A light-colored liquid terpene resin with high solid content and low softening point, its preparation method and application

Abstract

The present invention discloses high-solid-content low-softening-point light-colored liquid terpene resin. The resin has a structure shown in a general formula (I), wherein n is an integer, and the value range of n satisfies a relationship of 2<=n<=5. The present invention also discloses a preparation method and application of the liquid terpene resin. The liquid terpene resin provided by the present invention has a solid content of 99% or more, a color (solid Gardner color scale) of less than a No.3 color and a softening point of less than 28 DEG C, can be used as a non-solvent type lubricantto be directly used in glass fibers to replace a paraffin latex liquid, can also be used as a liquid component of a tackifying emulsion to replace a low-molecular organic solvent or mineral oil, andis used as tackifying resin to be directly applied to a low-temperature-resistant adhesive.

Description

technical field [0001] The invention relates to a liquid terpene resin and its preparation method and application, in particular to a light-colored liquid terpene resin with high solid content and low softening point 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 resin obtained by polymerizing turpentine or pinene as a raw material is widely used due to its excellent performance. Terpene resin is an excellent tackifier with excellent properties such as strong adhesion, good aging resistance, good heat resistance, light resistance, alkali resistance, odorless and non-toxic, and is widely used in coatings, rubber, inks, etc. , packaging, adhesives and other i...

AI Technical Summary

Problems solved by technology

Due to the complex composition of this type of product, it is prone to unstable performance during use, especially at low temperature, which is prone to solidification and precipitation, which affects the performance of use. In addition, this type of oil-soluble liquid emulsion product is due to the use of organic solvents. also cause environmental pollution

The second type is liquid rosin resin: under normal circumstances, rosin polyol ester has higher softening point and higher viscosity, in order to prepare low softening point, low viscosity resin, either directly mix rosin or modified rosin Alcohols or diols or their derivatives are produced by the reaction. The resin prepared in this way needs to be carried out under high temperature and high pressure. On the one hand, the energy consumption is serious, and on the other hand, some alcohol derivatives have high pollution. Application; Either prepare a rosin polyol ester with a high softening point first, then reserve the terminal hydroxyl group, and then react with a higher fatty acid at a high temperature. Problems with poor fluidity at room temperature or low temperature

At present, the preparation of liquid terpene resin generally adopts solid Lewis acid such as AlCl 3 Catalyzed polymerization, because the catalyst cannot be well dissolved in the solvent for dispersion, resulting in low polymerization efficiency of raw materials, in order to improve the polymerization efficiency, generally increase the amount of catalyst, which will not only lead to waste of catalyst, affect the later catalyst treatment, environmental pollution, but also lead to The color of the resin deepens, and in order to reduce the color of the resin without affecting the yield, polymerization is generally carried out at low temperature. The result of this treatment is that the chain transfer of the raw materials is not easy to occur during the polymerization process, and chain growth is easy to occur, which will lead to a high softening point of the resin In this case, in order to obtain a liquid resin with a low softening point, it is generally diluted by adding solvent naphtha, mineral oil or an organic solvent, which leads to a decrease in the solid content of the resin, and is prone to leakage or solidification and precipitation during later use, thereby limiting its scope of use and value

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