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Novel aliphatic hyperbranched epoxy resin

An epoxy resin and aliphatic technology, which is applied in the field of new aliphatic hyperbranched epoxy resin, can solve the problems such as the decrease of the strength of the cured product

Inactive Publication Date: 2012-07-04
徐孝华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

, aliphatic hyperbranched polymers and hyperbranched epoxy resins can greatly improve the toughness of epoxy resins, but the strength of cured products decreases slightly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0004] 1. Main raw materials

[0005] Tris 2 (22 hydroxyethyl) 2 isocyanurate (THEIC) and dimethylol propionic acid (DMPA), both products of LG Chemicals; epichlorohydrin (ECH), diethylenetriamine (DETA) and Acrylonitrile (AN), chemically pure reagent, bisphenol A epoxy resin E251 (DGEBA).

[0006] 2. Synthesis of hyperbranched epoxy resin HTPE23

[0007] Utilize a one-step method to synthesize terminal hydroxyl hyperbranched polyester, and then react with epichlorohydrin through ring opening and ring closing to obtain a yield of about 80%, and an epoxy value of 0.309mol / 100g (the maximum theoretical value is 0.594mol / 100g , The ring-closing rate is about 52%) hyperbranched epoxy resin HTPE23.

[0008] 3. Preparation of Hybrid Resin

[0009] The curing agent DETA2AN was prepared by reacting equimolar DETA and AN. Mix the theoretical amount of DETA2AN, DGEBA and HTPE23, stir evenly, put it in a vacuum glass bottle at room temperature to remove air bubbles, pour it into a se...

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PUM

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Abstract

The invention provides a novel aliphatic hyperbranched epoxy resin. The novel aliphatic hyperbranched epoxy resin HTPE-3 is synthetized by adopting one-step synthesis, and the structure of HTPE-3 is characterized by Fourier transform infrared spectroscopy (FT-IR). The mechanical property and thermal property of hybrid resin of bisphenol A (BPA) epoxy resin E-51 and HTPE-3 are studied, and the result shows that the tenacity and strength of hybrid resin decreases after increasing as the content of HTPE-3 increases, and has a maximal value. Compared with pure E-51 resin, when the mass fraction of HTPE-3 is 12%, the impact strength and fracture toughness respectively increase by 169.8% and 35.2%, the tensile strength and bending strength respectively increase by 6.5% and 10.0%, and the Vicat softening temperature, the glass transition temperature and the thermal decomposition temperature descend slightly.

Description

technical field [0001] The invention relates to an epoxy resin, in particular to a novel aliphatic hyperbranched epoxy resin. Background technique [0002] At present, epoxy resin has the advantages of good mechanical and electrical properties, low shrinkage, easy processing and low price, and is widely used in adhesives, coatings, and advanced composite materials. However, due to the high cross-linking density and the structural characteristics of the benzene ring skeleton after curing, the impact resistance is poor and the toughness is insufficient. The toughening research of epoxy resin is a hot topic to broaden its application field. The main toughening methods include core-shell polymer toughening, IPN toughening, thermotropic liquid crystal polymer toughening, rubber-like elastomer toughening and nanometer toughening. Particle toughening, etc. These toughening methods can greatly improve the toughness of the resin, but often cause a significant decrease in tensile st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/04C08G63/685C08L63/02C08L63/00
Inventor 徐孝华
Owner 徐孝华