A composition containing 1,2-orthophthalate stearyl alcohol ester and its use in the preparation of plastic products

Abstract

The application discloses a kind of 1,2-o-phthalic acid stearyl alcohol ester-containing compositions, including 1,2-o-phthalic acid stearyl alcohol ester, chitosan adjusts bentonite modified nano zinc oxide agent, modified whisker liquid;Wherein 1,2-o-phthalic acid stearyl alcohol ester, chitosan adjusts bentonite modified nano zinc oxide agent, modified whisker liquid mass ratio is (1-2) :(5-7) :(13-15).The 1,2-o-phthalic acid stearyl alcohol ester-containing composition of the application uses 1,2-o-phthalic acid stearyl alcohol ester with chitosan adjusts bentonite modified nano zinc oxide agent, modified whisker liquid, the composition prepared in plastic product application, can effectively improve the plastic gap impact strength of plastic product, bacteriostatic durability, coordinate and improve the efficiency of product.

Description

Technical Field

[0001] This invention relates to the field of plastic product technology, and specifically to a composition containing stearyl 1,2-phthalate and its application in the preparation of plastic products. Background Technology

[0002] Plastic products play a vital role in people's daily lives and industrial and agricultural production. However, with changing health awareness, people are increasingly aware that plastic products can harbor a large number of pathogenic bacteria harmful to human health. To effectively prevent and kill bacteria on plastic surfaces, antibacterial agents are typically added to the plastic to create antibacterial plastics. This gives the plastic itself antibacterial properties, killing or inhibiting bacteria on the plastic for a certain period of time. Compared with conventional chemical and physical methods, using antibacterial plastics offers longer-lasting sterilization, and is both economical and convenient.

[0003] Existing polypropylene plastics using 1,2-stearyl phthalate compositions have poor antibacterial properties and short-lasting antibacterial activity. At the same time, the plastic has low notched impact strength, making it difficult to coordinate antibacterial durability and plastic notched impact strength. Based on this, the present invention further improves upon these properties. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a composition containing stearyl 1,2-phthalate and its application in the preparation of plastic products, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides a composition containing stearyl 1,2-phthalate, the composition comprising stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution; wherein the mass ratio of stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution is (1-2):(5-7):(13-15).

[0007] Preferably, the preparation method of the chitosan-based bentonite-modified nano-zinc oxide agent is as follows:

[0008] S01: Add 5-10 parts of nano zinc oxide to 15-20 parts of 2% hydrochloric acid solution, stir evenly first to obtain nano zinc oxide dispersant;

[0009] SO2: Add 3-6 parts of glass fiber, 0.45-0.55 parts of sodium dodecyl sulfate and 0.1-0.3 parts of lanthanum sulfate solution to the nano zinc oxide dispersant, stir evenly, and obtain nano zinc oxide compound glass fiber agent;

[0010] S03: First, stir the bentonite heat treatment agent into a 5% chitosan aqueous solution (3-5 times the mass of the bentonite heat treatment agent) until uniform. Then, add 2-4% yttrium nitrate solution (2-4% of the total volume of the chitosan aqueous solution) and stir thoroughly to obtain chitosan-prepared bentonite agent.

[0011] S04: Finally, the chitosan-modified bentonite agent is added to the nano zinc oxide-modified glass fiber agent at a weight ratio of 1:5 and stirred for reaction. Finally, it is washed with water and dried to obtain the chitosan-modified bentonite-modified nano zinc oxide agent.

[0012] Preferably, the lanthanum sulfate solution has a mass fraction of 4-8%.

[0013] Preferably, the yttrium nitrate solution has a mass fraction of 1-3%.

[0014] Preferably, the bentonite heat treatment agent is obtained by heat-treating bentonite at 300-350℃ for 10-20 minutes, and then cooling it to 40-45℃ at a rate of 1-3℃ / min and holding it at that temperature.

[0015] Preferably, the stirring speed of the SO4 reaction is 450-550 r / min, the stirring time is 35-45 min, and the stirring temperature is 40-45℃.

