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A kind of cyanate-based resin modified phenolic resin foam preparation method

A technology based on phenolic resin foam and phenolic resin, which is applied in the field of resin foam preparation, can solve the problems of limited application range and high thermal conductivity, and achieve the effects of good heat resistance, low thermal conductivity and low water absorption

Active Publication Date: 2018-05-15
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 104327451A discloses an aromatic polyester polyol as a toughening agent modified phenolic foam and its preparation method, the invention adds aromatic polyester polyol as an internal toughening agent to modify the phenolic foam in the phenolic resin foaming process The toughness of resin and phenolic foam has been significantly improved, the comprehensive mechanical properties are good, and the foaming rate is easy to control, but the thermal conductivity is high, which limits its application range. At present, there is no modification of cyanate-based phenolic resin in the patent field involved. Based on the various superior properties of cyanate-based phenolic resins, the present invention relates to a cyanate-based phenolic resin-modified expandable phenolic resin foam and its preparation method

Method used

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  • A kind of cyanate-based resin modified phenolic resin foam preparation method

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Embodiment 1

[0025] The present invention is a phenolic resin foam modified by cyanate-based resin and a preparation method thereof, comprising the following steps:

[0026] (1) Set the temperature of the water bath at about 60°C, add 100 parts of phenol into a three-necked flask equipped with a thermometer and a magnetic rotor, then add 1 part of sodium hydroxide and stir evenly for about 5 minutes to activate the phenol, and then divide into batches Add 40 parts of paraformaldehyde, control the addition within half an hour, and keep warm for half an hour after all the addition is completed to make the paraformaldehyde fully react. After fully reacting, gradually increase the temperature to 90°C, keep the constant temperature for about one and a half hours, use acetic acid to adjust the pH to 7-8, and cool the synthesized phenolic resin for 24 hours to obtain the basic expandable phenolic resin.

[0027] (2) Add 10 parts of Span and 8 parts of n-pentane to 100 parts of the expandable phen...

Embodiment 2

[0029] The present invention is a phenolic resin foam modified by cyanate-based resin and a preparation method thereof, comprising the following steps:

[0030] (1) Set the temperature of the water bath at about 60°C, add 100 parts of phenol into a three-necked flask equipped with a thermometer and a magnetic rotor, then add 1 part of sodium hydroxide and stir evenly for about 5 minutes to activate the phenol, and then divide into batches Add 50 parts of paraformaldehyde, control the addition within half an hour, and keep warm for half an hour after all the addition is completed to make the paraformaldehyde fully react. After fully reacting, gradually increase the temperature to 90°C, keep the constant temperature for about one and a half hours, use acetic acid to adjust the pH to 7-8, and cool the synthesized phenolic resin for 24 hours to obtain the basic expandable phenolic resin.

[0031] (2) Add 8 parts of Tween-80 and 10 parts of n-pentane to 100 parts of the expandable ...

Embodiment 3

[0033] The present invention is a phenolic resin foam modified by cyanate-based resin and a preparation method thereof, comprising the following steps:

[0034] (1) Set the temperature of the water bath at about 60°C, add 100 parts of phenol into a three-necked flask equipped with a thermometer and a magnetic rotor, then add 1 part of sodium hydroxide and stir evenly for about 5 minutes to activate the phenol, and then divide into batches Add 45 parts of paraformaldehyde, control the addition within half an hour, and keep warm for half an hour after all the addition is completed to make the paraformaldehyde fully react. After fully reacting, gradually increase the temperature to 90°C, keep the constant temperature for about one and a half hours, use acetic acid to adjust the pH to 7-8, and cool the synthesized phenolic resin for 24 hours to obtain the basic expandable phenolic resin.

[0035] (2) Add 10 parts of Tween-80 and 88 parts of n-pentane to 100 parts of the expandable...

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Abstract

A method for preparing phenolic resin foam modified by cyanate-based resin, relates to a method for preparing resin foam, and consists of the following parts: phenolic compound, aldehyde compound, modifier, catalyst, surfactant and foaming agent. It is added by cyanate-based thermoplastic phenolic resin as a modifier in the foaming process of expandable phenolic resin, so it has excellent heat resistance, low water absorption, internal toughening effect, and low moisture content, which is beneficial Improve the closed cell rate and have excellent mechanical properties. The modified phenolic resin foam has the characteristics of low thermal conductivity, good heat resistance, high closed cell rate, good dimensional stability and excellent mechanical properties. It can be widely used in building heat insulation, heat preservation, fireproof interior and exterior wall panels, central air-conditioning duct insulation materials, and aerospace and other fields.

Description

technical field [0001] The invention relates to a preparation method of resin foam, in particular to a preparation method of cyanate-based resin-modified phenolic resin foam. Background technique [0002] Phenolic foam is a new type of fire-resistant, fire-resistant and low-smoke thermal insulation material. It is a closed-cell rigid foam made of phenolic resin with flame retardant, smoke suppressant, foaming agent, curing agent and other additives. Its most prominent features are flame retardant, low smoke, and high temperature disparity resistance. Phenolic foam has rich sources of raw materials, low price, simple production and processing, and wide range of products. However, the poor toughness of phenolic foam and the high open cell ratio of the foam limit its application. [0003] Cyanate-based phenolic resin is a phenolic resin derivative formed by novolac resin as the backbone, and the phenolic hydroxyl group is replaced by a cyanate functional group. Under the acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/10C08L61/14C08J9/14
CPCC08J9/141C08J2203/14C08J2361/06C08J2461/14C08L61/06C08L2201/08C08L2203/14C08L61/14
Inventor 葛铁军王成城王佳唐恺鸿徐志华
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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