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Phenolic aldehyde foam material

A phenolic foam material and phenolic resin technology, applied in the field of thermal insulation materials, can solve the problems of restricting the wide use of phenolic foam, low density of phenolic foam and high water absorption, and achieve the effects of enhancing toughness, enhancing toughness and reducing water absorption

Inactive Publication Date: 2013-05-01
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The expandable lignin-based phenolic resin is introduced into the phenolic foam of the above-mentioned patent, but the density of the phenolic foam prepared by the above-mentioned method is low, the strength is low, and the water absorption rate is high, thereby limiting the wide use of the phenolic foam

Method used

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  • Phenolic aldehyde foam material
  • Phenolic aldehyde foam material
  • Phenolic aldehyde foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] With the lignin modified phenolic resin of 100 weight parts and the cyclopentane of 8 weight parts, the polysiloxane of 6 weight parts, the polyester polyol of 8 weight parts and epoxy resin mixture (polyester polyol and epoxy resin The mass ratio of resin is 1:1), 15 parts by weight of triphenyl phosphate and 25 parts by weight of curing agent (the mass ratio of xylene sulfonic acid, glycerol and water is 7:2:1), stir and mix well , quickly poured into a 32×32×4cm mold preheated at 70°C for foaming, and cured at 70°C for 30 minutes to obtain lignin-modified phenolic foam A-1, and its performance indicators are listed in Table 1. figure 1 and figure 2 Electron scanning photo of the phenolic foam prepared in Example 1 of the present invention. Depend on figure 1 and figure 2 It can be seen that the average cell size of the phenolic foam is 60 μm, and the cells have good integrity.

Embodiment 2

[0056] With the lignin modified phenolic resin C of 100 weight parts and the cyclopentane of 8 weight parts, the polysiloxane of 6 weight parts, the polyester polyol of 8 weight parts and epoxy resin mixture (polyester polyol and cyclopentane The mass ratio of oxygen resin is 1:1), 15 parts by weight of triphenyl phosphate and 25 parts by weight of curing agent (the mass ratio of xylenesulfonic acid, glycerin and water is 7:2:1) stirring and mixing Evenly and quickly pour it into a 32×32×4cm mold preheated at 55°C for foaming, and cure at 55°C for 30 minutes to obtain lignin-modified phenolic foam C-1, and its performance indicators are listed in Table 1.

Embodiment 3

[0058] With the lignin modified phenolic resin C of 100 weight parts and the cyclopentane of 8 weight parts, the polysiloxane of 6 weight parts, the polyester polyol of 8 weight parts and epoxy resin mixture (polyester polyol and cyclopentane The mass ratio of oxygen resin is 1:1), 15 parts by weight of triphenyl phosphate and 25 parts by weight of curing agent (the mass ratio of xylenesulfonic acid, glycerin and water is 7:2:1) stirring and mixing Evenly and quickly pour it into a 32×32×4cm mold preheated at 85°C for foaming, and cure at 90°C for 30 minutes to obtain lignin-modified phenolic foam C-2, and its performance indicators are listed in Table 1. as attached figure 2 as shown, figure 2 Electron scanning photo of the phenolic foam prepared in Example 3 of the present invention. Depend on figure 2 It can be seen that there are cell defects on the cells of the phenolic foam.

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Abstract

The invention provides a phenolic aldehyde foam material which is obtained by foaming and curing a phenolic resin mixture. The phenolic resin mixture comprises the following components in parts by weight: 90-100 parts of lignin modified phenolic resin, 4-8 parts of surfactant, 8-10 parts of flexibilizer, 6-8 parts of foaming agent, 15-25 parts of fire retardant and 25-30 parts of curing agent. The flexibilizer is a mixture of one or more out of glycol, polyethylene glycol, polyvinyl alcohol and polyester polyol with one or more out of nitrile rubber, polyurethane prepolymer and epoxy resin. The curing agent is a mixture of acid, alcohol and water at a mass ratio of (5-7):(1-3):(1-3). According to the phenolic aldehyde foam material, as the special flexibilizer and the curing agent are introduced, the phenolic resin material has higher toughness, density and strength and lower water absorption.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a phenolic foam material. Background technique [0002] Phenolic foam is a kind of foam plastic obtained by foaming phenolic resin. Because phenolic foam has the characteristics of light weight, good dimensional stability, chemical corrosion resistance, flame penetration resistance, no dripping in case of fire, low smoke and excellent performance in flame retardancy, it has become a popular choice in construction, petrochemical, electrical appliances It is an ideal thermal insulation material for industries such as instrumentation and instrumentation. At present, phenolic foam has become one of the fastest-growing types of foam plastics, and researchers are very active in its research and development. However, the existing phenolic foams have problems of poor toughness, low strength and high water absorption. [0003] Lignin is a natural polymer. Its molecu...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08L71/08C08L29/04C08L67/00C08L9/02C08L75/04C08L63/00C08K13/02C08K5/053C08K3/16C08K3/30C08K3/32C08K5/42C08K5/06C08J9/04C08J3/24
Inventor 江成真李枝芳焦壮秦海洋左兴信韩春国彭绵广
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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