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Adhesion promoter for rubber and its preparation method and application

An adhesion promoter and rubber technology, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of high cost, difficult production technology, difficult to sublime, etc., to reduce the dosage and reduce the amount of raw materials. , The effect of not easy to sublime

Active Publication Date: 2017-10-13
RACHEM CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although resorcinol resin reduces the vapor pressure of resorcinol and is not easy to sublimate, the production technology of this resin is relatively difficult, and there are certain requirements for equipment and high cost

Method used

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  • Adhesion promoter for rubber and its preparation method and application
  • Adhesion promoter for rubber and its preparation method and application
  • Adhesion promoter for rubber and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 110 grams of resorcinol and 300 grams of anhydrous methanol into a 500 mL four-neck flask protected by nitrogen gas, heat up to 70 degrees to completely dissolve and start stirring, and slowly add 27 grams of sodium methoxide. Reflux for 10 minutes after the addition, stand to separate the layers, filter off the solvent and wash to pH=6.5-7. Add 200 grams of anhydrous tetrahydrofuran and raise the temperature to 100 degrees, then slowly add 140 grams of crushed anhydrous cobalt sulfate, keep stirring for 30 minutes after the addition, and remove the solvent at normal pressure to 120 degrees to start vacuum distillation. The residue was vacuum-dried and cooled to room temperature under the protection of nitrogen to obtain 151.9 g of dark reddish-brown powder. After identification, the product is a reddish-brown powder, and there are characteristic absorption peaks of benzene ring (1500cm-1, 1600cm-1) and phenolic hydroxyl characteristic absorption peaks (3200cm-1) th...

Embodiment 2

[0037] Add 55 grams of resorcinol and 100 grams of anhydrous tetrahydrofuran into a 500 mL four-neck flask protected by nitrogen, heat up and start stirring, slowly add 25 grams of potassium acetate, continue the reaction for 30 minutes, and let it stand to adjust the pH=6.5-7. The intermediate product was continuously reacted with 62.5 grams of nickel acetate, and after a large amount of salt was precipitated, it was suction filtered and washed three times with anhydrous methanol. Vacuum dried for 0.5 hour, and cooled to room temperature under nitrogen protection to obtain about 75 g of the product. After identification, the product is gray powder, and there are characteristic absorption peaks of benzene ring (1500cm-1, 1600cm-1) and phenolic hydroxyl characteristic absorption peaks (3200cm-1) through infrared test. After elemental analysis, C: 51.9%, H: 3.5%, Co: 21.1%, namely the chemical structure of the product:

[0038]

Embodiment 3

[0040] Add 55 grams of resorcinol and 100 mL of absolute ethanol into a 500 mL four-neck flask protected by nitrogen. Start stirring and heat up to 70 degrees for complete dissolution, slowly add 60 grams of crushed cobalt acetate. Hold for 0.5 hours after addition. Add 300 mL of concentrated ammonia water, keep at 80°C for 5 hours, filter the precipitate and wash it with ethanol until neutral, and gradually cool to room temperature under the protection of nitrogen to obtain 73 g of the product. After identification, the product is a reddish-brown powder, and there are characteristic absorption peaks of benzene ring (1500cm-1, 1600cm-1) and phenolic hydroxyl characteristic absorption peaks (3200cm-1) through infrared testing. After elemental analysis, C: 51.0%, H: 3.3%, Co: 21.0%, namely the chemical structure of the product:

[0041]

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Abstract

The invention discloses a multifunctional adhesion accelerator for rubber represented by formula (I), which contains 15% to 25% of metal ions and 0% to 9% of resorcinol. The invention also discloses a preparation method of the adhesion promoter for multifunctional rubber and its application in rubber products. The adhesion promoter of the invention has the functions of methylene acceptor and cobalt salt adhesion promoter simultaneously in the adhesion of rubber and skeleton material, the usage amount is reduced, and the efficiency is improved.

Description

technical field [0001] The invention relates to the field of synthesis of multifunctional adhesion promoters, in particular to a rubber adhesion promoter and its preparation method and application. Background technique [0002] At present, the materials used in the rubber industry for bonding rubber and skeleton materials are m-cobalt or m-formaldehyde composed of resorcinol or resorcinol resin and organic acid cobalt such as cobalt neodecanoate or cobalt naphthenate. -White-cobalt and other systems. Because resorcinol is easy to sublimate, it often releases a large amount of toxic volatiles into the atmosphere during use, which brings harm to the environment and workers' health. Although resorcinol resin reduces the vapor pressure of resorcinol and is not easy to sublimate, the production technology of this resin is relatively difficult, which requires certain equipment and high cost. The use of cobalt salts in the rubber industry has transitioned from inorganic cobalt to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/138C07C39/235C07C37/66C08L7/00
Inventor 邵明月
Owner RACHEM CHINA CO LTD
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