Preparation method of quatenary core end epoxy hyperbranched polyester

A technology of hyperbranched polyester and terminal hydroxyl hyperbranching, applied in the field of composite materials, can solve the problems of single structure of hyperbranched polyester, complex synthesis process, poor compatibility of epoxy resin, etc., and achieve important promotion and application value , The synthesis process is simple, and the effect of accelerating the curing speed

Active Publication Date: 2015-01-14
HARBIN FRP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems that the existing hyperbranched polyester has a single structure, poor compatibility with epoxy resin and complex synthesis process when the existing hyperbranched polyester is used as a toughening agent for the epoxy resin matrix, and provides a Quaternary core-end epoxy hyperbranched polyester and preparation method thereof

Method used

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  • Preparation method of quatenary core end epoxy hyperbranched polyester
  • Preparation method of quatenary core end epoxy hyperbranched polyester
  • Preparation method of quatenary core end epoxy hyperbranched polyester

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specific Embodiment approach 1

[0017] Specific embodiment one: a kind of quaternary core terminal epoxy hyperbranched polyester of the present embodiment, its structural formula is:

[0018]

[0019] where the R 2 for

[0020]

[0021] AB as stated in 2 for Wherein said n is a positive integer.

[0022] The quaternary core-end epoxy hyperbranched polyester described in this embodiment is centered on a quaternary core polyol, AB 2 The group is a three-dimensional network structure formed by repeating units.

[0023] The spherical three-dimensional structure of the four-membered core-terminated epoxy hyperbranched polyester described in this embodiment can reduce the shrinkage rate of the epoxy cured product.

[0024] The active end groups of the four-membered core-terminated epoxy hyperbranched polyester described in this embodiment can directly participate in the curing reaction to form a three-dimensional network structure, and the numerous terminal functional groups can accelerate the curi...

specific Embodiment approach 2

[0026] Specific embodiment two: the preparation method of a kind of quaternary core terminal epoxy group hyperbranched polyester of the present embodiment is specifically completed according to the following steps:

[0027]1. Mixing and stirring: Put the quaternary core polyol and the repeating unit in the flask according to the substance ratio of 1:(1~15), at a temperature of 100°C~240°C, and a stirring speed of 500 rpm~ Stir under the condition of 1500 rpm until completely dissolved to obtain the dissolved mixture; 2. Prepare the crude product of hydroxyl-terminated hyperbranched polyester: add the esterification reaction catalyst to the dissolved mixture obtained in step 1, and the esterification reaction The mass ratio of the catalyst to the dissolved mixture obtained in step 1 is (0.2-3):100, and the temperature is 60°C-200°C and the stirring speed is 500 rpm-1500 rpm. 2h~10h, during the reaction process, vacuum every 30min~1h for 2min~30min, the vacuum degree is -0.095MP...

specific Embodiment approach 3

[0032] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the quaternary core polyol described in step one is pentaerythritol, diglycerol, 1,2,4,5-benzenetetraphenol , 1,2,3,5-benzenetetraphenol or ditrimethylolpropane; the repeating unit described in step 1 is dimethylol propionic acid, dimethylol butyric acid, 3,5-dihydroxybenzene Formic acid, 5-hydroxyisophthalic acid, acetylated derivatives of dimethylolpropionic acid, acetylated derivatives of dimethylolbutyric acid, acetylated derivatives of 3,5-dihydroxybenzoic acid, 5- Acetylated derivatives of hydroxyisophthalic acid, silylated derivatives of dimethylolpropionic acid, silylated derivatives of dimethylolbutyric acid, silylated derivatives of 3,5-dihydroxybenzoic acid, 5 - silylated derivatives of hydroxyisophthalic acid or 4,4-bis(4-hydroxyphenyl)pentanoic acid. Others are the same as in the second embodiment.

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Abstract

The invention provides a quatenary core end epoxy hyperbranched polyester and a preparation method thereof, relates to the technical field of composite materials and in particular relates to a toughening agent for fiber composite material matrix resin and a preparation method for the toughening agent. According to the invention, the problems that the hyperbranched polyester serving as the toughening agent of the epoxy resin matrix has single structure, low compatibility with epoxy resin, a complex synthesis process and the like are solved. The structural formula of the quatenary core end epoxy hyperbranched polyester is shown as the specifications. The preparation method comprises the following steps: I, mixing and stirring; II, preparing a hydroxyl-terminated hyperbranched polyester crude product; III, preparing hydroxyl-terminated hyperbranched polyester; IV, preparing an epoxidation solution; V, preparing alkaline liquid; VI, preparing a neutralization solution; and VII, washing and drying to obtain the quatenary core end epoxy hyperbranched polyester. The method is mainly used for preparing the quatenary core end epoxy hyperbranched polyester.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a toughening agent for matrix resin of fiber composite materials and a preparation method thereof. Background technique [0002] Hyperbranched polyester (HBPE) has a series of unique physical and chemical properties due to the combination of the advantages of hyperbranched polymers and polyesters, such as good solubility, low melt or solution viscosity, multi-functionality, and not easy to crystallize , and excellent chemical resistance, aging resistance and other properties have been widely concerned and researched, HBPE is mainly divided into aromatic and aliphatic. [0003] The research on aromatic HBPE began in 1991. Because its hyperbranched skeleton contains a large number of rigid groups (benzene rings), making molecular movement relatively difficult, it has a high glass transition temperature (Tg), is solid at room temperature, and is not easily soluble in wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C08L67/04C08L63/00
Inventor 商伟辉张淑萍高赫陈辉马俊龙
Owner HARBIN FRP INST
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