Method for preparing polyurethane/phenolic aldehyde foam thermal insulation material

A technology for phenolic foam and thermal insulation material, applied in the field of foam thermal insulation materials, can solve the problems of combustion problems hindering the development of polyurethane materials, general improvement of foam toughness, and inability of polyurethane to dissolve phenolic resins in each other, so as to improve the shortcomings of flammability, easy operation and pollution. small effect

Inactive Publication Date: 2009-10-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like other organic polymer materials, polyurethane is a highly flammable polymer, especially foam plastic, which has low density, large specific surface area, and good heat insulation, but the combustion problem hinders the development of polyurethane materials [Zhu Guoqiang, Dong Ming, Gu Zhihong, Development of Flame Retardant Flexible Polyurethane Foam, Polyurethane Industry, 1996(1); Xu Hongyan, Chen Su, Application Research of JS-N 350 Polyether Polyol in High Resilience Cold Curing Foam, Jinling Petrochemical, 1989(6); Su Dongliang, Li Haizhou, Huang Rushen, Qi Tianyou, Research on Flexible Polyurethane Foam Technology, Fire Protection Technology and Product Information, 1997(12)]
[0004] The toughened phenolic foam mentioned in the Chinese patent CN200

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Weigh 20 parts of phenolic resin in the container, add 2.0 parts of silicone oil (DC-193) and 1.2 parts of acetic acid in sequence, mix and stir for 1 min to make it evenly mixed to obtain component A;

[0026] 2) Weigh 30 parts of PAPI in the container, add 11 parts of polyethylene glycol-400, stir evenly, mix well, and react at 70°C for 48 minutes to obtain component B;

[0027] 3) Pour component B into component A, stir quickly, pour into a mold for foaming, and obtain a polyurethane / phenolic foam insulation material.

[0028] The obtained foam is dense and uniform, and the phenolic polyurethane has no phase separation phenomenon; foam material volume: 680cm 3 , Foam quality: 35.719g, foam density: 0.0525g / cm 3 .

Embodiment 2

[0030] 1) Weigh 10 parts of phenolic resin in the container, add 0.7 parts of Tween-60, 0.6 parts of ethylene glycol and ethanol mixture (the mass ratio of the two are 3:2) in sequence, mix and stir for 1 min to make it evenly mixed to obtain the composition Points A;

[0031] 2) Weigh 30 parts of MDI in the container, add 6 parts of polyethylene glycol-400, stir evenly, mix well, and react at 80°C for 60 minutes to obtain component B;

[0032] 3) Pour component B into component A, stir quickly, pour into a mold for foaming, and obtain a polyurethane / phenolic foam insulation material.

[0033] The obtained foam is dense and uniform, and there is no phase separation in phenolic polyurethane; foam material volume: 472cm 3 , Foam quality: 25.297g, foam density: 0.0536g / cm 3 .

Embodiment 3

[0035] 1) Weigh 20 parts of phenolic resin in the container, add 1.0 part of silicone oil (DC-193), 0.2 part of a mixture of acetic acid and petroleum ether (the mass ratio of the two is 1:1), and mix and stir for 1 min to make it uniform. Obtain component A;

[0036] 2) Weigh 30 parts of TDI in the container, add 11 parts of polyethylene glycol-400, stir evenly, mix well, and react at 75°C for 36 minutes to obtain component B;

[0037] 3) Pour component B into component A, stir quickly, pour into a mold for foaming, and obtain a polyurethane / phenolic foam insulation material.

[0038] The obtained foam is dense and uniform, and the phenolic polyurethane has no phase separation phenomenon; foam material volume: 268cm 3 , Foam quality: 36.054g, foam density: 0.1345g / cm 3 .

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Abstract

The invention provides a method for preparing a polyurethane/phenolic aldehyde foam thermal insulation material and belongs to the field of the foam thermal insulation material. The invention aims to solve the problems of poor fire resistant property and strong brittleness in the prior polyurethane foam and phenolic aldehyde foam respectively. The method comprises the following steps that: a prepolymer of alkali phenolic resin, isocyanate and polyether glycol are used as raw materials, and the prepolymer is added with a surfactant and a foaming agent for free foaming at room temperature to prepare the polyurethane/phenolic aldehyde foam thermal insulation material, wherein the weight ratio of the isocyanate to the alkali phenolic resin is 3-1:1, the consumption of the polyether glycol is 20 to 50 percent of the weight of the isocyanate, the consumption of the surface active agent is 4 to 10 percent of the weight of the alkali phenolic resin, and the consumption of the foaming agent is 1 to 10 percent of the weight of the alkali phenolic resin. The method has the advantages of the suitability for places where the foaming-in-place insulation is necessary, stable process reaction, good operability and easily bought raw materials; and the foam thermal insulation material prepared by the method has the advantages of little surface pulverization, good toughness, good fire resistant property, and the like.

Description

Technical field [0001] The invention belongs to the field of foam insulation materials, and specifically relates to a preparation method of a polyurethane / phenolic foam insulation material with high reaction efficiency, simple process, strong operability, low pollution and good toughness. Background technique [0002] Phenolic resin is a collective term for resins formed by polycondensation of phenol and aldehyde. As one of the three major synthetic thermosetting resins, it is the first synthetic resin to be developed and industrialized. Since its founder, American scientist Dr. Leo Backeland, put phenolic resin into commercial production for the first time in 1905, it has a history of one hundred years. Due to its wide source of raw materials, less complex production process and equipment, and excellent product performance, it has been widely used in many production and life fields. For example, coatings, adhesives, acid-resistant mortars, phenolic plastics, phenolic foams can b...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L61/06C08J9/04
Inventor 程珏范勇杨万泰
Owner BEIJING UNIV OF CHEM TECH
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