low viscosity and high performance epoxy casting resin is provided, and it can obviously improve viscosity and the performance of epoxy casting resin product, expand the range of application of product.
For addressing the above problem, the present invention adopts following technical scheme:
A preparation method for low viscosity and high performance epoxy casting resin, concrete steps are:
(1) described method, in epoxy casting resin preparation process, is first carried out modification to epoxy resin and solidifying agent; Described epoxy resin is by bisphenol A epoxide resin, bisphenol F epoxy resin and polyalcohols toughner is mixed and modified forms, and described solidifying agent is to be formed through chemical toughening modifying by methyl tetrahydro phthalic anhydride;
(2) resin after modification is toasted 3 hours at 60 ℃, vacuum sucks in Preblend A tank, adds subsequently mill base, mix, and heated and stirred 20 minutes, then add the silicon powder through metering, be heated to 60 ~ 80 ℃ of vacuum defoamations and stir 2-3 hour; By the solidifying agent after modification, 60 ℃ of bakings 3 hours, vacuum sucked in Preblend B tank, heated and stirred 20 minutes, then add silicon powder and the promotor through metering, heat 60 ~ 80 ℃ of vacuum stirring 2-3 hour;
(3) by the solidifying agent blowing in the resin in Preblend A tank and Preblend B tank, mix and blend, obtains low viscosity and high performance epoxy casting resin.
The concrete steps of described epoxy resin modification are: adopt bisphenol f type epoxy resin, the bisphenol A type epoxy resin of 20 ~ 60 weight parts and the polyalcohols toughner of 1 ~ 20 weight part of 30 ~ 70 weight parts, under 30 ~ 80 ℃ of conditions, stir 1 ~ 5 h, mix;
Described curing agent modified concrete steps are:
(1) take the tetrahydrophthalic anhydride of 10 ~ 20 weight parts and the alcohol compound of 1 ~ 10 weight part, tentatively mix;
(2) mixture is placed in to reaction vessel, being warming up to oil bath temperature is 100 ~ 130 ℃, after material melting, stirs, and maintains temperature of charge under 120 ~ 180 ℃ of conditions, reaction 1 ~ 4 h;
(3) add 5 ~ 20 parts of tetrahydrophthalic anhydride, after fusing, add 3 ~ 15 parts of methyl tetrahydro phthalic anhydrides, stir 20 ~ 50 min; Add the methyl tetrahydro phthalic anhydride of 30 ~ 100 weight parts, stir 1 ~ 3 h.
Compared with prior art, low viscosity and high performance epoxy casting resin of the present invention: (one) in use, can at room temperature keep the stability of 1 year, other domestic epoxy resin products are low relatively for its viscosity number, only have 2000 ~ 3000 mpa.s, normal temperature dielectric loss after products solidifying and high temperature Jie consumption are low, the smooth running that can keep transformer; (2) be solvent-free environment-protection material, because the viscosity of product own is low, perviousness is extremely strong, not only good for the effect of impregnation of transformer material inside, can be widely used in all kinds of electric equipment products.
Accompanying drawing explanation
Fig. 1 is preparation method's schematic diagram of a kind of low viscosity and high performance epoxy casting resin of the present invention.
Embodiment
Illustrate the present invention below in conjunction with embodiment.
Fig. 1 is preparation method's schematic diagram of a kind of low viscosity and high performance epoxy casting resin of the present invention, and concrete steps are:
(1) described method, in epoxy casting resin preparation process, is first carried out modification to epoxy resin and solidifying agent; Described epoxy resin is by bisphenol A epoxide resin, bisphenol F epoxy resin and polyalcohols toughner is mixed and modified forms, and described solidifying agent is to be formed through chemical toughening modifying by methyl tetrahydro phthalic anhydride;
(2) resin after modification is toasted 3 hours at 60 ℃, vacuum sucks in Preblend A tank, adds subsequently mill base, mix, and heated and stirred 20 minutes, then add the silicon powder through metering, be heated to 60 ~ 80 ℃ of vacuum defoamations and stir 2-3 hour; By the solidifying agent after modification, 60 ℃ of bakings 3 hours, vacuum sucked in Preblend B tank, heated and stirred 20 minutes, then add silicon powder and the promotor through metering, heat 60 ~ 80 ℃ of vacuum stirring 2-3 hour;
(3) by the solidifying agent blowing in the resin in Preblend A tank and Preblend B tank, mix and blend, obtains low viscosity and high performance epoxy casting resin.