[0016] Preferably, the modified whisker solution is prepared by:

[0017] S11, add sodium carboxymethyl cellulose, 5-10% of the total weight of silicon carbide whiskers, silane coupling agent KH560, and 1-3% of the total weight of silicon carbide whiskers to silicon carbide whiskers at a weight ratio of 5:1, and stir until uniform.

[0018] S12, Feed the product from S11 into a ball mill and ball mill for 1-2 hours at a speed of 1000-1500 r / min. After ball milling, set aside for later use.

[0019] Add 20-30% sodium alginate aqueous solution and 2-5% sodium silicate aqueous solution of S12 ball milling product to the S13 and S12 ball milling products, stir evenly, and obtain modified whisker solution.

[0020] Preferably, the sodium alginate aqueous solution has a mass fraction of 10-20%.

[0021] Preferably, the sodium silicate aqueous solution has a mass fraction of 5-10%.

[0022] The present invention also provides the use of a composition containing stearyl 1,2-phthalate in the preparation of plastic products.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The composition of this invention containing stearyl 1,2-phthalate uses stearyl 1,2-phthalate combined with chitosan to formulate a bentonite-modified nano-zinc oxide agent and a modified whisker solution. When applied to plastic products, the prepared composition can effectively improve the notched impact strength, antibacterial durability, and overall product efficiency. The chitosan-formulated bentonite-modified nano-zinc oxide agent involves dispersing nano-zinc oxide in hydrochloric acid solution, then combining it with glass fiber to enhance the antibacterial efficiency of the nano-zinc oxide. Sodium dodecyl sulfate and lanthanum sulfate solutions are used for coordination, and the mixture is further enhanced with a bentonite heat treatment agent and a chitosan aqueous solution. The yttrium nitrate solution was optimized, and the chitosan-modified bentonite nano-zinc oxide agent prepared in the product system enhanced the antibacterial durability and strength properties of the product. In addition, the modified whisker solution used silicon carbide whiskers, combined with sodium carboxymethyl cellulose, silane coupling agent KH560 and hexadecyltrimethylammonium bromide, optimized the silicon carbide whiskers, making them easier to disperse in the matrix and improving the overall performance of the matrix. With further coordination through sodium alginate aqueous solution and sodium silicate aqueous solution, the prepared composition was applied to plastic products, and the antibacterial durability and notched impact strength of the plastic products were further improved. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This embodiment provides a composition containing stearyl 1,2-phthalate, the composition comprising stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution; wherein the mass ratio of stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution is (1-2):(5-7):(13-15).

[0027] The preparation method of chitosan-based bentonite-modified nano-zinc oxide agent in this embodiment is as follows:

[0028] S01: Add 5-10 parts of nano zinc oxide to 15-20 parts of 2% hydrochloric acid solution, stir evenly first to obtain nano zinc oxide dispersant;

[0029] SO2: Add 3-6 parts of glass fiber, 0.45-0.55 parts of sodium dodecyl sulfate and 0.1-0.3 parts of lanthanum sulfate solution to the nano zinc oxide dispersant, stir evenly, and obtain nano zinc oxide compound glass fiber agent;

[0030] S03: First, stir the bentonite heat treatment agent into a 5% chitosan aqueous solution (3-5 times the mass of the bentonite heat treatment agent) until uniform. Then, add 2-4% yttrium nitrate solution (2-4% of the total volume of the chitosan aqueous solution) and stir thoroughly to obtain chitosan-prepared bentonite agent.

[0031] S04: Finally, the chitosan-modified bentonite agent is added to the nano zinc oxide-modified glass fiber agent at a weight ratio of 1:5 and stirred for reaction. Finally, it is washed with water and dried to obtain the chitosan-modified bentonite-modified nano zinc oxide agent.

[0032] The lanthanum sulfate solution in this embodiment has a mass fraction of 4-8%.

[0033] The mass fraction of the yttrium nitrate solution in this embodiment is 1-3%.

