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A method for continuous production of expandable phenolic resin

A phenolic resin and expandable technology, which is applied in the field of continuous production of expandable phenolic resin, can solve the problems of high heat generation, difficult to control, and reduce the efficiency of phenolic resin, and achieve the effect of improving efficiency, fine foam and good toughness.

Inactive Publication Date: 2016-01-27
XINJIANG MAX TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current raw material for the production of phenolic resin is mostly liquid formaldehyde with a content of 37%, and there are many problems in the production process: (1) to produce expandable phenolic resin with a content of 37% formaldehyde, to produce 1 ton of resin, it needs to produce about 400 ~450kg of wastewater
(2) The process of producing expandable phenolic resin with 37% formaldehyde has a process of dehydration, and the dehydration time of a 10-ton reactor is about 3 to 4 hours, which greatly reduces the efficiency of producing phenolic resin
[0003] Using 96% paraformaldehyde instead of 37% formaldehyde to synthesize phenolic resin can effectively solve the above two problems, but 96% paraformaldehyde synthesizes phenolic resin, which has a large calorific value and is difficult to control, which has become the primary problem to be solved , the present invention just solves this problem very well

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for continuously producing expandable phenolic resins. The expandable phenolic resins are synthesized by continuously adding paraformaldehyde without generating waste water. There is no dehydration process in the synthesis process, which greatly reduces the time for synthetic resins. The following steps are specifically adopted :

[0021] (1) Prepare materials according to the following proportioning ratio and parts by weight:

[0022] Phenol 1000, mass percent are 96% paraformaldehyde 600, catalyst 20, flame retardant 40, modifier 40, wherein the catalyst used is ammonia, the flame retardant is ammonium polyphosphate, and the modifier is melamine;

[0023] (2) Phenol and catalyst are placed in the reactor, and the temperature of the reactor is controlled to be 50° C.;

[0024] (3) Connect and add paraformaldehyde in the reactor according to the formula content, control the feeding within 1 hour, and control the temperature of the reactor to be constant throug...

Embodiment 2

[0027] A method for continuously producing expandable phenolic resins. The expandable phenolic resins are synthesized by continuously adding paraformaldehyde without generating waste water. There is no dehydration process in the synthesis process, which greatly reduces the time for synthetic resins. The following steps are specifically adopted :

[0028] (1) Prepare materials according to the following proportioning ratio and parts by weight:

[0029] 1000 phenol, 96% paraformaldehyde 600, catalyst 30, flame retardant 50, modifier 50, wherein the catalyst used is triethylamine, the flame retardant is aluminum hydroxide, and the modifier is urea ;

[0030] (2) Phenol and catalyst are placed in the reactor, and the temperature of the reactor is controlled to be 60° C.;

[0031] (3) Connect and add paraformaldehyde in the reactor according to the formula content, control the feeding within 1 hour, and control the temperature of the reactor to be constant through hot water and c...

Embodiment 3

[0034] A method for continuously producing expandable phenolic resins. The expandable phenolic resins are synthesized by continuously adding paraformaldehyde without generating waste water. There is no dehydration process in the synthesis process, which greatly reduces the time for synthetic resins. The following steps are specifically adopted :

[0035] (1) Prepare materials according to the following proportioning ratio and parts by weight:

[0036] 1000 phenol, 96% paraformaldehyde 600, catalyst 40, flame retardant 60, modifier 60, wherein the catalyst used is barium hydroxide, the flame retardant is ammonium polyphosphate, and the modifier is melamine ;

[0037] (2) Phenol and catalyst are placed in the reactor, and the temperature of the reactor is controlled to be 70° C.;

[0038] (3) Connect and add paraformaldehyde in the reaction kettle according to the formula content, control the feeding within 1h, and control the temperature of the reaction kettle to be constant ...

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Abstract

The invention relates to a method for continuously producing expandable phenolic resin, the expandable phenolic resin is synthesized by continuously adding paraformaldehyde without producing waste water, the synthesis process is free from a dehydration process, and the time of synthesizing the resin is greatly reduced. Compared with the prior art, the problem that a plurality of waste water is produced due to the synthesis of the phenolic resin is solved, the resin synthesis efficiency is further improved; and meanwhile, the problems that the phenolic resin synthesized by using paraformaldehyde is great in emitted heat and the temperature control is difficult are solved; the reaction time is precisely controlled at 3h, the viscosity of the prepared phenolic resin is 5000-10000cps, the foaming curing time is 2-3 min, and the phenolic resin has the advantages of being fine and smooth in foaming body, high in strength and good in toughness.

Description

technical field [0001] The invention relates to a preparation method of a building exterior wall insulation material, in particular to a method for continuously producing expandable phenolic resin. Background technique [0002] The current raw material for the production of phenolic resin is mostly liquid formaldehyde with a content of 37%, and there are many problems in the production process: (1) to produce expandable phenolic resin with a content of 37% formaldehyde, to produce 1 ton of resin, it needs to produce about 400 ~450kg of wastewater. (2) The process of producing expandable phenolic resin with 37% formaldehyde has a process of dehydration, and the dehydration time of a 10-ton reactor is about 3 to 4 hours, which greatly reduces the efficiency of producing phenolic resin. [0003] Using 96% paraformaldehyde instead of 37% formaldehyde to synthesize phenolic resin can effectively solve the above two problems, but 96% paraformaldehyde synthesizes phenolic resin, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08K3/32C08K3/22
Inventor 杨金平薛永顺
Owner XINJIANG MAX TECH DEV
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