Preparation method of hollow glass microbead-reinforced phenolic foam composite material

A glass microbead and phenolic foam technology, applied in the field of foaming materials, can solve the problems of insignificant improvement of phenolic foam strength, limited use of phenolic foam, brittleness of phenolic foam, etc., so as to improve rheological properties and crystallization behavior, stabilize foam Pore ​​size, effect of increasing compressive strength

Active Publication Date: 2013-05-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional phenolic foam has shortcomings such as brittleness, fragility, and low strength, which limits the use of traditional phenolic foam.
In terms of phenolic resin modificatio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Formula: 94 parts of phenol, 120 parts of 37% formaldehyde solution, 2 parts of 20% sodium hydroxide solution, 5.5 parts of hollow glass microspheres (the molar ratio of phenol, formaldehyde and hydroxide ion is 1:1.5:0.01) ; The above resin synthesis formula can obtain 110 parts of resin.

[0031] 4 parts of surfactant DC-193, 5 parts of foaming agent n-pentane, 1 part of nano-nucleating agent nano-talc powder, 4 parts of acidic curing agent for p-toluenesulfonic acid and phosphoric acid compound system (1:1:2) .

[0032] making process:

[0033] 1) Slowly add heated and melted phenol, 37% formaldehyde solution, hollow glass microspheres and basic catalyst into the three-necked flask at 20~50°C according to the formula, stir at high speed for 10 minutes to mix evenly; continue to slowly heat up to 60°C, maintain the reaction temperature for 1h; continue to heat up to 90°C, keep the reaction at this temperature for 2h, stop the reaction, cool down to room temperature ...

Embodiment 2

[0037] Formula: 94 parts of phenol, 145 parts of 37% formaldehyde solution, 10 parts of 20% sodium hydroxide solution, 11 parts of hollow glass microspheres (the molar ratio of phenol, formaldehyde and hydroxide ion is 1:1.8:0.05) ; The above resin synthesis formula can obtain 110 parts of resin.

[0038] 6 parts of surfactant DC-193, 10 parts of foaming agent n-pentane, 1.5 parts of nano-nucleating agent nano-talcum powder, 6 parts of acidic curing agent for p-toluenesulfonic acid and phosphoric acid compound system (1:0.5:1) .

[0039] making process:

[0040] 1) Slowly add heated and melted phenol, 37% formaldehyde solution, hollow glass microspheres and basic catalyst into the three-necked flask at 20~50°C according to the formula, stir at high speed for 10 minutes to mix evenly; continue to slowly heat up to 70°C, maintain the reaction temperature for 1h; continue to heat up to 95°C, keep the reaction at this temperature for 2h, stop the reaction, cool down to room temper...

Embodiment 3

[0044] Formula: 94 parts of phenol, 160 parts of 37% formaldehyde solution, 20 parts of 20% sodium hydroxide solution, 16.5 parts of hollow glass microspheres (the molar ratio of phenol, formaldehyde and hydroxide ion is 1:2.0:0.1) ; The above resin synthesis formula can obtain 110 parts of resin.

[0045] 8 parts of surfactant DC-193, 15 parts of foaming agent n-pentane, 2 parts of nano-nucleating agent nano-talc powder, 8 parts of acidic curing agent for the compound system of p-toluenesulfonic acid and phosphoric acid (1:0.5:1) .

[0046] making process:

[0047] 1) Slowly add heated and melted phenol, 37% formaldehyde solution, hollow glass microspheres and basic catalyst into the three-necked flask at 20~50°C according to the formula, stir at high speed for 10 minutes to mix evenly; continue to slowly heat up to 60°C, maintain the reaction temperature for 1h; continue to heat up to 90°C, keep the reaction at this temperature for 2h, stop the reaction, cool down to room ...

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PUM

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Abstract

The invention discloses a preparation method of a hollow glass microbead-reinforced phenolic foam composite material, belonging to the field of foam materials. The preparation method comprises the following steps: copolymerizing phenol and formaldehyde serving as comonomers and hollow glass microbeads serving as reinforcing materials so as to get modified A-stage phenolic resin in the presence of an alkaline catalyst; and further mixing the A-stage phenolic resin with a surfactant, a foaming agent, a nano-nucleating agent and an acid curing agent according to a formula, adding into a mold, and performing hot-pressing, foaming and molding to prepare the hollow glass microbead-reinforced phenolic foam. According to the preparation method disclosed by the invention, by reinforcing the hollow glass microbeads, the compressive strength, the bending strength and the impact strength of the phenolic foam are improved; the bubble hole structure of the phenolic foam is improved, the bubble hole size is reduced; and bubble holes are more uniform; and the fire resistance of the phenolic foam can not be reduced. The prepared foam can be applied to high-tech technical fields of aerospace, high-speed trains, building heat insulation, ships and the like.

Description

technical field [0001] The invention belongs to the field of foam materials, and in particular relates to a method for preparing a hollow glass microsphere-reinforced phenolic foam composite material. Background technique [0002] In recent years, with the rapid development of society, the number of high-rise buildings has increased, which has also led to frequent occurrence of fire incidents in high-rise buildings, which has caused a huge threat to people's lives and property safety. Obviously, polyurethane, polystyrene, polychlorinated Traditional thermal insulation foam materials such as ethylene, which are common in the market, can no longer meet the needs of social development due to their shortcomings such as flammability, large smoke generation, and the generation of toxic gases when the foam is burned. Phenolic foam has become one of the fastest growing varieties of foam plastics because of its incomparable advantages over other foam plastics. [0003] Phenolic foam...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08L61/10C08K7/28C08K3/26C08K3/34C08K3/36C08G8/10
Inventor 姚正军陈永鑫周金堂
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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