[0034] Preferably, the bentonite heat treatment agent is obtained by heat-treating bentonite at 300-350℃ for 10-20 minutes, and then cooling it to 40-45℃ at a rate of 1-3℃ / min and holding it at that temperature.

[0035] In this embodiment, the stirring speed of the S04 reaction process is 450-550 r / min, the stirring time is 35-45 min, and the stirring temperature is 40-45℃.

[0036] The preparation method of the modified whisker solution in this embodiment is as follows:

[0037] S11, add sodium carboxymethyl cellulose, 5-10% of the total weight of silicon carbide whiskers, silane coupling agent KH560, and 1-3% of the total weight of silicon carbide whiskers to silicon carbide whiskers at a weight ratio of 5:1, and stir until uniform.

[0038] S12, Feed the product from S11 into a ball mill and ball mill for 1-2 hours at a speed of 1000-1500 r / min. After ball milling, set aside for later use.

[0039] Add 20-30% sodium alginate aqueous solution and 2-5% sodium silicate aqueous solution of S12 ball milling product to the S13 and S12 ball milling products, stir evenly, and obtain modified whisker solution.

[0040] The sodium alginate aqueous solution in this embodiment has a mass fraction of 10-20%.

[0041] The sodium silicate aqueous solution in this embodiment has a mass fraction of 5-10%.

[0042] The application of a composition containing stearyl 1,2-phthalate in the preparation of plastic products according to this embodiment.

[0043] Example 1.

[0044] This embodiment discloses a composition containing stearyl 1,2-phthalate, comprising stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution; wherein the mass ratio of stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution is 1:5:13.

[0045] The preparation method of chitosan-based bentonite-modified nano-zinc oxide agent in this embodiment is as follows:

[0046] S01: Add 5 parts of nano zinc oxide to 15 parts of 2% hydrochloric acid solution, stir evenly, and obtain nano zinc oxide dispersant;

[0047] S02: Add 3 parts of glass fiber, 0.45 parts of sodium dodecyl sulfate and 0.1 parts of lanthanum sulfate solution to the nano zinc oxide dispersant, stir evenly to obtain nano zinc oxide compound glass fiber agent;

[0048] S03: First, stir the bentonite heat treatment agent into a 5% chitosan aqueous solution (3 times the mass fraction of the bentonite heat treatment agent) until uniform. Then, add 2% yttrium nitrate solution (2% of the total volume of the chitosan aqueous solution) and stir thoroughly to obtain chitosan-prepared bentonite agent.

[0049] S04: Finally, the chitosan-modified bentonite agent is added to the nano zinc oxide-modified glass fiber agent at a weight ratio of 1:5 and stirred for reaction. Finally, it is washed with water and dried to obtain the chitosan-modified bentonite-modified nano zinc oxide agent.

[0050] The lanthanum sulfate solution in this embodiment has a mass fraction of 4%.

[0051] The mass fraction of the yttrium nitrate solution in this embodiment is 1%.

[0052] Preferably, the bentonite heat treatment agent is obtained by heat-treating bentonite at 300°C for 10 minutes, and then cooling it to 40°C at a rate of 1°C / min and holding it at that temperature.

[0053] In this embodiment, the stirring speed of the S04 reaction process is 450 r / min, the stirring time is 35 min, and the stirring temperature is 40℃.

[0054] The preparation method of the modified whisker solution in this embodiment is as follows:

[0055] S11, add sodium carboxymethyl cellulose, 5% of the total weight of silicon carbide whiskers, silane coupling agent KH560, and 1% of the total weight of silicon carbide whiskers to silicon carbide whiskers in a weight ratio of 5:1, and stir until homogeneous.

[0056] S12, the product from S11 is fed into a ball mill and ball-milled for 1 hour at a speed of 1000 r / min. After ball milling, it is ready for use.

[0057] Add 20% sodium alginate aqueous solution and 2% sodium silicate aqueous solution of S12 ball milling product to the S13 and S12 ball milling products, stir evenly to obtain modified whisker liquid.

[0058] The sodium alginate aqueous solution in this embodiment has a mass fraction of 10%.

[0059] The sodium silicate aqueous solution in this embodiment has a mass fraction of 5%.

