Light-colored terpene phenol resin with high softening point as well as preparation method and application of light-colored terpene phenol resin

Abstract

The invention discloses light-colored terpene phenol resin with a high softening point. The structural formula of resin is shown in formula (I). The raw material terpene of the light-colored terpene phenol resin with the high softening point is a natural renewable resource, is abundantly sourced, cheap, environmentally friendly and clean; the light-colored terpene phenol resin with the high softening point can improved adhesiveness and strength of an adhesive, can be widely applied to rubber products such as styrene butadiene rubber, natural rubber and neoprene, and can play an excellent tackifying effect. The invention also discloses a preparation method of the light-colored terpene phenol resin with the high softening point. The preparation method is simple, and preparation can be achieved by polymerization-washing-distillation; a small quantity of catalyst is used and dissolved in a solvent, and thus, post-treatment is simple, and basically no corrosion or environmental pollution occurs; the problems of dark color and relatively low softening point of resin in the synthesis process of terpene phenol can be solved. The invention also discloses an application of the light-coloredterpene phenol resin with the high softening point as a rubber tackifier or a tire additive.

Description

technical field [0001] The invention relates to a terpene phenol resin and its preparation method and application, in particular to a light-colored high softening point terpene phenol resin and its preparation method and application. Background technique [0002] The annual output of turpentine in my country ranks first in the world. Using turpentine as raw material to produce high value-added fine chemical products is in line with the strategy of sustainable development and has important economic value and research significance. Among them, the terpene phenolic resin prepared by co-condensation of turpentine or pinene and phenolic substances is a typical representative thereof. This type of resin has good light resistance and heat resistance, and contains phenolic structural units, making its intramolecular interactions more complex than ordinary polyterpene resins, resulting in different properties and applications from the latter. Terpene phenol resin has good compatibil...

AI Technical Summary

Problems solved by technology

Based on this, my country began to study it in the middle and late 20th century, but little progress was made. At present, it is mainly obtained by cationic polymerization of terpenes and phenols under the action of catalysts such as Lewis acids. It is unstable in medium and prone to termination reaction, which leads to low polymerization efficiency. In order to improve polymerization efficiency, the amount of catalyst is generally increased, which will not only lead to waste of catalyst, affect the later catalyst treatment, pollute the environment, but also cause the color of the resin to deepen. In order to reduce the resin The color does not affect the yield. Generally, low temperature is used for polymerization. However, because phenolic substances and α-pinene need to overcome high energy during polymerization, they are difficult to activate and effectively polymerize at lower temperatures, resulting in resin production. The rate is low, so the terpene phenol reaction process generally requires a higher temperature to increase the polymerization efficiency, but under high temperature conditions, the color of the resin will deepen and the transfer of the polymer chain will be accelerated, resulting in a decrease in the degree of polymerization and a smaller molecular weight. Eventually lead to a low softening point of the resin

Because of these problems, the color of the terpene phenolic resins currently researched is generally greater than the No. 6 color, and the softening point is less than 140°C, which limits its scope of use and value.

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