Nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for mould pressing and preparation method thereof

A technology for reinforcing composite materials and nano-calcium carbonate, which is applied in the field of phenolic resin composite materials, can solve the problems of affecting the shape of products in the processing and molding process, low adhesion and mechanical properties, and does not conform to green environmental protection, and achieves high demoulding efficiency. The effect of fast drying and reduced water absorption

Active Publication Date: 2022-02-08
SHANDONG NORTH MODERN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, phenolic resin molding compounds generally have problems such as poor molding process, high water absorption, and slow curing speed.
In addition, the existing phenolic resin material itself also has some problems, such as high brittleness, low adhesion and mechanical properties, poor aging resistance, large content of free phenol and formaldehyde, etc.; The content is about 15%, and the formaldehyde content is about 1.0%, which does not meet the requirements of green environmental protection
[0004] In addition, during the synthesis process of phenolic resin, it was found that the degree of reaction between phenol and formaldehyde is severe, and implosion is prone to occur. Special personnel are required to monitor and control the degree of reaction and the performance of the product in real time. In addition, the existing polyethylene In the subsequent drying process of alcohol acetal modified phenolic resin, the solvent loss is serious, the volatile content is too low, and the material becomes hay state due to over-drying, which affects the subsequent processing and molding process and the final shape of the product

Method used

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  • Nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for mould pressing and preparation method thereof
  • Nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for mould pressing and preparation method thereof
  • Nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for mould pressing and preparation method thereof

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preparation example Construction

[0064] The present invention also includes a preparation method of nano-calcium carbonate modified thermosetting phenolic resin reinforced composite material for molding, comprising the following steps:

[0065] (1) Mix 40-50 parts of polyvinyl acetal-modified thermosetting phenolic resin, 0.5-1.5 parts of the first silane coupling agent, mix evenly, add 0.5-1 part of dispersant, 4-6 parts of active nano-calcium carbonate, 5-7 parts of silica powder, uniformly dispersed with a high-speed disperser to obtain the first mixture;

[0066] The first silane coupling agent is KH550 or KH560;

[0067] The dispersant is EFKA-4010 dispersant or EFKA-4015 dispersant;

[0068] The polyvinyl acetal modified thermosetting phenolic resin is prepared according to the following steps:

[0069] ①Put phenol into the reaction kettle, add n-butanol and stir to raise the temperature to 60°C, stir and react for 15-20 minutes, add light magnesium oxide to it, react at 65-70°C for 10-20 minutes, add...

Embodiment 1

[0083] A nano-calcium carbonate modified thermosetting phenolic resin reinforced composite material for molding, consisting of the following raw materials: polyvinyl acetal modified thermosetting phenolic resin 40kg, glass fiber 45kg, active nano-calcium carbonate 4kg, EFKA-4010 dispersant 0.5kg , zinc stearate 1kg, silane coupling agent KH560 0.5kg, ethanol 5kg and silicon micropowder 5kg;

[0084] The polyvinyl acetal modified thermosetting phenolic resin is prepared according to the following steps:

[0085] ①Put 40kg of phenol into the reaction kettle, add 1.2kg of n-butanol and stir to raise the temperature to 60°C, stir and react for 15 minutes, add 1.2kg of light magnesium oxide to it, react at 65°C for 10 minutes, then add 0.8kg of aniline in turn , 12kg formaldehyde solution, 24kg paraformaldehyde and 0.8kg butyraldehyde, reacted at 90 DEG C for 30 minutes, and now the viscosity was 4 cups of 50 DEG, 62 seconds, stopped the reaction, cooled to room temperature, and ob...

Embodiment 2

[0092]A kind of nano-calcium carbonate modified thermosetting phenolic resin reinforced composite material for molding, consisting of the following raw materials: polyvinyl acetal modified thermosetting phenolic resin 50kg, glass fiber 55kg, active nano-calcium carbonate 6kg, EFKA-4015 dispersant 1kg, Zinc stearate 5kg, silane coupling agent KH5501.5kg, ethanol 10kg and silicon micropowder 7kg;

[0093] The polyvinyl acetal modified thermosetting phenolic resin is prepared according to the following steps:

[0094] ①Put 45kg of phenol into the reaction kettle, add 1.35kg of n-butanol and stir to raise the temperature to 60°C, stir and react for 20 minutes, add 5.4kg of light magnesium oxide to it, react at 70°C for 20 minutes, and then add 3.6kg of aniline , 15kg formaldehyde solution, 30kg paraformaldehyde and 3.6kg butyraldehyde, reacted at 100°C for 60 minutes, at this moment, the viscosity was 4 cups of 50°, 65 seconds, stopped the reaction, cooled to room temperature, and...

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Abstract

The invention discloses a nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for mould pressing and a preparation method thereof. The nano calcium carbonate modified thermosetting phenolic resin reinforced composite material is prepared from the following raw materials: polyvinyl acetal modified thermosetting phenolic resin, glass fibers, active nano calcium carbonate, a dispersing agent, zinc stearate, a silane coupling agent, ethanol and silica powder. The nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for mold pressing can be formed by using a pressure injection process and a mold pressing process, the forming manufacturability is good, the surface of the formed part has glossiness, the demolding efficiency is high, the strength of the formed part is high, the water absorption rate of the composite material is reduced, and the service time of the formed part can be prolonged; the nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for mould pressing is high in drying speed, can effectively improve the production efficiency and reduce the energy consumption, can improve the curing speed by more than 60%, greatly reduces the curing time, improves the production efficiency, and is good in thermal stability.

Description

technical field [0001] The invention relates to the technical field of phenolic resin composite materials, in particular to a nano calcium carbonate modified thermosetting phenolic resin reinforced composite material for molding and a preparation method thereof. Background technique [0002] Phenolic resin, because of its high mechanical strength, good heat resistance, flame retardant, low toxicity, and low smoke emission, can be blended with other polymers to achieve diversification, and is widely used in national defense and military industry, industry, agriculture, and construction , transportation and other departments. [0003] The product with a large amount of phenolic resin is phenolic molding compound. As the earliest developed phenolic product, it has now given new content. It is not only used to manufacture electrical insulation devices, but also used to manufacture automobiles, aircraft parts or products, etc. However, phenolic resin molding compounds generally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/34C08L29/14C08K9/06C08K3/26C08K7/14C08K3/36C08J5/04
CPCC08J5/043C08J5/005C08K2201/011C08K2003/265C08J2361/34C08J2429/14C08K9/06C08K7/14C08K3/36
Inventor 袁森王桂伦胡学朝胡恂业赵富国赵平王见朋王桂芳
Owner SHANDONG NORTH MODERN CHEM IND
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