[0060] The application of a composition containing stearyl 1,2-phthalate in the preparation of plastic products according to this embodiment.

[0061] Example 2.

[0062] This embodiment discloses a composition containing stearyl 1,2-phthalate, comprising stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution; wherein the mass ratio of stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution is 2:7:15.

[0063] The preparation method of chitosan-based bentonite-modified nano-zinc oxide agent in this embodiment is as follows:

[0064] S01: Add 10 parts of nano zinc oxide to 20 parts of 2% hydrochloric acid solution, stir evenly, and obtain nano zinc oxide dispersant;

[0065] S02: Add 6 parts of glass fiber, 0.55 parts of sodium dodecyl sulfate and 0.3 parts of lanthanum sulfate solution to the nano zinc oxide dispersant, stir evenly to obtain nano zinc oxide compound glass fiber agent;

[0066] S03: First, stir the bentonite heat treatment agent into a 5% chitosan aqueous solution (5 times the mass fraction of the bentonite heat treatment agent) until uniform. Then, add 4% yttrium nitrate solution (4% of the total volume of the chitosan aqueous solution) and stir thoroughly to obtain chitosan-modified bentonite agent.

[0067] S04: Finally, the chitosan-modified bentonite agent is added to the nano zinc oxide-modified glass fiber agent at a weight ratio of 1:5 and stirred for reaction. Finally, it is washed with water and dried to obtain the chitosan-modified bentonite-modified nano zinc oxide agent.

[0068] The lanthanum sulfate solution in this embodiment has a mass fraction of 8%.

[0069] The yttrium nitrate solution in this embodiment has a mass fraction of 3%.

[0070] In this embodiment, the bentonite heat treatment agent is obtained by heat-treating bentonite at 350°C for 20 minutes, and then cooling it to 45°C at a rate of 3°C / min and holding it at that temperature.

[0071] In this embodiment, the stirring speed of the S04 reaction process is 550 r / min, the stirring time is 45 min, and the stirring temperature is 45℃.

[0072] The preparation method of the modified whisker solution in this embodiment is as follows:

[0073] S11, add sodium carboxymethyl cellulose, 10% of the total weight of silicon carbide whiskers, silane coupling agent KH560, and 3% of the total weight of silicon carbide whiskers to silicon carbide whiskers in a weight ratio of 5:1, and stir until homogeneous.

[0074] S12, the product from S11 is fed into a ball mill and ball-milled for 2 hours at a speed of 1500 r / min. After ball milling, it is ready for use.

[0075] Add 30% sodium alginate aqueous solution and 5% sodium silicate aqueous solution of S12 ball milling product to the S13 and S12 ball milling products, stir evenly to obtain modified whisker liquid.

[0076] The sodium alginate aqueous solution in this embodiment has a mass fraction of 20%.

[0077] The sodium silicate aqueous solution in this embodiment has a mass fraction of 10%.

[0078] The application of a composition containing stearyl 1,2-phthalate in the preparation of plastic products according to this embodiment.

[0079] Example 3.

[0080] This embodiment discloses a composition containing stearyl 1,2-phthalate, the composition comprising stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution; wherein the mass ratio of stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution is 1.5:6:14.

[0081] The preparation method of chitosan-based bentonite-modified nano-zinc oxide agent in this embodiment is as follows:

[0082] S01: Add 7.5 parts of nano zinc oxide to 17.5 parts of 2% hydrochloric acid solution, stir evenly to obtain nano zinc oxide dispersant;

[0083] SO2: Add 4.5 parts of glass fiber, 0.50 parts of sodium dodecyl sulfate and 0.2 parts of lanthanum sulfate solution to the nano zinc oxide dispersant, stir evenly to obtain nano zinc oxide compound glass fiber agent;

[0084] S03: First, stir the bentonite heat treatment agent into a 5% chitosan aqueous solution (4 times the mass fraction of the bentonite heat treatment agent) until uniform. Then, add 3% yttrium nitrate solution (3% of the total volume of the chitosan aqueous solution) and stir thoroughly to obtain chitosan-modified bentonite agent.

