Non-toxic polyvinyl chloride resin terminator and preparation method thereof

Abstract

The invention discloses a non-toxic polyvinyl chloride resin terminator and a preparation method thereof, and relates to the technical field of terminators, and the non-toxic polyvinyl chloride resin terminator comprises the following materials in parts by weight: ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2, 2, 6, 7-tetramethyl-4-piperidine-2-yl]-1, 2, 4- The composition is prepared from the following components in parts by weight: 20 to 30 parts of 2, 2, 6, 6-tetramethylpiperidine-1-yl]-ethyl ester, 15 to 25 parts of 1-bromo-n-pentane, 30 to 40 parts of coniferyl alcohol derivative compound, 25 to 35 parts of mustard acyl derivative compound, 60 to 70 parts of antioxidant and 60 to 150 parts of polymerization inhibitor. By introducing the coniferyl alcohol derivative compound and the sinapyl acyl derivative compound, the terminator has the advantages of high planting efficiency and non-toxic preparation, and the light stability can be effectively improved by mixing the ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2, 2, 6, 6-tetramethylpiperidine-1-yl]-ethyl ester and the 1-bromo-n-pentane.

Description

Technical Field

[0001] The invention belongs to the technical field of terminators, and in particular relates to a non-toxic polyvinyl chloride resin terminator and a preparation method thereof. Background Art

[0002] In the production of PVC suspension polymerization, the role of the terminator is: when the monomer polymerization reaches a certain degree, adding a terminator can completely stop the polymerization reaction or sharply slow it down, so as to achieve the purpose of controlling the appropriate polymerization depth and improving the thermal stability and processing performance of the product.

[0003] At present, commonly used terminators include bisphenol A, acetone thiosemicarbazone (ATSC), diethylhydroxylamine, etc., and the dosage forms include aqueous solution type, water emulsion type, oil solution type and water suspension type; although all use water as the medium, bisphenol A and acetone thiosemicarbazone (ATSC) are toxic, and the above terminators all have problems such as low termination efficiency, poor emulsion stability and low aging whiteness. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a non-toxic polyvinyl chloride resin terminator and a preparation method and device thereof, which at least partially solve the above problems.

[0005] The technical scheme adopted by the present invention is a non-toxic polyvinyl chloride resin terminator, which comprises the following materials in proportion by weight: 20-30 parts of 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ethylhexanoate, 15-25 parts of 1-bromopentane, 30-40 parts of coniferyl alcohol derivative compounds, 25-35 parts of sinapinic acid derivative compounds, 60-70 parts of antioxidants and 60-150 parts of polymerization inhibitors.

[0006] Furthermore, the coniferyl alcohol derivative compound includes one or more of eugenol, vanillin, ferulic acid, and 4-n-propylguaiacol.

[0007] Furthermore, the sinapinic acid derivative compound includes syringaldehyde and / or 4-n-propyl syringol.

[0008] Furthermore, the polymerization inhibitor comprises the following materials in proportion by weight: 6-8 parts of hydroxy-substituted benzothiazole and 1-2 parts of high comparative area metal oxide.

[0009] Further, the antioxidant consists of antioxidant 1098, antioxidant 1010, antioxidant 1135, antioxidant 168 and antioxidant 264; Among them, the dosage of antioxidant 1098 is 16-18 parts, the dosage of antioxidant 1010 is 8-14 parts, the dosage of antioxidant 1135 is 6-11 parts, the dosage of antioxidant 168 is 10-16 parts, and the dosage of antioxidant 264 is 18-22 parts; Preferably, the weight ratio of the coniferyl alcohol derivative compound is 35-37 parts and the weight ratio of the sinapinic acid derivative compound is 30-32 parts.

[0010] Furthermore, it also includes 5-8 parts of emulsifier, 2-6 parts of dispersant and 3-9 parts of heat stabilizer; Wherein, the emulsifier is a mixture of any two or more of sorbitan monolaurate, sorbitan trioleate, polyoxyethylene sorbitan monolaurate, sorbitan monostearate polyoxyethylene ether, and polyoxyethylene sorbitan monooleate; The dispersant is polyvinyl alcohol.

