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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 weight and is easy to volatilize into the air, seriously polluting the air in the production workshop and posing a serious threat to the health of workers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0022] Fully stir 100g of self-made foaming phenolic resin and 5g of n-pentane, then add 20g of curing agent (the mass ratio of p-toluenesulfonic acid, phosphoric acid, benzenesulfonic acid, acetic acid and water is 5:3:1:1:2 ) and stir evenly, pour it into a pre-heated mold at 70-80°C for foaming and solidification 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 .

Embodiment 2

[0024] First, add 2.5g of phosphoric acid and 20g of water to 200g of xylene resin, stir at 60°C for 0.5h, adjust the pH to 8.5-9.5 with zinc oxide, then add 100g of phenol, react at 65°C for 2h, then heat up to 83°C for reaction After 2 hours, cool down and add thiourea, and finally add 3% Tween-40 of resin quality, stir and discharge evenly.

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

Embodiment 3

[0027] First, add appropriate amount of 2.5g p-toluenesulfonic acid and 20g water to 100g xylene resin, stir at 60°C for 0.5h, then 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 React at 83°C for 1.5h, cool down and add dicyandiamide, and finally add 2% DC-193 by resin mass, stir and discharge evenly.

[0028] Fully stir 100g of self-made foaming phenolic resin and 4g of n-pentane, then add 25g of curing agent (the mass ratio of p-toluenesulfonic acid, phosphoric acid, benzenesulfonic acid, acetic acid and water is 5:3:1:1:2 ) and stir evenly, pour it into a pre-heated mold at 70-80°C for foaming and solidification 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 .

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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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