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Vegetable tannin extract modified phenol formaldehyde foam and preparation method thereof

A technology of phenolic foam and tannin extract, applied in the field of phenolic foam, can solve the problems of increased viscosity of phenolic resin, insufficient strength of phenolic foam and high content of free formaldehyde, and achieves the effects of reducing viscosity, reducing dependence on petrochemical resources and reducing costs

Inactive Publication Date: 2013-03-20
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

[0008] The invention provides a phenolic foam modified with tannin extract and a preparation method thereof, which solves the technical problem that the phenolic resin has low activity and increases the viscosity of the phenolic resin when the tannin extract is directly applied to the phenolic resin without degradation treatment, and solves the insufficient strength of the phenolic foam , technical problems of high content of free formaldehyde

Method used

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  • Vegetable tannin extract modified phenol formaldehyde foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1, this tannin extract modified phenolic foam is made from the following raw materials in proportion by weight:

[0053] 100 parts of tannin extract modified phenolic resin;

[0054] 5 parts of surfactant;

[0055] 3 parts foaming agent;

[0056] 15 parts of curing agent;

[0057] The tannin extract modified phenolic resin is made from the following raw materials in proportions by weight:

[0058] 100 parts of phenol;

[0059] 35 parts of tannin extract degradation solution;

[0060] 65 parts of paraformaldehyde;

[0061] 5 parts of urea;

[0062] 1 part of melamine;

[0063] 8 parts of ethylene glycol.

[0064] The tannin extract degradation solution is the degraded tannin extract obtained by degrading and pretreating tannin extract with hydrogen peroxide under alkaline conditions.

[0065]

Embodiment 2

[0066] Embodiment 2, this tannin extract modified phenolic foam is made from the following raw materials in proportion by weight:

[0067] 100 parts of tannin extract modified phenolic resin;

[0068] 8 parts of surfactant;

[0069] 7 parts foaming agent;

[0070] 20 parts of curing agent;

[0071] The tannin extract modified phenolic resin is made from the following raw materials in proportions by weight:

[0072] 100 parts of phenol;

[0073] 45 parts of tannin extract degradation solution;

[0074] 71 parts of paraformaldehyde;

[0075] 7 parts of urea;

[0076] 2 parts of melamine;

[0077] 12 parts of ethylene glycol.

[0078] The tannin extract degradation solution is the degraded tannin extract obtained by degrading and pretreating tannin extract with hydrogen peroxide under alkaline conditions.

[0079]

Embodiment 3

[0080] Embodiment 3, this tannin extract modified phenolic foam is made by the following raw materials in proportion by weight:

[0081] 100 parts of tannin extract modified phenolic resin;

[0082] 5 parts of surfactant;

[0083] Foaming agent 9 parts;

[0084] 18 parts of curing agent;

[0085] The tannin extract modified phenolic resin is made from the following raw materials in proportions by weight:

[0086] 100 parts of phenol;

[0087] 40 parts of tannin extract degradation solution;

[0088] 66 parts of paraformaldehyde;

[0089] 6 parts of urea;

[0090] 2 parts of melamine;

[0091] 11 parts of ethylene glycol.

[0092] The tannin extract degradation solution is the degraded tannin extract obtained by degrading and pretreating tannin extract with hydrogen peroxide under alkaline conditions.

[0093]

[0094] In the above embodiments 1 to 3, the surfactant can be Tween-80, Tween-60, EL-40 or PEG-25.

[0095] The blowing agent can be any one of n-pentane, cy...

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Abstract

The invention relates to a vegetable tannin extract modified phenol formaldehyde foam and a preparation method thereof. The vegetable tannin extract modified phenol formaldehyde foam is prepared from the following raw materials in parts by weight: 100 parts of vegetable tannin extract modified phenol formaldehyde resin, 5-8 parts of surfactant, 3-9 parts of foaming agent and 15-20 parts of curing agent, wherein the vegetable tannin extract modified phenol formaldehyde resin is prepared from the following raw materials in parts by weight: 100 parts of phenol, 30-50 parts of vegetable tannin extract degradation liquid, 61-73 parts of polyformaldehyde, 5-7 parts of urea, 1-3 parts of melamine and 8-12 parts of ethylene glycol; and the vegetable tannin extract degradation liquid is degraded vegetable tannin extract obtained by performing degradation pretreatment on vegetable tannin extract with oxydol under alkaline conditions. According to the invention, on the premise of not influencing the own flame retardancy and heat-insulating property of the phenol formaldehyde foam, the pull strength and bending failure force of the phenol formaldehyde foam are obviously improved, and the free formaldehyde content in the phenol formaldehyde foam is obviously reduced. The phenol formaldehyde foam can be used as a heat isolation, heat insulation and fireproofing material for buildings, and is a product having favorable market prospects.

Description

technical field [0001] The invention relates to a phenolic foam plastic and a preparation method of the material. Background technique [0002] Extracts are phenolic compounds extracted from plant tannins. Plant tannins widely exist in the secondary metabolites of higher plants. They belong to natural complex polyphenolic compounds and are a kind of natural renewable resources with wide distribution, many varieties and large quantities. In recent years, the properties and application prospects of such modified products of natural materials have attracted widespread attention at home and abroad. Many scholars have carried out basic and applied research on plant tannins from different angles, so that plant tannins continue to obtain new high value-added uses. The tannin in the tannin extract has a multi-component resorcinol structure, which can participate in the reaction in the synthesis of phenolic resin. The reaction process is easy to control, improves the flame retarda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08G8/28C08J9/14C08K13/02C08K5/42C08K3/32C08K5/13
Inventor 孙垂海马榴强朱佑平陈硕
Owner 北京傲德新材料科技有限公司
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