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Modified phenolic resin and rigid foamed plastic and preparation method thereof

A technology of rigid foam plastics and phenolic resins, applied in the field of modified phenolic resins, rigid foam plastics and manufacturing methods, can solve the problems that cannot be used as thermal insulation, cold insulation, moisture-proof, sound insulation materials, etc., and achieve good anti-extinguishing performance, Reduce damage, non-flammable effect

Inactive Publication Date: 2012-07-11
王福伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing phenolic resins are mainly used to create phenolic hard plastics, and cannot be used as thermal insulation, cold insulation, moisture-proof, and sound-proof materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The components of modified phenolic resin are phenol: 26%, formaldehyde: 70%, sodium hydroxide: 3%, oxalic acid: 0.5%, grease 0.5%

[0034] The composition of the rigid foam prepared by modified phenolic resin is as follows:

[0035] Phenolic resin 70%, silicone oil 10%, chloropropane 5%, hydrochloric acid 5%, water 10%

[0036] a. Preheat the phenol to 60°C, after it is completely dissolved, when the reactor is heated to 70°C, use a vacuum pump to suck phenol, formaldehyde, sodium hydroxide, and additives into the reactor, and then add the catalyst oxalic acid;

[0037] b. After feeding, put the cooling water into the condenser, heat the material to 65°C under stirring, and carry out the condensation reaction in the reactor. , The reaction time is 3 hours, and the amount of dehydration in the reaction stage is 50 liters / hour.

[0038] c. Lower the temperature of the material to below 60°C and above 50°C, add oxalic acid to carry out neutralization reactio...

Embodiment 2

[0043] The composition of modified phenolic resin is phenol: 48.3%, formaldehyde: 50%, sodium hydroxide: 1%, oxalic acid: 0.4%, and oil additives 0.3%.

[0044] The composition of the rigid foam prepared by modified phenolic resin is as follows:

[0045] Phenolic resin 77%, silicone oil 15%, chloropropane 2%, hydrochloric acid 1%, water 5%

[0046] a. Preheat the phenol to 60°C, after it is completely dissolved, when the reactor is heated to 75°C, use a vacuum pump to suck phenol, formaldehyde, sodium hydroxide, and additives into the reactor, and then add the catalyst oxalic acid;

[0047] b. After feeding, put the cooling water into the condenser, heat the material to 65°C under stirring, and carry out the condensation reaction in the reactor. , The reaction time is 3 hours, and the amount of dehydration in the reaction stage is 50 liters / hour.

[0048] c. Lower the temperature of the material to below 60°C and above 50°C, add oxalic acid to carry out neutraliz...

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PUM

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Abstract

The invention disclose a modified phenolic resin, prepared from phenol, formaldehyde, sodium hydroxide, oxalic acid catalyst and grease assistant. A rigid foamed plastic prepared by using the modified phenolic resin is prepared from phenolic resin, silicone oil surfactant, water, chlorinated hydrocarbon foaming agent and hydrochloric acid catalyst. The preparation method of the above materials comprises the steps of charging, comprehensive reaction, neutralization, dehydration, mixing, foaming, molding, and curing. Compared with polyurethane materials, the rigid foamed plastic has the characteristics of no toxicity and pollutant, non-flammable property, low cost, and good heat preservation and cold preservation performances, and is suitable for heat preservation of various pipelines, cold preservation of cold storage, indoor sound insulation, and moisture-proof engineering and the like.

Description

technical field [0001] The invention relates to a modified phenolic resin, a rigid foam plastic and a preparation method. Background technique [0002] Existing heat-preserving, cold-preserving, moisture-proof, and sound-insulating materials include expanded perlite, expanded vermiculite, calcium silicate, polystyrene foam, and the like. At the end of the 1930s, polyurethane rigid foam came out and became a widely used thermal insulation and cold insulation material. The weakness of this material is that it is flammable, has poor temperature resistance, high cost, and contains harmful substances to the human body. Environmental organizations have made it clear that all production and use of fluoride will be stopped before 2000. Therefore, research on replacement products has become the requirement of the times. Existing phenolic resins are mainly used to create phenolic duroplastics, and cannot be used as thermal insulation, cold insulation, moisture-proof, and sound-insul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/32C08L61/14C08J9/14
Inventor 王福伟
Owner 王福伟
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