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Modified phenolic resin foam plastic and preparation and application thereof

A technology of phenolic resin and foam plastics, which is applied in the field of thermal insulation materials, can solve the problems of poor strength of modified foam and achieve the effects of reducing loss, good thermal insulation effect and improving mechanical properties

Inactive Publication Date: 2017-11-24
TIANJIN NINGHE COUNTY XINYING INSULATION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the actual application process, the modified foam used will encounter the problem of slightly weaker strength, and more care and caution are required in the process of transportation and handling, and these problems have not been well resolved

Method used

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  • Modified phenolic resin foam plastic and preparation and application thereof
  • Modified phenolic resin foam plastic and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: a kind of modified phenolic resin foamed plastics, comprises bamboo fiber 5.2g, lignin calcium sulfate 24g, polymer 36g, phenol 52g, silicone oil surfactant 2g phenolsulfonic acid 5g, n-pentane 2g.

[0024] A method for making modified phenolic resin foam, comprising the following steps:

[0025] S1: Oxidative degradation of lignin, first add lignin calcium sulfate to water of equal weight, then add sodium hydroxide solution (30%) to pH 10.2, add hydrogen peroxide to react, and finally neutralize with dilute hydrochloric acid to pH 2. Take out the precipitate and wash and filter;

[0026] S2: After mixing the surfactant, acid curing agent, phenol and lignin, react at a temperature of 23°C and a pressure of 2MPa, and obtain a solution of lignin phenolization products after the reaction;

[0027] S3: Add bamboo fiber and foaming agent to the solution of lignin phenolization products in S2, then add formaldehyde, react at 60°C for 2h, then react at 90°C for ...

Embodiment 2

[0028] Embodiment 2: a kind of modified phenolic resin foamed plastics, including bamboo fiber 6g, lignin calcium sulfate 24g, paraformaldehyde 36g, phenol 60g, Tween surfactant 5g, xylenesulfonic acid 10g, isopentane 5g.

[0029] A method for making modified phenolic resin foam, comprising the following steps:

[0030] S1: Oxidative degradation of lignin, first add lignin calcium sulfate to water of equal weight, then add sodium hydroxide solution (30%) to pH 10.2, add hydrogen peroxide to react, and finally neutralize with dilute hydrochloric acid to pH 2. Take out the precipitate and wash and filter;

[0031] S2: After mixing the surfactant, acid curing agent, phenol and lignin, react at a temperature of 300° C. and a pressure of 5 MPa, and obtain a solution of lignin phenolization products after the reaction;

[0032] S3: Add bamboo fiber and foaming agent to the solution of lignin phenolization products in S2, then add formaldehyde, react at 70°C for 2-4h, then react at...

Embodiment 3

[0033] Embodiment 3: a kind of modified phenolic resin foamed plastics, including bamboo fiber 5.6g, lignin calcium sulfate 19.85g, paraformaldehyde 31.25g, phenol 56g, polyether modified siloxane surfactant 3.5g, p-toluenesulfonic acid 7.5g, isopentane, 3.5g.

[0034] A method for making modified phenolic resin foam, comprising the following steps:

[0035] S1: Oxidative degradation of lignin, first add lignin calcium sulfate to water of equal weight, then add sodium hydroxide solution (30%) to pH 10.2, add hydrogen peroxide to react, and finally neutralize with dilute hydrochloric acid to pH 2. Take out the precipitate and wash and filter;

[0036] S2: After mixing the surfactant, acid curing agent, phenol and lignin, react at a temperature of 275° C. and a pressure of 3.5 MPa, and obtain a solution of lignin phenolization products after the reaction;

[0037] S3: Add bamboo fiber and foaming agent to the solution of lignin phenolization products in S2, then add formaldehy...

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Abstract

The invention discloses a modified phenolic resin foam plastic. According to the main points of the technical scheme, the modified phenolic resin foam plastic comprises the raw materials in parts by weight: 100-120 parts of lignin phenolic resin, 2-5 parts of a surfactant, 5-10 parts of an acid curing agent and 2-5 parts of a foaming agent, thereby achieving the technical effect of improving the mechanical property.

Description

technical field [0001] The invention relates to the field of thermal insulation materials, in particular to a modified phenolic resin foam plastic and its preparation and application. Background technique [0002] With the depletion of fossil resources on the earth, people pay more and more attention to the research on the development and utilization of renewable biomass resources, and use renewable biomass resources to completely or partially replace non-renewable mineral resources and their derivatives to prepare new lightweight building materials. The efficient utilization of biomass resources provides a new way for the preparation of new biomass-based foam composites from biomass resources, which is of great significance to the sustainable development of polymer foam materials. [0003] The existing Chinese patent whose application number is CN106976863A can be referred to, which discloses a kind of lignin-modified phenolic resin foam carbon and its preparation method. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08J9/14C08G8/28
CPCC08L61/14C08G8/28C08J9/141C08J9/142C08J2203/14C08J2361/14C08L2203/14C08L2203/18
Inventor 李统占
Owner TIANJIN NINGHE COUNTY XINYING INSULATION MATERIALS
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