[0011] On the other hand, the present invention also proposes a method for preparing a non-toxic polyvinyl chloride resin terminator, comprising the following steps: Add 60-150 parts of a polymerization inhibitor, 20-30 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 15-25 parts of 1-bromopentane, 30-40 parts of a coniferyl alcohol derivative compound, 25-35 parts of a sinapinic acid derivative compound and 3-9 parts of a heat stabilizer to 60-70 parts of an antioxidant and stir to obtain a mixed solution A; Add 5-8 parts of emulsifier to mixed solution A and stir evenly to obtain mixed solution B; Add 2-6 parts of the dispersant into water and stir evenly to obtain a mixed solution C; Add the mixed solution C into the mixed solution B and stir evenly to obtain a terminator crude material; The terminator coarse material is crushed and homogenized by a sand grinder, and the terminator product is passed into the silo.

[0012] Further, the polymerization inhibitor, ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 1-bromopentane, coniferyl alcohol derivative compound, sinapinic acid derivative compound and thermal stabilizer are added to the antioxidant and placed at room temperature and pressure using a high shear mixing emulsifier, and stirred for 1-4 hours to obtain a mixed solution A.

[0013] Furthermore, the emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is uniformly sheared and stirred at high speed, and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0014] The beneficial effects of the present invention are: The present invention introduces a coniferyl alcohol derivative compound and a sinapinic acid derivative compound, so that the terminator has the advantages of high termination efficiency and non-toxic preparation, and the mixture of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester and 1-bromopentane can effectively improve the light stability, thereby improving the resin aging whiteness performance of the terminator.

[0015] The terminator prepared by the present invention has good stability and high termination efficiency for esterification reaction, and greatly improves the thermal stability of the terminator compared with the prior art. Moreover, the aging whiteness of the resin produced by using the terminator exceeds the requirement of 88 aging whiteness. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with embodiments.

[0017] The disclosure below provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0018] The embodiment of the present invention provides a non-toxic polyvinyl chloride resin terminator, comprising the following materials in proportion by weight: 20-30 parts of 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ethylhexanoate, 15-25 parts of 1-bromopentane, 30-40 parts of coniferyl alcohol derivative compounds, 25-35 parts of sinapinic acid derivative compounds, 60-70 parts of antioxidants, and 60-150 parts of polymerization inhibitors. By introducing coniferyl alcohol derivative compounds and sinapinic acid derivative compounds, the terminator has the advantages of high planting efficiency and non-toxic preparation, and the mixture of 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ethylhexanoate and 1-bromopentane can effectively improve the light stability.

[0019] In a further embodiment of this example, the coniferyl alcohol derivative compound includes one or more of eugenol, vanillin, ferulic acid, and 4-n-propylguaiacol.

[0020] It should be noted that during the free radical polymerization process, coniferyl alcohol can terminate the growing chain by capturing free radicals, allowing for more fine-tuning of the molecular weight and structural properties of the final product. With the increasing attention paid to sustainable development and environmental protection, finding green chemical methods has become an urgent task.

[0021] As a naturally occurring substance, coniferyl alcohol comes from a renewable resource - plants, so using it as a terminator helps reduce dependence on petrochemical raw materials. In addition, compared with traditional petroleum-based terminators, coniferyl alcohol-based derivative compounds tend to show lower toxicity and are more easily biodegradable.

[0022] Coniferyl alcohol and its derivatives can also give materials additional functionality. Copolymers containing coniferyl alcohol units have excellent mechanical strength, thermal stability and optical transparency.

[0023] In a further embodiment of this example, the sinapinic acid derivative compound includes syringaldehyde and / or 4-n-propyl syringol.

[0024] It should be noted that sinapoyl derivatives can effectively terminate free radical polymerization reactions. Since they contain phenolic hydroxyl groups and other active functional groups, such as carboxyl or ester groups, they can react with the ends of growing polymer chains to prevent further chain growth. During free radical polymerization, sinapoyl derivatives can capture free radicals to form stable covalent bonds, thereby terminating the growth of the chain.

[0025] The physical and chemical properties of the final product can also be improved. The polymer containing the sinapinic acid unit has better thermal stability, mechanical strength and antioxidant properties, and gives the material excellent optical transparency and surface properties.

[0026] Sinapoyl derivatives are derived from natural plant ingredients, so they are relatively environmentally friendly and harmless to the environment. Compared with traditional petroleum-based terminators, these compounds tend to show lower toxicity and higher biodegradability. This means that the use of sinapoyl derivatives not only reduces dependence on non-renewable resources, but also reduces the risk of environmental pollution during the production process.

