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A kind of neutral phenolic foam plastic and preparation method thereof

A phenolic foam, neutral technology, applied in the field of phenolic foam, can solve the problems of building surface corrosion, complicated process, difficult process, etc., and achieve the effect of low cost, simple preparation process and short time consumption

Active Publication Date: 2017-08-25
北京傲德新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of neutral phenolic foam plastics and preparation method thereof, solve the problem that traditional phenolic foam causes corrosion to the metal or alkaline cement building surface that contacts with it because of the acidity of foam itself in the course of use, overcomes prior art In order to prepare neutral phenolic foam plastics, use alkaline foaming agent instead of traditional foaming agent or add alkaline slow-release microcapsules to the formula or use hexamethylenetetramine to cure thermoplastic phenolic resin. Difficult to control the process, high cost and long time-consuming and other technical problems

Method used

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  • A kind of neutral phenolic foam plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The weight proportion of each component of neutral phenolic foam plastics is:

[0034] Expandable phenolic resin: 100 parts;

[0035] Surfactant: Tween-80, 5 parts;

[0036] Foaming agent: n-pentane, 6 parts;

[0037] Composite alkali metal salt: 15 parts, including 12 parts of barium carbonate and 3 parts of anhydrous sodium acetate;

[0038] Curing agent: p-toluenesulfonic acid, 18 parts.

[0039] Preparation process: at room temperature, mix expandable phenolic resin, surfactant and foaming agent according to the formula composition, stir evenly, then add complex alkali metal salt and curing agent, stir evenly at high speed, and immediately pour the mixture into the mold Then put the mold into an oven at 75°C, keep it for 25 minutes and then take out the phenolic foam from the mold to obtain a foam density of 45kg / m 3 .

Embodiment 2

[0041] The weight proportion of each component of neutral phenolic foam plastics is:

[0042] Expandable phenolic resin: 100g;

[0043] Surfactant: Tween-60, 6g;

[0044] Foaming agent: petroleum ether, 6.5g;

[0045] Compound alkali metal salt: 18g, including 15g of barium carbonate and 3g of sodium lactate pentahydrate;

[0046] Curing agent: phenolsulfonic acid, 18g.

[0047] The preparation process is the same as in Example 1, and after testing, the obtained density is 48kg / m 3 phenolic foam.

Embodiment 3

[0049] The weight ratio of each component of the phenolic foam plastic is:

[0050] Expandable phenolic resin: 100g;

[0051] Surfactant: PEG-25, 4g;

[0052] Foaming agent: cyclohexane, 4.5g;

[0053] Compound alkali metal salt: 20g, including 15g of barium carbonate, 3g of anhydrous sodium acetate, and 2g of trisodium phosphate;

[0054] Curing agent: phenolsulfonic acid, 20g.

[0055] The preparation process is the same as in Example 1, and after testing, the obtained density is 47kg / m 3 phenolic foam.

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Abstract

The invention relates to a neutral phenolic foamed plastic and a preparation method thereof. The raw material composition includes 100 parts of expandable phenolic resin, 10-25 parts of compound alkali metal salt, 3-8 parts of surfactant, 4-10 parts of foam Foaming agent and 15 to 25 parts of organic acid curing agent. The formula is reasonable, the preparation process is simple, the cost is low, the reaction between the composite alkali metal salt and the organic acid curing agent is slow, and in the foaming and curing stage, the curing effect of the acid curing agent will not be hindered, and the preparation of the composite alkali metal salt is simple and convenient. No complicated processing is required; the prepared phenolic foam not only retains the low thermal conductivity and high flame retardancy properties of traditional acidic phenolic foam, but also the prepared phenolic foam is neutral and will not damage the Corrosion of building surfaces or metals in contact with it.

Description

technical field [0001] The invention relates to a phenolic foamed plastic, in particular to a neutral phenolic foamed plastic and a preparation method thereof. Background technique [0002] Phenolic foam is widely used in the field of building insulation because of its excellent thermal insulation and flame retardancy. In the preparation process of phenolic foam, the phenolic resin, surfactant, foaming agent and filler are generally mixed uniformly first, and then the inorganic acid or organic acid is used as the resin curing agent to foam and cure at a certain temperature. The acid is strong, and it is corrosive to the metal in contact with it or some acid-resistant surfaces during use. After long-term use, it is easy to cause damage to the contact surface of the material. [0003] In the patent whose publication number is CN1566206A, an alkaline foaming agent, including sodium carbonate, sodium bicarbonate, magnesium carbonate or sodium phosphate, is used to replace the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/14C08K13/02C08K3/26C08K3/32C08K5/09C08K5/42C08J9/14
Inventor 朱佑平黄勇
Owner 北京傲德新材料科技有限公司