Preparation method of halogen-free environmental-friendly synergistic flame retardant phenolic foam composite material

A technology of synergistic flame retardant and phenolic foam, applied in the field of preparation of flame retardant composite materials, can solve the problems of increased environmental burden and production cost, complex production process, difficult to control resin properties, etc. , the effect of low cost

Active Publication Date: 2012-12-26
重庆集凯科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the flame-retardant modification of phenolic foam, such as a phenolic foam production process that can improve flame-retardant performance (200610031339.3) and high flame-retardant phenolic foam resin and its production method (200910000833.7); both patents are Adding flame retardant in the process of preparing phenolic resin, the production process is complicated, the resin performance is difficult to control, and the latter patented resin needs to be dehydrated before being used for foaming, which increases the environmental burden and production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a. Synthesis of expandable high-solid phenolic resin

[0032] In the first step, add 100 parts of phenol, 20 parts of 37% (wt) formaldehyde solution and 0.3 parts of calcium oxide into the reaction vessel, and react at 85°C for 30 minutes; in the second step, add in 4 batches to the above reaction solution 35 parts of paraformaldehyde and 8 parts of 50% (wt) NaOH solution were added in 4 times and reacted at 85°C for 60 minutes; the third step was to add 35 parts of paraformaldehyde and 8 parts of 50 % (wt) NaOH solution, both were added in 5 steps, and co-condensed at 80°C for 50 minutes; the fourth step, adding 4 parts of 50% (wt) NaOH solution, and co-condensed at 75°C for 15 minutes Minutes, after cooling, the material is discharged to obtain an expandable low-viscosity phenolic resin, and the resin viscosity is 2950mpa·s.

[0033] b. Preparation of halogen-free and environmentally friendly synergistic flame-retardant phenolic foam composites

[0034] Add 4 parts ...

Embodiment 2

[0036] a. Synthesis of expandable high-solid phenolic resin

[0037] In the first step, add 100 parts of phenol, 25 parts of 37% (wt) formaldehyde solution and 0.2 parts of calcium oxide into the reaction vessel, and react at a temperature of 85°C for 30 minutes; in the second step, add the above reaction solution in 4 batches 27.5 parts of paraformaldehyde and 6 parts of 50% (wt) NaOH solution, both were added in 4 times, and reacted at 90 °C for 70 minutes; the third step was to add 27.5 parts of paraformaldehyde and 6 parts of 50 % (wt) NaOH solution, co-condensation reaction at 80°C for 50 minutes; the fourth step, add 3 parts of 50% (wt) NaOH solution, co-condensation reaction at 70°C for 20 minutes, and discharge after cooling It is a low-viscosity phenolic resin with a viscosity of 2100mpa·s.

[0038] b. Preparation of halogen-free and environmentally friendly synergistic flame-retardant phenolic foam composites

[0039] Add 4 parts of 85%wt phosphoric acid, 4 parts o...

Embodiment 3

[0041] a. Synthesis of expandable high-solid phenolic resin

[0042]In the first step, add 100 parts of phenol, 30 parts of 37% (wt) formaldehyde solution and 0.1 part of calcium oxide into the reaction vessel, and react at 85°C for 30 minutes; in the second step, add in 4 batches to the above reaction solution 20 parts of paraformaldehyde and 4 parts of 50% (wt) NaOH solution were added in 4 times and reacted at 80°C for 50 minutes; the third step was to add 20 parts of paraformaldehyde and 4 parts of 50 % (wt) NaOH solution, polycondensation reaction at 90°C for 70 minutes; the fourth step, add 2 parts of 50% (wt) NaOH solution, polycondensation reaction at 80°C for 15 minutes, and discharge after cooling It is a low-viscosity phenolic resin with a viscosity of 1500mpa·s.

[0043] b. Preparation of halogen-free and environmentally friendly synergistic flame-retardant phenolic foam composites

[0044] Add 4 parts of 85%wt phosphoric acid, 4 parts of Tween-80 and 4 parts of ...

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Abstract

The invention relates to a preparation method of a halogen-free environmental-friendly synergistic flame retardant phenolic foam composite material. The preparation method comprises the synthesis process of expandable low-viscosity phenolic resin by using phenol, formaldehyde solution, paraformaldehyde, calcium oxide and alkali catalyst, and the preparation process of the halogen-free environmental-friendly synergistic flame retardant phenolic foam composite material, wherein the synthesis process of expandable low-viscosity phenolic resin comprises the following steps of: 1) adding the phenol, the formaldehyde solution and the calcium oxide into a reaction container, 2) adding a first batch of paraformaldehyde and alkali catalyst into the reaction solution, 3) adding the remaining paraformaldehyde and a second batch of alkali catalyst, and 4) adding the remaining alkali catalyst, cooling and discharging the materials to obtain the expandable low-viscosity phenolic resin; and the preparation process of the halogen-free environmental-friendly synergistic flame retardant phenolic foam composite material comprises the following steps of: taking the expandable low-viscosity phenolic resin, adding surfactant, composite curing agent, halogen-free environmental-friendly flame retardant, carbonizing agent and synergist, evenly agitating, finally adding physical foaming agent, evenly agitating the mixture and foaming, curing and molding the mixture to obtain the product. The preparation method has the advantages of simple process, high product stability and wide application scope.

Description

technical field [0001] The invention belongs to the field of preparation of flame-retardant composite materials, and in particular relates to a halogen-free environmentally friendly synergistic flame-retardant phenolic foam composite material and a preparation method thereof. Background technique [0002] In recent years, fire accidents have occurred frequently. The reason is the poor fire resistance of materials and the release of toxic smoke. Therefore, the governments of various countries have put forward more stringent standards on the flame retardancy and low smoke emission of foamed plastics in the fields of construction and transportation. requirements. Compared with polyethylene and polyurethane foam, phenolic foam has the advantages of flame retardant, self-extinguishing, low smoke, low toxicity, flame penetration resistance, etc., and has less impact on the environment. Therefore, phenolic foam, as the third generation thermal insulation material, has gradually at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08L61/10C08K3/32C08G8/10
Inventor 储富祥马玉峰王春鹏许玉芝金立维陈日清张伟
Owner 重庆集凯科技服务有限公司
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