The concrete steps of described epoxy resin modification are: adopt bisphenol f type epoxy resin, the bisphenol A type epoxy resin of 20 ~ 60 weight parts and the polyalcohols toughner of 1 ~ 20 weight part of 30 ~ 70 weight parts, under 30 ~ 80 ℃ of conditions, stir 1 ~ 5 h, mix;
Described curing agent modified concrete steps are:
(1) take the tetrahydrophthalic anhydride of 10 ~ 20 weight parts and the alcohol compound of 1 ~ 10 weight part, tentatively mix;
(2) mixture is placed in to reaction vessel, being warming up to oil bath temperature is 100 ~ 130 ℃, after material melting, stirs, and maintains temperature of charge under 120 ~ 180 ℃ of conditions, reaction 1 ~ 4 h;
(3) add 5 ~ 20 parts of tetrahydrophthalic anhydride, after fusing, add 3 ~ 15 parts of methyl tetrahydro phthalic anhydrides, stir 20 ~ 50 min; Add the methyl tetrahydro phthalic anhydride of 30 ~ 100 weight parts, stir 1 ~ 3 h.
The prepared resin viscosity of the present invention is at 2000 ~ 3000 mpa.s, and Tg value is greater than 80 ℃, and tensile strength is greater than 85 MPa, and its electrical strength is greater than 25 MV/m, and shock strength is greater than 10 kj/m
2.
Finally it should be noted that: obviously, above-described embodiment is only for example of the present invention is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being amplified out thus or variation are still among protection scope of the present invention.
Claims (3)
1. a preparation method for low viscosity and high performance epoxy casting resin, is characterized in that: concrete steps are:
(1) described method, in epoxy casting resin preparation process, is first carried out modification to epoxy resin and solidifying agent; Described epoxy resin is by bisphenol A epoxide resin, bisphenol F epoxy resin and polyalcohols toughner is mixed and modified forms, and described solidifying agent is to be formed through chemical toughening modifying by methyl tetrahydro phthalic anhydride;
(2) resin after modification is toasted 3 hours at 60 ℃, vacuum sucks in Preblend A tank, adds subsequently mill base, mix, and heated and stirred 20 minutes, then add the silicon powder through metering, be heated to 60 ~ 80 ℃ of vacuum defoamations and stir 2-3 hour; By the solidifying agent after modification, 60 ℃ of bakings 3 hours, vacuum sucked in Preblend B tank, heated and stirred 20 minutes, then add silicon powder and the promotor through metering, heat 60 ~ 80 ℃ of vacuum stirring 2-3 hour;
(3) by the solidifying agent blowing in the resin in Preblend A tank and Preblend B tank, mix and blend, obtains low viscosity and high performance epoxy casting resin.
2. the preparation method of a kind of low viscosity and high performance epoxy casting resin as claimed in claim 1, it is characterized in that: the concrete steps of described epoxy resin modification are: the bisphenol f type epoxy resin, the bisphenol A type epoxy resin of 20 ~ 60 weight parts and the polyalcohols toughner of 1 ~ 20 weight part that adopt 30 ~ 70 weight parts, under 30 ~ 80 ℃ of conditions, stir 1 ~ 5 h, mix.
