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Alkylphenol modified phenolic resin suitable for hot-melt preimpregnation process and preparation method of alkylphenol modified phenolic resin

A technology of phenolic resin and alkylphenol, which is applied in the field of alkylphenol modified phenolic resin and its preparation, can solve the problems of low quality stability, difficulty in balancing material ablation resistance and mechanical properties, etc., to improve mechanical properties, Reduced crosslink density and carbon residue rate, good film-forming effect

Active Publication Date: 2021-12-17
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Some studies in the existing preparation technology have proposed to use alkylphenols to modify thermosetting phenolic resins, but it is still difficult to balance the ablation resistance and mechanical properties of the material. It is necessary to sacrifice the ablative properties of the phenolic resin while improving the mechanical strength of the material.
Moreover, the existing phenolic resin molding process is mostly used in the wet prepreg process, and the quality stability is low

Method used

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  • Alkylphenol modified phenolic resin suitable for hot-melt preimpregnation process and preparation method of alkylphenol modified phenolic resin

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Embodiment 1

[0037] The alkylphenol-modified phenolic resin suitable for the hot-melt prepreg process described in this embodiment, its preparation raw materials are: phenol, aldehyde and alkaline catalyst;

[0038] Wherein, the phenol is composed of 8% tert-butylphenol by mass percentage, 90% phenol, and 2% bisphenol A; the aldehyde is formaldehyde; the basic catalyst is barium hydroxide;

[0039] The molar ratio of phenol to aldehyde is 1:1.3; the mass of basic catalyst accounts for 1.2% of the total mass of phenol.

[0040] The preparation method of the alkylphenol-modified phenolic resin suitable for the hot-melt prepreg process described in this embodiment comprises the following steps:

[0041] S1. According to the amount of raw materials selected above, add the above-mentioned mixed phenol into the reaction vessel, drop formaldehyde solution into the melted mixed phenol under stirring, heat and stir evenly, add catalyst barium hydroxide to it after cooling;

[0042] S2. The mixture...

Embodiment 2

[0045] The alkylphenol-modified phenolic resin suitable for the hot-melt prepreg process described in this embodiment, its preparation raw materials are: phenol, aldehyde and alkaline catalyst;

[0046] Wherein, phenol is composed of 13% tert-butylphenol, 20% bisphenol A, and 67% phenol by mass percentage; the aldehyde is formaldehyde; the basic catalyst is ammonia;

[0047] The molar ratio of phenol to aldehyde is 1:1.4; the mass of basic catalyst accounts for 1.2% of the total mass of phenol.

[0048] The preparation method of the alkylphenol-modified phenolic resin suitable for the hot-melt prepreg process described in this embodiment comprises the following steps:

[0049] S1. According to the amount of raw materials selected above, add the above-mentioned mixed phenol into the reaction vessel, drop formaldehyde solution into the melted mixed phenol under stirring, heat and stir evenly, add catalyst ammonia water to it after cooling;

[0050] S2. The mixture in step S1 is h...

Embodiment 3

[0053] The alkylphenol-modified phenolic resin suitable for the hot-melt prepreg process described in this embodiment, its preparation raw materials are: phenol, aldehyde and alkaline catalyst;

[0054] Wherein, phenol is composed of 13% tert-butylphenol and 87% phenol by mass percentage; aldehyde is paraformaldehyde; basic catalyst is triethylamine;

[0055] The molar ratio of phenol to aldehyde is 1:1.3; the mass of basic catalyst accounts for 1% of the total mass of phenol.

[0056] The preparation method of the alkylphenol-modified phenolic resin suitable for the hot-melt prepreg process described in this embodiment comprises the following steps:

[0057] S1. According to the amount of raw materials selected above, add the above-mentioned mixed phenol into the reaction vessel, put the paraformaldehyde solution into the melted mixed phenol under stirring, heat and stir evenly, and then add the catalyst triethylamine to it after cooling down ;

[0058] S2. The mixture in s...

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Abstract

The invention provides alkylphenol modified phenolic resin suitable for a hot-melt preimpregnation process and a preparation method of the alkylphenol modified phenolic resin. The alkylphenol modified phenolic resin comprises the preparation raw materials: phenol, aldehyde and a basic catalyst; the phenol is composed of alkylphenol and non-alkylphenol, and the mass of the alkylphenol accounts for 5%-18% of the total mass of the phenol; and the molar ratio of the phenol to the aldehyde is 1:(1.3-1.5). The alkylphenol modified phenolic resin has high strength and strong ablation resistance at the same time, and is suitable for a preparation process of a hot-melt prepreg with high quality stability.

Description

technical field [0001] The invention belongs to the technical field of modified phenolic resins, and in particular relates to an alkylphenol-modified phenolic resin suitable for a hot-melt prepreg process and a preparation method thereof. Background technique [0002] Phenolic resin has excellent heat resistance, ablation resistance, flame retardancy, etc., and is mostly used as a general-purpose matrix resin for heat-resistant and ablation-resistant materials. At present, the rapid development of aerospace and national defense cutting-edge technology puts forward higher requirements for the heat resistance and flexibility of the resin matrix: ablation-resistant materials should have a certain degree of flexibility. However, conventional phenolic resins are difficult to meet the requirements in terms of interlaminar shear strength, elongation at break and other properties. For example, the Chinese patent document CN104086728A discloses a method for preparing a modified phen...

Claims

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Application Information

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IPC IPC(8): C08G8/24
CPCC08G8/24
Inventor 刘晶姚亚琳陈敬菊田谋锋石佳豪
Owner 北京玻钢院复合材料有限公司
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