Long-acting anti-aging agent as well as preparation method and application thereof
An anti-aging agent and long-acting technology, which is applied in the field of long-acting anti-aging agents and its preparation, can solve the problems of shortening the protective effect duration of anti-aging agents, migration and volatilization of anti-aging agents, and deterioration of the appearance of rubber products, so as to increase the protection effect, prevention of migration and volatilization, effect of increasing molecular weight
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[0029] The invention provides a kind of preparation method of long-acting antiaging agent, comprises the following steps:
[0030] Refined lignin, phenol and p-phenylenediamine are subjected to condensation reaction under the conditions of organic auxiliary agent, catalyst and water to obtain long-acting antiaging agent.
[0031] In the present invention, the preparation method of the refined lignin preferably includes the following steps:
[0032] Activating lignin to obtain activated lignin;
[0033] The activated lignin is refined to obtain refined lignin.
[0034] In the present invention, lignin is preferably activated to obtain activated lignin. In the present invention, there is no special requirement on the type of lignin, and the lignin well-known to those skilled in the art can be used. In an embodiment of the present invention, the lignin is specifically coniferous lignin, broad-leaved lignin or grass lignin.
[0035] Before the activation, the present invention...
Embodiment 1
[0058] Dissolve 50 g of coniferous lignin with 200 mL of NaOH solution with a concentration of 1 mol / L, and adjust the pH to 13 by continuously adding sodium hydroxide solution dropwise, stir at room temperature for 15 min at a stirring speed of 400 r / min, filter with suction, and collect the filtrate to obtain lignin solution;
[0059] 259g of lignin solution was ultrasonically oscillated for 15min, the ultrasonic oscillating power was 80W, the temperature was 20°C, and then 1mol / L HCl solution was added until the pH value of the solution reached 3, stirred for 5min at a stirring speed of 400r / min, filtered and collected Precipitate to obtain activated lignin;
[0060] Add 35g of activated lignin to a mixed solution of 90g of pyridine, 10g of glacial acetic acid and 40g of water (the mass ratio of pyridine, glacial acetic acid and water is 9:1:4), and stir at a stirring speed of 500r / min until completely dissolved , add 91g chloroform, wherein, the mass ratio of activated li...
Embodiment 2
[0065] Dissolve 50g of coniferous lignin with 200mL of NaOH solution with a concentration of 1mol / L, and adjust the pH to 14 by continuing to add the above sodium hydroxide solution dropwise, stir at room temperature for 20min at a stirring speed of 400r / min, filter with suction, and collect the filtrate Obtain lignin solution;
[0066] 259g of lignin solution was ultrasonically oscillated for 10min at a power of 100W and a temperature of 25°C, then 1mol / L HCl solution was added until the pH value of the solution reached 4, stirred for 5min at a stirring speed of 500r / min, filtered and collected Precipitate to obtain activated lignin solid;
[0067] Add 35g of activated lignin solids to a mixed solution of 90g of pyridine, 10g of glacial acetic acid and 40g of water (the mass ratio of pyridine, glacial acetic acid and water is 9:1:4), and stir at a stirring speed of 500r / min until complete Dissolve, add 91g chloroform, wherein, the mass ratio of activated lignin solid, mixed ...
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