[0027] In a further implementation of this example, the polymerization inhibitor includes the following materials in proportion by weight: 6-8 parts of hydroxyl-substituted benzothiazole and 1-2 parts of high specific area metal oxide.

[0028] It should be noted that the time required to inhibit or slow down the reaction rate by mixing the hydroxy-substituted benzothiazole and the high specific area metal oxide to prepare the inhibitor is effectively reduced.

[0029] The core structure of the hydroxy-substituted benzothiazole derivatives is a central benzothiazole ring, which provides good thermal and chemical stability.

[0030] Hydroxyl substitution: Hydroxyl (-OH) replaces the hydrogen atom on the benzothiazole ring, increasing the polarity of the molecule. It has strong nucleophilicity and electron donating ability, and can react with the free radicals generated in the polymerization reaction to form stable free radicals or terminate the growth of the free radical chain.

[0031] High specific surface area metal oxides have the following characteristics: high specific surface area and abundant surface active sites. They can effectively inhibit polymerization reactions by capturing free radicals or other active species through physical adsorption, and can complement hydroxyl-substituted benzothiazole to further enhance the inhibitory effect.

[0032] In a further embodiment of this example, the antioxidant is composed of antioxidant 1098, antioxidant 1010, antioxidant 1135, antioxidant 168 and antioxidant 264. Among them, the dosage of antioxidant 1098 is 16-18 parts, the dosage of antioxidant 1010 is 8-14 parts, the dosage of antioxidant 1135 is 6-11 parts, the dosage of antioxidant 168 is 10-16 parts, and the dosage of antioxidant 264 is 18-22 parts; Preferably, the weight ratio of the coniferyl alcohol derivative compound is 35-37 parts and the weight ratio of the sinapinic acid derivative compound is 30-32 parts.

[0033] By using the above different types of antioxidants, they can interact with each other to produce a synergistic effect, thereby improving the overall antioxidant performance, covering all stages from the initial stage to the later stage, and providing continuous antioxidant protection. The performance of the terminator can be effectively improved by the preferred weight ratio of the coniferyl alcohol derivative compound and the sinapinic acid derivative compound.

[0034] In a further embodiment of this embodiment, an emulsifier, a dispersant and a thermal stabilizer are also included; Wherein, the emulsifier is a mixture of any two or more of sorbitan monolaurate, sorbitan trioleate, polyoxyethylene sorbitan monolaurate, sorbitan monostearate polyoxyethylene ether, and polyoxyethylene sorbitan monooleate; The dispersant is polyvinyl alcohol.

[0035] On the other hand the present invention also proposes a method for preparing a non-toxic polyvinyl chloride resin terminator, comprising the following steps: Adding a polymerization inhibitor, ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 1-bromopentane, a coniferyl alcohol derivative compound, a sinapinic acid derivative compound and a heat stabilizer to an antioxidant and stirring to obtain a mixed solution A; Adding the emulsifier into the mixed solution A and stirring evenly to obtain a mixed solution B; Add the dispersant into water and stir evenly to obtain a mixed solution C; Add the mixed solution C into the mixed solution B and stir evenly to obtain a terminator crude material; The terminator coarse material is crushed and homogenized by a sand grinder to obtain the terminator product which is then passed into the silo.

[0036] In a further implementation of this embodiment, an inhibitor, ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 1-bromopentane, a coniferyl alcohol derivative compound, a sinapinic acid derivative compound and a thermal stabilizer are added to an antioxidant and placed at room temperature and pressure using a high shear mixing emulsifier, and stirred for 1-4 hours to obtain a mixed solution A.

