Thermosetting rapid curing phenolic resin and preparation method thereof

A phenolic resin and phenolic technology, which is applied in the field of thermosetting fast-curing phenolic resin and its preparation, and can solve the problems of single curing time and molding process.

Active Publication Date: 2009-03-11
北京玻钢院复合材料有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The phenolic resin produced by this method shows a faster curing speed, but it still fails to change the...

Method used

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  • Thermosetting rapid curing phenolic resin and preparation method thereof
  • Thermosetting rapid curing phenolic resin and preparation method thereof
  • Thermosetting rapid curing phenolic resin and preparation method thereof

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preparation example Construction

[0058] A specific preparation method is:

[0059] For example, a mixture of phenol and resorcinol is used as the phenolic raw material (wherein the weight percentage of resorcinol is 5 to 30%), and formaldehyde, acetaldehyde, butyraldehyde and / or a mixture thereof are used as the aldehyde raw material According to the molar ratio of phenolic raw materials and aldehyde raw materials is 1:0.5~0.8, put phenolic raw materials (excluding resorcinol) and aldehyde raw materials into the reactor, and then add divalent metal zinc salt to adjust the system The pH of the solution is 4~7, stir, slowly raise the temperature to 80~90°C and react for 40~60min; cool down to 60~80°C, add 0.8~1.5mol of aldehyde raw materials (relative to 1mol of phenolic raw materials), adjust with lye The pH value of the solution is 8-9, and the reaction is continued at 90°C for 60-80 minutes; finally, an appropriate amount of resorcinol is added to the solution system, the temperature is lowered to 60-80°C, a...

Embodiment 1

[0062] The molar ratio of phenol to aldehyde is 1:1.5, put 254kg of phenol and 146kg of formaldehyde with a concentration of 37% (weight) into the reactor, and add a zinc acetate solution with a concentration of 30% (weight) and a weight of 20kg. , stir, slowly heat up to 85-95°C, keep the reaction for 40-60min, at this time the pH value of the solution is between 4-7; add 220kg of formaldehyde, and add a sodium hydroxide solution with a concentration of 20% and a weight of 10kg , adjust the pH value of the solution between 8 and 9, control the temperature between 85 and 95°C, and continue to react for 60 to 80 minutes; then cool down to 60 to 80°C, add 16.5kg of resorcinol, and continue to keep warm React for 90 to 150 minutes, and the pH value of the solution is between 9 and 10 at this time; finally, vacuum dehydration at 45 to 75 ° C, and the gel time of the reactant is 70 to 75 s measured by the iron plate wire drawing method. Add 50kg of ethylene glycol at about 50°C, st...

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Abstract

The invention discloses thermosetting rapid setting phenolic resin and a method for preparing the same. The phenolic resin composite comprises a phenol raw material containing resorcin, an aldehyde raw material and a catalyst containing bivalent zinc salt and an alkali catalyst, wherein the weight of the resorcin against the weight of the phenol raw material is between 5 and 30 percent. For the thermosetting phenolic resin, the exothermal peak temperature is 155 DEG C, the viscosity at the room temperature(25 DEG C) is between 3, 000 and 4, 000cps, the storage period is over 2 months, and the gel time at a temperature of 150 DEG C is between 120 and 200 seconds. By adopting the thermosetting phenolic resin prepared by the invention, glass steel gratings used for platforms, floors, trench covers and the like can be prepared by utilizing the rapid forming process such as the pulling-extrusion and the like; and the glass steel gratings can be used for offshore petroleum drilling platform, and the like.

Description

technical field [0001] The invention relates to the field of macromolecular materials, and more particularly relates to a thermosetting fast-curing phenolic resin and a preparation method thereof. Background technique [0002] Phenolic resin is formed by polycondensation of phenolic compounds and aldehyde compounds under the action of a catalyst. The polycondensation reaction of thermosetting phenolic resin is generally carried out under the action of basic catalysts such as sodium hydroxide, ammonia water, barium hydroxide, calcium hydroxide, magnesium hydroxide, sodium carbonate, tertiary amine, etc. Phenolic resin has many disadvantages such as long curing time, high condensation water in the curing stage, must be cured under high temperature and high pressure, and complicated molding process, which severely limits the application of phenolic resin in the field of building structures. [0003] Chinese Invention Patent Application Publication No. CN1175597A discloses a me...

Claims

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Application Information

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IPC IPC(8): C08G8/04
Inventor 胡平陈淳刘锦霞孙超明王雷
Owner 北京玻钢院复合材料有限公司
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