Preparation of organic-inorganic hybrid curing agent with flame retardant property and application in prepared epoxy resin

An epoxy resin and curing agent technology, applied in the field of polymer materials and flame retardant materials, can solve the problems of high cost, damage to mechanical properties of materials, complicated processes, etc., and achieve good mechanical properties, good low smoke and flame retardant properties, The effect of expanding the application field

Active Publication Date: 2017-06-23
NORTHWEST NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the research on flame retardant epoxy resin mainly has two aspects. One is additive flame retardant, that is, adding flame retardant directly in the curing process of epoxy resin. The advantages are low cost and simple process, but the disadvantage is flame retardant Insufficient capacity, serious damage to the mechanical properties of the material; the other is intrinsic flame retardant, that is, the introduction of flame retardants at the molecular structure level of epoxy resin, which has the advantage of good flame retardant properties of materials and almost no impact on mechanical properties , and can even improve some mechanical properties, but the disadvantages are poor smoke suppression, complicated process and high cost

Method used

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  • Preparation of organic-inorganic hybrid curing agent with flame retardant property and application in prepared epoxy resin
  • Preparation of organic-inorganic hybrid curing agent with flame retardant property and application in prepared epoxy resin
  • Preparation of organic-inorganic hybrid curing agent with flame retardant property and application in prepared epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of organic-inorganic hybrid curing agent

[0037] Weigh 100 g of trimesic acid, dissolve in 500 mL of absolute ethanol, add 100 g of magnesium hydroxide, stir mechanically at 75°C for 6 hours, filter, wash with a large amount of ethanol, and dry in vacuo to obtain a white powdery solid, It is an organic-inorganic hybrid curing agent.

[0038] (2) Preparation of halogen-free low-smoke flame-retardant epoxy resin

[0039] Weigh 100 g of bisphenol A epoxy resin, 1 g of organic-inorganic hybrid curing agent, 5 g of palygorskite clay (particle size 200-500 mesh), 2 g of magnesium aluminum silicate, and 3 g of magnesium gluconate in a 1000 mL flask After mixing evenly, first cure at 60°C for 10 minutes, and then at 90°C for 1 hour to obtain a halogen-free low-smoke flame-retardant epoxy resin.

[0040] Properties of halogen-free low-smoke flame-retardant epoxy resin: oxygen index 35, smoke density 84, bending strength 35 MPa, impact strength 14 KJ / M 2 .

Embodiment 2

[0042] (1) Preparation of organic-inorganic hybrid curing agent

[0043] Weigh 100 g of trimesic acid, dissolve it in 2000 ml of absolute ethanol, add 500 g of magnesium hydroxide, stir mechanically at 50°C for 3 hours, filter, wash with a large amount of ethanol, and dry in vacuo to obtain a white powdery solid, It is an organic-inorganic hybrid curing agent.

[0044] (2) Preparation of halogen-free low-smoke flame-retardant epoxy resin

[0045] Weigh 100 g bisphenol A epoxy resin, 5 g organic-inorganic hybrid curing agent, 10 g palygorskite clay (particle size 200-500 mesh), 7 g magnesium aluminum silicate, 10 g magnesium gluconate, in 1000 ml After mixing evenly in the flask, first cure at 80°C for 30 minutes, and then at 110°C for 2 hours to obtain a halogen-free low-smoke flame-retardant epoxy resin.

[0046] Properties of halogen-free low-smoke flame-retardant epoxy resin: oxygen index 39, smoke density 75, bending strength 30 MPa, impact strength 11 KJ / M 2 .

Embodiment 3

[0048] (1) Preparation of organic-inorganic hybrid curing agent

[0049] Weigh 100 g of trimesic acid, dissolve in 2000 ml of absolute ethanol, add 400 g of magnesium hydroxide, stir mechanically at 70°C for 5 hours, filter, wash with a large amount of ethanol, and dry in vacuo to obtain a white powdery solid, It is an organic-inorganic hybrid curing agent.

[0050] (2) Preparation of halogen-free low-smoke flame-retardant epoxy resin

[0051] Weigh 100 g bisphenol A epoxy resin, 4 g organic-inorganic hybrid curing agent, 8 g palygorskite clay (particle size 200-500 mesh), 5 g magnesium aluminum silicate, 9 g magnesium gluconate, in 1000 ml In the flask, after mixing evenly, first cured at 70°C for 20 minutes, and then cured at 100°C for 2 hours to obtain a halogen-free low-smoke flame-retardant epoxy resin.

[0052] Properties of halogen-free low-smoke flame-retardant epoxy resin: oxygen index 37, smoke density 83, bending strength 31 MPa, impact strength 12.5 KJ / M 2 .

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Abstract

The invention discloses a preparation method of an organic-inorganic hybrid curing agent. The preparation method comprises the following steps: dissolving trimesic acid into absolute ethyl alcohol, adding magnesium hydrate, mechanically stirring for 3 to 6 h at the temperature of 50 to 75 DEG C, filtering, washing with ethyl alcohol, and carrying out vacuum drying to obtain a white powder-like solid. Epoxy resin is modified by using a combined method of flame retardant and intrinsic flame retarding, the purposes of inflaming retarding and smoke suppression are reached efficiently, and the production cost of the material is hardly increased. In terms of the thinking, the organic-inorganic hybrid curing agent with the flame retardant property is synthesized, and palygorskite clay, aluminum-magnesium silicate and magnesium gluconate are compounded, so that the prepared flame-retardant halogen-free low-smoke epoxy resin has good low-smoke and flame-retardant performances and also has good mechanical performance, and the application field of the epoxy resin is effectively expanded.

Description

technical field [0001] The invention relates to the preparation of an organic-inorganic hybrid curing agent, and also relates to the application of the organic-inorganic hybrid curing agent in the preparation of epoxy resin, belonging to the technical fields of flame retardant materials and polymer materials. Background technique [0002] The excellent physical, mechanical and electrical insulation properties of epoxy resin, the bonding performance with various materials, and the flexibility of its use process are not available in other thermosetting plastics. Therefore, it can be made into coatings, composite materials, casting materials, adhesives, molding materials and injection molding materials, and is widely used in various fields of the national economy. Among them, it is mainly used in electronic components, integrated circuits, LCD screens, optical discs, speakers, magnetic heads, iron cores, battery boxes, parabolic antennas and printed circuit boards. The applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/42C08K13/02C08K3/22C08K3/34C08K5/098
CPCC08G59/4223C08K3/22C08K3/34C08K3/346C08K5/098C08K13/02C08K2003/2224
Inventor 雷自强高承永王爱勤张哲王文波杨志旺
Owner NORTHWEST NORMAL UNIVERSITY
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