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 time-consuming, etc., to achieve the effect of reducing dosage, improving the scope of use, and expanding the scope of use

Inactive Publication Date: 2018-07-03
LONGYAN ZIJIN INNOVATION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using hexamethylenetetramine to cure thermoplastic phenolic resin at normal temperature and pressure takes a long time, and hexamethylenetetramine is easy to react with acid curing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of neutral phenolic foam plastics, the raw material of this neutral phenolic foam plastics is composed of: 100 parts by weight of thermosetting phenolic resin, the solid content of described thermosetting phenolic resin is: 75%, the viscosity of this thermosetting phenolic resin at 25 ℃ is 1000 cp; 2 parts by weight of surfactant silicone oil, 3 parts by weight of foaming agent pentane, 0.5 part by weight of melamine, and 1.5 parts by weight of acid curing agent phosphoric acid.

[0034] The preparation method of the above-mentioned neutral phenolic foamed plastics, first mixes thermosetting phenolic resin, surfactant, and foaming agent; then adds acid curing agent and mixes evenly to obtain a mixture; foams the mixture in a microwave environment; The power was 500W; the mixture was microwaved at 50°C for 40 minutes.

Embodiment 2

[0036] A kind of neutral phenolic foamed plastics, the raw material of this neutral phenolic foamed plastics is composed of: 100 parts by weight of thermosetting phenolic resin, the solid content of described thermosetting phenolic resin is: 85%, the viscosity of this thermosetting phenolic resin at 25 ℃ is 20000 cp; 5 parts by weight of surfactant Tween, 13 parts by weight of hexanes as foaming agent, 3 parts by weight of melamine, and 5 parts by weight of acid curing agent oxalic acid.

[0037] The preparation method of the above-mentioned neutral phenolic foamed plastics, first mixes thermosetting phenolic resin, surfactant, and foaming agent; then adds acid curing agent and mixes evenly to obtain a mixture; foams the mixture in a microwave environment; The power was 1200W; the mixture was microwaved at 80°C for 8 minutes.

Embodiment 3

[0039] A kind of neutral phenolic foamed plastics, the raw material of this neutral phenolic foamed plastics is composed of: 100 parts by weight of thermosetting phenolic resin, the solid content of described thermosetting phenolic resin is: 78%, the viscosity of this thermosetting phenolic resin at 25 ℃ is 2000cp; 2 parts by weight of surfactant silicone oil, 2 parts by weight of Tween, 3 parts by weight of foaming agent pentanes, 3 parts by weight of hexanes, 1 part by weight of melamine, and 2 parts by weight of acid curing agent p-toluenesulfonic acid.

[0040] The preparation method of the above-mentioned neutral phenolic foamed plastics, first mixes thermosetting phenolic resin, surfactant, and foaming agent; then adds acid curing agent and mixes evenly to obtain a mixture; foams the mixture in a microwave environment; The power was 700W; the mixture was microwaved at 60°C for 15 minutes.

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Abstract

The invention provides a neutral phenolic foam plastic which is prepared from the following raw materials in parts by weight: 100 parts of thermosetting phenolic resin, 2-5 parts of a surfactant, 3-13parts of a foamer, 0.5-3 parts of melamine and 1.5-5 parts of an acid curing agent. The invention also provides a preparation method of the neutral phenolic foam plastic. The preparation method comprises the following steps: mixing the thermosetting phenolic resin, the surfactant and the foamer; then adding the acid curing agent to be uniformly mixed to prepare a mixture; and foaming the mixturein a microwave environment. The neutral phenolic foam plastic prepared by the invention is reasonable in formula, simple in preparation process and low in cost, and the dosage of the acidifying agentis reduced greatly; the prepared phenolic foam plastic does not corrode the building surface or metal contacting the phenolic foam plastic.

Description

technical field [0001] The invention relates to the field of phenolic foam plastics, in particular to a neutral phenolic foam plastic and a preparation method thereof. Background technique [0002] In recent years, the field of application of phenolic foam is constantly expanding due to its heat resistance and heat insulation, flame retardant and self-extinguishing, flame penetration resistance, and low toxicity. However, a problem that cannot be ignored in phenolic foam products is that because the curing agents used are organic or inorganic acids, phenolic foams are generally medium-strong acidic, and the pH value is between 1 and 4. It will cause strong corrosion to the surface material compounded on the phenolic foam plastic, especially the metal surface material, which greatly reduces the application range of the phenolic foam plastic product. Previously, there were reports on the preparation of neutral phenolic foam plastics by directly using alkaline foaming agents (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08K5/3492C08J9/14
Inventor 张均明林水东
Owner LONGYAN ZIJIN INNOVATION RES INST
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