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Halogen-free flame-retardant epoxy resin and preparation method thereof

A technology of epoxy resin and flame retardant, applied in the field of halogen-free flame retardant, can solve the problems of small contact area, insufficient mixing, inconvenient feeding, etc., achieve good crushing effect, sufficient mixing, and improve efficiency

Inactive Publication Date: 2020-10-30
安徽大松树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The existing mixing and stirring device for preparing halogen-free flame-retardant epoxy resin has the problems of insufficient stirring, the raw materials are not broken during stirring, and the contact area is small, resulting in insufficient mixing and inconvenient feeding, time-consuming and labor-intensive problems.

Method used

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  • Halogen-free flame-retardant epoxy resin and preparation method thereof
  • Halogen-free flame-retardant epoxy resin and preparation method thereof
  • Halogen-free flame-retardant epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A halogen-free flame-retardant epoxy resin, made of the following raw materials in parts by weight: 100 parts of bisphenol A epoxy resin, 5 parts of carboxyl-terminated nitrile rubber, 1 part of dicyandiamide and its derivatives, and cyclic benzene 10 parts of oxyphosphazene compound;

[0043] The halogen-free flame-retardant epoxy resin is made by the following steps:

[0044] The first step, mixing the raw materials, adding the raw materials into the mixing and stirring device, stirring and mixing for 5 minutes until uniformly mixed;

[0045] The second step, melt extrusion, put the mixed material obtained in the first step into the extruder to melt and extrude, and the melt kneading temperature is 70°C;

[0046] The third step, tablet forming, the molten material obtained in the second step is pressed through a tablet press, and the thickness is controlled at 1mm;

[0047] The fourth step is grinding and collecting, sending the material obtained in the third step i...

Embodiment 2

[0049] A halogen-free flame-retardant epoxy resin, characterized in that it is made of the following raw materials in parts by weight: 100 parts of bisphenol A epoxy resin, 25 parts of carboxyl-terminated nitrile rubber, 8 parts of dicyandiamide and its derivatives And 50 parts of cyclic phenoxyphosphazene compounds;

[0050] The halogen-free flame-retardant epoxy resin is made by the following steps:

[0051] The first step, mixing the raw materials, adding the raw materials into the mixing and stirring device, stirring and mixing for 5 minutes until uniformly mixed;

[0052] The second step, melt extrusion, put the mixed material obtained in the first step into the extruder to melt and extrude, and the melt kneading temperature is 80°C;

[0053] The third step, tablet forming, the molten material obtained in the second step is pressed through a tablet press, and the thickness is controlled at 3mm;

[0054] The fourth step is grinding and collecting, sending the material ob...

Embodiment 3

[0056] A halogen-free flame-retardant epoxy resin, characterized in that it is made of the following raw materials in parts by weight: 100 parts of bisphenol A epoxy resin, 40 parts of carboxyl-terminated nitrile rubber, 15 parts of dicyandiamide and its derivatives And 90 parts of cyclic phenoxyphosphazene compounds;

[0057] The halogen-free flame-retardant epoxy resin is made by the following steps:

[0058] The first step, mixing the raw materials, adding the raw materials into the mixing and stirring device, stirring and mixing for 5 minutes until uniformly mixed;

[0059] The second step, melt extrusion, put the mixed material obtained in the first step into the extruder to melt and extrude, and the melt kneading temperature is 90°C;

[0060] The third step, tablet forming, the molten material obtained in the second step is pressed through a tablet press, and the thickness is controlled at 4mm;

[0061] The fourth step is grinding and collecting, sending the material o...

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Abstract

The invention discloses halogen-free flame-retardant epoxy resin and a preparation method thereof. The halogen-free flame-retardant epoxy resin is prepared from the raw materials of, by weight, 100 parts of epoxy resin, 5-40 parts of toughening agent, 1-15 parts of curing agent and 10-90 parts of halogen-free flame retardant. The halogen-free flame-retardant epoxy resin is prepared through the following steps that firstly, the raw materials are mixed, specifically, the raw materials are added into a mixing stirring device, and stirring mixing is conducted for 1-5 minutes till mixing is uniform; secondly, melting extrusion is conducted, specifically, mixed materials obtained in the first step are added into an extruder for melting extrusion, and melting mixing temperature is 70-90 DEG C; thirdly, tablet-pressing forming is conducted, specifically, molten materials obtained in the second step are subjected to tablet pressing operation through a tablet press, and the thickness is controlled to 1-4 mm; and fourthly, powder grinding and collection are conducted, specifically, materials obtained in the third step are fed into a powder mill to be crushed and graded, and powder obtained after cyclone separation is screened to obtain the halogen-free flame-retardant epoxy resin. According to the halogen-free flame-retardant epoxy resin and the preparation method thereof, the mixing stirring device is more convenient and faster to operate, human and material resources are saved, and mixing is conducted more fully.

Description

technical field [0001] The invention relates to the field of halogen-free flame-retardant technology, in particular to a halogen-free flame-retardant epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resin has excellent adhesion, electrical properties, chemical resistance, heat resistance and dimensional stability, and is widely used in storage containers, adhesives in the electronic and electrical industries, printed copper clad laminates and packaging materials. However, epoxy resin is a polymer material that is flammable and difficult to extinguish after being ignited. Adding a flame retardant is currently a widely used method for producing epoxy resin. [0003] Flame retardant materials are materials that can achieve flame retardant effects after adding flame retardants. Flame retardants can be used to treat materials with flame retardant treatment, so as to avoid material burning and prevent fire from spreading, and make materials have sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/04B29B7/18B29B7/22B29B7/26B29B13/10B29C48/92B02C1/00C08L63/02C08L13/00C08K5/5399
CPCB02C1/00B29B7/18B29B7/22B29B7/26B29B9/04B29B13/10B29C48/92B29C2948/92704C08L63/00C08L2201/02C08L2201/22C08L13/00C08K5/5399
Inventor 朱立芳
Owner 安徽大松树脂有限公司
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