Method for preparing acetylene-modified alkylphenol formaldehyde super-tackifying resin

Abstract

The invention discloses a method for preparing acetylene-modified alkylphenol formaldehyde super-tackifying resin. The method is characterized by comprising the following steps: firstly of all, alkylphenol and formaldehyde are adopted to react by taking oxalic acid as a catalyst, and alkylphenol formaldehyde tackifying resin is prepared; then acetylene and the alkylphenol formaldehyde tackifying resin are adopted to react by taking zincate as a catalyst, and the acetylene-modified alkylphenol formaldehyde super-tackifying resin is prepared. The super-tackifying resin prepared with the adoption of the method can have a cross-linking reaction with double bonds in rubber, has an outstanding long-term tackifying effect, and also has an excellent long-term tackifying effect in severe conditions such as high temperature, high humidity and the like; besides, the process is simplified, a large quantity of extra solvent and water are prevented from being produced in processes including solvent dissolution, neutralization, extraction, water washing and the like, and pollution to the environment is reduced to a largest extent. The successful development of the resin meets the increasing market requirement for tackifying resin used for high-performance rubber, therefore, the improvement in the product grade in the tire industry can be powerfully promoted, and great significance is achieved for promoting development of the rubber additive industry.

Description

technical field [0001] The invention relates to an improvement of a preparation method of an alkylphenol formaldehyde tackifying resin, which belongs to the technical field of chemical industry, in particular to a preparation method of an acetylene-modified alkylphenol formaldehyde super tackifying resin. Background technique [0002] At present, among the tackifying resins widely used in the tire and rubber industries, the alkylphenol formaldehyde tackifying resin can endow the rubber compound with good initial viscosity. The tackifying mechanism is: the phenol in the alkylphenol formaldehyde tackifying resin The hydroxyl group has a certain polarity, and the hydrogen on the hydroxyl group has the ability to form a hydrogen bond. During the mixing process of the rubber compound, a hydrogen bond interpenetrating network structure can be formed on the interface, thereby increasing the self-adhesiveness of the rubber compound; The alkyl group is a non-polar group, has a certai...

AI Technical Summary

Problems solved by technology

However, this kind of resin also has the following disadvantages: the viscosity-increasing performance of the rubber will decrease significantly when it is stored for a long time or under harsh conditions such as high temperature and high humidity.

But the disadvantages are: the production process is complex, including solvent dissolution, neutralization, extraction, washing and other processes, the production cost is high, and a large amount of additional solvents and waste water are generated; all use halogenated substances, which have strong The irritation and toxicity of chemical industry products after the reaction will affect the environment after being discharged into the atmosphere, and may cause acid rain after long-term accumulation

[0006] Through the above search and analysis, at present, there is no active double bond in the tackifying resin molecule, which can make natural rubber and synthetic rubber have long-term tackifying performance under harsh conditions such as high temperature and high humidity, and the process is simplified (avoiding Solvent dissolution, neutralization, extraction, water washing and other processes), except for a small amount of waste water generated by reaction condensation, no additional waste water and solvent generation, environmental protection acetylene-modified alkylphenol formaldehyde super tackifying resin preparation method report

Images