Production method for oxazolidinone epoxy glass cloth laminated board

A technology of oxazolidinone epoxy glass and oxazolidinone epoxy resin, which is applied in glass/slag layered products, lamination, lamination devices, etc. It can improve the electrical properties, low dielectric loss, and good mechanical and electrical properties.

Inactive Publication Date: 2008-08-20
CHINESE ELECTRICAL EQUIP GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the system of epoxy and maleic anhydride has the problem that performance and process cannot be balanced. If low molecular weight epoxy resin is used, the mixed system will be in a non-solid state, which cannot meet the gluing and pressing process. Even if the pro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of manufacture method of oxazolidinone epoxy glass cloth laminated board, make through the following steps:

[0015] a Preparation of oxazolidinone epoxy resin: Mix low molecular weight bisphenol A epoxy resin and diisocyanate in a mass ratio of 100:15~35, stir and heat to 150°C~160°C, react for 10~16 hours, and the color changes It is dark wine red, that is to form oxazolidinone epoxy resin, cool down, add organic solvent to dilute and set aside;

[0016] b Preparation of glass cloth pre-impregnated glue: In the oxazolidinone epoxy resin glue in step a, add a curing agent whose mass is 15-25% of the resin solids, and at the same time add 0.1-1% of the resin solids Accelerator 2-ethyl-4-methylimidazole, adding a thermal decomposition type free radical initiator according to 3-15% of the mass of the curing agent, and finally using acetone to adjust the viscosity of the glue to meet the dipping process;

[0017] c dipping, baking, and pressing to obtain an oxazoli...

Embodiment 2

[0020] 1. Synthesis of oxazolidinone epoxy resin:

[0021] Adopt the CYD128 type bisphenol A epoxy resin produced by Yueyang Petrochemical Epoxy Resin Factory, the epoxy value is 0.51~0.54:1000 parts by mass; 4,4'-diisocyanate diphenylmethane: 300 parts by mass

[0022] Add the above two raw materials into the reaction bottle, stir at a speed of 60-300r / min, and when the temperature rises to 150-160°C, react at this temperature for 12 hours to obtain the oxazolidinone epoxy resin. After properly cooling down, add an appropriate amount of toluene to dissolve, then add an appropriate amount of acetone to dilute to the required viscosity, and set aside.

[0023] 2. Glue formula:

[0024] The total amount of the above oxazolidinone epoxy resin

[0025] Maleic anhydride: 250 parts by mass

[0026] 2-Ethyl-4-methylimidazole: 5-8 parts by mass

[0027] DCP: 20 parts by mass

[0028] Acetone: appropriate amount to adjust viscosity

[0029] 3. Dipping, baking and pressing process...

Embodiment 3

[0042] 1. Oxazolidinone epoxy resin synthesis ratio:

[0043] The CYD128 type bisphenol A epoxy resin produced by Yueyang Petrochemical Epoxy Resin Factory is adopted, and the epoxy value is 0.51~0.54:1000 mass parts

[0044]TDI-80 / 20: 225 parts by mass

[0045] Add the above two raw materials into the reaction bottle, stir at a speed of 60-300r / min, raise the temperature gradually to 150°C-160°C, and react at this temperature for 15 hours to obtain the oxazolidinone epoxy resin. After properly cooling down, add an appropriate amount of toluene to dissolve, then add an appropriate amount of acetone to dilute to a certain viscosity, and set aside.

[0046] 2. Glue formula:

[0047] The total amount of the above oxazolidinone epoxy resin

[0048] Maleic anhydride: 260 parts by mass

[0049] 2-Ethyl-4-methylimidazole: 5 to 8 parts

[0050] DCP: 25 copies

[0051] Acetone: appropriate amount to adjust viscosity

[0052] 3. Dipping, baking and pressing process:

[0053] Sam...

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Abstract

The invention discloses a manufacturing method for an oxazolidone epoxy glass cloth laminated board, belonging to the technical field of the manufacturing methods of glass cloth laminated boards, which comprises the following steps: a, preparing oxazolidone epoxy resin: mixing low molecular weight bisphenol A epoxy resin with diisocyanate according to the mass ratio of 100 to 15 - 35, agitating and heating the mixture to 150 to 160 DEG C, then conducting cooling when the mixture takes on the color of wine red after reaction, and adding organic solvent to dilute the mixture for later use; b, preparing glass cloth presoaking glue liquefaction: in the oxazolidone epoxy resin glue solution prepared in step a, adding curing agent accounting for 15 to 25 % of the total resin solids, meanwhile adding accelerator 2-ethyl-4-methylimidazole according to 0.1 to 1% of the total resin solids, then adding thermal decomposition radical initiator according to the 3 to 15% of the mass of the curing agent, finally adjusting the viscosity of the glue solution by use of acetone to meet the demands of gum dipping process; c, dipping, baking, and pressing, so as to obtain the finished product of the oxazolidone epoxy glass cloth laminated board. The product produced according to the manufacturing method in the invention has the advantages of excellent heat resistance and electric insulation performance.

Description

technical field [0001] The invention relates to a method for manufacturing a heat-resistant laminated insulating material, in particular to the synthesis of oxazolidinone epoxy resin and the application of the formula composed of an oxazolidone epoxy resin and an acid anhydride curing agent in the manufacture of laminated boards. Background technique [0002] For a long time, 3240 epoxy phenolic glass cloth laminates have been used in F-class laminates in my country's electrical insulation materials, but the mechanical strength of 3240 boards is only 15% to 20% of normal at a thermal state of 155°C, which limits the use of large motors. , special motors, and the use of transformers in the industry, this contradiction has become particularly prominent in recent years. Although epoxy resin-based laminated insulating materials have good comprehensive mechanical and electrical properties, ordinary bisphenol A epoxy resin-based materials have limited heat resistance, and most of t...

Claims

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Application Information

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IPC IPC(8): B32B37/06B32B37/10B32B38/08B32B17/04C08G59/14C09J163/00
Inventor 朱祝文
Owner CHINESE ELECTRICAL EQUIP GRP CO LTD
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