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A technology of terpene resin and production method, applied in the field of chemical material production, can solve problems such as anxiety
Inactive Publication Date: 2012-08-15
WUXI XINDA ROSIN & ESTER SYST
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Problems solved by technology
[0002] As people pay more and more attention to food safety, the production process of terpene resin as a food additive uses highly toxic toluene solvents, which has aroused people's concern and anxiety
Method used
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Examples
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Embodiment 1
[0011] Place a 1L four-neck flask in a constant temperature ice-water bath, and the four ports are respectively: stirrer, thermometer, reflux device and dropping port. Put 200 g of solvent cyclohexane into the flask, add 12 g of anhydrous aluminum trichloride, and use wetland turpentine as the raw material. It contains 50.53% of а-pinene and 36% to 39% of β-pinene (the rest is other olefins). The total amount of turpentine is 300g, 150g is put into it initially, and the rest is added dropwise. The above system was stirred at 0°C to initiate the reaction, the reaction temperature was raised to 20°C, the cooling temperature was controlled at about 10°C, and the reaction was carried out for 8 hours. After washing with water and post-treatment, 220 g of the product was finally obtained, with a softening point of 103°C.
Embodiment 2
[0013] With the same device as in Example 1, 250 g of methylcyclohexane was put into the flask, 12 g of anhydrous aluminum trichloride was added, and the raw material was wetland turpentine (the same composition as in Example 1). The total amount of turpentine is 250g, 150g is added at the initial stage, 100g is added dropwise, stirring is started after feeding, the reaction temperature is raised to 30°C, and the reaction is carried out for 8h under the condition of cooling and controlling the temperature of 20°C, and the final product is 158g, and the softening point is 105°C.
Embodiment 3
[0015] In a 50L enamel jacketed cooling reactor, there is a slanted paddle stirrer with a mechanical seal at a speed of 150 rpm, and a 10L drip tank is added dropwise to the kettle through a flow meter.
[0016] Proportion: slash pine turpentine (a-pinene content about 50%, β-pinene content about 38%) 12kg
[0018] First put all the cyclohexane and aluminum trichloride into the reactor, put 6kg of turpentine, start stirring, cool the reactor with water, control the temperature below 30°C, add the remaining 6kg of turpentine dropwise within 2 hours, and continue the reaction for 6 hours. After washing with water, 9.5 kg of terpene resin was finally obtained. The softening point is 98°C.
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Abstract
The invention relates to a production method of a terpene resin, belonging to the technical field of chemical material production. The invention is an improvement on the basis of the traditional synthesis method of a terpene resin. The production method comprises steps as follows: alpha-pinene or beta-pinene is used as the main raw material, a non-benzene solvent is used as a production solvent instead of methylbenzene or dimethylbenzene, and aluminum trichloride or an aluminum trichloride/antimony trichloride compound system is used as a catalyst; and polymerization is carried out at low temperature or normal temperature, and the product is washed with water to obtain the terpene resin. The solvent is cyclohexane and homologs thereof, and the like, which are saturated alkanes with bioinertness, and the mass ratio of the solvent to the raw material is (0.2-2.0):1; the reaction time is 1-15 hours; the catalyst accounts for 3-10% of the raw material; the reaction temperature range is -10-130 DEG C; and the reaction pressure is 0-0.3MPa (gage pressure). The production technique is simple, safe and sanitary; and the terpene resin synthesized by the method can be used in the field of gum confection bodying agents, hot-melt adhesives for food packaging, sanitary products and the like more safely.
Description
technical field [0001] The invention discloses a production method of terpene resin, which is a novel and excellent tackifier and belongs to the technical field of chemical material production. Background technique [0002] As people pay more and more attention to food safety, the production process of terpene resin as a food additive uses highly toxic toluene solvents, which has aroused people's concern and anxiety. Therefore, the reform of its traditional production method, the use of safer solvents than toluene solvents, this topic is naturally mentioned on the reform agenda. The present invention uses non-benzene solvents instead of toluene or xylene as the production solvent to synthesize terpene resins. On the one hand, it ensures that the safety of the products used in the fields of food additives, food packaging, and human hygiene products is improved, and on the other hand, it avoids the use of Highly toxic substances (toluene) have great practical significance and...
Claims
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Application Information
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