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Polymerizable organic strong acid / sulfuric acid composite curing agent and foamable phenolic resin combination thereof

A technology of composite curing agent and strong organic acid, which is applied in the field of polymerizable organic strong acid/sulfuric acid composite curing agent and its foamable phenolic resin composition, can solve the problem of slow reaction, increased apparent density of phenolic foam, safety and thermal insulation. Performance reduction and other problems, to achieve the effect of fast foaming speed, low apparent density and low corrosiveness

Inactive Publication Date: 2013-04-24
北京聚源达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is on the basis of CN101305034A, CN101305035A and JP2010285496, replaces part of inorganic neutralizing agent with organic alkali acid absorbing agent, can reduce the consumption to curing agent when mixing materials, reduce the consumption of curing agent, can drop to 20%, but The so-called acid absorber is essentially a neutralizer, but it is an organic weak base, which reacts slowly with the curing agent, which can reduce the consumption of the curing agent during the mixing process, but it does not solve the problem of the amount of acid curing agent. It is a big problem, and the apparent density of the phenolic foam prepared after adding the inorganic neutralizer or acid absorbing agent in the above method increases, and the safety and thermal insulation properties are reduced

Method used

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  • Polymerizable organic strong acid / sulfuric acid composite curing agent and foamable phenolic resin combination thereof
  • Polymerizable organic strong acid / sulfuric acid composite curing agent and foamable phenolic resin combination thereof
  • Polymerizable organic strong acid / sulfuric acid composite curing agent and foamable phenolic resin combination thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Add 141g of phenol into the reactor and preheat to 80°C; 165g (98%) concentrated sulfuric acid was slowly added to the reaction vessel within 1 hour under stirring, and continued to react for 3 hours after adding; Add 116g of ethylene glycol, stir evenly, then cool and discharge to obtain curing agent C-1.

[0040] 2. Weigh 90g of liquid resole phenolic resin, 2.7g of DC-193, 8.1g of methylene chloride, 7.2g of curing agent C-1 in a plastic beaker. In a 200*200*40 steel mould, put the mold into a 60-75°C oven to foam for 20 minutes, cool and demould, and obtain a uniform cell structure and an apparent density of 0.043g / cm 3 The high-quality phenolic foam has a closed cell rate greater than 92% and a pH value of 5.8.

Embodiment 2

[0042] 1. Add 141g of phenol into the reactor and preheat to 80°C; Slowly add 180g (98%) concentrated sulfuric acid to the reaction vessel under stirring within 1 hour, and continue to react for 3 hours after adding; Add 80g of diethylene glycol, stir evenly, then cool and discharge to obtain curing agent C-2.

[0043] 2. Weigh 90g of liquid resole phenolic resin, 2.7g of DC-193, 8.1g of methylene chloride, 6.3g of curing agent C-2 in a plastic beaker. In a 200*200*40 steel mould, put the mold into a 60-75°C oven to foam for 20 minutes, cool and demould, and obtain a uniform cell structure and an apparent density of 0.041g / cm 3 The high-quality phenolic foam has a closed cell rate of more than 92% and a pH value of 5.6.

Embodiment 3

[0045] 1. Add 162g m-cresol into the reactor and preheat to 80°C; 172.5g (98%) concentrated sulfuric acid was slowly added to the reaction vessel within 1 hour under stirring, and the reaction was continued for 3 hours after adding; Add 175 g of triethylene glycol compound, stir evenly, then cool and discharge to obtain curing agent C-3.

[0046] 2. Weigh 90g of liquid resole phenolic resin, 3.6g of Tween-80, 6.3g of n-pentane, 7.8g of curing agent C-3 in a plastic beaker. Put the mold into a 200*200*40 steel mould, put the mold into a 60-75°C oven for foaming for 20 minutes, cool and demould, and obtain a uniform cell structure and an apparent density of 0.045g / cm 3 The phenolic foam has a closed cell rate of 93% and a pH value of 5.8.

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Abstract

The invention discloses a polymerizable organic strong acid / sulfuric acid composite curing agent and a foamable phenolic resin combination thereof. The combination comprises 100 parts of liquid A-stage phenolic resin, 7-9 parts of foaming agents, 2-6 parts of foam stabilizer, and 6-10 parts of polymerizable organic strong acid / sulfuric acid composite curing agents. The polymerizable organic strong acid / sulfuric acid composite curing agents are obtained through phenol or metacresol sulfonated in slightly excessive concentrated sulfuric acid, postprocessing processes of separation and the like are not needed, preparation processes are simple, and cost in low. The polymerizable organic strong acid / sulfuric acid composite curing agent can be chemically bonded with phenolic resin and directly brought in structure of foams, the polymerizable organic strong acid / sulfuric acid composite curing agent is not easy to permeate, small in corrosivity of base materials due to the fact that the potential of hydrogen (PH) value of the obtained foams reaches up to 5.8, rapid in foaming speed, and free from foam collapse and foam contraction.

Description

technical field [0001] The invention relates to a polymerizable organic strong acid / sulfuric acid composite curing agent and a foamable phenolic resin composition thereof. Background technique [0002] Polymer foams are used as thermal insulation materials because of their porosity, light weight, and low heat transfer coefficient. Several polymer foam materials commonly used at present include polyurethane foam, polystyrene foam, polyethylene foam, and phenolic resin foam. Among them, although polyurethane, polystyrene, and polyethylene foam have good thermal insulation effect and high strength, they all have disadvantages such as low heat resistance temperature, easy to burn, easy to drip when burned, and large amount of smoke, making them especially suitable for practical applications. It is limited in the application of high temperature pipeline insulation, construction and other aspects. The phenolic foam material not only has a good heat preservation effect, but also ...

Claims

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Application Information

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IPC IPC(8): C08K5/42C08K3/30C08L61/06C08J9/14
Inventor 胡和丰黄洪亮方琳邱郑富刘瑞瑞
Owner 北京聚源达科技有限公司
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