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Preparation method of resorcinol resin

A technology of resorcinol and resin, applied in the field of preparation of resorcinol resin, can solve the problems of environmental builder injury, increase production cost, corrode molds, etc., and achieve the advantages of accelerating curing speed, avoiding corrosion and guaranteeing storage period. Effect

Active Publication Date: 2015-01-14
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, synthetic resins are usually cured by phenolic resin and acidic curing agent. The acidic curing agent used will corrode the mold, thereby increasing the production cost; and the acid will volatilize during the curing process of the synthetic resin, which is harmful to the environment and the builders. It will also cause great harm. Therefore, it is of great significance to provide an environmentally friendly curing agent for the production of FRP.

Method used

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  • Preparation method of resorcinol resin
  • Preparation method of resorcinol resin

Examples

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preparation example Construction

[0016] The embodiment of the present invention discloses a kind of preparation method of resorcinol resin, comprises the following steps:

[0017] Mix resorcinol, aldehyde compounds and basic compounds to obtain mixed products after reaction;

[0018] The pH of the mixed product is adjusted by using an alkaline filler and then distilled under reduced pressure to obtain a resorcinol resin.

[0019] The invention provides a preparation method of resorcinol resin. Firstly, resorcinol and aldehyde compounds are reacted with a basic compound, and then the obtained product is adjusted to pH through a basic filler and distilled under reduced pressure to obtain Resorcinol resin. The resorcinol resin prepared by the present invention does not contain acidic substances, thereby avoiding the corrosion of the mould, and at the same time, in the process of curing with the phenolic resin, there will be no volatilization of acidic substances, so the resorcinol resin prepared by the present ...

Embodiment 1

[0025] Add 100kg of resorcinol, 80kg of formaldehyde, and 0.3kg of calcium hydroxide to the reaction kettle in sequence, raise the temperature to 40°C, and react at a constant temperature for 6 hours to obtain a reaction compound, wherein the concentration of formaldehyde is 36wt%; Add 1 kg of sodium hydroxide and 1 kg of calcium oxide, distill under reduced pressure, control the temperature of the reduced-pressure distillation to be 38°C~40°C, and the degree of vacuum to be -0.98MPa~-0.94MPa, and distill under reduced pressure until the viscosity is 1500cp / 25°C to obtain Resorcinol resin. The resin prepared in this example had a solid content of 61% and a moisture content of 26%.

[0026] Add the resorcinol resin curing agent prepared in this example to the phenolic resin, wherein the mass ratio of the phenolic resin to the resorcinol resin is 100:5. Experimental results show that the curing time of the phenolic resin at 160°C is 40 seconds.

Embodiment 2

[0028] Add 100kg of resorcinol, 200kg of formaldehyde, and 1.1kg of sodium hydroxide to the reaction kettle in turn, raise the temperature to 80°C, and react at a constant temperature for 3 hours to obtain a reaction compound, wherein the concentration of formaldehyde is 36wt%; add the resulting reaction mixture to 1kg of sodium hydroxide and 1kg of magnesium oxide were distilled under reduced pressure, the temperature of the reduced-pressure distillation was controlled at 43~45°C, the degree of vacuum was -0.98MPa~-0.94MPa, and the viscosity of 1800cp / 25°C was distilled under reduced pressure to obtain isophthalic acid Phenolic resin. The solid content of the resin prepared in this embodiment is 71%, and the moisture content is 16%.

[0029] The resorcinol resin curing agent prepared in this example was added to the phenolic resin, wherein the mass ratio of the phenolic resin to the resorcinol resin was 100:5. The experimental results showed that the curing time of the phenol...

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Abstract

The invention provides a preparation method of resorcinol resin, which comprises the following steps: mixing resorcinol, aldehyde compound and basic compound to react, thereby obtaining a mixture product; and regulating the pH value of the mixture product with an alkaline filler, and carrying out vacuum distillation to obtain the resorcinol resin. The resorcinol resin prepared by the method provided by the invention is free of acidic materials, thereby avoiding corroding the mold; and in the phenol formaldehyde resin curing process, no acidic materials can be volatilized, so the resorcinol resin is environment-friendly. The addition of the resorcinol resin into the phenol formaldehyde resin can increase the curing speed of the resin, thereby ensuring the storage period of the phenol formaldehyde resin and solving the problem of overlow resin curing speed; and the curing time can be controlled by controlling the addition amount of the resorcinol resin.

Description

technical field [0001] The invention relates to the technical field of glass fiber reinforced plastics, in particular to a preparation method of resorcinol resin. Background technique [0002] The scientific name of FRP is glass fiber reinforced plastic, which is a composite reinforced plastic material that uses glass fiber and its products, such as glass cloth, glass tape, glass mat, glass yarn, etc. as reinforcing materials, and synthetic resin as the matrix material. The relative density of FRP is between 1.5 and 2.0, which is only 1 / 4 to 1 / 5 of that of carbon steel, but the tensile strength of the two is close to or even exceeds that of carbon steel. FRP products are different from traditional material products, and are much better than traditional products in terms of performance, use, and life attributes. Its easy shape, customizable, and color matching features are favored by merchants and sellers, and they occupy more and more market score. At the same time, FRP pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/04C08G8/22
Inventor 江成真殷德刚张宝印李衍昭
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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