Preparation method of novel environment friendly phenolic foamed plastic

A phenolic foam and phenolic foam technology are applied in the field of preparation of new environmentally friendly phenolic foams, which can solve the problems of small molecular weight, pollute the air in the production workshop, and threaten the health of workers, improve water resistance and toughness, and reduce VOC. The effect of emissions

Inactive Publication Date: 2019-03-12
JIANGSU QIANXIANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main raw materials for the production of foamed phenolic resin are phenol and formaldehyde, especially formaldehyde, which has a small molecular

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] First add an appropriate amount of 2g sulfuric acid and 20g water to 150g xylene resin, stir at 60°C for 0.5h, adjust the pH to 8.5-9.5 with magnesium oxide, then add 100g phenol, react at 65°C for 2.5h, then heat up to 82°C for reaction 2h, cooling and adding urea, and finally adding resin mass 3% Tween-80, stirring evenly and discharging.

[0022] 100g of self-made foamed phenolic resin and 5g of n-pentane were fully stirred, and then 20g of curing agent (the mass ratio of p-toluenesulfonic acid, phosphoric acid, benzenesulfonic acid, acetic acid and water was 5:3:1:1:2 was added. ) Quickly stir evenly, pour it into a pre-heated mold of 70-80° C. for foaming and curing for 5-10 minutes, and obtain a new type of environmentally friendly phenolic foam. %, VOC emission phenol 9mg / m 3 , formaldehyde 2.8mg / m 3 .

Example Embodiment

[0023] Example 2

[0024] First add an appropriate amount of 2.5g phosphoric acid and 20g water to 200g xylene resin, stir at 60°C for 0.5h, adjust the pH to 8.5-9.5 with zinc oxide, then add 100g phenol, react at 65°C for 2h, then heat up to 83°C for reaction 2h, cooling and adding thiourea, and finally adding resin mass 3% Tween-40, stirring evenly and discharging.

[0025] The mixture of 100g of self-made foamed phenolic resin and 5g of n-pentane and isopentane was fully stirred, and then 22g of curing agent (the mass ratio of p-toluenesulfonic acid, phosphoric acid, benzenesulfonic acid, acetic acid and water was 5:3 was added. : 1: 1: 2) Quickly stir evenly, pour it into a pre-heated mold at 70-80° C. for foaming and curing for 5-10 minutes, and obtain a new type of environmentally friendly phenolic foam. The phenolic foam has fine cells and a water absorption rate of 5.0 %, slag removal rate 5%, VOC emission phenol 7mg / m 3 , formaldehyde 2.5mg / m 3 .

Example Embodiment

[0026] Example 3

[0027] First add an appropriate amount of 2.5g p-toluenesulfonic acid and 20g water to 100g xylene resin, stir at 60°C for 0.5h, adjust the pH to 8.5-9.5 with calcium oxide, then add 100g phenol, react at 65°C for 2h, then heat up to The reaction was carried out at 83°C for 1.5h, the temperature was lowered, and dicyandiamide was added, and finally, 2% DC-193 of resin mass was added, and the mixture was stirred evenly and discharged.

[0028] 100g of self-made foamed phenolic resin and 4g of n-pentane were fully stirred, and then 25g of curing agent was added (the mass ratio of p-toluenesulfonic acid, phosphoric acid, benzenesulfonic acid, acetic acid and water was 5:3:1:1:2 ) Quickly stir evenly, pour it into a pre-heated mold at 70-80° C. for foaming and curing for 5-10 minutes, and obtain a new type of environmentally friendly phenolic foam. The phenolic foam has fine cells, and the water absorption rate is 5.2%. %, VOC emission phenol 9mg / m 3 , formald...

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PUM

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Abstract

The invention relates to a preparation method of a novel environment friendly phenolic foamed plastic. The preparation method of the novel environment friendly phenolic foamed plastic is characterizedby zero formaldehyde adding, thereby simplifying production processes, greatly reducing VOC (volatile organic compounds) of operating workshops and finished products and improving tenacity and waterproofness of phenolic foams. The prepared novel environment friendly phenolic foamed plastic is fine in foam cells and achieves a water absorbing rate of 3.5-5%, a residue rate of 5-10% and a VOC emission rate of phenol lower than 10 mg/m3 and formaldehyde lower than 3 mg/m3.

Description

technical field [0001] The invention relates to a preparation method of a novel environment-friendly phenolic foam plastic, belonging to the field of materials. The use of zero formaldehyde addition simplifies the production process, greatly reduces the VOC emissions of the operation workshop and the final product, and improves the toughness and water resistance of the phenolic foam. Background technique [0002] In recent years, with the rapid development of construction, petrochemical, shipbuilding and other industries, materials with light weight, fire resistance and low toxicity have gradually attracted attention. Among the commonly used thermal insulation foam materials, phenolic foam plastics are widely used because of their incomparable advantages over other foam plastics. In 2016, phenolic foam accounted for 10% of the market share of organic insulation materials, reaching 5 million cubic meters. In order to achieve the 75% energy-saving goal during the 13th Five-Y...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08G14/12C08L61/34
CPCC08G14/12C08J9/141C08J2203/14C08J2203/202C08J2361/34
Inventor 翟立安翟羽佳
Owner JIANGSU QIANXIANG NEW MATERIAL TECH CO LTD
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