3. the preparation method of a kind of low viscosity and high performance epoxy casting resin as claimed in claim 1, is characterized in that: described curing agent modified concrete steps are:
(1) take the tetrahydrophthalic anhydride of 10 ~ 20 weight parts and the alcohol compound of 1 ~ 10 weight part, tentatively mix;
(2) mixture is placed in to reaction vessel, being warming up to oil bath temperature is 100 ~ 130 ℃, after material melting, stirs, and maintains temperature of charge under 120 ~ 180 ℃ of conditions, reaction 1 ~ 4 h;
(3) add 5 ~ 20 parts of tetrahydrophthalic anhydride, after fusing, add 3 ~ 15 parts of methyl tetrahydro phthalic anhydrides, stir 20 ~ 50 min; Add the methyl tetrahydro phthalic anhydride of 30 ~ 100 weight parts, stir 1 ~ 3 h.
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| CN201410040742.7A CN103819879A (en) | 2014-01-28 | 2014-01-28 | Method for preparing low-viscosity high-performance epoxy casting resin |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262904A (en) * | 2014-09-11 | 2015-01-07 | 吴江固德电材系统股份有限公司 | Preparation method of halogen-free flame retardant epoxy casting agent for insulation of electrical apparatus |
| CN104772833A (en) * | 2015-04-14 | 2015-07-15 | 张金木 | Epoxy resin vacuum degassing control system |
| CN105001598A (en) * | 2015-08-21 | 2015-10-28 | 四川电器集团股份有限公司 | Instrument transformer casing |
| CN105331045A (en) * | 2015-11-03 | 2016-02-17 | 固德电材系统（苏州）股份有限公司 | Epoxy resin composition for solid-sealed polar pole and preparation method thereof |
| CN105563719A (en) * | 2014-10-16 | 2016-05-11 | 大连北方互感器集团有限公司 | Epoxy resin vacuum pouring technology for protection gas inflation |
| CN107298754A (en) * | 2017-06-26 | 2017-10-27 | 广州仑利奇合成树脂有限公司 | A kind of many condensing models of liquid, its preparation method and application |
| CN113201206A (en) * | 2021-06-21 | 2021-08-03 | 大连北方互感器集团有限公司 | Epoxy resin formula material suitable for vacuum pouring process and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262904A (en) * | 2014-09-11 | 2015-01-07 | 吴江固德电材系统股份有限公司 | Preparation method of halogen-free flame retardant epoxy casting agent for insulation of electrical apparatus |
| CN105563719A (en) * | 2014-10-16 | 2016-05-11 | 大连北方互感器集团有限公司 | Epoxy resin vacuum pouring technology for protection gas inflation |
| CN104772833A (en) * | 2015-04-14 | 2015-07-15 | 张金木 | Epoxy resin vacuum degassing control system |
| CN104772833B (en) * | 2015-04-14 | 2018-06-05 | 张金木 | A kind of epoxide resin vacuum degassing control method |
| CN105001598A (en) * | 2015-08-21 | 2015-10-28 | 四川电器集团股份有限公司 | Instrument transformer casing |
| CN105331045A (en) * | 2015-11-03 | 2016-02-17 | 固德电材系统（苏州）股份有限公司 | Epoxy resin composition for solid-sealed polar pole and preparation method thereof |
| CN105331045B (en) * | 2015-11-03 | 2019-03-22 | 固德电材系统（苏州）股份有限公司 | Pole composition epoxy resin and preparation method thereof |
| CN107298754A (en) * | 2017-06-26 | 2017-10-27 | 广州仑利奇合成树脂有限公司 | A kind of many condensing models of liquid, its preparation method and application |
| CN107298754B (en) * | 2017-06-26 | 2019-06-28 | 广州仑利奇合成树脂有限公司 | A kind of liquid poly acid anhydrides, preparation method and application |
| CN113201206A (en) * | 2021-06-21 | 2021-08-03 | 大连北方互感器集团有限公司 | Epoxy resin formula material suitable for vacuum pouring process and preparation method thereof |
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Application publication date: 20140528 |