[0085] S04: Finally, the chitosan-modified bentonite agent is added to the nano zinc oxide-modified glass fiber agent at a weight ratio of 1:5 and stirred for reaction. Finally, it is washed with water and dried to obtain the chitosan-modified bentonite-modified nano zinc oxide agent.

[0086] The lanthanum sulfate solution in this embodiment has a mass fraction of 6%.

[0087] The mass fraction of the yttrium nitrate solution in this embodiment is 2%.

[0088] Preferably, the bentonite heat treatment agent is obtained by heat-treating bentonite at 325°C for 15 minutes, and then cooling it to 42.5°C at a rate of 2°C / min and holding it at that temperature.

[0089] In this embodiment, the stirring speed of the S04 reaction process is 500 r / min, the stirring time is 40 min, and the stirring temperature is 42.5℃.

[0090] The preparation method of the modified whisker solution in this embodiment is as follows:

[0091] S11, add sodium carboxymethyl cellulose, 7.5% of the total weight of silicon carbide whiskers, silane coupling agent KH560, and 2% of the total weight of silicon carbide whiskers to silicon carbide whiskers at a weight ratio of 5:1, and stir until homogeneous;

[0092] S12, the product from S11 is fed into a ball mill and ball-milled for 1.5 hours at a speed of 1250 r / min. After ball milling, it is ready for use.

[0093] Add 25% sodium alginate aqueous solution and 3.5% sodium silicate aqueous solution of S12 ball milling product to the ball milling products of S13 and S12, stir evenly to obtain modified whisker solution.

[0094] The sodium alginate aqueous solution in this embodiment has a mass fraction of 15%.

[0095] The sodium silicate aqueous solution in this embodiment has a mass fraction of 7.5%.

[0096] The application of a composition containing stearyl 1,2-phthalate in the preparation of plastic products according to this embodiment.

[0097] Comparative Example 1.

[0098] Unlike Example 3, the chitosan-modified bentonite nano zinc oxide agent is prepared by directly mixing chitosan aqueous solution and nano zinc oxide at a weight ratio of 5:1.

[0099] Comparative Example 2.

[0100] Unlike Example 3, in the preparation of polysaccharide-modified bentonite nano zinc oxide agent, nano zinc oxide is used instead of glass fiber agent.

[0101] Comparative Example 3.

[0102] Unlike Example 3, yttrium nitrate solution was not added to the chitosan-modified bentonite nano zinc oxide agent in the preparation of the chitosan-modified bentonite agent.

[0103] Comparative Example 4.

[0104] Unlike Example 3, in the preparation of polysaccharide-modified bentonite nano-zinc oxide agent, bentonite is directly replaced as the heat treatment agent.

[0105] Comparative Example 5.

[0106] Unlike Example 3, no modified whisker solution was added.

[0107] Comparative Example 6.

[0108] The difference from Example 3 is the preparation method of the modified whisker solution:

[0109] Add sodium carboxymethyl cellulose, 7.5% of the total weight of silicon carbide whiskers, silane coupling agent KH560, and 2% of the total weight of silicon carbide whiskers to silicon carbide whiskers at a weight ratio of 5:1, and stir until homogeneous.

[0110] 40 parts of polypropylene, 10 parts of the products of Examples 1-3 and Comparative Examples 1-6 were mixed with 2 parts of conventional triethyl citrate plasticizer and then granulated using existing granulation technology to produce plastic products.

[0111] The product performance tests for Examples 1-3 and Comparative Examples 1-6 are as follows:

[0112]

[0113] As can be seen from Examples 1-3 and Comparative Examples 1-6, the notched impact strength and antibacterial durability in Example 3 of the present invention can achieve a synergistic effect, and the product performance can be improved in a coordinated manner.

