Low-heat-generation functional resin as well as preparation method and application thereof

Abstract

The invention provides low-heat-generation functional resin which is characterized in that the structural general formula is shown in the specification, in the formula, R is disclosed in the invention, R1 is a saturated alkane chain, R2 is an unsaturated olefin chain, m is an integer of 1-10, and q is an integer of 1-10, and n is an integer of 0-3. According to the low-heat-generation functional resin provided by the invention, the filler can be more uniformly dispersed in a rubber matrix, and stress concentration points are reduced. Meanwhile, the phenolic hydroxyl group can reduce agglomeration of the white carbon black and improve dispersion of the white carbon black in a matrix, and the advantages are integrated, so that the effect of improving the application performance of the resin is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified resins, and in particular relates to a low heat generation functional resin and its preparation method and application. Background technique [0002] With the continuous improvement of people's living standards, there are higher requirements for the demand and quality of automobiles, which also put forward higher requirements for the tire industry. The EU tire labeling law was officially implemented on November 1, 2012, and my country also implemented a tire labeling system in 2016. With the implementation of the labeling law, higher requirements are put forward for the quality and performance of tires, including tire safety performance, energy consumption performance and wear resistance performance. Therefore, how to balance the relationship between wet skid resistance, rolling resistance and wear resistance is an important problem in the development of high-performance green tir...

AI Technical Summary

Problems solved by technology

[0005] 1) When there are too many unreacted double bonds in the resin, too many unreacted double bonds will consume the complexes of sulfur and accelerators, resulting in a reduction in the active complexes for rubber crosslinking, and ultimately lead to a decrease in the curing time Prolonged and reduced vulcanization strength, which brings the disadvantages of increased vulcanization time and increased energy consumption in the process; in terms of performance, it leads to wet slippery, wear-resistant, and poor hardness of the vulcanized rubber, which reduces the service life of the tire. At the same time, double bond consumption After being used as a rubber cross-linking complex, the double bond content in the rubber will increase, which will lead to the deterioration of the anti-ozone, thermal oxygen, and photo-oxidative aging properties of the rubber, which will eventually make the tire prone to cracks during use and reduce the tire quality. Service life and safety performance

[0006] 2) When the double bond content in the resin is small, the resin can only be dispersed in the rubber matrix through the intermolecular force between the resin and the rubber, such as: van der Waals force, hydrogen bond, etc., and the bonding force between the resin and the rubber is weak. It is easy to lead to uneven dispersion of resin, which leads to poor dispersion of fillers, which makes the processing performance of rubber deviate, and at the same time cannot effectively increase the glass transition temperature of the rubber compound and improve the wet skid resistance of rubber

Although resin hydrogenation can reduce the resin unsaturation, there are many limitations: 1) The hydrogenation reaction is not selective, and will change all unsaturated double bonds in the resin into saturated single bonds, reducing the iodine value of the resin to close to 0g I 2 / 100g, which causes part of the aromatic hydrocarbon structure to change into a cycloalkane structure, which reduces the rigid structure of the resin and lowers the glass transition temperature, thereby shifting the Tanδ peak value of the vulcanized rubber to the left and weakening the wet skid resistance; 2) Aromatic The hydrocarbon structure changes to the cycloalkane structure, which makes the compatibility between the resin and other additives slightly worse, which easily leads to uneven dispersion of fillers and stress concentration; 3) Reducing the unsaturation of the resin through hydrogenation process, this process is complicated, Usually, high temperature of 220-300°C and high pressure of 15-25MPa are required, which requires high equipment and high energy consumption. However, the use of hydrogen makes the process more dangerous. At the same time, the catalyst used for hydrogenation is a precious metal catalyst, which is extremely difficult in the reaction process. Easy to deactivate, low catalyst recycling rate, resulting in high catalyst cost

Therefore, the method of reducing resin unsaturation by using complex, costly and dangerous hydrogenation process has relatively low economic benefits in the tire industry

Images