[0037] In a further embodiment of this example, the emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0038] The present invention is further explained below through several specific embodiments, which are only for illustration and are not intended to be limiting. Example 1 60 parts of polymerization inhibitor, 20 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 15 parts of 1-bromopentane, 30 parts of coniferyl alcohol derivative compound, 25 parts of sinapinic acid derivative compound and heat stabilizer are added to 60 parts of antioxidant, and the mixture is placed in a high shear mixing emulsifier at room temperature and pressure, and stirred for 2 hours to obtain a mixed solution A; The emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0039] Example 2 80 parts of polymerization inhibitor, 22 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 17 parts of 1-bromopentane, 32 parts of coniferyl alcohol derivative compound, 27 parts of sinapinic acid derivative compound and heat stabilizer were added to 62 parts of antioxidant, and the mixture was placed in a high shear mixing emulsifier at room temperature and pressure, and stirred for 2 hours to obtain a mixed solution A; The emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0040] Example 3 100 parts of polymerization inhibitor, 24 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 19 parts of 1-bromopentane, 34 parts of coniferyl alcohol derivative compound, 29 parts of sinapinic acid derivative compound and heat stabilizer are added to 64 parts of antioxidant, placed in a high shear mixing emulsifier at room temperature and pressure, and stirred for 2 hours to obtain a mixed solution A; The emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0041] Example 4 120 parts of polymerization inhibitor, 26 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 21 parts of 1-bromopentane, 36 parts of coniferyl alcohol derivative compound, 31 parts of sinapinic acid derivative compound and heat stabilizer are added to 66 parts of antioxidant, and the mixture is placed in a high shear mixing emulsifier at room temperature and pressure, and stirred for 2 hours to obtain a mixed solution A; The emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0042] Example 5 140 parts of polymerization inhibitor, 28 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 23 parts of 1-bromopentane, 38 parts of coniferyl alcohol derivative compound, 33 parts of sinapinic acid derivative compound and heat stabilizer were added to 68 parts of antioxidant, and the mixture was placed in a high shear mixing emulsifier at room temperature and pressure, and stirred for 2 hours to obtain a mixed solution A; The emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0043] Example 6 150 parts of polymerization inhibitor, 30 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 25 parts of 1-bromopentane, 40 parts of coniferyl alcohol derivative compound, 35 parts of sinapinic acid derivative compound and heat stabilizer are added to 70 parts of antioxidant, and the mixture is placed in a high shear mixing emulsifier at room temperature and pressure, and stirred for 2 hours to obtain a mixed solution A; The emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

[0044] Comparative Example 1 KLD-586 high-efficiency emergency terminator produced by Xi'an Daerda Chemical Co., Ltd.

[0045] Comparative Example 2 CF960 high-efficiency terminator produced by Jiangsu Huajin Chemical Technology Co., Ltd.

[0046] The terminators prepared in the above-mentioned Examples 1 to 6 and the terminators in Comparative Examples 1 and 2 were respectively used to produce resins, and the produced resins were subjected to aging whiteness test, optical test and thermal stability test.

[0047] in, In the resin production, 1000ppm of terminator is used to produce 300g of resin. After the terminator is added, a water bath is performed with a water bath temperature of 95°C and a water bath time of 20min. After the water bath, the resin is filtered for 10min and dried at 50°C for 16h. After drying, an aging whiteness test is performed.

[0048] Specifically, the produced resin was heated at 163° C. for 10 minutes, and the resin was tested for aging whiteness. The test results are shown in Table 1.

[0049] Table 1 Resin aging whiteness test data

[0050] As shown in Table 1, the resin produced by the terminator can achieve an aged whiteness of more than 90%, exceeding the requirement of 88% and much greater than the aged whiteness of Comparative Examples 1 and 2. Therefore, the terminator can greatly improve the aged whiteness of the obtained resin.

[0051] The resin for testing the whiteness of over-aging was optically tested, and the optical test data were shown in Table 2.

[0052] Table 2 Optical test data

[0053] Among them, the L value is the transmittance; a represents red and green, and a positive value represents reddish; b value represents yellow and blue, and a positive value represents yellowish.

[0054] As shown in Table 2, after the resin was subjected to the aging whiteness test and then subjected to the optical test, its transmittance was still above 94%, which was better than the transmittance of the terminators in Comparative Examples 1 and 2, and there was only a slight change in the measurement, which was basically negligible. Therefore, the terminator can greatly improve the photostability of the obtained resin.

[0055] The Congo red method was used to test the oil bath at 165°C. The results are shown in Table 3: Table 3 Thermal stability test data

[0056] As shown in Table 3, it can be seen that the resin prepared by using the terminator has good thermal stability, and its thermal stability is stronger than that of the terminators of Comparative Examples 1 and 2.

[0057] Furthermore, it can be seen from Tables 1 to 3 above that the aging whiteness, transmittance test data and Congo red test thermal stability data of the terminator prepared in Example 4 have the best effect.

