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Production method of phenol formaldehyde resin used for normal temperature continuous casting and foaming and resin made by said method

A technology of phenolic resin and production method, which is applied in the production field of phenolic resin, can solve the problems of unsuitable normal temperature foaming process, high resin viscosity, and no phenolic resin has been seen yet, and achieve good cost-effectiveness ratio, economic and social benefits, The effect of reliable bonding

Inactive Publication Date: 2004-08-04
孙维钧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing synthesis technology, shortening the gelation time of the resin can improve the activity of the phenolic resin, but the problems brought about are: (1) The storage stability of the resin is greatly reduced, and some can only be stored for one week without adding a curing agent , which can self-gel
(2) The viscosity of the resin is too high (more than 2.5Pa·S), it is difficult to construct, and the foam pores are not uniform
However, the high-ortho phenolic resins for this purpose are generally alcohol-soluble or solid, and this resin is not suitable for normal temperature foaming process
So there is no report on the phenolic resin used for continuous casting at room temperature so far.

Method used

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  • Production method of phenol formaldehyde resin used for normal temperature continuous casting and foaming and resin made by said method
  • Production method of phenol formaldehyde resin used for normal temperature continuous casting and foaming and resin made by said method

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Embodiment 1 (recipe 1)

[0051] Add 100 parts of phenol and 100 parts of formaldehyde into the reaction kettle with vacuum suction stirring, reflux, heating and cooling. After stirring for 15 minutes, add 5 parts of methanol, then slowly raise the temperature to 40°C under stirring, and maintain the reaction for 30 minutes. Add CaO 3 portion, and slowly heated up with stirring for about 50 minutes until the reaction boiled. React under boiling for 1.5 hours, add 10 parts of formaldehyde to continue the reaction, and when the gelling time reaches 110s at 150°C, make the system react under reduced pressure, adjust the vacuum degree and polycondensation reaction temperature (the maximum vacuum degree is 10Kpa, and the maximum temperature is 80°C ). When the solid content reaches the target requirement, cool down to below 40°C, add 1.6 parts of A1100 and absolute ethanol solution (1:1), 2 parts of Tween 80, 1 part of triethanolamine, and 3 parts of sili...

Embodiment 2

[0052] Embodiment 2 (recipe 2)

[0053] Operation according to Example 1, CaO in the formula is replaced by Ba(OH 2 ) and MgO composite system, 100 parts of phenol, 100 parts of formaldehyde, Ba(OH) 2 1 part, 1 part of MgO, 0.5 part of triethanolamine, 0.2 part of A1100. Synthesize phenolic resin according to example 1 operation.

Embodiment 3

[0054] Embodiment 3 (recipe 3)

[0055] Operation is by example 1, only changes the proportioning of phenol and formaldehyde, increases to 100 / 130 by the ratio 100 / 105 of phenol and formaldehyde among the embodiment 1, synthesizes phenolic resin by example 1.

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Abstract

A water-soluble phenolic resin for continuous casing and foaming at ordinary temp is composed of phenol and formaldehyde through low-temp prepolycondensation reaction, heating to 95 deg.c, high-temp polycondensation reaction, medium-temp polycondensation reaction, and low-temp polycondensation reaction while adding amino organosilicon compound as reaction activity regulator. Its advantages are high foaming uniformity, and high adhesion to panel.

Description

Technical field: [0001] The invention relates to the technical field of production of phenolic resin for foaming, and more specifically relates to the production technology of continuous casting and foaming of phenolic resin at normal temperature (20-40° C.). technical background: [0002] Phenolic materials have attracted people's attention because of their good heat resistance, flame retardancy, and low smoke and non-toxic gas emissions during combustion. It has been widely used in engineering fields such as construction, heat preservation, transportation, machinery, petroleum and chemical engineering. Phenolic foam materials can generally be manufactured by thermal foaming of thermoplastic phenolic resin (Novolac), and can also be manufactured by thermosetting phenolic resin (resol). The latter can be used for medium-temperature foaming (60-80°C) and high-temperature foaming (80-120°C), as well as low-temperature foaming and room-temperature foaming. [0003] For foreig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
Inventor 孙维钧刘威孙助海
Owner 孙维钧
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