[0114] The polysaccharide-modified bentonite nano-zinc oxide agent is prepared by directly mixing chitosan aqueous solution and nano-zinc oxide at a weight ratio of 5:1 without adding modified whisker solution. The product's performance deteriorates significantly. Furthermore, in the preparation of the polysaccharide-modified bentonite nano-zinc oxide agent, nano-zinc oxide is used instead of glass fiber compound; yttrium nitrate solution is not added to the chitosan-modified bentonite agent; and bentonite heat treatment agent is directly replaced with bentonite. All these methods show a trend of deteriorating product performance. Additionally, different preparation methods for the modified whisker solution also lead to a deterioration in product performance. Only the modified whisker solution prepared using the method of this invention, combined with the polysaccharide-modified bentonite nano-zinc oxide agent of this invention, exhibits the most significant performance improvement.

[0115] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0116] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A composition containing stearyl 1,2-phthalate, characterized in that, The composition comprises stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution; wherein the mass ratio of stearyl 1,2-phthalate, chitosan-modified bentonite-modified nano-zinc oxide agent, and modified whisker solution is (1-2):(5-7):(13-15). The preparation method of the chitosan-based bentonite-modified nano zinc oxide agent is as follows: S01: Add 5-10 parts of nano zinc oxide to 15-20 parts of 2% hydrochloric acid solution, stir evenly first to obtain nano zinc oxide dispersant; SO2: Add 3-6 parts of glass fiber, 0.45-0.55 parts of sodium dodecyl sulfate and 0.1-0.3 parts of lanthanum sulfate solution to the nano zinc oxide dispersant, stir evenly, and obtain nano zinc oxide compound glass fiber agent; S03: Add the bentonite heat treatment agent to a 5% (w / w) chitosan aqueous solution and stir until homogeneous. Then add 2-4% (w / w) of yttrium nitrate solution to the chitosan aqueous solution and stir thoroughly to obtain a chitosan-modified bentonite agent. The weight of the chitosan aqueous solution is 3-5 times that of the bentonite heat treatment agent. S04: Finally, the chitosan-modified bentonite agent is added to the nano zinc oxide compound glass fiber agent at a weight ratio of 1:5 and stirred for reaction. Finally, it is washed with water and dried to obtain the chitosan-modified bentonite-modified nano zinc oxide agent. The method for preparing the modified whisker solution is as follows: S11, add sodium carboxymethyl cellulose, 5-10% by weight of silicon carbide coupling agent KH560 and 1-3% by weight of silicon carbide whiskers to silicon carbide whiskers, stir evenly, and the weight ratio of silicon carbide whiskers to sodium carboxymethyl cellulose is 5:

1. S12, Feed the product from S11 into a ball mill and ball mill for 1-2 hours at a speed of 1000-1500 r / min. After ball milling, set aside for later use. Add 20-30% sodium alginate aqueous solution and 2-5% sodium silicate aqueous solution by weight of S12 ball milling product to the S13 and S12 ball milling products, stir evenly to obtain modified whisker solution.

2. The composition containing stearyl 1,2-phthalate according to claim 1, characterized in that, The lanthanum sulfate solution has a mass fraction of 4-8%.

3. The composition containing stearyl 1,2-phthalate according to claim 1, characterized in that, The mass fraction of the yttrium nitrate solution is 1-3%.

4. The composition containing stearyl 1,2-phthalate according to claim 1, characterized in that, The bentonite heat treatment agent is obtained by heat-treating bentonite at 300-350℃ for 10-20 minutes, and then cooling it to 40-45℃ at a rate of 1-3℃ / min and holding it at that temperature.

5. The composition containing stearyl 1,2-phthalate according to claim 4, characterized in that, The stirring speed of the SO4 reaction treatment is 450-550 r / min, the stirring time is 35-45 min, and the stirring temperature is 40-45℃.

6. The composition containing stearyl 1,2-phthalate according to claim 1, characterized in that, The sodium alginate aqueous solution has a mass fraction of 10-20%.

7. The composition containing stearyl 1,2-phthalate according to claim 1, characterized in that, The sodium silicate aqueous solution has a mass fraction of 5-10%.

8. The use of a composition containing stearyl 1,2-phthalate as described in any one of claims 1-7 in the preparation of plastic products.

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