[0058] The above are only embodiments of the present invention. The common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for technicians in this field, without departing from the structure of the present invention, they can also make several deformations and improvements, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A non-toxic polyvinyl chloride resin terminator, characterized in that: The invention comprises the following materials in proportion by weight: 20-30 parts of 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ethylhexanoate, 15-25 parts of 1-bromopentane, 30-40 parts of coniferyl alcohol derivative compounds, 25-35 parts of sinapinic acid derivative compounds, 60-70 parts of antioxidants and 60-150 parts of polymerization inhibitors.

2. The non-toxic polyvinyl chloride resin terminator according to claim 1, characterized in that: The coniferyl alcohol derivative compound includes one or more of eugenol, vanillin, ferulic acid, and 4-n-propylguaiacol.

3. The non-toxic polyvinyl chloride resin terminator according to claim 1, characterized in that: The sinapinic acid derivative compound includes syringaldehyde and / or 4-n-propylsyringol.

4. The non-toxic polyvinyl chloride resin terminator according to claim 1, characterized in that: The polymerization inhibitor comprises the following materials in proportion by weight: 6-8 parts of hydroxyl-substituted benzothiazole and 1-2 parts of high specific area metal oxide.

5. The non-toxic polyvinyl chloride resin terminator according to claim 1, characterized in that: The antioxidant consists of antioxidant 1098, antioxidant 1010, antioxidant 1135, antioxidant 168 and antioxidant 264; Among them, the dosage of antioxidant 1098 is 16-18 parts, the dosage of antioxidant 1010 is 8-14 parts, the dosage of antioxidant 1135 is 6-11 parts, the dosage of antioxidant 168 is 10-16 parts, and the dosage of antioxidant 264 is 18-22 parts; Preferably, the weight ratio of the coniferyl alcohol derivative compound is 35-37 parts and the weight ratio of the sinapinic acid derivative compound is 30-32 parts.

6. The non-toxic polyvinyl chloride resin terminator according to claim 1, characterized in that: Also includes 5-8 parts of emulsifier, 2-6 parts of dispersant and 3-9 parts of heat stabilizer; Wherein, the emulsifier is a mixture of any two or more of sorbitan monolaurate, sorbitan trioleate, polyoxyethylene sorbitan monolaurate, sorbitan monostearate polyoxyethylene ether, and polyoxyethylene sorbitan monooleate; The dispersant is polyvinyl alcohol.

7. A method for preparing a non-toxic polyvinyl chloride resin terminator, characterized in that: The following steps are involved: Add 60-150 parts of a polymerization inhibitor, 20-30 parts of ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 15-25 parts of 1-bromopentane, 30-40 parts of a coniferyl alcohol derivative compound, 25-35 parts of a sinapinic acid derivative compound and 3-9 parts of a heat stabilizer to 60-70 parts of an antioxidant and stir to obtain a mixed solution A; Add 5-8 parts of emulsifier to mixed solution A and stir evenly to obtain mixed solution B; Add 2-6 parts of the dispersant into water and stir evenly to obtain a mixed solution C; Add the mixed solution C into the mixed solution B and stir evenly to obtain a terminator crude material; The terminator coarse material is crushed and homogenized by a sand grinder to obtain the terminator product which is then passed into the silo.

8. The method for preparing the non-toxic polyvinyl chloride resin terminator according to claim 7, characterized in that: Add the polymerization inhibitor, ethylhexanoic acid 2-[4-(2-ethylhexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yl]-ethyl ester, 1-bromopentane, coniferyl alcohol derivative compound, sinapinic acid derivative compound and thermal stabilizer to the antioxidant, place the mixture at room temperature and pressure using a high shear mixing emulsifier, and stir thoroughly for 1-4 hours to obtain a mixed solution A.

9. The method for preparing a non-toxic polyvinyl chloride resin terminator according to claim 7, wherein: The emulsifier is added to the mixed solution A, and the temperature is raised to 70-90° C., and then the mixed solution is stirred at a high speed and then cooled to room temperature to obtain a mixed solution B; Heat the dispersant in water and raise the temperature to 105-110°C, stir evenly at high speed, and then cool to room temperature to obtain a mixed solution C; The mixed solution C is added into the mixed solution B, stirred evenly, and then passed into a sand grinder for crushing and homogenization to obtain the terminator product which is passed into the silo.

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