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Production method of nonformaldehyde phenolic foams

A technology of phenolic foam and production method, which is applied in the field of high molecular organic compounds, can solve problems such as shedding, limiting the scope of use of phenolic foam, and powdering of slag, and achieves the reduction of the formation of chromophores, excellent oxidation resistance, and synthetic conditions. mild effect

Inactive Publication Date: 2014-04-09
湖南中野高科技特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high rigidity of the molecular chain of the phenolic resin, the brittleness of the phenolic foam is often increased, especially the phenolic foam board, which is prone to falling off and slag powdering during use.
Moreover, this defect of phenolic foam will gradually deepen over time, making it more and more fragile until it is scrapped.
This defect of phenolic foam has restricted its development
In addition, the formaldehyde and phenol contained in phenolic foam are a hidden danger to the surrounding environment. If this hidden danger cannot be eradicated for a long time, it will undoubtedly seriously limit the scope of use of phenolic foam

Method used

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  • Production method of nonformaldehyde phenolic foams
  • Production method of nonformaldehyde phenolic foams
  • Production method of nonformaldehyde phenolic foams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Take 350kg of phenol, 104kg of styrene, 679kg of terephthalmic alcohol, 1.5kg of sodium hydroxide, and 80kg of water for use;

[0015] (2), put the phenol, sodium hydroxide, styrene and water prepared in step (1) into the reaction kettle, and heat up to 80-85°C. Keep the temperature for 30min;

[0016] (3) Raise the temperature in the reactor to 88-92°C and keep the temperature for 60 minutes. Then lower the temperature to 80-85° C., and add 1 / 3 of the prepared terephthalmic alcohol in step (1). At an interval of 15 minutes, add 1 / 3 of the terephthalic alcohol prepared in step (1). After another 15 minutes, add the remaining 1 / 3 of the terephthalic alcohol prepared in step (1). Keep the temperature in the reactor at 80-85°C during the above feeding process;

[0017] (4) Slowly raise the temperature in the reactor to 95-110°C, and keep the temperature for 60-180 minutes. Lower the temperature in the kettle to 50-60°C to obtain phenolic resin for later use;

[0...

Embodiment 2

[0020] (1) Take 400kg of phenol, 135kg of styrene, 811kg of terephthalenedimethanol, 2kg of sodium hydroxide, and 150kg of water for use;

[0021] (2), put the phenol, sodium hydroxide, styrene and water prepared in step (1) into the reaction kettle, and heat up to 80-85°C. Keep the temperature for 60min;

[0022] (3) Raise the temperature in the reactor to 88-92°C and keep the temperature for 80 minutes. Then lower the temperature to 80-85° C., and add 1 / 3 of the prepared terephthalmic alcohol in step (1). At an interval of 25 minutes, add 1 / 3 of the terephthalamide prepared in step (1). After another 25 minutes, add the remaining 1 / 3 of the terephthalic alcohol prepared in step (1). Keep the temperature in the reactor at 80-85°C during the above feeding process;

[0023] (4) Slowly raise the temperature in the reactor to 95-110°C, and keep the temperature for 180 minutes. Lower the temperature in the kettle to 50-60°C to obtain phenolic resin for later use;

[0024] (5...

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Abstract

A production method of nonformaldehyde phenolic foams adopts the following raw materials and comprises the steps of (1) preparing carbolic acid, styrene, terephthalyl alcohol, sodium hydroxide and water; (2) inputting the raw materials into a reaction still for temperature rise; (3) adding the terephthalyl alcohol at intervals; (4) slowly rising the temperature to 95-110 DEG C and keeping for 60-180min, and dropping the temperature to be 50-60 DEG C to obtain phenolic resin; and (5) obtaining the phenolic resin, an organosiliconefoam stabilizer, n-pentane, a curing agent and water to be mixed and injected in a die to obtain nonformaldehyde phenolic foam end products. According to the production method, the terephthalyl alcohol is used for replacing formaldehyde in a traditional process, the activity is high and swimming carbolic acid does not need to be reserved. Due to the addition of the styrene and the terephthalyl alcohol, the formation number of color bodies is reduced effectively, and the phenolic foams are difficult to oxide so as to be small in change of color, so that the nonformaldehyde phenolic foams have excellent oxidation resistance and can not atomize and drop residues for a long time.

Description

technical field [0001] The invention belongs to the technical field of macromolecular organic compounds, and in particular relates to a production method of formaldehyde-free phenolic foam. Background technique [0002] Phenolic foam not only has low thermal conductivity and good thermal insulation performance, but also has many advantages such as flame retardant, good thermal stability, light weight, low smoke, low toxicity, heat resistance, high mechanical strength, sound insulation, and strong chemical corrosion resistance. Phenolic foam has abundant sources of raw materials, low price, mature production and processing technology, and wide range of products. It is suitable for large-scale cold storage, storage tanks, ships and various thermal insulation pipes and construction industries, such as: central air-conditioning ducts, light-weight thermal insulation color steel plates, house thermal insulation materials, petrochemical pipeline thermal insulation materials, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L65/00C08K5/42C08K3/32C08K3/30C08G61/02C08J9/14
Inventor 谢建军黎超喻泽熊稳张述
Owner 湖南中野高科技特种材料有限公司