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Modified phenolic resin, foamed material thereof and method for preparing same

A technology of phenolic resin foam and phenolic resin, which is applied in the field of polymer building energy-saving materials, can solve the problems of unsatisfactory modification effect, high water absorption rate, and low foam closed cell rate, and achieve no global greenhouse effect coefficient and closed cell rate. High, environmental protection and high safety effect

Inactive Publication Date: 2010-06-02
江苏丰彩建材(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technologies have low foam closed cell rate and high water absorption rate for phenolic resin foam materials, so they cannot be directly used for external wall insulation, so the modification effect is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 400kg of phenol and 3kg of caustic soda aqueous solution as a catalyst into a 1-ton reactor, stir at 35°C for 20 minutes, add 150kg of paraformaldehyde into the reactor in three batches within 60 minutes, keep it warm for 15 minutes after the addition, and raise the temperature to 75°C, keep warm for 30 minutes, cool down to 30°C, add 20kg of amino-terminated polyether (molecular mass: 5000), keep warm for 20 minutes, add 5kg of butanediamine as a modification aid, keep warm for 10 minutes, and cool down to room temperature. Add anhydrous acetic acid dropwise to adjust the pH value to neutral to obtain a modified phenolic resin.

[0031] Then, the obtained modified phenolic resin (relative molecular mass 5000) 100kg, add 2kg composite foam stabilizer (sodium lauryl sulfate, silicone surfactant, mass ratio is 1: 0.5), 8kg combined foaming agent (n-pentane, n-hexane, mass ratio is 1: 1), 4kg foaming nucleating aid KH570 modified nano-calcium carbonate, under 25 ℃, vig...

Embodiment 2

[0033] Add 400kg of phenol, 4kg of caustic soda and calcium hydroxide mixed aqueous solution into a 1-ton reaction kettle, stir at 45°C for 20 minutes, add 280kg of paraformaldehyde into the reaction kettle in four batches within 40 minutes, keep warm for 20 minutes after the addition, and replenish Add 1kg of caustic soda aqueous solution, heat up to 80°C, keep warm for 40 minutes, cool down to 40°C, add 50kg of amino-terminated polyether (relative molecular mass: 2000), keep warm for 20 minutes, add 4kg of pentamethylenediamine, keep warm for 20 minutes, drop to At room temperature, adjust the pH to neutral.

[0034] Next, 100 kg of the above-mentioned amino-terminated polyether (relative molecular mass: 2000) modified phenolic resin was added, and 1 kg of composite foam stabilizer (including sodium dodecylbenzenesulfonate and silicone surfactant, with a mass ratio of 1:1) was added. , 8kg combined foaming agent (including n-pentane, cyclohexane, mass ratio is 1:0.5), 5kg fo...

Embodiment 3

[0036] Add 400kg of phenol, 10kg of caustic soda and calcium oxide mixed aqueous solution into a 1-ton reactor, stir at 50°C for 15 minutes, add 350kg of paraformaldehyde into the reactor in five batches in 90 minutes, keep warm for 30 minutes after the addition, and replenish Add 3kg of caustic soda aqueous solution, heat up to 75°C, keep warm for 30 minutes, cool down to 35°C, add 100kg of amino-terminated polyether (relative molecular mass: 8000), keep warm for 30 minutes, add 6kg of butanediamine, keep warm for 20 minutes, drop to At room temperature, adjust the pH value to neutral to obtain a modified phenolic resin.

[0037] Then, 100kg of amino-terminated polyether (relative molecular weight 8000) modified phenolic resin was added, 6kg of composite foam stabilizer (comprising sodium cetylsulfonate, silicone surfactant, mass ratio was 1: 2), and 12kg of combined Foaming agent (comprising sherwood oil, cyclohexane, mass ratio is 1: 2), 0.5kg foaming nucleating aid TC-3 mo...

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PUM

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Abstract

The invention relates to a modified phenolic resin, a foamed material thereof and a method for preparing the same, and belongs to the technical field of polymeric building energy-saving materials. The modified phenolic resin comprises the following components in part by weight: 100 parts of phenol, 30 to 100 parts of paraformaldehyde, 0.2 to 5 parts of catalytic agent, 5 to 30 parts of amino terminated polyether polymer and 1 to 8 parts of performance additive. The modified phenolic resin is prepared through the steps of low temperature addition and high temperature polycondensation. The foamed material of the modified phenolic resin is prepared through the steps of: mixing the modified phenolic resin, a foam stabilizer, a foaming agent and a foaming and nucleating auxiliary agent, and then pre-heating the mixture; adding a curing agent and raising the temperature to prefoam the mixture; and finally raising the temperature to cure the mixture. Compared with the prior art, the foamed material has the advantages of high closed porosity, simple process, environmental protection, high safety and the like.

Description

technical field [0001] The invention relates to a modified phenolic resin, a modified phenolic resin foam material, and a preparation method thereof, belonging to the technical field of polymer building energy-saving materials. Background technique [0002] Due to its light weight, easy availability of raw materials, high flame retardancy, carbonization of the surface when exposed to open flames, and low smoke density, phenolic resin foams have received more and more attention, especially in building energy conservation. Phenolic resin foams are widely used in External insulation of external walls has brought about a revolution in building energy-saving technologies and products. However, due to the characteristics of its own structure, phenolic resin foam material has disadvantages such as high brittleness, easy powder falling, and low compressive strength, which directly limit the application range of phenolic resin foam material. [0003] In recent years, the modificatio...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G8/10C08G65/00C08L61/08C08J9/14
Inventor 沈志明朱殿奎季永新李晴朱灿银宣云干
Owner 江苏丰彩建材(集团)有限公司
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