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Preparation method of novel bifunctional epoxy resin reactive diluent

A technology of group epoxy resin and reactive diluent, which is applied in the field of preparation of new bifunctional epoxy resin reactive diluent, can solve the problems of reducing the viscosity of epoxy resin, using restrictions, and reducing the strength of epoxy resin, so as to improve the strength With toughness, good workability, and the effect of reducing viscosity

Inactive Publication Date: 2018-08-14
HUBEI GREENHOME MATERIALS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the viscosity of epoxy resin, solvents such as terpene, petroleum, coal coke and alcohol ketone ether can be added to epoxy resin, such as turpentine, rosin, xylene, n-butanol, etc. These solvents may During the curing process of the resin, part of the residue forms pores, which affects the performance of the cured product, and as people pay more and more attention to their own safety and environmental protection, the use of these solvents will gradually be restricted
[0004] Glycidyl ether epoxy resin reactive diluents can also effectively reduce the viscosity of epoxy resins, among which butyl glycidyl ether and benzyl glycidyl ether monofunctional epoxy resin reactive diluents have the best dilution effect, but they will Reduce the molecular weight of the epoxy resin system, so that the strength of the epoxy resin after curing is reduced
Compared with other reactive diluents, trimethylolpropane glycidyl ether reactive diluents for trifunctional epoxy resins have a higher viscosity, and their diluting effect on epoxy resins is relatively poor; moreover, this type of reactive diluents for epoxy resins will Improve the cross-linking density of epoxy resin system, so that the epoxy resin will fail due to cracks due to stress or temperature changes during curing or application
The raw materials used in other types of bifunctional epoxy resin reactive diluents have higher melting points, such as the melting point of 1,4-butanediol at 20.2°C, the melting point of 1,6-hexanediol at 43°C, and the melting point of neopentyl glycol at 124°C. ℃, it is solid at low temperature, the use and operation of raw materials are inconvenient, and the epoxy resin reactive diluent obtained from it may also have the problem of solidification, which increases the difficulty of preservation and use of finished products

Method used

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  • Preparation method of novel bifunctional epoxy resin reactive diluent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) Add 118g of 3-methyl-1,5-pentanediol and 500g of toluene into a 1000mL three-necked flask equipped with a thermometer and a stirrer, and then add 0.8g of aluminum trichloride, niobium pentachloride, and trifluoromethanesulfonate Composite ring-opening catalyst, wherein the ratio of aluminum trichloride, niobium pentachloride and trifluoromethanesulfonate is 2:1:1, 195g of glycidyl alcohol is added dropwise under stirring, and then reacted at 50°C for 3h , the product is filtered, washed and dried to obtain the ring-opening etherification product of the epoxy compound.

[0027] b) In the above-mentioned ring-opening etherification product, add 0.5g benzyltriethylammonium chloride, tetrabutylammonium bromide composite ring-closing catalyst, wherein benzyltriethylammonium chloride, tetrabutylammonium bromide The ratio is 3:1, then add 180g of 50% potassium hydroxide solution by volume, stir and react at 85°C for 3h, then add 60g of ammonia water, stir and react at 53°C ...

Embodiment 2

[0030] a) Add 130g of 3-methyl-1,5-pentanediol and 500g of cyclopentane into a 1000mL three-necked flask equipped with a thermometer and a stirrer, and then add 2g of aluminum trichloride, niobium pentachloride, and trifluoromethanesulfonic acid A compound ring-opening catalyst of salt, wherein the ratio of aluminum trichloride, niobium pentachloride, and trifluoromethanesulfonate is 2:1:1, and 315g of glycidyl alcohol is added dropwise under stirring, and then reacted at 75°C After 3 hours, the product was filtered, washed and dried to obtain the ring-opening etherification product of the epoxy compound.

[0031] b) In the above-mentioned ring-opening etherification product, add 0.6g benzyltriethylammonium chloride, tetrabutylammonium bromide composite ring-closing catalyst, wherein benzyltriethylammonium chloride, tetrabutylammonium bromide The ratio is 3:1, then add 110g of potassium hydroxide solution with a volume concentration of 50%, stir and react at 75°C for 5h, then ...

Embodiment 3

[0034]a) Add 118g of 3-methyl-1,5-pentanediol and 500g of xylene into a 1000mL three-necked flask equipped with a thermometer and a stirrer, and then add 1.5g of aluminum trichloride, niobium pentachloride and trifluoromethanesulfonate respectively A mixed ring-opening catalyst of acid salt, wherein the ratio of aluminum trichloride, niobium pentachloride and trifluoromethanesulfonate is 2:1:1, 230g glycidol is added dropwise under stirring, and then at 70°C After reacting for 3 hours, the product was filtered, washed and dried to obtain the ring-opening etherification product of the epoxy compound.

[0035] b) In the above-mentioned ring-opening etherification product, add 1g benzyltriethylammonium chloride, tetrabutylammonium bromide composite ring-closing catalyst, wherein the ratio of benzyltriethylammonium chloride, tetrabutylammonium bromide 3:1, then add 200g of potassium hydroxide solution with a volume concentration of 50%, stir and react at 100°C for 5h, then add 50g...

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Abstract

A raw material 3-methyl-1,5-pentanediol in a preparation method is the isomer of 1,6-hexanediol, and a novel bifunctional epoxy resin reactive diluent is prepared through a same operating technology under existing device conditions; the raw material is a low-viscosity liquid at normal temperature, so the raw material has excellent operability; the purity of the raw material is high, so the novel bifunctional epoxy resin reactive diluent has a stable quality; and additionally, the melting point of the raw material is very low (-60 DEG C), so the novel bifunctional epoxy resin reactive diluent has a low melting point, and does not crystallize during storage and use.

Description

technical field [0001] The invention relates to an epoxy resin reactive diluent, in particular to a preparation method of a novel difunctional epoxy resin reactive diluent. Background technique [0002] The curing process of epoxy resin has the characteristics of good molding process and small curing shrinkage rate. The polymer formed by curing has good acid and alkali corrosion resistance, solvent resistance, excellent bonding performance and excellent electrical insulation performance. However, the high viscosity of epoxy resin limits its application in some aspects. For example, in the process of coating construction, the viscosity of the coating should not be too small to cause sagging, nor should it be so high that it needs to be heated during use. Or there is a problem of leveling; similarly, in pouring, gluing, etc., it is also hoped that the epoxy resin has a more suitable viscosity so that it can quickly and completely fill the mold or crack. In addition, the cured...

Claims

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Application Information

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IPC IPC(8): C07D301/02C07D303/30C08G59/22
CPCC07D301/02C07D303/30C08G59/22
Inventor 向磊安杰肖华青
Owner HUBEI GREENHOME MATERIALS TECH INC