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Preparation method of high temperature resistance phenolic resin binder

A technology of phenolic resin and binder, which is applied in the field of phenolic resin preparation, can solve problems such as poor high temperature resistance, and achieve the effects of increasing thermal decomposition temperature, inhibiting chain scission, and increasing the carbon residue rate of resin

Inactive Publication Date: 2018-01-30
许水仙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a preparation method of high temperature resistant phenolic resin binder for the defect of poor high temperature resistance of phenolic resin binder

Method used

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  • Preparation method of high temperature resistance phenolic resin binder

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Effect test

example 1

[0020] Weigh 400g of magnesite ore, put the magnesite ore into a stone grinder and grind for 2 hours to obtain magnesium ore particles with a particle size of 1mm, put the magnesium ore particles into a calciner, heat up to 700°C, and heat-preserve and calcinate for 8 hours , to obtain light-burned magnesia ore, put light-burned magnesia ore into a mortar and grind for 2 hours, pass through a 100-mesh standard sieve to obtain sieved magnesium ore powder; weigh 200g of molybdenite ore and put it in a high-temperature furnace, and put it into a high-temperature furnace under the condition of introducing air , heat up to 200°C, heat-preserve and roast for 3 hours to obtain roasted molybdenite, pour the roasted molybdenite into a beaker, soak and roast the molybdenite with 300mL of ammonia water with a mass fraction of 40% for 4 hours, and obtain a mixed solution. Adjust the pH value of the mixed liquid in the beaker to 40% nitric acid solution to 6.5, filter and remove the filtrat...

example 2

[0022] Weigh 450g of magnesite ore, put the magnesite ore into a stone grinder and grind for 2.5h to obtain magnesium ore particles with a particle size of 2mm, put the magnesium ore particles into a calciner, heat up to 750°C, and heat-preserve and calcinate for 9h Finally, light burnt magnesia ore is obtained, put the light burnt magnesia ore into a mortar and grind for 2.5 hours, pass through a 100-mesh standard sieve to obtain sieved magnesium ore powder; weigh 250g of molybdenite ore and put it into a high temperature furnace, Under certain conditions, heat up to 225°C, heat-preserve and roast for 4 hours to obtain roasted molybdenite, pour the roasted molybdenite into a beaker, soak and roast the molybdenite with 350 mL of ammonia water with a mass fraction of 40% for 5 hours, and obtain a mixed solution. The nitric acid solution with a mass fraction of 40% adjusted the pH value of the mixed solution in the beaker to 6.7, filtered and removed the filtrate to obtain a filt...

example 3

[0024]Weigh 500g of magnesite ore, put the magnesite ore into a stone grinder and grind for 3 hours to obtain magnesium ore particles with a particle size of 3mm, put the magnesium ore particles into a calciner, heat up to 800°C, and heat-preserve and calcinate for 10 hours , to obtain light-burned magnesia ore, put the light-burned magnesia ore into a mortar and grind for 3 hours, pass through a 100-mesh standard sieve to obtain sieved magnesia ore powder; weigh 300g of molybdenite ore and put it in a high-temperature furnace, , heat up to 250°C, heat-preserve and roast for 5 hours to obtain roasted molybdenite, pour the roasted molybdenite into a beaker, soak and roast the molybdenite with 400mL ammonia water with a mass fraction of 40% for 6 hours, and obtain a mixed solution. Adjust the pH of the mixture in the beaker to 7.0 for 40% nitric acid solution, filter the filtrate to obtain the filter residue, wash the filter residue with deionized water for 5 times, put the washe...

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Abstract

The invention discloses a preparation method of a high temperature resistance phenolic resin binder, and belongs to the technical field of phenolic resin. After a light yellow powder containing molybdic acid and molybdenum salt is subjected to chemical reaction, transition metal molybdenum is bonded to a phenolic resin molecule main chain in a chemical bond manner, so that an O-Mo-O structure connected benzene ring is formed, and as energy for bond breaking in thermal decomposition is high, thermal decomposition temperature of the phenolic resin binder is increased. Magnesite mineral powder and boric acid can produce whiskers during reaction, magnesium oxide with the melting point reaching 2000 DEG C after the whiskers leaveare ablated, the fact that the internal structure of phenolic resin is further destroyed by high temperature is prevented, cation of the transition metal molybdenum has an obvious electron-deficient property, free radical produced in cleavage reaction at high temperature can be captured, chain scission is restrained, the carbon residual ratio of the resin is increased, and the preparation method is beneficial to the framework retaining of the resin structure, sothat the purpose of high temperature resistance is achieved.

Description

technical field [0001] The invention relates to the technical field of phenolic resin preparation, in particular to a preparation method of a high temperature resistant phenolic resin binder. Background technique [0002] Phenolic resin, also called Bakelite, is a resin made by polycondensation of phenol and formaldehyde under catalyst conditions, neutralization, and water washing, among which phenol and formaldehyde resin are the most important. Solid phenolic resin is a yellow, transparent, amorphous blocky substance, reddish due to free phenol, the average specific gravity of the entity is about 1.7, easily soluble in alcohol, insoluble in water, stable to water, weak acid and weak alkali solution. It is a resin made by polycondensation of phenol and formaldehyde under catalyst conditions, neutralization and washing with water. It is also the world's first artificially synthesized polymer material that is still very important today. Due to the choice of catalyst, it can...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08G8/10
Inventor 陈友宝何俊欣张淑娴
Owner 许水仙
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