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Room-temperature foamable phenolic resin and method for preparing phenolic foams by same

A technology of phenolic resin and phenolic foam, which is applied in the field of room temperature expandable phenolic resin and the preparation of phenolic foam by using the same, can solve the problems of phenol-containing wastewater, environmental pollution, and difficulty in controlling the production process, and achieves low investment and strong controllability. , The effect of easy availability of product raw materials

Inactive Publication Date: 2015-03-25
山东宇坤保温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Alkali and metal oxides are used as composite catalysts in existing Chinese and other related patents to produce high-ortho-position and low-viscosity normal temperature phenolic resins. In the above prior art, liquid formaldehyde is used as raw material, and vacuum dehydration is required to produce The process is not easy to control, and a large amount of phenolic wastewater is produced, causing certain environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 1000kg of phenol to the kettle, heat up to 60°C, add 600kg of paraformaldehyde, 10kg of polyester polyol to maintain 65~70°C, if it exceeds 70°C, use jacketed circulating water to cool down; add 3kg of 30% sodium hydroxide every 1.5 hours solution, a total of four additions. After six hours, gradually increase the temperature of the material to 90~95°C, add 10kg of urea after 30 minutes of reaction and continue to react for more than 1 hour, and when the viscosity reaches 2500cp (25°C) by sampling, the temperature is quickly lowered to below 35°C.

[0019] Take 100 parts of the above-mentioned phenolic resin, 2 parts of polysorbate-80, and 8 parts of n-pentane, stir well, add 11 parts of toluenesulfonic acid, stir at room temperature (10~30°C) for 3 seconds at high speed, and get Phenolic foam with a density of 40 kg / m3.

Embodiment 2

[0021] Add 1000kg of phenol to the kettle, raise the temperature to 50°C, add 550kg of paraformaldehyde and 50kg of melamine to maintain 70~75°C, if it exceeds 75°C, use jacketed circulating water to cool down; add 10kg of 30% sodium hydroxide solution every 1.2 hours, a total of Add four times. After six hours, gradually increase the temperature of the material to 85~90°C, add 6kg of urea after 30 minutes of reaction and continue to react for more than 1 hour, and when the viscosity reaches 3500cp (25°C) by sampling, the temperature is quickly lowered to below 35°C.

[0022] Take 100 parts of the above-mentioned phenolic resin and 6 parts of petroleum ether, stir well, add 8 parts of toluenesulfonic acid and 2 parts of phosphoric acid, stir at room temperature (10~30°C) for 3 seconds at high speed, and obtain a density of 40 kg / m3 of phenolic foam.

Embodiment 3

[0024] Add 1000kg of phenol to the kettle, raise the temperature to 55°C, add 750kg of paraformaldehyde and 30kg of polyvinyl alcohol to maintain 70~75°C, if it exceeds 75°C, use jacketed circulating water to cool down; add 5kg of 30% sodium sulfite solution every 1 hour, for a total of Add four times. After six hours, gradually increase the temperature of the material to 85~90°C, add 6kg of urea after 30 minutes of reaction and continue to react for more than 1 hour, and when the viscosity reaches 3500cp (25°C) by sampling, the temperature is quickly lowered to below 35°C.

[0025] Take 100 parts of the above-mentioned phenolic resin, 4 parts of water-soluble silicone oil, and 5 parts of n-pentane, stir well, add 6 parts of xylenesulfonic acid and 6 parts of phosphoric acid, stir at room temperature (10~30°C) for 3 seconds at high speed, 4 After 10 minutes, a phenolic foam with a density of 40 kg / m3 was obtained.

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PUM

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Abstract

The invention belongs to the technical field of phenolic resin and particularly discloses a room-temperature foamable phenolic resin and a method for preparing phenolic foams by the same. The room-temperature foamable phenolic resin is obtained by adding triformol and modifier into phenol at one step, adding catalyst at multiple steps, performing addition at medium temperature and polycondensation at high temperature. The phenolic foams fine compactness and flexibility and high in strength are obtained by foaming and curing the phenolic resin for 2-5 minutes at the certain temperature. The method for preparing phenolic foams is simple in steps, stable in process reaction, high in controllability, low in investment for fixed assets, free of waste water discharge, free of greenhouse effect by alkane as foaming agent, and applicable to wide popularization and application, and raw materials are easy to obtained.

Description

(1) Technical field [0001] The invention belongs to the technical field of phenolic resins, in particular to a room-temperature-expandable phenolic resin and a method for preparing phenolic foam by using the same. (2) Background technology [0002] Phenolic foam produced by phenolic resin has the characteristics of low thermal conductivity, non-combustibility, and low smoke toxicity. Phenolic foam has a history of many years and is the best fireproof foam among thermal insulation foams. Despite these advantages, phenolic foam is not in the thermal insulation market. Widely used, the main reason is that the ideal cured phenolic foam can be obtained under heating conditions, and there are few phenolic resins suitable for low-temperature pouring and spraying. [0003] Alkali and metal oxides are used as composite catalysts in existing Chinese and other related patents to produce high-ortho-position and low-viscosity normal temperature phenolic resins. In the above prior art...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/10C08G14/08C08J9/14C08L61/34C08K5/42C08K3/32
Inventor 胡玉焦守亮焦靖雯
Owner 山东宇坤保温材料有限公司